Case CX17B Mini Excavator Operators's Manual 87492460 - PDF DOWNLOAD

CX17B Mini Excavator

Operator’s Manual

Print No. 87492460 1st Edition CONSTRUCTION

English 03/2008

CONSTRUCTION

CX17B

OPERATOR’S MANUAL ENGLISH Print No. 87492460

Issued 03/2008 English - Printed in Italy Printed by Studio ti - 20308

INDEX

FOREWORD GENERAL .............................................................................................................................0-1 PERIODIC INSPECTIONS ...................................................................................................0-1 NOTE ....................................................................................................................................0-1 REMARKS RELEVANT TO ORDERS ..................................................................................0-2 NOISE LEVELS (2000/14/EC) ..............................................................................................0-3 SOUND POWER LEVEL ...................................................................................................0-3 SOUND PRESSURE LEVEL AT THE OPERATOR’S SEAT ............................................0-3 LEVEL OF VIBRATIONS TRANSMITTED TO THE OPERATOR.....................................0-3

1. SAFETY PRECAUTIONS 1.1 GENERAL SAFETY INFORMATION ...........................................................................1-3 1.2 SAFETY PRECAUTIONS.............................................................................................1-4 1.3 PRE-START INSPECTIONS........................................................................................1-6 1.4 SAFETY DURING OPERATION ................................................................................1-12 1.5 INSPECTION AND MAINTENANCE SAFETY...........................................................1-23 1.6 PRECAUTIONS DURING BATTERY USE ................................................................1-31 1.7 WARNING LABELS AND DECALS............................................................................1-33 1.7.1

NOTICE FOR WARNING LABELS AND DECALS..............................................1-33

1.7.2

LOCATION OF WARNING LABELS AND DECALS ...........................................1-33

1.8 PROHIBITED MACHINE OPERATION......................................................................1-42 1.9 PRECAUTIONS AT THE END OF DAILY WORK......................................................1-45 1.10 TRANSPORTATION ..................................................................................................1-46 1.11 TOWING THE MACHINE ...........................................................................................1-48

2. MACHINE FAMILIARIZATION 2.1 MACHINE FAMILIARIZATION .....................................................................................2-3 2.2 GENERAL MACHINE NOMENCLATURE....................................................................2-3 2.3 OPERATOR’S CAB NOMENCLATURE.......................................................................2-5 2.4 INSTRUMENTS AND CONTROLS NOMENCLATURE...............................................2-6 2.4.1

GAUGE CLUSTER ................................................................................................2-6

2.4.2

SWITCHES............................................................................................................2-9

2.4.3

LEVERS AND PEDALS.......................................................................................2-11

2.4.4

SEAT BELT .........................................................................................................2-17

2.4.5

CAB (OPTION) ....................................................................................................2-18

2.4.6

GUARD WITH LOCKING DEVICE AND COVERS .............................................2-21

2.4.7

ELECTRICAL EQUIPMENT ................................................................................2-22

2.4.8

SEAT ADJUSTMENT ..........................................................................................2-23

2.4.9

STORAGE BOX AND OTHERS ..........................................................................2-24 1

INDEX

3. BASIC MACHINE OPERATION 3.1 BASIC MACHINE OPERATION...................................................................................3-3 3.1.1

PRE-START CHECK.............................................................................................3-3

3.1.2

CHECKS BEFORE ENGINE START-UP ..............................................................3-4

3.1.3

CONFIRMATION BEFORE STARTING ENGINE .................................................3-9

3.1.4

ENGINE START ..................................................................................................3-10

3.1.5

STOPPING MACHINE ENGINE..........................................................................3-14

3.1.6

INSPECTION AFTER STARTING ENGINE........................................................3-14

3.1.7

MACHINE WARM UP..........................................................................................3-17

3.1.8

MACHINE OPERATION......................................................................................3-18

3.1.9

PRACTICE TO IMPROVE EFFICIENCY ............................................................3-27

3.1.10 MACHINE PARKING...........................................................................................3-30 3.1.11 CHECKS AND VERIFICATION AFTER WORK..................................................3-31 3.1.12 PRECAUTIONS AFTER OPERATION................................................................3-31 3.1.13 AVOID SUDDEN ENGINE STOP........................................................................3-31 3.1.14 MACHINE SECURITY.........................................................................................3-32 3.1.15 CAUTION WHILE USING RUBBER CRAWLERS ..............................................3-33 3.1.16 MACHINE OPERATION WITH ADVERSE WEATHER CONDITIONS ...............3-37 3.1.17 REFER TO SECTION III “PRECAUTIONS WHEN STORING THE MACHINE FOR A LONG PERIOD” ......................................................................................3-39

4. MAINTENANCE 4.1 GENERAL SAFETY INFORMATION ...........................................................................4-3 4.2 GENERAL RULES AND SAFETY PRECAUTIONS.....................................................4-4 4.3 LUBRICANT, FUEL AND COOLANT SPECIFICATIONS..........................................4-10 4.4 MAINTENANCE GENERAL TABLE...........................................................................4-12 4.5 ACCESSORY TOOLS................................................................................................4-13 4.6 TORQUE SPECIFICATIONS FOR CAPSCREWS AND NUTS ................................4-14 4.7 TORQUE SPECIFICATIONS FOR JOINTS AND HYDRAULIC HOSES...................4-16 4.8 INSTALLING HYDRAULIC HOSE AND PIPE JOINTS..............................................4-17 4.9 RELEASING INTERNAL PRESSURE FROM THE HYDRAULIC SYSTEM..............4-18 4.10 BLEEDING AIR IN FUEL SYSTEM ...........................................................................4-19 4.11 REPLACEMENT OF RUBBER CRAWLER ...............................................................4-20 4.11.1 CHECK AND TENSION ADJUSTMENT OF RUBBER CRAWLER ....................4-20 4.11.2 REMOVAL OF RUBBER CRAWLER ..................................................................4-24 4.11.3 INSTALLING RUBBER CRAWLERS ..................................................................4-25 4.12 INSPECTION AND MAINTENANCE TABLE .............................................................4-26 4.13 WHEN REQUIRED ...................................................................................................4-29 4.14 PRE-START (EVERY 8 HOURS) INSPECTION AND MAINTENANCE....................4-39 2

INDEX 4.15 50-HOUR (WEEKLY) INSPECTION AND MAINTENANCE.......................................4-42 4.16 250-HOUR (3–MONTH) INSPECTION AND MAINTENANCE ..................................4-47 4.17 500-HOUR (6-MONTH) INSPECTION AND MAINTENANCE ...................................4-54 4.18 1000-HOUR (12-MONTH) INSPECTION AND MAINTENANCE ...............................4-55 4.19 2000-HOUR INSPECTION AND MAINTENANCE .....................................................4-59 4.20 5000-HOUR INSPECTION AND MAINTENANCE .....................................................4-68 4.21 INSPECTION AND MAINTENANCE TABLE .............................................................4-70

5. TRANSPORTATION 5.1 TRANSPORTATION PLANS........................................................................................5-3 5.2 LIFTING PROCEDURES FOR THE COMPLETE MACHINE ......................................5-5 5.3 LOAD SPECIFICATIONS.............................................................................................5-6

6. SPECIFICATIONS 6.1 GENERAL SPECIFICATIONS .....................................................................................6-3 6.1.1

MACHINE DIMENSIONS ......................................................................................6-3

6.1.2

GENERAL SPECIFICATIONS...............................................................................6-4

6.1.3

CRAWLER TYPE ..................................................................................................6-5

6.1.4

BUCKET TYPE......................................................................................................6-5

6.1.5

ATTACHMENT WORKING RANGES ...................................................................6-6

6.1.6

MACHINE AND COMPONENTS WEIGHT ...........................................................6-8

7. OPTIONAL EQUIPMENT 7.1 OPERATION OF HYDRAULIC BREAKER AND NIBBLER .........................................7-3 7.1.1

SELECTION OF HYDRAULIC BREAKER AND NIBBLER ...................................7-3

7.1.2

BEFORE OPERATING HYDRAULIC BREAKER AND NIBBLER.........................7-3

7.1.3

PREVENTION OF HYDRAULIC OIL CONTAMINATION......................................7-3

7.1.4

ATTACHMENT OPERATION ................................................................................7-3

7.1.5

SETTING THE STOP VALVE................................................................................7-6

7.2 SAFETY PRECAUTIONS.............................................................................................7-7 7.3 REGULAR INSPECTION AND MAINTENANCE .......................................................7-11

8. TROUBLESHOOTING 8.1 GENERAL TROUBLESHOOTING ...............................................................................8-3

9. SPECIAL PROCEDURE 9.1 MOVING A MACHINE STOPPED BECAUSE OF SUDDEN FAILURE .......................9-3

3

INDEX

4

FOREWORD

FOREWORD WARNING READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS AND PROCEDURES FOUND IN THIS MANUAL BEFORE ATTEMPTING ANY OPERATION, INSPECTION OR MAINTENANCE OF THIS MACHINE, ATTACHMENT OR SYSTEMS. MANUFACTURER CANNOT ANTICIPATE EVERY POSSIBLE CIRCUMSTANCE THAT MIGHT INVOLVE A POTENTIAL HAZARD. THE WARNINGS IN THIS PUBLICATION AND ON THE PRODUCT ARE THEREFORE NOT ALL INCLUSIVE. IF A TOOL, PROCEDURE, WORK METHOD OR OPERATING TECHNIQUE NOT SPECIFICALLY RECOMMENDED BY MANUFACTURER IS USED, YOU MUST SATISFY YOURSELF THAT IT IS SAFE FOR YOU AND OTHERS. YOU SHOULD ALSO ENSURE THAT THE PRODUCT WILL NOT BE DAMAGED OR MADE UNSAFE BY THE OPERATION, LUBRICATION, MAINTENANCE AND/OR REPAIR PROCEDURES YOU CHOOSE.

GENERAL •

This manual describes procedures to help the operator gain peak performance through effective, economical machine operation and maintenance for the Hydraulic Excavators.

•

Before operating the machine, operators must thoroughly read and understand all Safety, Operation and Maintenance instructions found in this manual. Failure to follow the instructions given in this manual, may lead to serious injuries to persons and or to equipment failure.

•

Operators and persons working with this machine should continually study this manual until proper Safety, Operation and Maintenance procedures are completely understood.

•

This manual describes the basic operating instruction and techniques for the machine use. Skill is gained as the operator utilizes these techniques and perfects them with an actual machine.

•

Some illustrated pictures may differ from the real version of your machine. As technical updating and improvement of products is continuous. The manuals are constantly updated to reflect these changes.

•

This manual may contain attachments and optional equipment not available in your area. Please contact an authorized Dealer for any optional attachments required.

•

We expressly stress the fact that this manual is written on the presupposition that only genuine Manufacturer’s parts are to be used. Not including cases where parts locally procured were used and/or the machine was arbitrarily modified by the user locally.

•

Materials and specifications are subject to change without notice.

PERIODIC INSPECTIONS •

After delivery of a machine, the Authorized Dealer will make periodic service inspections. Contact an authorized Dealer for any service related questions not explained in this manual.

NOTE •

The contents of this manual may not reflect the specifications of the machine delivered. Contact an authorized Dealer to obtain assistance in specifications for machines equipped with options not contained in this manual.

•

Beyond engaging himself to bring constant technical improvement to the products, the Manufacturer reserves himself also all rights to modify them without previous formal notice.

0-1

FOREWORD

REMARKS RELEVANT TO ORDERS For ordering spare parts and service, inform an authorized Dealer of your machine’s Serial Number and Engine Serial Number stamped in the locations below, and hourmeter reading. Shown on the illustrations below. For future reference, record these Serial Numbers in the spaces provided below: MACHINE No. ENGINE No.

• MACHINE No.

• FOPS, ROPS CERTIFICATION

• ENGINE No.

• HOURMETER

0-2

FOREWORD

NOISE LEVELS (2000/14/EC) SOUND POWER LEVEL Lwa = 93 dB (A) Plate (1) shows the guaranteed sound power level, determined in compliance with 2000/14/EC European Standard.

SOUND PRESSURE LEVEL AT THE OPERATOR’S SEAT Lpa = 79 dB (A) Sound pressure level continuous, equivalent and average (A) measured in compliance with ISO 6396:1992.

LEVEL OF VIBRATIONS TRANSMITTED TO THE OPERATOR The level of vibrations transferred to the operator depend mainly on the ground conditions the work is performed, on the machine’s use modes and its equipment. The exposition to vibrations can be remarkably reduced if the recommendations here below are followed: • use equipment suitable for the machine and the type of work to be carried out; •

adjust and lock the seat in the correct position; regularly check for the seat suspensions and carry out adjustments or maintenance as required;

•

regularly carry out the maintenance of the operator’s seat;

•

operate the equipment evenly, avoiding sudden motion or excessive shocks, if possible;

•

adjust the speed and the transfer path, to avoid as far as possible rough terrains or the collision with possible obstacles, so as to reduce the vibration level.

The weighted average quadratic acceleration value to which the operator’s arms are subjected does not exceed 2.5 m/s2 (8.2 ft/s2). The weighted average quadratic acceleration value to which the operator’s body is subjected does not exceed 0.5 m/s2 (1.6 ft/s2).

NOTE: this machine is equipped with an operator’s seat in compliance with standard ISO 7096:2000.

This guarantees that the operator’s body exposures to vibrations respect the requirements for protection against vibrations when the machine is used according to its destination as explained in this manual.

0-3

FOREWORD

0-4

1. SAFETY PRECAUTIONS

1-1

1. SAFETY PRECAUTIONS

1-2

1. SAFETY PRECAUTIONS

1.1

GENERAL SAFETY INFORMATION

WARNING DO NOT OPERATE OR PERFORM ANY MAINTENANCE ON THIS MACHINE UNTIL ALL INSTRUCTIONS FOUND IN THIS MANUAL HAVE BEEN THOROUGHLY READ AND UNDERSTOOD. IMPROPER OPERATION OR MAINTENANCE OF THIS MACHINE MAY CAUSE ACCIDENTS AND COULD RESULT IN SERIOUS INJURY OR DEATH. ALWAYS KEEP THIS MANUAL IN THE OPERATOR’S SEAT POCKET. IF IT IS MISSING OR DAMAGED, PLACE AN ORDER WITH AN AUTHORIZED DEALER FOR A REPLACEMENT. IF YOU HAVE ANY QUESTION, PLEASE CONSULT AN AUTHORIZED DEALER. 1. Most accidents, which occur during operation, are due to neglect of precautionary measures and safety rules by all persons working with the machine. Erroneous operation, lubrication or maintenance services are very dangerous and may cause injury or death of personnel. Therefore all precautionary measures, NOTES, DANGERS, WARNINGS and CAUTIONS contained in this manual and on the machine should be read and understood by all personnel before starting any work with or on the machine.

2. Operation, inspection, and maintenance should be carefully carried out, and first priority must be given to safety.

Messages of safety are indicated with marks. The safety information contained in this manual is intended only for supplement of safety codes, insurance requirements, local laws, rules and regulations.

3. Messages of safety appear in this manual and on the machine. All messages of safety are identified by the words “DANGER”, “WARNING” and “CAUTION”. a. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

DANGER b. Indicates a potentially hazardous situation which, if not avoided, will result in death or serious injury.

WARNING c. Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against possible damage to the machine and its components.

CAUTION 4. It is very difficult to forecast every danger that may occur during operation. However, safety can be ensured by fully understanding proper operating procedures for this machine according to methods recommended by Manufacturer.

5. While operating the machine, be sure to perform work with great care, so as not to damage the machine, or allow accidents to occur.

6. Continue studying this manual until all Safety, Operation and Maintenance procedures are completely understood by all persons working with the machine.

7. Symbols used in this manual; u (symbol): This symbol indicates an unacceptable practice or unsafe condition.

O (symbol): This symbol indicates an acceptable practice or safe condition.

1-3

1. SAFETY PRECAUTIONS

1.2

SAFETY PRECAUTIONS

WARNING THE PROPER AND SAFE LUBRICATION AND MAINTENANCE FOR THIS MACHINE, RECOMMENDED BY MANUFACTURER, IS OUTLINED IN THE OPERATOR’S MANUAL FOR THIS MACHINE. IMPROPER PERFORMANCE OF LUBRICATION OR MAINTENANCE PROCEDURES ARE DANGEROUS AND COULD RESULT IN INJURY OR DEATH. READ AND UNDERSTAND THE OPERATOR’S MANUAL BEFORE PERFORMING ANY LUBRICATION OR MAINTENANCE. The serviceman or mechanic may be unfamiliar with many of the systems on this machine. Therefore it’s important to use caution when performing service work. Sound knowledge of the system and or components is important before the removal or disassembly of any component.

Because of the size of some of the machine components, the serviceman or mechanic should check the weights noted in this manual. Use proper lifting procedures when removing any components. Weight of components is shown in “MACHINE AND COMPONENTS WEIGHT”, 6-8.

The following is a list of basic precautions that must always be observed.

1. Read and understand all Warning plates and decals on the machine before Operating, Maintaining or Repairing this machine.

2. Always wear protective glasses and protective shoes when working around machines.

In particular, wear protective glasses when using hammers, punches or drifts on any part of the machine or attachments. Use welders gloves, hood/goggles, apron and the protective clothing appropriate to the welding job being performed. Do not wear loose fitting or torn clothing. Remove all rings from fingers, loose jewellery, confine long hair and loose clothing before working on this machinery.

3. Disconnect the battery and hang a “Maintenance in Progress” tag in the operator’s seat. Remove starter keys.

4. If possible, make all repairs with the machine parked on a level, hard surface. Block the machine so it does not roll while working on or under the machine. Hang a “Maintenance in Progress” tag in the operator’s seat.

5. Do not work on any machine that is supported only by lift, jacks or a hoist. Always use blocks or jack stands, capable of supporting the machine, before performing any disassembly.

WARNING DO NOT OPERATE THIS MACHINE UNLESS YOU HAVE READ AND UNDERSTOOD THE INSTRUCTIONS IN THE OPERATOR’S MANUAL. IMPROPER MACHINE OPERATION IS DANGEROUS AND COULD RESULT IN INJURY OR DEATH. 6. Relieve pressure in all air, oil or water systems before any lines, fittings or related items are disconnected or removed. Always make sure all raised components are blocked correctly and be alert for possible pressure when disconnecting any device from a system that utilizes pressure.

7. Lower the bucket, blade or other attachments to the ground before performing any work on the machine. If this cannot be done, make sure the bucket, blade or other attachment is blocked correctly to prevent it from dropping unexpectedly.

8. Use steps and grab handles when mounting or dismounting a machine. Clean any mud grease, oil or debris from steps, walkways or work platforms before using.

Always face the machine when using steps, ladders and walkways. When it is not possible to use the designed access system, provide ladders, scaffolds, or work platforms to perform safe repair operations.

Refer to item “MOUNTING AND DISMOUNTING MACHINE”, 1-8.

9. To avoid back injury, use a hoist when lifting components which weigh 20 kg (45 lb) or more. Make sure all chains, hooks, slings, etc., are in good condition and have the correct capacity. Be sure hooks are positioned correctly. Lifting eyes are not to be side loaded during a lifting operation.

10. To avoid burns, be alert to the presence of hot parts on machines which have just been stopped and hot fluids in lines, tubes and compartments.

1-4

1. SAFETY PRECAUTIONS 11. Be careful when removing cover plates. Gradually back off the last two capscrews or nuts located at opposite ends of the cover or device and carefully pry the cover loose to relieve any spring or other pressure before removing the last two capscrews or nuts completely.

12. Be careful when removing filler caps, breathers and plugs on the machine. Hold a rag over the cap or plug to prevent being sprayed or splashed by liquids under pressure. The danger is even greater if the machine has just been stopped because fluids can be hot.

13. Always use the proper tools that are in good condition and that are suited for the job at hand. Be sure to understand how to use them before performing any service work.

14. Reinstall all fasteners with the same part number. Do not use a lesser quality fastener if replacements are necessary.

15. Repairs which require welding should be performed only with the benefit of the appropriate reference information and by personnel adequately trained and knowledgeable in welding procedures. Determine type of metal being welded and select correct welding procedure and electrodes, rods or wire to provide a weld metal strength equivalent at least to that of the parent metal. Make sure to disconnect battery before any welding procedures are attempted.

16. Do not damage wiring during removal operations. Reinstall the wiring so it is not damaged nor will be damaged in operation of the machine by contacting sharp corners, or by rubbing against some object or hot surface. Do not connect wiring to a line containing fluid.

17. Be sure all protective devices, including guards and shields, are properly installed and functioning correctly before starting a repair. If a guard or shield must be removed to perform the repair work, use extra caution and replace the guard or shield after repair is complete.

18. The maintenance and repair work done while the bucket is raised is dangerous due to the possibility of a falling attachment. Don’t fail to lower the attachment and place the bucket to the ground before starting the work.

19. Loose or damaged fuel, lubricant and hydraulic lines, tubes and hoses can cause fires. Do not bend or strike high pressurized systems, do not install bent or damaged lines. Inspect lines, tubes and hoses carefully. Do not check for leaks with your hands. Very small (pinhole) leaks can result in a high velocity oil stream that will be invisible close to the hose. This oil can penetrate the skin and cause personal injury. Use card-board or paper to locate pinhole leaks.

20. Tighten connections to the correct torque. Make sure that all heat shields, clamps and guards are installed correctly to avoid excessive heat, vibration or rubbing against other parts during operation. Shields that protect against oil spray onto hot exhaust components in event of a line, tube or seal failure must be installed correctly.

21. Do not operate a machine if any rotating part is damaged or contacts any other part during operation. Any high speed rotating component that has been damaged or altered should be checked for balance before reusing.

22. Be careful when servicing or separating the crawlers. Chips can fly when removing or installing a crawler pin.

Wear safety glasses and long sleeve protective clothing. Crawlers can unroll very quickly when separated. Keep away from front and rear of machine. The machine can move unexpectedly when both crawlers are disengaged from the sprockets. Block the machine to prevent it from moving.

Replacing rubber crawler belt must be done carefully by two people. The operator must operate the machine as instructed by the signals of the partner.

The rubber crawler belt is changed by lifting one side of the machine at a time. Unexpected lowering or movement of the machine can result in serious injury or death. Do not operate the boom, arm or bucket / attachment while removing or installing a rubber crawler belt. Follow the instructions provided.

Grease in crawler tensioning mechanism is under extreme pressure and can penetrate skin causing severe injury. Keep face and body away from grease fitting area. Do not loosen grease fitting more than one turn. If grease does not release after one turn of the fitting, call our dealer/distributor for assistance.

Before removing the rubber crawler belt, confirm that the pressure inside the crawler tensioning cylinder has been completely released. Then turn the sprocket. If the procedure on releasing the pressure in the crawler tensioning cylinder is not followed, grease can penetrate skin causing severe injury. If the tension of rubber crawler belt does not release, call the dealer/distributor for repair service.

1-5

1. SAFETY PRECAUTIONS

1.3

PRE-START INSPECTIONS

Many failures that occur during machine operation or servicing result from neglecting fundamental safety precautions. The following safety precautions are given to prevent such failures, but they are only a part of what you must follow. Read, understand and follow all safety precautions found in this manual and on the machine thoroughly before operating the machine.

OBSERVE SAFETY PRECAUTIONS Follow all safety rules, precautions, and operating procedures. If there are other persons or in charge personnel near the machine, have them observe and respect the conventional signs.

OBSERVE SAFETY PRECAUTIONS WEAR PROTECTIVE CLOTHES Wear well fitting safety shoes, hard hat, and working equipment, and put on protective glasses, face shield, ear protection and gloves. When necessary, wear reflective vest.

When operating attachments that produce flying debris, it is strongly recommended to purchase and install protective guards on the machine and close the all window to protect the operator from flying debris. Also the operator and all personnel in the area of the machine should wear protective gear such as safety shoes, hard hat, gloves and face shield or goggles.

WEAR PROTECTIVE CLOTHES

WARNING DO NOT WEAR WORKING CLOTHES CONTAMINATED WITH OIL, SINCE IT WILL EASILY CATCH FIRE. READ AND UNDERSTAND THE OPERATOR’S MANUAL Before operating the machine, read and understand this OPERATOR’S MANUAL thoroughly in order to use the machine effectively and safely.

1-6

1. SAFETY PRECAUTIONS OPERATOR’S MANUAL STORAGE Keep this MANUAL in the specified storage compartment for quick reference. Should the OPERATOR’S MANUAL become lost or damaged, contact an approved Dealer to order the OPERATOR’S MANUAL.

READ MANUAL / STORE IT DO NOT OPERATE MACHINE WHEN OVER TIRED OR UNDER THE INFLUENCE OF DRUGS A poor physical condition causes improper reactions.

Voluntarily refrain from operating the machine when feeling excessively tired, and never operate the machine under the influence of drugs.

REFRAIN POOR PHYSICAL CONDITION ENSURE SAFETY AT THE WORK SITE Know the work area! Before operating the machine, carefully survey and record the land and work site features to prevent the machine from falling or the soil from caving in.

WORK SITE SAFETY - KNOW THE AREA ENGAGE SAFETY LOCK LEVER BEFORE LEAVING MACHINE

1

Before leaving the operator’s seat, move the safety lock lever (1) to the “LOCKED” (up) position. This will prevent the activation of the hydraulic controls, if accidentally shifted. If the lever (1) is not positioned on “LOCKED” and hydraulic controls are touched accidentally, the machine may move suddenly resulting in serious injury.

Also before leaving the machine, lower the bucket to the ground, place the safety lock lever (1) in the “LOCKED” (up) position, stop the engine and remove the starter key.

F26108

SAFETY LOCK LEVER

1-7

1. SAFETY PRECAUTIONS SIGNS, SIGNALS AND FLAGMEN Install signs on soft shoulders and ground areas. Have a flag man direct the operation if necessary. The operator should note marks and follow signals from the flag man. All personnel should know the meaning of the signs, marks, and signals. Only one flag man should give the signs and signals.

SIGNS, SIGNALS AND FLAGMEN KEEP FUEL AND OIL AWAY FROM FLAMMABLE SOURCES Oil, antifreeze, and especially fuel are highly flammable. Keep the machine away from fire sources. Securely tighten all fuel and oil caps. Keep fuel and oil in the designated storage areas. Promptly clean up any spills and dispose of waste properly.

KEEP FUEL AND OIL AWAY FROM FLAMMABLE SOURCES ASSEMBLE SAFETY HOODS Confirm that all hoods and covers are securely installed in compliance with rules. If damaged, immediately restore them to the proper conditions.

Do not operate the machine without hoods. Be sure to maintain them in normal condition.

ASSEMBLE SAFETY HOODS MOUNTING AND DISMOUNTING FROM MACHINE When getting on and off the machine, always maintain three point contact by using the handrails and step. Inspect and clean handrails, step, and mounting parts.

Remove slippery materials, such as lubricants, and mud. Always place the cab door entrance parallel to the crawlers before stopping the engine for dismounting.

MOUNTING AND DISMOUNTING FROM MACHINE

1-8

1. SAFETY PRECAUTIONS PAY ATTENTION TO WORKING MACHINE Do not approach a working machine. Make sure to make visual contact with the operator before approaching a working machine.

PAY ATTENTION TO WORKING MACHINE USE PROPER OPTIONAL ATTACHMENTS Use only optional attachments designed for and approved by the Manufacturer. Read all instructions in the manual relevant to the optional attachment and make sure to understand and observe them. Use of any optional attachment not approved by Manufacturer, can cause serious injury to personnel, damage the machine and its components and shorten the machine’s life.

Contact an authorized Dealer for optional attachments available for the machine.

USE PROPER OPTIONAL ATTACHMENTS USE FOR INTENDED PURPOSE Use the attachment only for its intended purpose. If not used in accordance with the manufacturers instructions, the excessive pressure exerted on the boom, arm and frame structure of the machine will cause premature failure of the components.

USE FOR INTENDED PURPOSE PREVENT FIRES Leaking or spilled fuel, lubricants and hydraulic oil can cause fire and serious injuries. Clean and properly dispose of spills as they occur. Repair or replace all leaking components to prevent fires. Also, clean the machine regularly removing all debris to help prevent fires. Pay particular attention to removal of leaves, sticks, paper etc.

Keep a fire extinguisher in an accessible area and know how to use it in case of fire.

PREVENT FIRES - CLEAN UP SPILLS

1-9

1. SAFETY PRECAUTIONS KEEP CLEAN CAB FLOOR AND OPERATOR’S SEAT Do not place any parts and tools in the operator’s cabin to prevent injury due to slipping and stumbling. Remove any debris from the cab floor, control levers, handrails, etc.

Make sure that all control levers are always clean.

KEEP CLEAN AROUND OPERATOR’S SEAT HOW TO HANDLE LIFE HAMMER-CAB ONLY A life hammer is provided on the right side of cab. In case of emergency, take the life hammer (1), break the cab glass, and escape from the cab. In addition, the life hammer (1) is equipped with a cutter (2) on the lever side, to cut the seat belt, etc.

HOW TO HANDLE LIFE HAMMER-CAB ONLY COMMISSIONING INSPECTION Walk around the machine before commissioning it, perform a PRE-START inspection of the same and make note of any fault. If any problems are found, repair or replace defective components immediately. DO NOT OPERATE THE MACHINE until all problem areas are properly repaired. Always keep the windshield, working lamps, and mirrors clean for good visibility.

COMMISSIONING INSPECTION APPLY NOTICE OF MAINTENANCE IN PROGRESS Before performing any inspection or maintenance procedures to the machine, apply to the controls a “MAINTENANCE IN PROGRESS” tag, to warn persons not to start the machine.

Also inform the supervisor and all operators that the machine is under inspection or maintenance and they will be informed when the machine is ready for normal operation.

APPLY NOTICE OF MAINTENANCE IN PROGRESS

1-10

1. SAFETY PRECAUTIONS PRECAUTIONS AGAINST NOISE If noise is high during operation, hearing loss may result. Approved hearing protection should be used if personnel will be exposed to high noise levels for a long period of time.

PRECAUTIONS AGAINST NOISE AVOID HOT SURFACES AND AREAS Immediately after the machine is operated, the temperature and pressure of the engine coolant, engine oil, and hydraulic oil are very high. Burns may result if caps are removed, or oil, water, or filters are changed under these conditions. Let the components cool down first.

AVOID HOT SURFACES AND AREAS

1-11

1. SAFETY PRECAUTIONS

1.4

SAFETY DURING OPERATION

PASSENGERS This equipment is not intended or designed for the transportation of persons. Never allow persons to ride on the machine. Serious injury or death can result from allowing passengers on or in the machine.

NO PASSENGERS STARTING ENGINE Start engine from the operator’s seat. Do not short-circuit the starter with the battery to start. This may cause serious injury or damage to the electrical system.

DO NOT SHORT CIRCUIT ACTIVATE SOUND HORN BEFORE STARTING THE ENGINE Sound the horn before starting the engine to alert people the machine is being started. Make sure no one is near the machine.

CAUTION Do not start the engine if the “DO NOT OPERATE” tag has been tagged out.

SOUND HORN BEFORE STARTING CHECK AFTER THE ENGINE START Be sure to check machine for proper operation after the engine start. Slowly cycle attachments, swing, and travel functions in an area with sufficient space, without obstacles, and personnel. Failure to do so could result in injury or machine damage. Make note of any defect and repair as needed.

CHECK AFTER THE ENGINE START

1-12

1. SAFETY PRECAUTIONS WARM UP MACHINE BEFORE OPERATION Take sufficient time to warm up the machine, especially in the cold season, otherwise the response of machine to the operation of operating levers is delayed. This may cause injury and/or machine damage.

Set the throttle lever in the middle position (1) between the low and high idle. Operate the engine for around 5 minutes with no load.

MACHINE WARM UP CONFIRM BOOM, ARM AND BOOM SWING CONTROL PATTERNS Before starting to work with the machine, confirm the boom and arm control patterns.

Slowly operate the control levers checking each function to make sure it matches the control pattern shown at the operations station.

• ISO PATTERN LEFT CONTROL LEVER E

RIGHT CONTROL LEVER

ARM OUT

2

A

BOOM DOWN

B

BOOM UP

C

BUCKET IN

D

BUCKET OUT

CONFIRM CONTROL PATTERNS

1 F

ARM IN

G

SLEWING LEFT

4

3 H

SLEWING RIGHT

VERIFY TRAVEL DIRECTION Before activating the control pedals/levers ensure the position of the travel motors.

Be careful, if the travel motors (1) are in the front side of machine, the travel control levers have to be shifted in opposite direction (2).

Sound horn before moving the machine to inform any personnel around the machine that the machine is now in operation.

KNOW TRAVEL MOTOR POSITION

1-13

1. SAFETY PRECAUTIONS DO NOT HIT THE MACHINE WITH THE ATTACHMENT Check clearance between bucket and machine before operation. Slowly operate bucket, check for interference with arm and machine. Exercise care when operating a bucket near machine.

DO NOT HIT CAB SWING Make sure that the swing area of machine is clear of persons. Make sure that the area around, above and underneath the machine is clear of persons or objects, before operating it. Before moving the machine sound the horn or send an acoustic signal, so that nobody can reach the dangerous area. Have a flag man help the operator during operation, to prevent injury to persons or damages to the machine and its working equipment.

SLEW/SWING/TRAVEL SAFETY TRAVELLING ON SLOPES Use extreme caution when travelling on a slope, the machine could turn over or slip.

Keep the bucket at a height of 30 ~ 40 cm (12 ~ 16 in) above ground level, and wear the seat belt at all times.

Never make a change of direction on the slope or cross the slope.

PAY ATTENTION ON A SLOPE FROZEN OR SNOW COVERED WORK SITES Use extreme caution when operating the machine on frozen or snow covered work sites. Operate all controls slowly and cautiously to prevent sudden movements, that may cause the machine to unexpectedly shift, slip or move. Even on the slightest slope, when snow is present or work area is frozen, the machine may unexpectedly move. Snow on shoulders or snow drifts can be much deeper than expected. The machine can easily sink under such conditions. Use extreme caution while operating the machine around or in snow. Be careful for frozen ground that becomes soft along with the increase of temperature.

USE EXTREME CAUTION ON FROZEN OR SNOWY GROUND

1-14

1. SAFETY PRECAUTIONS TRAVEL Before start-up position the attachment as shown in the illustration. On rough terrain move the machine at slow speeds, and do not turn suddenly. Avoid travelling over obstacles. If this cannot be avoided, keep the attachment close to the ground and travel at extremely slow speed.

TRAVEL POSITION FILLED OR UNSTABLE GROUND Be certain the condition of the work site is stable and capable of supporting the machine during operation.

Do not operate the attachment too close to the machine. Operation of the machine on shoulders or filled areas could cause the machine to become unstable presenting accident hazard. Position the crawler at right angles to the shoulder and the travel motors to the rear of the machine, allowing for quick reversal, should the work area become unstable.

WORK ON UNSTABLE GROUND DO NOT USE THIS MACHINE FOR ANYTHING OTHER THAN ITS INTENDED PURPOSE. This machine is designed and manufactured for digging, loading and ground levelling operations only. Any other use can exert excessive force to the machine, its components, its systems and result in serious injury or death to the operator and other personnel working in the area of the machine.

LIFTING This machine is an excavator. Use extreme caution when lifting or moving loads. Use proper lifting equipment rated at a capacity to handle the load. DO NOT USE BUCKET TEETH TO LIFT OR MOVE LOADS.

USE MACHINE ONLY FOR INTENDED PURPOSE AND USE PROPER LIFTING DEVICES

OPERATING ON INCLINES OR SLOPES When operating on a slope the machine risks to become unstable or unbalanced. Work up and down inclines or slopes never across. Never slew or turn machine around on slopes. Prepare a level and safe platform for the machine operation. Operate controls carefully to prevent sudden movements that may cause the machine to slip or tip over.

BUILD BANKING FOR SLOPE OPERATION

1-15

1. SAFETY PRECAUTIONS OPTIONAL EQUIPMENT SAFETY CYLINDERS Do not operate boom, arm or bucket cylinders at stroke ends when using a breaker attachment.

Doing this can cause undue load on the cylinder rods and result in damage.

AVOID CONTINUOUS OPERATION Operate the nibbler/breaker in 30 second intervals.

Operation for longer than 30 second at a time can cause high oil temperatures and the accumulators, cylinder seals and possibly pump damage.

HOSE SURGE Should the hydraulic hoses begin to surge or vibrate abnormally during operation of a breaker or nibbler, immediately stop operation and contact our dealer/distributor for assistance. This problem often is a result of damaged accumulators and can also result in valve failure.

DO NOT USE DROPPING FORCE Do not use the dropping force of the attachment to break or drive objects. This will cause extensive damage to the attachment and machine structure.

1-16

1. SAFETY PRECAUTIONS DO NOT USE SLEWING/SWING FORCE Do not use the slewing/swing force of the machine for pushing or sliding objects. This will cause premature failure of the attachment and other machine components.

DO NOT PRY AND BREAK FORCIBLY Do not use the breaker to pry and break rock and concrete. This may damage the hydraulic breaker, and the excavator boom, arm and hydraulic cylinders.

ARM IN VERTICAL POSITION The arm should not be operated in the vertical position to prevent the hydraulic cylinder from vertical shocks.

This may damage the rod packing and piston and cause oil to leak from those sections.

DO NOT LIFT Do not use an optional attachment to lift or transport objects or material. Doing so can cause extensive damage to the attachment, the machine structures or cause injury or death due to slipping or dropping of load due to improper attachment.

1-17

1. SAFETY PRECAUTIONS WORKING AROUND ELECTRIC POWER LINES If it is suspected that utility lines such as telephone or electrical power lines cross the work area, contact the local utility authority for line location BEFORE beginning to work in the area. Use extreme caution around electrical power lines. Keep a sufficient distance from electrical lines during operation. See below chart for minimum distances.

Line voltage

Minimum distance - metres (feet)

0 ~ 50000

3 (10) OR MORE

50000 ~ 200000

4.5 (15) OR MORE

200000 ~ 350000

6 (20) OR MORE

350000 ~ 500000

7.5 (25) OR MORE

500000 ~ 750000

10.5 (35) OR MORE

750000 ~ 1000000

13.5 (45) OR MORE

KEEP A SAFE DISTANCE FROM UTILITY LINES

WORKING AROUND UNDER GROUND UTILITY LINES During operation it is likely that you will be working around or near buried utility lines which may include, but are not limited to: •

Electrical Power Line

•

Gas Line

•

Water Line

•

Communication Line - Telephone or Cable Television CHECK LOCATION OF UNDER GROUND UTILITIES

Before beginning any trenching, drilling or other construction work it is your responsibility to be aware of all such utility lines buried in the area of your project and to avoid them.

ALWAYS have all local utility companies mark the location of their lines.

Check with local authorities for laws, regulations and/or strict penalties requiring you to locate and avoid existing utilities.

After locating the utility lines, carefully dig a hole by hand and/or automatic vacuum equipment to the utility line to verify the location and depth of the line.

1-18

CALL ALL LOCAL UTILITY COMPANIES BEFORE YOU DIG

1. SAFETY PRECAUTIONS PARKING THE MACHINE Always park the machine on a firm, level surface.

If no firm level surface is available, block the crawlers with wedges (1), lower bucket (2) and dozer blade (3) to the ground, to prevent an unexpected machine movement.

Should the machine be parked on a roadway, move the machine to the shoulder to allow passing of traffic. Also place reflective warning signs and markers at a distance from the machine to safely warn motorists. Refer to local code and regulations regarding the posting of work area warnings and markers.

PARKING SAFETY

RESTRICTED WORK AREAS In work sites with limited height and swing areas such as tunnels, bridges, around electrical power lines, other utilities, or inside structures, use extreme caution in keeping the machine and its attachment a safe distance away to prevent personal injury and/or equipment or structure damage.

Use a flag man to direct the operator.

USE EXTREME CAUTION IN RESTRICTED AREA DO NOT WORK UNDER PRECIPICES Don’t dig under a precipice. It causes falling rocks or loosening of the precipice resulting in injury and/or machine damage.

DO NOT DIG UNDER PRECIPICES WORK WITH SUFFICIENT LIGHTING When working in dark places, turn on the working light.

If required, provide additional lighting facilities to ensure a good visibility.

Stop working when it is impossible to ensure visibility due to fog, snow or rain.

WORK WITH SUFFICIENT LIGHTING

1-19

1. SAFETY PRECAUTIONS SET LIMITS TO WORKING AREAS Set limits around the working area to avoid collision or personal injury. Before starting to work, check for the presence of personnel or obstacles in the area around the machine. Use a flag man to guide the operator whenever necessary.

SET LIMITS TO WORKING AREAS CAUTION FOR WORK IN URBAN AREAS It is dangerous to allow other personnel to enter into the working area.

Make the working area off-limits to other people by providing caution signs.

Make sure to provide a flag man in working areas with heavy traffic to avoid accidents.

USE A FLAG MAN WHEN NECESSARY DO NOT USE NON-SERVICED MACHINE The use of non-serviced machine may cause an unexpected accident or breakdown.

Stop operation of a faulty machine. Make sure to repair any abnormalities before resuming operation.

DO NOT USE NON-SERVICED MACHINE SLIPPERY GROUND Use caution when operating machine on boards or steel plates. Boards and steel plates become very slippery when wet.

Pay special attention when working on inclined areas.

Provide a device to prevent skidding and proceed to work with extra care. Piled up tree leaves or branches also may cause skidding.

PAY ATTENTION TO SLIPPERY SLOPES

1-20

1. SAFETY PRECAUTIONS STRENGTHEN MUDDY GROUNDS When working on a soft ground or marshy area, the machine may sink.

To prevent this risk, provide logs or lumber to pave horizontally to reinforce the ground.

Frozen ground becomes soft along with the increase of temperature. Always check the ground conditions, so as to prevent possible accidents.

STRENGTHEN SOFT GROUNDS LOOSENED GROUND AFTER RAIN After rain, there is a possibility of the machine being exposed to the danger of tumbling down or falling down of the machine under the vibration and weight of the machine, due to the loosened shoulder of the road.

Pay attention to loosened precipices or shoulders of roads, and do not access such places without care.

PAY ATTENTION TO LOOSE GROUNDS LOOSE GROUND AFTER EARTHQUAKE OR DYNAMITING Pay attention to loose precipices or shoulders of roads, and falling rocks. Also pay attention to the unexploded dynamite.

PAY ATTENTION TO LOOSE GROUNDS BOOM, ARM AND ATTACHMENT Give the work you are doing your undivided attention.

Make certain the attachment being used is suited for the job at hand. Make certain of obstacles in the work area and operate the machine within those limits. If necessary have a flag man signal the operator to prevent injury to persons or damage to the machine or obstacles in the work area.

BEFORE LEAVING THE OPERATOR’S SEAT, LOWER THE ATTACHMENT TO THE GROUND AND SET SAFETY LEVER IN “LOCKED” POSITION (UP).

SLEW / SWING SAFETY

1-21

1. SAFETY PRECAUTIONS STABILIZE ATTACHMENTS Stabilize all attachments removed from the machine to prevent the attachment falling over.

STABILIZE ATTACHMENTS

1-22

1. SAFETY PRECAUTIONS

1.5

INSPECTION AND MAINTENANCE SAFETY

UNDERSTAND INSPECTION/MAINTENANCE PROCEDURES Incorrect maintenance may cause not only damages on the machine, but also injury.

Be sure to read and fully understand the maintenance procedures and safety precautions described in this manual before performing any maintenance in this machine.

UNDERSTAND PROCEDURES MEETING PRIOR TO WORK To prevent any accidents or injury due to errors, have a meeting before start working. When a flag man is provided, make sure that all signals are understood accordingly.

MEETING PRIOR TO WORK ORGANIZE AND CLEAN UP WORKING AREA Organize and clean up the working area. Remove any obstacles and also remove any grease, oil, paint, broken pieces, etc., from the working area to avoid injury.

KEEP WORKING AREA CLEAN APPLY NOTICE OF MAINTENANCE IN PROGRESS Before performing any inspection or maintenance procedures to the machine, apply to the controls a “MAINTENANCE IN PROGRESS” tag, to warn persons not to start the machine. Also inform the supervisor and all operators that the machine is under inspection or maintenance and that they will be informed when the machine is ready for normal operation.

APPLY NOTICE OF MAINTENANCE IN PROGRESS

1-23

1. SAFETY PRECAUTIONS USE PROPER TOOLS AND ATTACHMENTS Always use tools that are designed for the task at hand.

Know the proper use of the tools and equipment before starting any inspection or maintenance procedures.

USE PROPER TOOLS POSITION THE ATTACHMENT PROPERLY Always set the machine in the hydraulic oil check position on firm level ground before attempting any inspection or maintenance procedures to the machine. If this is not possible, secure the boom, arm and attachment to help prevent sudden movements.

BEFORE LEAVING THE OPERATOR’S SEAT, LOWER THE ATTACHMENT TO THE GROUND AND SET SAFETY LEVER IN “LOCKED” POSITION (UP).

HYDRAULIC OIL CHECK POSITION

CLEAN THE MACHINE Keep the machine clean and free of debris, excess or spilled lubricants, fuel and fluids. Use approved solvents, detergents and water to clean the machine and its components on a regular basis. Be careful not to allow water to reach electrical components. Serious damage can occur to the electrical system by allowing water to reach the electrical components. Never clean the inside of the cab, or electrical components with pressurized water or steam.

KEEP MACHINE CLEAN STOP ENGINE Before starting any inspection or maintenance operation on the machine, MAKE SURE THAT THE ENGINE HAS BEEN STOPPED AND POSITION THE SAFETY LOCK LEVER IN “LOCKED” POSITION (UP). Failure to stop engine could result in serious bodily injury or death.

STOP ENGINE / ENGAGE SAFETY LOCK LEVER TO “LOCKED” POSITION

1-24

1. SAFETY PRECAUTIONS REFUELLING Move the machine to a well ventilated area for refuelling. Use only specified fuel as described in the MAINTENANCE section of this MANUAL. Immediately clean up all spilled fuel and dispose of waste properly. After refuelling is complete, securely tighten fuel cap.

Never use the fuel for cleaning.

REFUELLING SUPPORT THE MACHINE If it is necessary to raise the machine for inspection or maintenance operations, always support the same by positioning it as shown in the illustration and use safety supports (1) with sufficient capacity or safety wedges (2) under the crawlers or wooden boards.

NEVER INSPECT OR PERFORM MAINTENANCE PROCEDURES UNDER A RAISED MACHINE THAT IS NOT SUFFICIENTLY SUPPORTED.

SUPPORT THE MACHINE HYDRAULIC PRESSURE Under normal conditions, all circuits of the hydraulic system are under extreme pressure. When inspecting for leaks, use a small piece of cardboard, wood or metal to locate leaks. SMALL (PINHOLE) LEAKS CAN BE DANGEROUS IF CONTACT WITH SKIN OR EYES IS MADE. Wear approved safety glasses or face shield, gloves, hard hat, safety shoes and work clothes during all inspection and maintenance procedures.

Seek for immediate medical assistance if injury occurs.

CHECKING FOR HIGH PRESSURE LEAKS PRESSURIZED FLUIDS AND LUBRICANTS Always release pressure from hydraulic tank, engine coolant, fuel system and all systems under pressure before removing any caps or components. Escaping fluid under pressure can penetrate the skin causing serious injury. BE CAUTIOUS OF HOT FLUIDS AND GASSES FROM SYSTEMS ON MACHINES THAT HAVE JUST BEEN STOPPED. ALLOW SUFFICIENT TIME FOR SYSTEMS TO COOL BEFORE PERFORMING ANY INSPECTION OR MAINTENANCE PROCEDURES. RELEASE HYDRAULIC TANK PRESSURE

1-25

1. SAFETY PRECAUTIONS CARE FOR PROPER VENTILATION Maintenance for the machine indoor or in a place with poor ventilation, may cause poisoning by gas.

Pay special attention to ventilate any exhaust gas, fuel, cleaning oil, paint or similar articles.

Ensure proper ventilation in the working area when the machine is operated indoors. Provide a ventilating fan, if required.

CARE FOR PROPER VENTILATION PREVENTIVE MEASURES AGAINST FIRE During maintenance, it is unavoidable to handle flammable materials such as batteries, fuel, lubricating oil, etc.

To prevent fire: • Use a non-flammable cleaning oil.

•

Extinguish any naked flame capable of causing fires.

•

Provide appropriate fire fighting equipment, such as fire extinguishers.

•

Refrain from smoking during maintenance work.

•

Keep away from flammable materials during grinding or welding.

PREVENTIVE MEASURES AGAINST FIRE

USE APPROVED WORK LIGHTS Use only approved work lights when performing inspection and maintenance procedures to prevent possible fire or explosion. Certain types of work lights should not be used due to the possibility of ignition of certain flammable gasses and fluids.

USE APPROVED WORK LIGHTS DO NOT HEAT HYDRAULIC EQUIPMENT OR PIPING Hot hydraulic components or piping will cause gas expansion, that can easily catch fire.

Dangerous works like welding, brazing, torch heating, etc. on components or ducts of the hydraulic system, or in the vicinity of it are not allowed.

DO NOT HEAT HYDRAULIC PIPING

1-26

1. SAFETY PRECAUTIONS WORKING ON HIGH PLACES To work on high places can generate danger of falls. Be careful not to approach edges.

•

Make sure to use the appropriate equipment, such as: ladders, man lifts etc.

In addition, strap yourself to the proper equipment accordingly.

•

Avoid spillage of any oil or grease.

•

Do not leave any tools around the working area.

•

Use extreme caution to avoid slipping while walking.

•

Never jump into or from climbing equipment. Use a step-ladder or handrail and securely maintain a three point contact while mounting or dismounting at all times.

•

Make sure to read the man lift equipment operator’s manual before using.

•

Comply with climbing equipment weight ratings.

TAKE CARE AT ELEVATED SPOTS

DO NOT DROP TOOLS OR PARTS Dropping of any tools and parts in the working area may cause injury or faulty machine operation.

Do not leave tools or articles in the working area or component compartments. Be sure to store all tools properly when the work is completed.

DO NOT DROP TOOLS OR PARTS ELECTRICAL SYSTEM Before performing any inspection or maintenance to the electrical system, or performing any welding procedures, disconnect the negative (–) cables from the battery terminals. Not disconnecting the negative (–) cable could cause extensive damage to the electrical system.

ELECTRICAL SYSTEM PRECAUTIONS

1-27

1. SAFETY PRECAUTIONS CAUTION WITH MODIFICATIONS We will not be liable for any injury or damages due to equipment modification without approval.

When any modification is intended, consult with an authorized Dealer in advance.

CAUTION WITH MODIFICATIONS AFTER COMPLETION OF MAINTENANCE WORK Always, be sure to check the machine for proper functioning when any maintenance work is completed: •

After any maintenance work is completed, operate the engine at low idle, and check for leakages and abnormalities.

•

Slowly operate each machine control to confirm proper operation.

•

Increase the engine speed gradually, and again check for leakages and abnormalities.

•

Operate each operating lever normally to confirm correct operation.

CHECK FOR CORRECT OPERATION

DISPOSE OF WASTE PROPERLY Dispose of oils, fuel, coolant, solvents, filters, batteries etc. according to federal, state and local codes and regulations regarding hazardous waste disposal. Contact local authorities for proper disposal methods of such materials.

DISPOSE OF WASTE PROPERLY

1-28

1. SAFETY PRECAUTIONS GENERAL GUIDELINES FOR WELDING Welding work must be performed by a certified welder with sufficient experience. In addition, safety practices must be followed by any personnel involved in such work. Identify all cracks to be repaired or areas to be welded by thoroughly cleaning the suspected surface, remove paint, and check with dye penetrant or magnetic particle testing. The life expectancy of the welded area depends on the work quality and the attention given to details during welding.

•

Turn starter key to “OFF” position. Wait 4 seconds for electrical power to disconnect.

•

Remove negative (–) cable from battery terminal.

•

Attach welder ground cable with 1 m (3’3”) away from component being welded.

•

Make sure welder ground is not located at a seal or bearing. Do not locate welder ground at seal or bearing.

•

Make sure that no bearings nor seals separates the welder ground and the weld area.

•

Avoid welding structures with surface temperatures below 16 °C (60 °F).

PAY ATTENTION TO WELDING WORK

If needed, preheat surface with a hand torch. In cases where the machine components are extremely cold, we recommend to bring the components inside and to allow them to warm up to 16 ~ 20 °C (60 ~ 70 °F) for at least 12 hours prior to welding.

•

Remove paint from any surface to be heated or welded. Painted surfaces produce unhealthy gases when heated or welded. Use mask and proper skin protection when removing paint from any surface.

When removing paint sanding, do not breath the generated dust. Be sure to use plenty of soap and water to rinse the surface to be welded, since chemicals will generate unhealthy gases when heated and/or welded.

WARNING •

• • • • •

HAVE A FIRE EXTINGUISHER ON HAND AT ALL TIMES WHILE GRINDING, HEATING, OR WELDING. BE SURE TO CLEAN OIL AND/OR FLAMMABLE MATERIALS FROM ANY SURFACE TO BE CUT. PROTECT ALL FLAMMABLE PARTS AND SURFACES FROM SPARKS AND/OR FLAMES. BE SURE TO PERFORM WORK IN A WELL VENTILATED AREA. KEEP SPARKS AND FLAMES AWAY FROM PAINT AND/OR SOLVENT. KEEP SPARKS AND FLAMES FROM CYLINDER RODS, SEALS, ELECTRICAL WIRES, AND/OR HYDRAULIC HOSES.

1-29

1. SAFETY PRECAUTIONS ADJUSTING CRAWLER TENSION The grease used to adjust the crawler tension is under extreme pressure in the cylinder. Use extreme caution when adjusting crawler tension.

KEEP FACE, HANDS AND LEGS AWAY FROM THE GREASE NIPPLE AREA. Carefully and slowly loosen the grease nipple when adjusting crawler tension. Never loosen grease nipple more than one complete turn. Refer to for the procedures to adjust the tension on the crawler 4-20.

USE CAUTION WHEN ADJUSTING CRAWLERS PAY ATTENTION TO BROKEN PIECES WHEN HAMMERING Flying particles may cause injury when hammering hard metal parts, such as pin, edge, tooth, bearing, etc.

Wear protective clothes such as protective glasses, safety hat, etc. during maintenance.

USE CAUTION WHEN HAMMERING

1-30

1. SAFETY PRECAUTIONS

1.6

PRECAUTIONS DURING BATTERY USE

WEAR PROPER PROTECTIVE CLOTHES Wear long sleeve shirt, gloves and approved safety glasses or face shield when working with or around batteries. Battery electrolyte (acid) will cause severe scalds if allowed to make contact with clothing, skin or eyes. Should electrolyte (acid) come in contact with clothes, skin or eyes, immediately remove effected clothing, flush area with clean water for 15 minutes and get prompt medical attention.

WEAR PROTECTIVE CLOTHES KEEP AWAY FROM FIRE OR NAKED FLAMES Never allow batteries in the vicinity of fire or naked flames and do not smoke when working with batteries.

Explosive hydrogen gas is produced by the electrolyte in the batteries. Always work with batteries in a well ventilated area.

KEEP AWAY FROM FIRE OR NAKED FLAMES CHARGING BATTERY Charge the battery in a well ventilated area. When charging battery, remove cell caps to allow gasses to escape. Avoid breathing gasses from battery.

To avoid electrical arcing or explosion, do not put tools or other items that can cause a short on the battery.

To avoid damaging battery, do not put heavy items on the battery.

Do not use battery area for storage of parts and components.

1-31

1. SAFETY PRECAUTIONS USING BOOSTER CABLES •

If using another machine or vehicle to boost batteries, make certain the machine or vehicle DOES NOT touch the disabled machine.

•

Ensure the position of positive (+) and negative (–) terminals on booster battery and battery of disabled machine, before connecting booster cables.

•

Connect the positive (+) cable first, then the negative (–) one.

•

Disconnect the negative (–) cable first, then the positive (+) one.

•

Refer to BASIC MACHINE OPERATION section of this manual for proper procedures for use of booster cables.

WARNING IMPROPER BOOSTER CABLE CONNECTIONS CAN CAUSE AN EXPLOSION RESULTING IN PERSONAL INJURY. CONNECT BOOSTER CABLES USING FOLLOWING PROCEDURE: 1. CONNECT BOOSTER CABLE TO POSITIVE (+) BATTERY TERMINAL OF DISCHARGED BATTERY. CONNECT OTHER END OF BOOSTER CABLE TO POSITIVE (+) BATTERY TERMINAL OF NORMAL BATTERY. 2. CONNECT OTHER BOOSTER CABLE TO NEGATIVE (–) BATTERY TERMINAL OF NORMAL BATTERY. CONNECT OTHER END OF BOOSTER CABLE TO UPPER FRAME OF TROUBLED MACHINE. 3. START ENGINE AND REMOVE BOOSTER CABLES IN REVERSE ORDER.

(A) Booster battery (B) Discharged battery (C) Red cable (D) Black cable (E) To the upper frame of the troubled machine Cable connecting order: 1>2>3>4 Cable disconnecting order: 4>3>2>1

OTHER PRECAUTIONS •

Pay attention to danger of sparks triggered off by erroneous connection between the positive (+) terminal of battery and the machine body with a tool, etc.

•

Make certain of tightening the battery caps.

•

Securely tighten up the battery terminals.

•

Leave the waste battery to a specialist for disposal.

1-32

1. SAFETY PRECAUTIONS

1.7

WARNING LABELS AND DECALS

Warning labels and decals are affixed to the machine to remind operators and personnel specific safety precautions in certain areas of the machine. The following are illustrated examples of all warning labels and decals along with their locations.

1.7.1

NOTICE FOR WARNING LABELS AND DECALS

•

Do not take away the attached warning labels and decals.

•

Confirm whether labels can be easily read.

If words or illustrations are illegible, clean off or replace the labels.

•

Use a cloth, water, and detergent to clean the labels. Never use organic solvents or gasoline.

•

If labels are damaged, missing or illegible, replace them with new ones.

Contact your Dealer for new safety labels.

1.7.2

LOCATION OF WARNING LABELS AND DECALS

1-33

1. SAFETY PRECAUTIONS

1-34

1. SAFETY PRECAUTIONS

1-35

1. SAFETY PRECAUTIONS 1.

BOOM AND ARM MOVEMENT WARNING PLATE Located on seat stand cover.

It shows the danger represented by the bucket hitting the cab.

Pay special attention as no stops are provided to prevent this problem.

2.

CRAWLER FRAME/DOZER - CAUTION Located on seat stand cover.

3.

ELECTRICAL LINES SAFETY DECAL; SAFETY SYSTEMS Located on seat stand cover.

It warns about danger in the case of work near electrical lines.

It is imperative for the operator when leaving the cab with engine running, even for a very short time, to move the safety lever to “LOCKED” position. Controls are thereby disconnected and any accidental equipment movement is impossible.

1-36

1. SAFETY PRECAUTIONS 4.

HOT SURFACE DECAL Located on bracket of radiator tank.

Immediately after the machine is operated, the temperature and pressure of the engine coolant, engine oil, and hydraulic oil are very high. Burns may result if caps are removed, or oil, water, or filters are changed under these conditions. Let the components cool down first.

5.

PRESSURIZED FLUIDS AND LUBRICANTS Located on control box.

Always release pressure from hydraulic tank, engine coolant, fuel system and all systems under pressure before removing any caps or components. Be cautious of hot fluids and gases from engines that have just been stopped. Carry out inspection and maintenance operations only after the systems have cooled down.

6.

ENGINE STOP DECAL Located on engine radiator.

It indicates you have to stop the engine before opening the engine hood.

Danger of serious injury because of rotating pieces like, fan, pulleys and belts.

1-37

1. SAFETY PRECAUTIONS 7.

DECAL, COUNTERWEIGHT SAFE OPERATING AREA Located on bonnet support.

Make sure that exposed personnel in the area of operation are clear of the machine before moving the machine or its attachments. Sound horn.

8.

ENGINE STOP DECAL Located on engine radiator.

It indicates you have to stop the engine before opening the hood.

Pay special attention as no stops are provided to prevent this problem.

9.

BOOSTER CABLES DECAL Located on counterweight.

It warns about the danger of starting the engine with booster cables.

1-38

1. SAFETY PRECAUTIONS 10. CRAWLER ADJUSTER DECAL Located on crawler frame.

It shows that it is obligatory to consult the Operator’s Manual prior to acting on the crawler adjust valve.

Danger of severe injuries.

11. DECAL OF ATTACHMENT SAFE AREA OF OPERATION Located on both sides of the arm.

Make certain area is clear of obstacles and persons before beginning the operation of the machine. Always look around before you start the swing operation.

Make sure that nobody stays in the operation range of the machine. Sound horn before moving the machine.

12. DOZER BLADE DECAL Located on seat stand cover.

It indicates to consult the Operator’s Manual before operating the dozer blade controlling lever.

1-39

1. SAFETY PRECAUTIONS 13. BATTERY DECAL Located on battery box cover.

Hydrogen generates in the battery and it is easily flammable. Do not produce sparks and naked flames near a battery, to prevent this from catching fire and explode.

14. SLEWING LOCK Located on the front lower side of the operator’s seat.

15. CANOPY MOUNT BOLTS Located on canopy support.

1-40

1. SAFETY PRECAUTIONS 16. SEAT BELT Located on the ceiling (canopy).

17. COUNTERWEIGHT LIFTING EYES Located on counterweight.

1-41

1. SAFETY PRECAUTIONS

1.8

PROHIBITED MACHINE OPERATION

The following are examples of machine abuse. The machine should never be used in this way also by the most experienced operators. Such abuse and misuse of this machine and its attachments can result in serious bodily injury, death, severe equipment damage and shortened service life of the machine. Under no circumstance should any of these operations be attempted. Use common sense and follow proper operation procedures found in this MANUAL while operating this equipment.

DO NOT USE TRACTIVE FORCE OF THE MACHINE FOR LOADING THE BUCKET ATTACHMENT Doing so will exert excessive force on the machine structure, front end attachments and could cause severe equipment damage. Use crawlers for normal travel operations only.

DO NOT USE TRACTIVE FORCE DO NOT USE SLEWING AND SWINGING FORCE OF THE MACHINE FOR OPERATIONS Doing so will exert excessive force on the machine structure, front end attachments and shorten life of the slewing and swinging system of the machine. Also, serious injury or death could result from such operations.

DO NOT USE SLEWING AND SWINGING FORCE DO NOT HAMMER WITH ATTACHMENT Performing operations such as hammering and piling will cause extensive damage to the machine and its components. Also, serious injury or death could result from such operations.

DO NOT HAMMER WITH ATTACHMENT DO NOT USE THIS MACHINE FOR ANYTHING OTHER THAN ITS INTENDED PURPOSE This machine is designed and manufactured for digging, loading and ground levelling operations only. Any other use can exert excessive force to the machine, its components, its systems and result in serious bodily injury or death to the operators and other personnel working in the vicinity of or with the machine.

USE ONLY FOR INTENDED PURPOSE

1-42

1. SAFETY PRECAUTIONS DO NOT OPERATE BUCKET AND ARM CYLINDERS TO STROKE END REPEATEDLY If bucket and arm cylinders are forcibly driven to stroke end, to clean debris from the bucket, this will cause the vibration of the bucket cylinders and consequently their damaging.

Use high pressure water or manually remove stubborn material from the bucket.

DO NOT OPERATE CYLINDER TO STROKE END DO NOT OVER EXERT THE MACHINE Know the limitations of the machine and its attachments and operate the machine within those specifications.

Do not exceed lift charts.

Never tip or raise the machine to obtain power to move material.

This could cause extensive damage to the machine and its components as well as result in serious bodily injury or death.

DO NOT OVER EXERT THE MACHINE CAUTION WITH DOZER BLADE HITTING OBSTACLES Pay attention that the dozer blade does not hit any obstacles such as rock lumps.

It causes damage to the dozer blade and cylinder.

DO NOT HIT ROCKS, WITH DOZER BLADE CAUTION WITH RETRACTING ATTACHMENT When the attachment is retracted for travel or transport, pay attention that the bucket does not to hit the dozer blade.

DO NOT HIT DOZER BLADE WITH BUCKET DO NOT SUPPORT MACHINE WITH DOZER BLADE AT ONE END When the dozer blade is used as a stabilizer, do not support the machine at one end of the dozer blade, but surely at both ends.

DO NOT SUPPORT MACHINE WITH DOZER BLADE AT ONE END

1-43

1. SAFETY PRECAUTIONS CAUTION WITH DEEP EXCAVATIONS Pay attention during deep excavation to the dozer blade in front. The boom cylinder could come in contact with the dozer blade.

Place the dozer blade at the back of the machine for deep excavations, unless the working area does not permit it.

TAKE CARE WITH DEEP EXCAVATIONS

1-44

1. SAFETY PRECAUTIONS

1.9

PRECAUTIONS AT THE END OF DAILY WORK

Perform all of the following procedures after each work shift is complete, to insure the machine is in optimal operating condition for the next work shift or job site. a. Move the machine to a firm, level surface. b. Lower attachment to the ground. c. Refill fuel tank to full mark to reduce air volume and condensation (moisture). This will decrease the possibility of freezing in the fuel tank, rusting due to moisture and other problems associated with start up and operation. d. Close and secure all windows in place to prevent water or moisture reaching the electrical components of the machine (CAB only). e. Thoroughly clean and inspect the machine. Perform lubrication, maintenance and repair, or replace any problem areas found, before restarting the machine. f.

If operating the machine in cold climates, it may be necessary to remove the batteries from the machine and store in a warm well ventilated area. Install the batteries in the machine before next start up. This will help prevent premature battery deterioration.

g. Remove key from key switch and lock all doors and access panels.

1-45

PRECAUTIONS AT THE END OF DAILY WORK

1. SAFETY PRECAUTIONS

1.10

TRANSPORTATION

Use the following general guidelines for loading or unloading the machine on a transportation vehicle: •

Loading and unloading of the machine must be carried out on firm level areas away from the road shoulder. Do not use the attachments to load or unload the machine from the trailer.

TAKE CARE ON LOADING AND UNLOADING •

When needed, use a ramp capable of withstanding the machine weight. Check the ramp’s width, length and thickness to secure the loading/unloading work. And when much warp appears on the ramp structure, support them with safety blocks or alike.

•

Remove any mud, oils and grease from the ramp surface as well as from crawlers on the machine, to prevent the machine from side skidding.

•

Do not change the travel direction on the ramp.

When required, back down the machine to the ground, reposition and try again.

•

Always use low travel speed for loading or unloading from the trailer.

•

After loading the machine, shut off the engine and set the safety lock lever from “UNLOCKED” “B” to “LOCKED” position “A” (up).

•

Use cables or wire ropes (1) with sufficient length to secure front and rear of the machine to trailer. Provide blocks to the machine crawlers, to avoid any movement of the machine.

•

Protect wire ropes against edges with pads (2).

USE RAMP FOR LOADING AND UNLOADING

SECURE FROM MOVEMENT

1-46

1. SAFETY PRECAUTIONS •

During the transport, observe legal regulations concerned, keeping safety in mind.

•

Select the routing taking overall height and length of the truck into consideration.

•

Refer to chapter 5. “TRANSPORTATION” for the details of loading, unloading and fixing procedures of the machine.

A. OVERALL HEIGHT B. OVERALL LENGTH

OBSERVE LEGAL REGULATIONS

1-47

1. SAFETY PRECAUTIONS

1.11

TOWING THE MACHINE

1. If the machine should become stuck in soft soil areas it may be necessary to tow the machine. Attach a wire cable or chain to the lower frame, with the capacity to pull the machine out.

2. Attach other end to the vehicle used for towing. Operate the machine’s travel lever in the proper direction while towing with the other vehicle.

WARNING • • • •

• •

WHILE TOWING, DO NOT ENTER THE AREA BETWEEN THE MACHINE AND TOWING VEHICLE. DO NOT APPLY A SHOCK LOAD ONTO THE TOWING ROPE. DO NOT USE EYES ON MACHINE LOWER FRAME TO TOW MACHINE. KEEP THE WIRE CABLE HORIZONTAL, AND PERPENDICULARLY TO THE CRAWLER FRAME. TOW THE MACHINE SLOWLY AT LOW SPEED MODE. FOR THE TOWING OF THE MACHINE BODY, PROVIDE PADS TO BE APPLIED TO THE CORNER OF CRAWLER FRAME TO PREVENT THE WIRE CABLE AND CRAWLER FRAME FROM ANY DAMAGE.

NOTE: DO NOT PULL MACHINE UTILIZING THE BRACKETS WELDED ON THE LOWER PLATES OF THE CHASSIS. THESE BRACKETS ARE PROVIDED FOR PULLING LIGHTWEIGHT OBJECTS. SEE FIGURE FOR BETTER REFERENCE.

1-48

TOW MACHINE PROPERLY

2. MACHINE FAMILIARIZATION

2-1

2. MACHINE FAMILIARIZATION

2-2

2. MACHINE FAMILIARIZATION

2.1

MACHINE FAMILIARIZATION

All operators, service mechanics and personnel responsible for operation, inspection and maintenance of the machine should become thoroughly familiar with the controls and components and their functions before working with or on this equipment. Study the information in this section to become familiar with the controls and components of this machine.

2.2

GENERAL MACHINE NOMENCLATURE

The nomenclature drawing below, points out locations of major components of the hydraulic excavator. Study these areas and locate these components on the machine. Specific information regarding these components are explained on the following pages of this section.

No.

NAME

No.

NAME

No.

NAME

1

Arm

11 Air cleaner

21 Control valve

2

Arm cylinder

12 Battery

22 Lower roller

3

Bucket cylinder

13 Engine

23 Idler adjuster

4

Idler link

14 Counterweight

24 Front idler

5

Bucket link

15 Slewing motor

25 Crawler

6

Boom

16 Hydraulic pump

26 Dozer

7

Canopy

17 Travel motor

27 Dozer cylinder

8

Swing cylinder

18 Hydraulic tank

28 Boom cylinder

9

Fuel tank

19 Slewing bearing

29 Bucket

10 Radiator, oil cooler

20 Guard

2-3

2. MACHINE FAMILIARIZATION A. FRONT, REAR, RIGHT AND LEFT DIRECTION In this manual, the “front” “A”, “rear” “B”, “right” “D” and “left” “C” directions are based on the conditions where the travel motors are positioned at the rear (1) and the operator is facing the direction in which the machine advances (forward).

B. DESIGNATION OF OPERATION

A. Arm out

I.

B. Arm in

J. Slewing left

C. Boom up

K. Travelling forward

D. Boom down

L. Travelling reverse

E. Bucket out

M. Dozer down

F. Bucket in

N. Dozer up

G. Boom swing left H. Boom swing right

2-4

Slewing right

2. MACHINE FAMILIARIZATION

2.3

OPERATOR’S CAB NOMENCLATURE

The operator’s cab nomenclature, see figure below, points out locations of operator controls in the hydraulic excavator operator cab. Study these areas and locate these components on the machine. Specific information regarding these components are explained on the following pages of this section.

No.

NAME

No.

NAME

No.

NAME

1 Crawler/dozer shifting lever

2 Safety lock lever

3 Left operating lever

4 Horn switch

5 Option pedal (nibbler and breaker)

6 Left travel pedal

7 Left travel lever

8 Travel speed select switch

9 Right travel lever

10 Right travel pedal

11 Slewing lock lever

12 Boom swing operating pedal

13 Right operating lever

14 Dozer blade operating lever

15 Starter switch

16 Throttle lever

17 Monitor panel (gauge cluster)

18 Operator seat

2-5

2. MACHINE FAMILIARIZATION

2.4

INSTRUMENTS AND CONTROLS NOMENCLATURE

The following information provides a brief description and function of the components and controls of the hydraulic excavator.

All personnel associated with this machine should read and understand this information BEFORE beginning any work with or on this equipment.

2.4.1

GAUGE CLUSTER

The gauge cluster consists of the following.

GROUP A GAUGES

No.

NAME

1 FUEL LEVEL GAUGE 2 HOURMETER

B INDICATOR LAMP

3 GLOW LAMP (Yellow) 4 HIGH (2nd) TRAVEL SPEED LAMP (Yellow) 5 BATTERY CHARGE LAMP (Red) 6 ENGINE OIL PRESSURE LAMP (Red)

C WARNING LAMP

7 COOLANT TEMPERATURE LAMP (Red)

2-6

2. MACHINE FAMILIARIZATION A. GAUGES 1. FUEL LEVEL GAUGE This indicates the amount of fuel. F: Full tank is about 25 litres (6.6 gal) This gauge indicates the remaining volume of fuel in the fuel tank. Refuel when the indicator is approaching to the “E” point. Refill the fuel tank with diesel fuel only. Normally the pointer takes time to move up to the appropriate level after turning the key switch to the ON position. See page 3-7.

1. WHITE: Operating zone 2. RED: Refill

2. HOURMETER The hourmeter indicates the total time the engine has run. Even if the machine is not moving, the meter continues to count as long as the engine is running, regardless of the engine speed. While the engine is running, the indicator flashes to show that the hourmeter is active. Use the hourmeter as reference for maintenance.

B. INDICATOR LAMP This lamp indicates the working conditions.

3. GLOW LAMP (Yellow) This symbol is displayed when key switch is turned to “HEAT” position and the engine preheat circuit is activated.

When engine startup is difficult to cold climate, use the pre-heater to start the engine easily.

4. HIGH (2ND) TRAVEL SPEED LAMP (Yellow) This indicator will be illuminated when the travel speed is switched to high (2nd) speed. The travel speed selector switch is located on the grip of the right travel lever.

The speed automatically returns to low (1st) speed when the starter key switch is set to “OFF”.

C. WARNING LAMPS

CAUTION When one of these warning lamp lights up, stop immediately to work. Then investigate the cause for it, and carry out appropriate inspection and maintenance referring to the section “MAINTENANCE”.

2-7

2. MACHINE FAMILIARIZATION 5. BATTERY CHARGE LAMP (red) It warns about a fault in the battery charging system during engine running. This lamp will illuminate when the starter key is turned to “ON” but it must switch off when the engine starts. If this lamp does not switch off, the battery does not charge correctly. Check the charging system.

See section 4. “MAINTENANCE” for details.

6. ENGINE OIL PRESSURE LAMP (red) This lamp will illuminate when the starter key is turned to “ON” but it must switch off when the engine starts.

During machine operation, if the engine oil pressure lowers irregularly, this lamp turns on. Stop the engine and check the quantity of engine oil. (Refer to 3-5).

CAUTION The engine may undergo severe damages, if the machine is operated with the engine oil pressure lamp illuminated.

7. COOLANT TEMPERATURE LAMP (red) If the coolant temperature rises irregularly, a warning lamp lights up.

•

The coolant temperature may rise irregularly, if the engine is overloaded.

CAUTION The engine may undergo severe damages, if the machine is operated with the engine oil pressure lamp illuminated.

1. If the engine is overheating, stop operation immediately and let the engine idle, to lower its temperature.

2. Once the coolant has cooled down, stop the engine.

3. Check the coolant quantity, the fan belt tension and the radiator filter clogging, etc.

See section 4. “MAINTENANCE” for details.

WARNING DO NOT PERFORM ANY KIND OF MAINTENANCE ON AN ENGINE THAT HAS JUST STOPPED WORKING. IMMEDIATELY AFTER ENGINE STOP, FLUIDS AND SURFACES WILL BE EXTREMELY HOT. ALLOW THE ENGINE TO COOL, BEFORE PROCEEDING TO INSPECTION AND/OR MAINTENANCE.

2-8

2. MACHINE FAMILIARIZATION 2.4.2

SWITCHES

1. Starter Key Switch 2. Travel speed select switch 3. Horn switch 4. Travel alarm select switch

1. KEY SWITCH This switch is used to start or stop the engine.

“HEAT”: When engine start up is difficult due to cold climate, turn the key to this position, to activate the pre-heating.

Hold the key in this position for about 15 seconds to ease up the engine start. Release key after engine start.

“OFF”: In this position, the electric system is not powered and the engine is stopped.

“ON”: In this position, all machine’s electric circuits are energized. Maintain the key in this position while the machine is operating.

“START”: Turn the key to this position to start the engine and release it after the engine starts, the key will automatically return to “ON”.

2-9

2. MACHINE FAMILIARIZATION 2. TRAVEL SPEED SELECT SWITCH Use this switch to select travel speed, HIGH (2nd) or LOW (1st). When you shift the start key from “ON” to “OFF”, the travel speed returns automatically to LOW speed. Select the required speed before to start travelling.

WARNING TRAVEL WITH THE MACHINE IN LOW SPEED ON A SLOPE AND WHEN LOADING/UNLOADING THE MACHINE ON TO A TRUCK/TRAILER. SUDDEN CHANGE OF THE MACHINE TRAVEL SPEED MAY CAUSE THE MACHINE TO ROLL OVER.

Select LOW (1st speed) when travelling on rough or soft terrains, on slopes, in narrow places, when powerful tractive force is required, or loading or unloading from a truck/trailer. See 6-4 for speed.

Select HIGH (2nd speed) when travelling on flat, hard grounds. The lamp turns on. See 6-4 for speed.

3. HORN SWITCH Depress the symbol of this switch on top of left control lever to sound the horn.

CAUTION Sound the horn before starting engine, travelling, slewing or operating the attachments.

4. TRAVEL SELECT SWITCH (OPTIONAL) The travel alarm switch is located on the right control panel.

When travel is engaged the alarm sounds automatically.

2-10

2. MACHINE FAMILIARIZATION 2.4.3

LEVERS AND PEDALS

1. SAFETY LOCK LEVERS 2. RIGHT/LEFT CONTROL LEVERS 3. TRAVEL LEVERS WITH PEDALS 4. THROTTLE LEVERS 5. CRAWLER WIDTH/DOZER SELECTOR LEVER 6. CRAWLER WIDTH/DOZER OPERATING LEVER 7. BOOM SWING OPERATING PEDAL 8. (OPTION PEDAL) NIBBLER AND BREAKER 9. SLEWING LOCK LEVER

1. CONTROLS SAFETY LOCK LEVER The safety lock lever is provided to lock all attachments and to prevent any unexpected machine movement, due to accidental shifting of control levers.

WARNING ALWAYS PLACE THE SAFETY LOCK LEVER IN THE “LOCKED” (UP) POSITION BEFORE LEAVING THE OPERATOR’S SEAT. NEVER LEAVE THE MACHINE UNATTENDED WITH ENGINE RUNNING OR WITH SAFETY LEVER “UNLOCKED” (DOWN).

NOTE THAT EVEN WHEN THE SAFETY LOCK LEVER IS “LOCKED” (UP), THE DOZER BLADE AND BOOM SWING ARE STILL ENABLED.

A

LOCKING HYDRAULIC SYSTEM “A” When the safety lock lever is “LOCKED” (up) the hydraulic system is disabled. Hydraulic system is disabled except for the boom swinging.

NOTE: •

•

When the safety lock lever is set to “LOCKED” (up) position, each attachment and swing motor is locked simultaneously even though each lever can be moved, because they are part of a hydraulic locking system. However, the travel levers are separately locked with their mechanical locking to prevent the movement of the levers themselves.

F26047

LOCKED POSITION (UP)

The safety lock lever is fitted only on the left side.

2-11

2. MACHINE FAMILIARIZATION

UNLOCKING HYDRAULIC SYSTEM “B” When the safety lock lever is set in “UNLOCKED” position (down) all hydraulic functions are again released.

UNLOCKED POSITION (DOWN) 2. CONTROL LEVERS (ISO PATTERN) These two levers activate each function as illustrated on the right.

WARNING •

•

CONFIRM FOR SAFETY AROUND THE WORKING AREA. ALSO ENSURE THAT EACH LEVER OPERATION IS IN ACCORDANCE WITH THE OPERATING PATTERN INDICATED ON THE LABELS. IF LABELS DO NOT MATCH THE OPERATOR’S CONTROL PATTERN, REPLACE THEM IMMEDIATELY TO AVOID ACCIDENTS AND/OR INJURY.

NOTE: the operator’s control levers return to neutral position when released, and the operation of attachment is stopped.

All functions can be activated simultaneously.

ISO OPERATING PATTERN •

ISO PATTERN

LEFT CONTROL LEVER RIGHT CONTROL LEVER 2 E ARM OUT F ARM IN 4 GSLEWING LEFT H SLEWING RIGHT

1 A BOOM DOWN B BOOM UP 3 C BUCKET IN D BUCKET OUT

2-12

2. MACHINE FAMILIARIZATION 3. TRAVEL CONTROL LEVERS

A

The travel levers are located in front of operator seat.

The travel levers are used to move forward and backward the left or right machine crawler.

C

A

B

WARNING

B

USE CAUTION TO AVOID COMING IN CONTACT WITH OTHER MACHINES WHILE TRAVELLING. BE SURE TO KNOW THE LOCATION OF THE TRAVEL MOTORS BEFORE OPERATING THE TRAVEL FUNCTION. When travel lever is activated, the relevant alarm sounds to warn people nearby the machine.

A

NOTE: the travel alarm function is optional.

CAUTION If the travel alarm does not sound after the travel lever is operated, stop the engine immediately and contact the nearest Dealer for repair.

Operation with a travel alarm failure may cause severe accidents resulting in injury or death.

B F26048

NOTE: the travel functions described below, are with the travel motors located behind the operator’s cab.

A. To travel forward (push both control levers forward at the same time).

B. To travel in reverse (pull both control levers back at the same time).

C. Neutral (release levers to central position to stop the travel function.)

1. Travel reverse 2. Travel forward 3. Control lever 4. Front 5. Rear NOTE: refer to 3-18 for changing travel direction.

2-13

2. MACHINE FAMILIARIZATION 4. THROTTLE LEVER The throttle control lever is located right of the operator’s seat and it is used to control the engine speed.

A. LO (Low Idle) By pushing this lever completely forward, engine is at low idle.

B. HI (High Idle) By pushing this lever completely backward, engine is at high idle.

5. ADJUSTABLE CRAWLER DOZER SELECTOR LEVER

FRAME

WIDTH/

This lever is located on the front lower side of the operator’s seat and it is used to select the dozer operation or adjust the crawler frame width. Usually, this lever is to be set to (C) position (dozer side). Only when changing the machine width (crawler frame width), this lever is to (D) position (crawler frame side) to allow the adjusting crawler frame width with the adjustable crawler frame width/dozer operating lever, by actuating cylinder.

C. Dozer side

DOZER BLADE OPERATION

D. Crawler side

2-14

2. MACHINE FAMILIARIZATION 6. CRAWLER FRAME WIDTH/DOZER CONTROL LEVER This lever is located on the right side of the operator’s right control panel and it is used to select the dozer operation or adjust the crawler frame width.

WARNING The crawler frame width/dozer function is at all times, even with the safety lock lever in the locked (up) position.

Do not touch the crawler frame width/dozer control lever unless one of these functions need to be activated.

DOZER OPERATION

DOZER BLADE OPERATION

This lever is to control the dozer (1) up or down function.

E. Dozer down (Push the lever forward) F. Dozer up (Pull the lever back) ADJUSTING CRAWLER FRAME WIDTH This lever is to change the machine width (crawler frame width).

G. Push the lever forward to narrow the width of the crawler frame: 990 mm (3’ 3.0”).

H. Pull the lever back to widen the width of crawler frame: 1320 mm (4’ 4.0”).

NOTE: it is recommended to operate the machine with wider width to make the machine more stable during operation. Use the narrower width only when the job site space is limited.

Refer to 3-26 for the procedures to change the machine width (crawler frame width).

7. BOOM SWING CONTROL PEDAL This pedal operates the swing motion of the boom.

WARNING LOCK OPTIONAL PEDAL IF THIS FUNCTION IS NOT USED. VERY SERIOUS ACCIDENTS MAY OCCUR, IF YOU PRESS ACCIDENTALLY THE UNLOCKED PEDAL. 1. By pushing pedal down and right “A” the right swing is operated.

2. By pushing pedal down and left “B” the left swing is operated.

NOTE: the pedal can be locked by pulling the cover (1) downwards.

2-15

2. MACHINE FAMILIARIZATION 8. PEDAL FOR OPTIONAL EQUIPMENT (breaker and nibbler) Use this pedal to operate optional equipment.

WARNING LOCK THE PEDAL IF ATTACHMENT IS NOT IN USE. CARELESS OPERATION OF THE UNLOCKED PEDAL MAY CAUSE SERIOUS ACCIDENTS. Refer to section 7. “OPTIONAL EQUIPMENT” for the operation of hydraulic breaker and nibbler.

Pedal locking device This device locks pedal controlling the optional equipment. The lock is released if relevant lock pin (1) of pedal is pushed forward.

1. Pedal lock pin A. Locked 9. SLEWING LOCK LEVER This lever is located on the front lower side of the operator’s seat, and it is used to lock the machine’s upper frame for transportation. The upper frame can be locked in two different positions, forward or backward.

A. LOCKED POSITION B. UNLOCKED POSITION NOTE: do not operate the slewing function when the upper frame is locked, damage to the machine could occur.

2-16

2. MACHINE FAMILIARIZATION 2.4.4

SEAT BELT

Fastening/Unfastening 1. Check if the belt is twisted. Insert the tongue of the buckle up to the end, until you hear a “click” (1).

2. Adjust the belt length so that there is no looseness (2).

3. Push down the red button on the buckle to unfasten the seat belt.

WARNING INSPECT SEAT BELTS DAILY. REPLACE SEAT BELT IF IT SHOWS SIGNS OF DEFORMATION OR DAMAGE. ALWAYS ENSURE THE SEAT BELT SUPPORT CAPSCREWS ARE PROPERLY TIGHTENED.

2-17

2. MACHINE FAMILIARIZATION 2.4.5

CAB (OPTION)

The following equipment are provided for the cab to ventilate or to facilitate operation.

WARNING AVOID UNEXPECTED MOVEMENT Set the safety lock lever to the locked position before setting/adjusting equipment in an operator cab/canopy. Unintentional movement of controls may cause injury or death.

A. LOCKING CAB DOOR To lock the door in the open position, push the door to the catch (1) on the rear of the cab.

B. UNLOCKING DOOR FROM INSIDE When unlocking the door from its opening position, push down the lever (1).

2-18

2. MACHINE FAMILIARIZATION C. STORING UPPER FRONT WINDOW The upper front window is able to slide into ceiling for storage.

WARNING AVOID INJURY To avoid injury from unexpected window movement open or close and lock the front window with the machine on level ground. Unlocking the window from the open position on a forward incline could cause the window to come down quickly and unexpectedly.

1. Move the machine to level ground, set the safety lock lever to lock position, then stop the engine.

2. Pull down the levers (1) provided on the left/right sides of upper portion to unlock the front windshield.

3. Grasp the handle on windshield, hold it up and slide into backside ceiling.

4. Ensure to lock the front windshield housed into ceiling by means of pushing up the lever (1).

5. Close the upper front windshield with the reverse order of the above steps [1] through [4].

WARNING AVOID INJURY To avoid injury to fingers and hands when closing the upper front window and lower it to closed position.

Make sure the window is securely locked when opened or closed.

D. STORING LOWER FRONT WINDOW After housing the upper front windshield, the lower front windshield is also able to remove.

1. Hold up the lower front windshield to remove it from the window frame.

2. Insert the lower front windshield into the rail lower portion of window frame to store.

2-19

2. MACHINE FAMILIARIZATION E. CAB LAMP Operate the cab lamp switch when required.

ON: The lamp is turned on.

OFF: The lamp is turned off.

F. RIGHT WINDOW OPERATION 1. To open, release the lock (1) and move the slide glass.

2. Close the window by returning the slide glass to the normal position and lock it.

G. WINDOW WASHER TANK The washer tank is installed on the right rear of cab.

1. Check the washer tank (1) fluid level.

2. When the fluid level becomes low, remove the cap (2) and fill with washer fluid.

1. WASHER TANK 2. CAP 3. MOTOR

2-20

2. MACHINE FAMILIARIZATION 2.4.6

GUARD WITH LOCKING DEVICE AND COVERS

WARNING STOP THE ENGINE WHEN THE ENGINE DOOR OR RADIATOR COVER IS OPENED. A lock is provided for the engine doors. Use the key to open and close engine doors.

A. OPENING 1. Insert the key.

2. After releasing the lock, remove the key and open the cover (engine door).

3. Secure the cover in the open position with the rod.

B. LOCKING 1. Return the rod to the storage position by placing it into the holder. (engine door) 2. Close the cover.

3. Insert the key, and turn it C.C.W. direction to lock the cover. Then remove the key.

1. KEY CYLINDER 2. BONNET (ENGINE DOOR) 3. SERVICE COVER (FUEL CAP) 4. BOX (OPERATOR’S MANUAL) Insert the key completely for proper operation; otherwise damage may occur to the key or locking mechanism.

NOTE: secure the engine doors in the open position when servicing using the rods provided.

WARNING SECURE THE ENGINE DOORS IN THE OPEN POSITION WHEN SERVICING USING THE RODS PROVIDED.

2-21

2. MACHINE FAMILIARIZATION 2.4.7

ELECTRICAL EQUIPMENT

A. WORKING LIGHTS A work lamp is provided on the boom for work at night, etc.

B. FUSE BOX (Main)

WARNING MAKE SURE THE STARTER SWITCH IS IN THE “OFF” POSITION WHEN REPLACING FUSES. The fuses protect the electrical system from excess current. If operation is not normal, a fuse may be blown.

Replace blown or faulty fuses with the spare fuses as follows.

Replace any fuse generating white powder on it or in case that some looseness exists between the fuse and fuse holder.

•

When replacing a fuse, replace it with one of the same capacity.

•

The spare fuses are stored in the back side of fuse box cover.

No. AMPS

FUNCTION

1

30A WIPER, HEATER

2

20A RELAY, SOLENOID

3

30A WORKING LIGHT

4

10A HORN, ROOM LAMP

5

30A ENGINE STOP

6

10A BATTERY RELAY, GAUGE CLUSTER, ENGINE STOP

2-22

2. MACHINE FAMILIARIZATION C. FUSIBLE LINK (For starter) If electrical power does not come on when the starter key switch is in the on position, the fusible link may be the cause.

Inspect and replace the fusible link.

1. FUSIBLE LINK (RED) A fusible link is used in the wiring system. It protects the electric system from current overload. The fusible link functions like a fuse.

D. SOCKET OF 12 V POWER SOURCE Open the cap and connect the socket for the car accessories.

2.4.8

SEAT ADJUSTMENT

1. Pull the seat adjustment lever to the right.

2. Move the seat forward or backward to desired position.

3. Release the lever to lock the seat in position.

2-23

2. MACHINE FAMILIARIZATION 2.4.9

STORAGE BOX AND OTHERS

A. STORAGE BOX FOR MANUAL Store the manual in the storage box provided on the back of seat.

B. TOOLS Use the standard tools supplied with the machine for maintenance work.

Refer to 4-13 for details on the tools.

2-24

3. BASIC MACHINE OPERATION

3-1

3. BASIC MACHINE OPERATION

3-2

3. BASIC MACHINE OPERATION

3.1

BASIC MACHINE OPERATION

3.1.1

PRE-START CHECK

A. DAILY CHECK Before starting the engine, walk around the machine to check for any loose nuts and capscrews, any oil, fuel or coolant leaks. Check also the condition of attachment and hydraulic system. Check for any looseness in the electrical wiring and for any accumulated material (leaves, dirt, etc.).

NOTE: the daily inspection must be carried out in accordance with the instructions provided in this MANUAL.

5

7 6

2

4 3

1

1. Check the engine for any oil, fuel or coolant leakage. Repair as required.

2. Check the area around the engine and radiator for any accumulated material and remove as required.

3. Check the hydraulic equipment, hydraulic oil tank, hoses, and joints for oil leakage, and repair as required.

4. Check the travel system, such as the crawlers, idlers, and sprockets, for any damage or wear, and the capscrews for looseness.

5. Check the attachments, cylinders, linkages and hoses for any cracks, wear or looseness and repair as required.

6. Check the guards, steps and handrails for damage, and the capscrews for looseness.

Repair and tighten capscrews as required.

7. Verify that the gauges and the monitor panel (gauge cluster) function properly.

3-3

3. BASIC MACHINE OPERATION 3.1.2

CHECKS BEFORE ENGINE START-UP

The following items should be inspected before starting machine operation: A. CHECK COOLANT LEVEL

WARNING NEVER REMOVE RADIATOR CAP WHEN ENGINE IS HOT. WAIT UNTIL THE ENGINE HAS COOLED DOWN, BEFORE REMOVING THE RADIATOR CAP. The radiator (3) expansion tank (4) is provided on the right side of the engine compartment.

1. Check the coolant level with cold engine.

2. Open radiator expansion tank. Proper coolant level is between marks “FULL” and “LOW” visible from the expansion tank.

NOTE: engine coolant level is higher than normal when the engine is warm. The coolant level lowers with engine temperature.

Maintain coolant level at full mark when the engine is cold. See 4-10 for engine coolant specifications.

3. Open cap (1) of expansion tank (4), fill with proper coolant up to “LOW” mark of expansion tank.

Check radiator coolant level when its level in the expansion tank lowers below the “LOW” mark. Make sure to check the engine cooling system for leakages and repair as needed, before resuming operation.

4. See 4-30 for reference. Remove the radiator cap (2), and check for proper coolant level.

5. Top up with suitable coolant up to “FULL” mark.

6. Install radiator cap (2) and tighten securely.

WARNING BE CAUTIOUS OF HOT FLUIDS AND SURFACES. WEAR GOGGLES, SAFETY SHOES, HARD HAT, WORK CLOTHES AND WORK GLOVES TO PERFORM INSPECTION AND MAINTENANCE ON THIS MACHINE.

B. CHECK COOLANT LEAKS If the coolant level in the radiator expansion tank does not lower, but the coolant inside the radiator does, there is a possibility of air leakage in the cooling system.

Make sure coolant level is to specifications and pressurize system to check for leakages. Address to a Dealer for suggestions and/or repairs. Be sure to repair leakages before resuming operation.

3-4

3. BASIC MACHINE OPERATION C. CHECK AND RESTORE ENGINE OIL LEVEL NOTE: •

Make sure the machine is on firm and level ground, when checking oil level.

•

Always check engine oil level before starting the engine.

•

Keep the engine switched off for at least 30 minutes after use, to check the engine oil level.

1. Bring throttle control lever to minimum speed, stop the engine and remove starter key, then position safety lock lever on “LOCK”.

2. Wait until the machine is cold.

3. Use the starter key to unlock and open engine cover.

4. Pull out engine oil dipstick (1), clean it with a dry cloth and re-insert it completely. Pull it out again and check oil level. The level must be between marks “H” and “L”.

If the oil is heavily contaminated or deteriorated, change it regardless of periodical schedule.

See 4-10 for oil specifications.

5. If oil level is too low, remove filling plug (2) and restore level by pouring oil through filler neck.

Make sure to check the oil level again after refilling.

6. Clean engine oil filler cap (2), before installing.

7. Close the engine cover and use key to lock it properly.

D. CHECK HYDRAULIC OIL LEVEL

WARNING NEVER CHANGE OILS OR FILTERS ON A MACHINE THAT HAS JUST FINISHED WORKING. THEREFORE STOP THE MACHINE AND LET IT COOL DOWN BEFORE STARTING ANY INSPECTION: DANGER OF SCALDS. RELEASE HYDRAULIC OIL TANK PRESSURE, BEFORE ANY INTERVENTION ON THE PRESSURIZED SYSTEM. DANGER OF PERSONAL INJURIES.

3-5

3. BASIC MACHINE OPERATION D1. CHECK PROCEDURE 1. Move the machine to firm level ground and set it in the hydraulic oil level check position, as shown in figure.

2. Check the oil level through sight level gauge provided on the side of the hydraulic tank. Hydraulic oil level should be between H and L. Oil level varies depending on oil temperature.

Check the oil level. (Reference only) Before starting: “L” level [oil temp. 10 ~ 30 °C (50 ~ 86 °F)] Normal operation: “H” level [oil temp. 50 ~ 80 °C (122 ~ 176 °F)] NOTE: avoid overfilling. It causes damages to hydraulic system or oil spilling.

D.2 REFILL WITH OIL WHEN THE LEVEL IS BELOW “L” Refer to 4-10 for the recommended oil to be used.

1. Remove the left side cover (3).

2. Release the internal pressure of the tank according to the item “RELEASING INTERNAL PRESSURE FROM THE HYDRAULIC SYSTEM”, 4-18.

1. CAP 2. LEVEL GAUGE A. PROPER LEVEL 3. Remove the cap (1) after the machine has cooled down to touchable with a bare hand. Slowly loosen the cap (1) to release the inside pressure. Remove the cap (1) after all pressure is released.

4. Check the cap (1) for damages or adhesion of dust.

Clean it and/or replace it if needed.

5. Securely tighten the cap (1).

6. Start the engine and run it for 5 to 7 minuets at low idling speed. Operate each cylinder though its full travel and the slewing operation to remove any air from the hydraulic system.

Return the machine to the hydraulic oil level check position.

7. Stop the engine and check the oil level and add oil as necessary.

8. Return the left side cover to the normal position.

3-6

3. BASIC MACHINE OPERATION E. CHECK FUEL LEVEL

WARNING • •

•

MAKE SURE TO USE DIESEL FUEL ONLY AND STOP ENGINE BEFORE REFUELLING. BE CAREFUL FUEL DOES NOT OVERFLOW WHEN REFILLING. CLEAN UP ALL SPILLED FUEL TO PREVENT FIRE. DISPOSE OF HAZARDOUS WASTE ACCORDING TO ENVIRONMENTAL LAWS AND REGULATIONS.

1. STARTER KEY SWITCH 2. FUEL METER 3. FUEL CAP 4. STRAINER 5. DRAIN PLUG 6. FUEL TANK 1. Turn starter key switch (1) to “ON” position to illuminate the monitor panel and activate the fuel gauge.

2. Check the fuel gauge (2), and remove filler cap (3) to refuel if needed.

3. Refer to 4-10 for fuel specifications.

Fuel tank capacity: 22 litres (5.8 gal) 4. Do not remove fuel tank strainer (4) for refilling to avoid contamination.

5. After refuelling, install fuel cap (3) and tighten securely.

Close the engine door and use key to lock it properly.

We recommend to refuel at the end of the work shift.

Refuelling should be done to full mark to reduce air volume (condensation). Failure to do so could create problems such as rusting and fuel freezing, as well as other associated problems.

3-7

3. BASIC MACHINE OPERATION F. CHECK FOR FUEL LEAKS Check and repair any fuel leakage. Do not operate a machine leaking fuel. Fuel leaks can be caused by a faulty drain plug, by cracks in the hoses or by loose hose clamps.

Make sure to stop engine immediately after detection of a fuel leak. Repair fuel leak before resuming operation.

1. FUEL TANK 2. FUEL FILTER 3. WATER SEPARATOR 4. FUEL HOSE

G. INSPECT BELT CONDITION

WARNING ROTATING PARTS CAN CAUSE PERSONAL INJURY. KEEP AWAY FROM FAN AND BELT WHEN ENGINE IS RUNNING. MAKE SURE TO STOP ENGINE BEFORE SERVICING.

Check the fan belt for insufficient tension, wear, and damage. Insufficient belt tension may cause battery charge failure, engine overheating, or abnormal belt wear. Likewise, if too much tension is applied to the belt, the bearings or belt may be damaged prematurely.

Apply a force of 98 N (22 lb) to the centre of belt between pulleys, and measure the belt deflection. The table below shows normal condition.

Belt deflection: 8 ~ 10 mm (0.31 ~ 0.39 in) See the section “250-HOUR (3–MONTH) INSPECTION AND MAINTENANCE” for details on the inspection and adjustment procedure for the fan belt.

1. MOUNTING/PIVOT BOLT 2. ADJUSTING BOLT 3. ADJUSTING BOLT

3-8

3. BASIC MACHINE OPERATION 3.1.3

CONFIRMATION BEFORE STARTING ENGINE

A. CHECK WARNING LAMPS

WARNING CARELESS MOVEMENT OF ANY OPERATING LEVER MAY CAUSE SUDDEN MOVEMENT OF THE MACHINE. BE SURE TO SET THE SAFETY LOCK LEVER TO THE “LOCKED” (UP) POSITION BEFORE LEAVING THE CAB. BLADE AND BOOM OPERATION ARE STILL ACTIVES, EVEN IF SAFETY LOCK LEVER IS LOCKED (UP).

Before starting the engine, check if warning lamps turn on correctly: RED: Warning lamps

1. Make sure the safety lock lever is in the “LOCKED” (up) position.

YELLOW: Indication lamp Operation key HEATING ->OFF Pre-heating

2. Make sure all control levers are in the “NEUTRAL” position.

Lamp 1 Glow lamp Battery charge 2 lamp Engine oil pres3 sure lamp Engine coolant 4 temperature lamp 2nd Speed travel 5 lamp Air cleaner clog6 ging lamp

3. Use the starter key and the table (as reference) to check all warning lamps and indicators for proper functioning.

4. Do not operate machine, if alarm lamps are lit. If necessary address to authorized Dealer and make sure that all lamps work correctly. Repair any malfunctioning before resuming operation.

NOTE: make sure that all warning lamps and indicators operate properly, before starting the machine.

B. CHECK FOR WORKING LIGHT With the key position in the starter switch in “ON” position, turn on the working light switch so as to check if it operates correctly.

If light does not turn on, presumably the bulb is burnt out or an electric fault is occurred.

For fuse information, see page 2-22 and 4-31.

For work lamp replacement, see page 2-22 and 4-31.

3-9

OFF -> ON Before start

START - > ON Just after start

Lamp ON

Lamp ON

Lamp OFF

Lamp OFF

Lamp ON

Lamp OFF

Lamp OFF

Lamp ON

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

Lamp OFF

3. BASIC MACHINE OPERATION 3.1.4

ENGINE START

A. START-UP UNDER NORMAL CONDITIONS 1. Make sure that safety lock lever (1) is set to “LOCKED” position “A”.

2. Make sure all control levers are set to the “NEUTRAL” position.

3. Slightly move the throttle control lever (2) from the low idling position.

4. Turn the starter key switch (3) to the START position to start the engine and release after starting the engine.

Release the starter key switch (3) immediately after the engine starts.

The starter key switch will return to the “ON” position by itself.

WARNING MAKE SURE SWING AREA IS CLEAR OF PERSONS AND OBSTACLES BEFORE OPERATING THE ENGINE. ENSURE THE POSITION OF THE TRAVEL MOTORS, BEFORE STARTING TO TRAVEL AND SOUND THE HORN BEFORE BEGINNING THE WORK.

NOTE: •

Do not set the engine speed to high idle with cold engine.

•

Do not hold the starter key switch in the START position for more than 15 seconds. If the engine does not start, return the starter key switch to the OFF position, wait 30 seconds, and then try again.

3-10

3. BASIC MACHINE OPERATION B. START-UP WITH COLD WEATHER With cold weather, due to the increase of oil viscosity and the decrease of battery charge, starting the engine may be difficult. Use the pre-heater to start the engine easily under these conditions.

1. Perform steps 1 to 3 mentioned in “START-UP UNDER NORMAL CONDITIONS” shown on the previous page.

2. Turn starter key (1) on “HEAT” and keep it in this position for 15 seconds so that the engine can warmup.

3. Turn key to “START” position to start the engine.

A. HEAT START B. ENGINE START

CAUTION Do not hold the starter key on “START” for more than 15 seconds. If the engine does not start, turn the key to “OFF”, wait 30 seconds, and then try to re-start.

4. Release key immediately after the engine start. The key will return to “ON” position by itself.

3-11

3. BASIC MACHINE OPERATION C. EMERGENCY START-UP WITH BOOSTER CABLES Observe the following precautions when using booster cables to start the engine.

WARNING •

•

•

•

•

•

•

EXPLOSIVE GAS, EASY FLAMMABLE IS GENERATED BY THE BATTERY. DO NOT APPROACH THE CHARGING AREA WITH SPARKS OR NAKED FLAMES TO AVOID FIRES AND AN EXPLOSION. DO NOT ALLOW THE VEHICLE OR MACHINE USED FOR BOOSTING TO TOUCH METAL TO METAL WITH THE DISABLED MACHINE. WEAR SAFETY GLASSES OR FACE PROTECTION, GLOVES AND OTHER SAFETY CLOTHING WHEN WORKING WITH BATTERIES. NEVER ALLOW THE BOOSTER CABLE CLIPS TO COME IN CONTACT WITH EACH OTHER ONCE CONNECTED TO A BATTERY. THE NEGATIVE CABLE, WHEN CONNECTED TO THE UPPER FRAME OF DISABLED MACHINE, MAY ARC, CAUSING SPARKS. MAKE SURE TO CONNECT THE BOOSTER CABLE TO A GROUND SURFACE IN THE ENGINE COMPARTMENT, AS FAR AS POSSIBLE FROM THE BATTERY. WHEN THE BATTERY FLUID IS FROZEN, DO NOT START UP THE ENGINE WITH ANOTHER POWER SOURCE. FOLLOW THE ORDER INDICATED IN THE NEXT PAGE FOR CONNECTING OR DISCONNECTING THE BOOSTER CABLES.

NOTE: select booster cables and terminals with suitable sizes, according to batteries dimensions.

Use the booster cables and clips without any signs of damage or corrosion.

3-12

3. BASIC MACHINE OPERATION D. CONNECTING/DISCONNECTING BOOSTER CABLES Make sure the starter key is on “OFF”, before connecting the booster cables. Connect booster cables as per following sequence.

1. BATTERY COVER 2. BATTERY

WARNING •

•

ERRONEOUS CONNECTION OF BOOSTER CABLES MAY CAUSE EXPLOSION OF THE BATTERY. PAY SPECIAL ATTENTION WHEN CONNECTING AND DISCONNECTING THE BOOSTER CABLES. THE ELECTRICAL SYSTEM OF THIS MACHINE WORKS WITH 12 V DC.

1. Set the starter key switch to “OFF” for both boost vehicle and disabled machine.

2. Refer to 2-17 and remove the left side cover. Then open the cover under the operator’s seat.

3. Remove the cover (1) from the battery terminals.

4. Connect the booster cable (red) terminal to the positive (+) terminal on the battery of the disabled machine.

5. Connect the other terminal of the positive cable (+)(red) to the positive terminal (+) of the battery of the normal vehicle.

6. Connect the terminal of the booster cable (black) to the negative terminal (–) of the battery of the normal vehicle.

7. Finally, connect the other terminal of the negative booster cable (–) (black) to the upper frame of the disabled machine, away from the battery.

8. Start the engine of the normal vehicle, and operate it for around 10 minutes at high idling.

9. Start the engine of the disabled machine.

10. After starting the engine of the disabled machine, disconnect the booster cables exactly in the reverse order.

(A) Booster battery

11. Make sure to check and repair the cause of the problem of the charging system on the disabled machine.

(D) Black cable

(B) Discharged battery (C) Red cable (E) To the upper frame of the troubled machine Cable connecting order: 1>2>3>4 Cable disconnecting order: 4>3>2>1

3-13

3. BASIC MACHINE OPERATION 3.1.5

STOPPING MACHINE ENGINE

Let the engine run idle for at least 5 minutes before shut down, to keep it in good condition.

CAUTION If the engine stop is abrupt, while it is running at high speed, the engine temperature increases rapidly. As a consequence, the engine oil is overheated and the joints jam.

1. Place the attachment on the ground before stopping the engine.

2. Place the safety lock lever in the “LOCKED” (up) position before leaving the cab.

LOW IDLING POSITION 3. Push the throttle lever (1) all the way forward to low speed position for 5 minutes to lower the coolant temperature.

4. Turn the starter key (2) to “OFF” to stop the engine.

5. Remove the starter key (2).

3.1.6

INSPECTION AFTER STARTING ENGINE

Check and ensure the following items after starting the engine.

WARNING •

Careless movement of any control levers may cause unexpected movement of the machine. Set the safety lock lever to the “locked” (up) position before leaving the cab.

•

Make sure the swing area of machine is clear of people and obstacles before operating. Know the position of the travel motors before starting traveling and sound horn before starting operation.

NOTE: •

Do not apply any heavy load on the new engine for the first 50 hours operation.

•

Confirm the LIGHT-OFF for each warning lamp.

•

Carefully listen for any abnormal sound.

•

Check for leakages for oil and water around the engine.

•

At the first engine start-up of the day, operate the engine for around 5 minutes with no load to warm up the engine and circulate oil to every part of the engine.

3-14

3. BASIC MACHINE OPERATION A. EXHAUST GAS COLOUR, IRREGULAR NOISES AND SMELLS With engine running, check following: 1. Check for abnormal exhaust colour.

If the engine exhaust is black, stop the machine immediately. Black exhaust is an indication of an excessively rich fuel/air mixture. Check and service the engine accordingly if this condition is present.

2. Stop operation immediately when any abnormal sound is heard during the machine operation.

Check the cause of the abnormal sound, and repair as needed.

3. Avoid operation at the speed range with resonance.

There may be a certain rotating speed range at which the vibration suddenly becomes large due to resonance. Avoid the operation at such speed range, because some parts may be damaged due to vibration.

4. If burning smell or smoke is generated, stop the engine immediately. Check for any abnormalities and repair as needed before resuming operation.

NOTE: if faults are detected after the above mentioned checks, address to an authorized Dealer for repairs.

B. CHECK EACH SWITCH AND LEVER After warming up the engine, check for the following items.

NOTE: Appropriate operation temperature range for hydraulic oil is 50 to 80 °C (122 to 176 °F).

Avoid machine operation when the hydraulic oil temperature is below 20 °C (68 °F). Failure to do so will reduce the life of the hydraulic components.

SAFETY LOCK LEVER CONTROLS 1. When the engine is running, set the safety control lever on “LOCKED” position (up).

2. Move all control levers.

3. Make sure that all functions, do not operate when the safety control lever is in “LOCKED” (up) position.

4. The travel control levers have to be mechanically locked and do not have to move at all.

WARNING IF A FAULT IS FOUND, STOP THE ENGINE IMMEDIATELY AND TAKE NECESSARY MEASURES, ADDRESS TO AN AUTHORIZED DEALER FOR REPAIR.

NOTE: Boom swing function is not locked.

3-15

3. BASIC MACHINE OPERATION C. CHECK GAUGE CLUSTER Check all gauges and indicators on the gauge cluster after starting the engine. The red battery charge indicator will light if not charging. Check electrical system.

The red indicator (2) will light when engine oil pressure is low. Confirm that engine temperature gauge (3) and fuel level gauge (4) work properly.

3-16

3. BASIC MACHINE OPERATION 3.1.7

MACHINE WARM UP

A. WARM-UP

WARNING • •

AVOID RAPID SPEED INCREASE WITH COLD ENGINE. DO NOT RUN THE ENGINE IDLE FOR MORE THAN 20 MINUTES. EXTENDED PERIODS OF IDLING REDUCE THE LIFE OF THE ENGINE.

Set the throttle lever (1) to intermediate position, between low and high idle. Let the engine run idle for at least 5 minutes.

B. WARMING UP HYDRAULIC OIL SYSTEM

WARNING IN EXTREMELY COLD CLIMATES IT MAY BE NECESSARY TO INCREASE THE WARM-UP TIME TO ENSURE PROPER AND SAFE OPERATION. WHEN OPERATING THE MACHINE WITH COLD HYDRAULIC OIL, THE OPERATOR MAY EXPERIENCE SLOW OR UNEXPECTED MOVEMENT OF FUNCTIONS. LIKEWISE, COLD HYDRAULIC OIL WILL NOT PROVIDE ADEQUATE LUBRICATION TO HYDRAULIC COMPONENTS; THUS, REDUCING THE LIFE EXPECTANCY OF THE MACHINE. The temperature range of hydraulic oil must be between 50 °C and 80 °C (122 to 176 °F).

Avoid machine operation when the hydraulic oil temperature is below 20 °C (68 °F).

Failure to do so will reduce the life of the hydraulic components.

1. After correct engine warm-up, as previously described, position throttle lever (1) on “INTERMEDIATE SPEED”.

2. Set the safety lock lever (3) in the “UNLOCKED” position (down).

3. Operate the boom control lever (2) to raise it all the way up.

4. Operate the bucket control lever to retract it or extend it completely. Hold in this position for one minute, then release lever (2) and wait for another minute before repeating operation. Repeat this operation for at least 10 times, until the oil temperature in the pilot hydraulic circuit warms up for oil operation.

5. After hydraulic oil warm up, slowly extend and retract slowly all cylinders several times. Start the travel and slew motors, to complete the warm-up operation.

3-17

INTERMEDIATE SPEED POSITION

3. BASIC MACHINE OPERATION 3.1.8

MACHINE OPERATION

The following instructions are aimed to provide the operator with the basic functions of each hydraulic control. To follow the instructions and to practice them, will allow the operator to become more skilful in the operation of this equipment. Read, understand and follow all safety precautions and operation procedures found in this manual before operating the machine or any attachment.

A. TRAVEL

WARNING MAKE SURE SWING AREA IS CLEAR OF PERSONS AND OBSTACLES BEFORE OPERATING THE ENGINE. ENSURE THE POSITION OF THE TRAVEL MOTORS, BEFORE STARTING TO TRAVEL AND SOUND THE HORN BEFORE BEGINNING THE WORK. IF ANY ABNORMALITY IS FOUND DURING THE MACHINE OPERATION, IMMEDIATELY STOP WORKING. MAKE SURE TO REPAIR ANY FAULTY CONDITION BEFORE RESUMING OPERATION. NORMAL POSITIONING OF THE MACHINE, FOR THE PURPOSE OF DETERMINING FRONT, REAR, FORWARD AND REVERSE, IS WITH THE TRAVEL MOTORS LOCATED BEHIND THE OPERATOR’S CAB. A.1 FORWARD/REVERSE TRAVEL 1. Make sure the safety lock lever (1) is in the “UNLOCKED” position (down). Operate the boom, arm, and bucket control levers to raise the attachments from the ground.

2. Operate the control lever to raise the dozer blade.

3. To move the machine forward, push both (right and left) travel levers forward simultaneously (2). To move the machine in reverse, pull back both travel levers simultaneously (3).

Travel speed changes depending on how far you push or pull the levers.

A.2 RIGHT TURN •

Push the left travel lever forward (1) to turn the machine RIGHT.

•

Push the right travel lever forward (1) to turn machine LEFT.

•

Pull the left travel lever back to turn machine LEFT in reverse.

•

Pull the right travel lever back to turn machine RIGHT in reverse.

3-18

3. BASIC MACHINE OPERATION A.3 COUNTERCLOCKWISE ROTATION To counter rotate machine to the left, pull left travel lever back (2) and push right travel lever forward (1).

To counter rotate machine to the right, pull right travel lever back (2) and push left travel lever forward (1).

A.4 SHIFTING FROM ONE TRAVEL SPEED TO THE OTHER 1. For an “HIGH” travel speed (2nd), press and release the button on the right travel lever grip. The “hare” indicator (1) will illuminate on the gauge cluster.

2. Start the machine travel by operating the travel levers.

3. To return to “SLOW” translation speed (1st), stop translation, press and release the relevant switch.

NOTE: the travel speed is always reset to “SLOW” each time the starter key is turned to “OFF”.

B. STOP TRAVELLING

WARNING OPERATING THE ATTACHMENT OR SLEWING IS NOT RECOMMENDED WHILE TRAVELLING. IF NECESSARY, OPERATE THE ATTACHMENT OR SLEWING FUNCTION SLOWLY. Put the travel levers, left and right, in neutral position to stop the machine travel. Avoid stopping the machine travel suddenly. Stop the machine travel as slowly as possible.

STOP TRAVELLING

3-19

3. BASIC MACHINE OPERATION C. TRAVEL PRECAUTIONS

WARNING • •

USE A FLAG MAN WHEN TRAVELLING ON A ROAD SHOULDER OR IN CONFINED AREAS. KEEP PEOPLE AWAY FROM LIFTED DEVICES, TO AVOID POSSIBLE INJURIES.

1. Make certain the travel motor (1) location is known before performing any travel operation. Travel with travel motors at the back of the machine for long distance travel.

CONDITION WHERE THE TRAVEL DIRECTION IS REVERSED 2. Travel on flat and firm ground and in straight lines (or large angles) as much as possible. When turning the machine, move forward and backward alternately as much as possible instead of making a sharp turn.

3. Check the strength of bridges and road shoulders.

Reinforce them if necessary.

4. Maintain sufficient safety distance from bridges or electrical power lines.

5. When travelling on rough ground, use low speed (1st) “A” to reduce vibrations.

6. Do not allow large or heavy objects to strike against travel motors (1). Likewise, do not travel over large objects such as boulders, rocks, etc.

7. On a snowy or icy roads, travel at slow speed.

Avoid starting or stopping abruptly and avoid turning the superstructure suddenly.

8. For loading/unloading during transport, remove any mud clogged in the crawler to prevent the machine from side skidding on the ramps. Refer to 5-3 for the use of ramps, etc.

(A) Low (1st) speed (B) Low idling position

3-20

3. BASIC MACHINE OPERATION D. OPERATION ON A SLOPE

WARNING •

•

• •

• •

Do not change travel direction while travelling on or crossing a slope. The machine may roll over.

Move the machine to a level area and proceed.

Then travel up the slope to the new location.

Raise the bucket 30 to 40 cm (12 ~ 16 in) above the ground level, while travelling. And do not travel down the slope in reverse.

If the machine starts to skid, immediately lower the bucket and apply the brake.

Slewing the machine on a slope may cause a roll over due to loss of balance. It is dangerous to slew to the downhill side of the slope with a full bucket. When working on a slope is unavoidable level, an area on the slope to avoid the machine roll over.

Do not travel on a slope of more than 30° gradient.

When parking on a slope is unavoidable, lower the bucket/attachment to the ground and block the crawler belts.

1. The maximum gradeability of the machine is 58% [30°].

2. While moving down slope, slowly operate the travel levers.

3. Travel on the slope in low speed. (1st speed) 4. When travelling on a slope, keep the bucket height at 30 to 40 cm (12 to 16 in) above ground level and travel in low speed.

ON UP/DOWN SLOPE

3-21

3. BASIC MACHINE OPERATION 5. If the engine stalls on a slope, place the bucket/attachment on the ground, and make sure each operating lever is in the neutral position. Then start the engine again.

6. If it is difficult to climb a slope with the travel motor due to skidding crawlers, etc., the power of the arm can be utilized to pull up the machine with the bucket engaged on the ground.

WARNING • •

• • •

Always park the machine on a hard level, surface.

When parking on a slope is unavoidable, position the machine as shown in the figure. Block the crawler belt/crawler (1), dig bucket teeth into ground (2), lower dozer blade to the ground (3).

This will help prevent machine movement.

Set the safety lock lever to the “locked” (up) position to avoid any unexpected machine movement.

Stop the engine before leaving the cab/canopy.

If the machine to be parked on a road way, move the machine to the shoulder to allow passing of traffic. Also post reflective warning signs and markers at a distance from the machine to safely warn motorists. Refer to local code and regulations regarding the posting of work area warnings and markers.

7. When parking the machine on a slope, even if it is a short time of period, place all attachment on ground, place each operating lever in the neutral position, set the safety lock lever to the “LOCKED” (up) position and block the crawler belts/crawlers.

1. BUCKET 2. DOZER BLADE 3. BLOCK

NOTE: When the hydraulic oil is not warmed up sufficiently, the machine may not be able to deliver its full performance. Make sure the machine is sufficiently warmed up before climbing a slope.

3-22

3. BASIC MACHINE OPERATION E. MACHINE OPERATION IN WATER/ON SOFT GROUNDS NOTE: the slewing bearing, slewing pinion and swivel joint should never operate in water or mud.

If the machine is operated in water or mud, the slewing bearing and others may be worn abnormally. If water or mud comes up to the slewing bearing level, put grease in slewing bearing unit the old grease comes out. If water or mud goes higher than the upper frame level, contact the dealer/distributor for cleaning or repair.

1. UPPER ROLLER 2. SLEWING BEARING 3. WATER SURFACE 4. BOTTOM OF A RIVER 1. Where a bottom is flat and water flow is slow, the machine may be operated in a water-depth (A) to the upper roller.

2. Operate the machine in water with care. Use the bucket to check for soft conditions at the bottom of river.

3. After operating in seawater, thoroughly wash the machine to remove salt.

4. Lubricate bucket pins and bushing every 4 hours if working with materials in wet conditions, grease parts with a grease gun until grease comes out.

F. MACHINE OPERATION ON SOFT GROUND 1. When operating on a soft ground, the machine may sink. Pay attention to the condition of the ground at all times while operation to avoid getting the machine stuck.

GREASING POINTS

3-23

3. BASIC MACHINE OPERATION G. GETTING OUT OF SOFT GROUND

WARNING Attempting to free a machine that is stuck can be hazardous. Avoid operating on soft ground. The machine operator must be careful to avoid injury to himself and others while attempting to free the machine.

If possible, avoid travelling on soft ground. Avoid getting caught in the mud. In the event that the machine gets caught in the mud, get out of it as follows.

G.1 ONE CRAWLER GETS CAUGHT IN MUD When a crawler gets caught in mud, lay logs or boards on the mud to form a base. Operate boom and arm to form an angle between them of about 90° ~ 110°. Push outer side of bucket against the ground to lift the machine body.

G.2 BOTH CRAWLERS GET CAUGHT IN MUD When both crawlers get caught in mud and the machine does not move because it skids, provide logs and boards, as described in the previous step and anchor the bucket firmly to the ground so that you can help the machine to come out from mud.

If the machine is unable to travel because the crawlers are stuck in mud, sand or gravel on soft ground, raise each crawler alternatively by pushing the boom and arm against the ground and by scraping off mud, sand or gravel. Gravel and mud may be cleared off by rotating the raised crawler back and forth.

CAUTION Operate the machine from operator’s seat only. Do not allow any person to come near the machine.

3-24

3. BASIC MACHINE OPERATION H. SUPERSTRUCTURE SLEW

WARNING • •

• • •

• •

WHEN YOU WORK ON SLOPES THE MACHINE BECOMES UNSTABLE AND UNBALANCED. MAKE SURE THAT THE SWING AREA IS CLEAR OF PERSONS AND OBSTACLES BEFORE OPERATING THE ENGINE. WORK UP AND DOWN INCLINES OR SLOPES, NEVER ACROSS. NEVER SLEW OR TURN MACHINE AROUND ON SLOPES. OPERATE CONTROL LEVERS CAREFULLY TO PREVENT SUDDEN MOVEMENTS THAT MAY CAUSE THE MACHINE TO SLIP OR TIP OVER. PREPARE A LEVEL AREA FOR THE MACHINE TO OPERATE. USE A FLAG MAN TO GUIDE THE OPERATOR. 1. LEFT CONTROL LEVER A. RIGHT SWING B. LEFT SWING

3-25

3. BASIC MACHINE OPERATION I. CHANGING MACHINE WIDTH (CRAWLER FRAME WIDTH) Change the machine width on a flat and hard ground without any obstacles.

Make sure to lift the machine body up to change the crawler width. Otherwise the crawler frame and width adjusting cylinder may be damaged.

1. Lift up the machine body as shown in the sketch.

2. Set the crawler/dozer shifting lever to (A) position (crawler frame width side).

3. Expanding Move the adjustable crawler frame width/dozer lever to (B) position (crawler frame width expansion) to expand the machine width (crawler frame width).

4. Retracting Move the adjustable crawler frame width/dozer lever to (C) position (crawler frame width retracting) to contract the machine width (crawler frame width).

A.2 USING THE DOZER 1. The dozer is used to push the soil back into the ditch, or for ground levelling.

2. Scrape the soil laid on the ground at its upper or side face with the dozer.

Use the dozer blade to backfill the trench.

Adjust the height of dozer with the dozer control lever to avoid overloading the engine.

3-26

3. BASIC MACHINE OPERATION 3.1.9

PRACTICE TO IMPROVE EFFICIENCY

WARNING •

•

SLEWING THE SUPERSTRUCTURE ON A SLOPE MAY CAUSE THE MACHINE OVERTURNING. DO NOT SLEW THE SUPERSTRUCTURE DOWN A SLOPE WITH A FULL BUCKET. PREPARE A LEVEL AREA FOR THE MACHINE TO OPERATE SAFELY. MAKE SURE THAT THE SLEWING AREA IS CLEAR FROM PERSONS OR OBSTACLES, BEFORE OPERATING THE ENGINE.

NOTE: the optional attachments offer a wider range of application other than the showed ones.

Refer to 4-33 for changing the bucket.

A. DIGGING INSTRUCTION 1. Use mainly the mere arm force for digging. Use the full bucket rotation stroke to fill it completely. Setting the bucket too deep will decrease the machine’s efficiency.

2. Maximum digging force position.

The attachment will provide maximum digging force when arm and boom are positioned at 90° ~ 110° from each other. Operate slowly to get maximum digging force.

3. Bucket teeth direction.

Direct bucket teeth parallel to digging direction. The bucket must be used for shallow (A) diggings, so as to reduce the resistance and avoid damaging the teeth.

4. Operate boom carefully.

Activate boom operation by moving the control levers carefully. Do not perform sudden starts and stops of the boom as this creates unnecessary stress on the machine and its components.

5. Clean sand and soil from bucket.

Operate arm to a near level position and bring the bucket to a dumping position. If sand and soil do not fall out, move the bucket lever right and left a few times to remove soil stuck to the bucket.

3-27

3. BASIC MACHINE OPERATION A.1 DITCH DIGGING The working efficiency is much improved when the bucket is oriented correctly for digging ditches and parallel to a ditch.

For wide ditch digging, dig the two sides first, then dig the centre portion.

A.2 USING THE DOZER BLADE 1. The dozer blade is used to push the soil back into an excavated ditch, or for ground levelling.

2. Scrape the soil laid on the ground at its upper or side face with the dozer blade. Adjust the height of dozer with the dozer blade control lever to avoid overloading the engine.

A.3 OFFSET DIGGING

WARNING AS THE BOOM SWING OPERATING RANGE IS WIDER, OPERATE THE ATTACHMENT PAYING ATTENTION TO THE SURROUNDING CONDITIONS. By depressing the left and right sides of the swing pedal (1) alternatively, the boom (2) swings in left and right directions, enabling offset digging in narrow spaces.

By depressing the left side of swing pedal, the boom swings leftward, and by pressing the right side the boom swings rightward.

The advantage of this function is that it enables offset digging work as shown in the figure.

A. SLEWING RIGHT B. SLEWING LEFT

3-28

3. BASIC MACHINE OPERATION B. LOAD 1. The working efficiency is improved, if the dump truck is parked in a way that the swing angle of the arm is the smallest one. At the same time the operator view remains the best.

2. It is recommended that loading be started from the front side of the dump truck body. This will make loading easier and more soil can be loaded than by loading from the side.

C. MINIMUM SLEWING POSITION 1. Extend arm cylinder and bucket cylinder to maximum length, and fold bucket.

2. Extend boom cylinder to maximum length.

3. Depress the left side of swing pedal, and then swing boom by the left end of swing.

4. Handle operating lever to slew upper frame.

NOTE: protect the bucket/attachment from damage due to impact.

BOOM IN FOLDED POSITION

BOOM IN FORWARD POSITION C.1 OPERATING IN NARROW SPACE Slewing may be done in narrow or limited operating space with the bucket folded in as shown in the figure.

MINIMUM SLEW RADIUS Unit: mm (ft·in) Boom

Type Canopy

Cab

Boom folded position

1460 (4’ 9”) (left 42°)

1760 (5’ 9.3”) (left 42°)

Boom forward position

1560 (5’ 1.4”)

1890 (6’ 2.4”)

3-29

3. BASIC MACHINE OPERATION 3.1.10

MACHINE PARKING

WARNING • •

•

• •

ALWAYS PARK THE MACHINE ON A HARD LEVEL, SURFACE. WHEN PARKING ON A SLOPE IS UNAVOIDABLE, POSITION THE MACHINE AS SHOWN IN THE FIGURE. BLOCK THE CRAWLER BELT/CRAWLER (1), DIG BUCKET TEETH INTO GROUND (2), LOWER DOZER BLADE TO THE GROUND (3). THIS WILL HELP PREVENT MACHINE MOVEMENT. SET THE SAFETY LOCK LEVER TO THE “LOCKED” (UP) POSITION TO AVOID ANY UNEXPECTED MACHINE MOVEMENT. STOP THE ENGINE BEFORE LEAVING THE CAB/ CANOPY. IF THE MACHINE IS TO BE PARKED ON A ROAD WAY, MOVE THE MACHINE TO THE SHOULDER TO ALLOW PASSING OF TRAFFIC. ALSO POST REFLECTIVE WARNING SIGNS AND MARKERS AT A DISTANCE FROM THE MACHINE TO SAFELY WARN MOTORISTS. REFER TO LOCAL CODE AND REGULATIONS REGARDING THE POSTING OF WORK AREA WARNINGS AND MARKERS.

1. Place both travel levers (4) into the “NEUTRAL” position.

2. Set the throttle lever (5) to “LOW IDLING”.

3. Place the bucket (2) on the ground.

4. Place the dozer blade (3) on the ground.

5. Block both crawlers by means of chocks.

6. Set the safety lock lever (6) to the “LOCKED” “A” position.

3-30

3. BASIC MACHINE OPERATION 3.1.11

CHECKS AND VERIFICATION AFTER WORK

Check regularly gauge cluster.

1. If fuel level in the tank is low, stop the engine and refuel.

2. If the engine coolant temperature gauge is in the H range or the coolant temperature lamp is on, move the machine to a safe place. Run the engine at low engine speed to lower temperature. Refer to “INSPECTION AND MAINTENANCE TABLE”, 4-26 for details on preventive maintenance.

3. If the engine oil pressure lamp is on, move the machine to a safe place. Stop the engine immediately and repair as necessary before resuming operation. Refer to “INSPECTION AND MAINTENANCE TABLE”, 4-26 for details on preventive maintenance.

3.1.12

PRECAUTIONS AFTER OPERATION

1. Check for any oil or coolant leakage. Check the attachment, exterior and crawlers. Repair as needed before resuming operation.

2. Refuelling. Do not overfill fuel tank (up to the top).

With temperature increase the fuel can expand and overflow.

3. Remove mud from crawlers.

3.1.13

AVOID SUDDEN ENGINE STOP

NOTE: sudden stop of the engine while operating at high speed causes a sudden rise of engine temperature resulting in deterioration of oil, damage to sealing components, etc.

•

Avoid stopping the engine when running at high idle. The engine is to be run for around 5 minutes with no load before stopping the engine. Continuously monitor the job site and machine for changing conditions to avoid sudden stop of the engine.

The most important matter is to always pay attention to safety so that emergency stop of the engine will not be required.

•

If the sudden stop of engine is necessary due to the changing conditions, hazardous situation or trouble with the machine, do the following to avoid injury or the damage to machine.

•

Do not restart the engine until its temperature is allowed to cool.

3-31

3. BASIC MACHINE OPERATION 1. Even if the engine does not run, keep the safety lock lever in the “LOCKED” position.

2. When the emergency stop is made without placing the bucket to the ground, support it with safety blocks (2) and lock the crawlers.

3. When the emergency stop is activated on a slope, lock both crawlers from downhill side.

2

F26017

4. While you are waiting to restart the engine and the machine, free the working area from people and possible obstacles. Set limits around the machine, taking the appropriate measures so that nobody penetrates this area.

5. If the trouble cause is not clear or if a repair is required, address to an authorized Dealer.

6. After an emergency stop, do not restart the engine until the coolant has completely cooled down.

3.1.14

MACHINE SECURITY

Use the starter key switch to lock the following item.

•

Engine door

•

Storage door

•

Right side service door 1. BLOCK KEY

3-32

3. BASIC MACHINE OPERATION 3.1.15

CAUTION WHILE USING RUBBER CRAWLERS

A. PROPER USAGE The rubber crawlers offers excellent features that steel crawlers do not possess.

However, if they are used in the same way as the steel crawlers, then their advantages cannot be fully exploited. Operation of the machine varies upon working site and conditions.

•

Although the rubber crawler displays many advantages because of its material properties, it has disadvantages in terms of strength. As a consequence, it is necessary to be familiar with the characteristics of this kind of crawler. Read thoroughly section “CAUTIONS WHILE USING RUBBER CRAWLERS” before use.

Rubber crawler

Steel crawler

Less vibration

'

Smooth operation

2

Low noise

'

Harmless for paved road

'

Easy handling

'

Not damageable

'

Large traction force

Excellent

2: Good

': Ordinary

Comparison between rubber and steel crawlers B. WARRANTY OF RUBBER CRAWLERS Warranty does not cover such damages to the rubber crawlers that result from improper working or if their tension is inaccurate. Do not operate the machine over objects like steel plates, steel pipes, steel concrete rod, stone and rocks with sharp edges operating the machine over such objects will cause damage to the rubber crawler belts.

C. PROHIBITED WORK Do not carry out the following operations: 1. Do not travel nor work on following surfaces: gravel-mixed land, rugged and solid rock bed, reinforcing bar, iron scraps, edges of steel plates.

2. Do not operate and/nor travel in such places as river beds where there are lots of stones of different sizes. The rubber crawler tends to be damaged or come off from the rollers as the result of being caught in the grooves on the rubber crawlers. The life of rubber crawler is shorter, if it skids or rubs against the soil.

3. Do not let oil, fuel, solvents, etc., come in contact with rubber crawlers. If this happens, wipe off crawlers with a cloth immediately.

3-33

3. BASIC MACHINE OPERATION 4. Do not enter such hot places as an open-air fire, steel plate left in the open sun.

Do not work in asphalt leveling.

5. If the machine has to be stored for a long period (more than three months), keep it indoors, so that it is not exposed to direct sunshine and rain.

Refer to 3-39 for the storage procedures.

6. If the machine travels laterally on one crawler, and the other side crawler is floating, this may come off from the rollers or get damaged.

D. CAUTIONS ON USAGE Take care of following during work: 1. Rubber crawlers slip easily on icy surfaces.

Take the necessary safety precautions.

2. Avoid making a spin turn on a concrete road.

3. Avoid abrupt change of directions because it will cause early wear or chipping of the rubber crawler.

4. Exercise care so the rubber crawler is not damaged by the bucket while working.

5. Do not operate the machine by pressing the bucket against concretes and walls.

6. Lower the machine slowly, if it had previously been lifted by means of the attachment.

3-34

3. BASIC MACHINE OPERATION 7. If the machine is operated in salty corrosive places, the core metal can detach easily. Do not use the rubber crawler under such circumstances. If the rubber crawlers come in contact with these substances wash them with water.

8. The rubber crawlers have to be used with a temperature range between -25 °C and +55 °C (-13 to 131 °F).

NOTE: use the rubber crawlers under proper tension, to prevent them from coming off the rollers. Operate the rubber crawler carefully even when tensioning is proper.

9. Avoid changing machine direction on sites with different heights (about 20 cm (8 in)). To overcome the gap, place the machine perpendicular to the obstacle.

10. When climbing back on a slope, avoid changing direction of the machine while climbing on a point between a level ground and the slope.

11. If you travel on a slope with the machine higher at one side, this will risks to damage the rubber crawler. Both machine sides must travel at the same level.

3-35

3. BASIC MACHINE OPERATION 12. Do not change direction of the machine with the rubber crawlers on ground with high spots, as shown in the figure as it will cause the rubber crawler to come off or get damaged.

3-36

3. BASIC MACHINE OPERATION 3.1.16

MACHINE OPERATION WITH ADVERSE WEATHER CONDITIONS

A. OPERATION WITH EXTREME COLD

CAUTION When the temperature is extremely low, oil flow is reduced due to increased viscosity, making start-up difficult. Coolant may freeze damaging cooler and/or engine.

A.1 FUEL AND OIL Use fuel and oil of high quality and low viscosity for each system. See section 4. Maintenance, “SPECIFICATIONS OF LUBRICANT, FUELS AND COOLANTS” 4-10 for details.

A.2 COOLANT •

In cold climates, the ratio of mixing antifreeze into the cooling system should conform with the lowest predicted ambient temperature. If coolant freezes, the radiator, crankcase and cylinder head may be damaged. To avoid freezing hazard, it is necessary to check that the cooling system is filled with an antifreeze mixture: otherwise replace the radiator coolant with this mixture.

•

When shipped from the factory, the machine contains coolant mixed with all-season-type LONG LIFE COOLANT.

•

It is recommended to inspect the coolant to maintain proper viscosity.

NOTE: in extremely frigid climates, covering the radiator is a method to aid the machine warm-up. If necessary to maintain temperatures, cover the outer edges of the radiator, leaving an opening in the centre part of the cover; thus, avoiding fan overloading. Keep a close watch on the gauge cluster for warning icons during operation. It may be necessary to use a coolant heater, fuel heater, engine heater jacket, and/or additional battery power to aid engine starting. Likewise, mix coolant to a protection temperature of 5 °C (9 °F), lower than the machine will experience during operation, storage or transport.

A.3 BATTERY When the temperature becomes low, the charging power decreases or the battery may freeze. Keep the charging rate as around 100% as possible and cover the battery with insulation material.

Perform test on the battery. We recommend the test be performed at room temperature for best results. Use a hydrometer to check the specific gravity of each cell and compare the readings with the table provided below.

Battery fluid temperature

Charging rate 100%

90%

80%

75%

-10 degree C (14 F)

1.28

1.26

1.24

1.23

0 degree C (32 F)

1.27

1.25

1.23

1.22

20 degree C (68 F)

1.26

1.24

1.22

1.21

Do not measure the specific gravity of battery fluid just after operation NOTE: keep battery terminals free of ice and snow to avoid short circuits. In extremely cold climates, remove the battery and store it overnight at room temperature.

A.4 AFTER OPERATION Mud and water adhering to the machine may freeze interfering with proper machine operation. Use the following general guidelines as reference to prevent malfunctions: •

Remove water and mud from the machine. Remove water adhering to the travel system thoroughly and park on dry ground to prevent the travel system from freezing.

•

Retract the cylinder rods to minimum length to reduce exposed area of the rods. This will prevent mud or water on the rod faces from damaging the seal.

3-37

3. BASIC MACHINE OPERATION B. OPERATION IN MARITIME OR SALTY CLIMATE B.1 BEFORE OPERATION •

Check all mounting hardware for proper tightness. Torque to proper value to aid in preventing salt from entering the machine systems.

•

Apply grease to the electrical equipment as required to prevent corrosion.

B.2 PRECAUTIONS AFTER OPERATION Wash the machine thoroughly to remove salt. Apply oil or grease as necessary to prevent corrosion of mechanical pieces.

C. CARE FOR ELECTRICAL EQUIPMENT The electrical equipment is especially sensitive to water. Be careful not to expose the electrical equipment to water when washing the machine or when it is raining. The electrical components (relays, fuses, etc.) are installed in the vicinity of the operator’s seat.

Never expose the operator’s seat to water.

D. OPERATION IN DUSTY AREAS D.1 AIR CLEANER Clean or replace the element at the corresponding interval. See “Maintenance” section for details.

D.2 RADIATOR Clean the radiator regularly to prevent the radiator core from becoming clogged with dust.

D.3 FUEL Be careful not to let contamination in the fuel when refuelling. Inspect the elements and filters at the corresponding interval.

D.4 ELECTRICAL EQUIPMENT Clean the starter and generator especially, at the corresponding interval, to prevent dust from accumulating.

See 4. “MAINTENANCE” section for details.

3-38

3. BASIC MACHINE OPERATION 3.1.17

REFER TO SECTION III “PRECAUTIONS WHEN STORING THE MACHINE FOR A LONG PERIOD”

When storing the machine for more than one month, observe the following points to prevent the machine function from deteriorating.

REF.

ACTION

CLEAN THE MACHINE Wash the machine thoroughly.

Check the travel system for any malfunctions and service as required.

Lubricate every required part.

LUBRICATION

Check the lubrication oil to make sure it is at the proper level and for contamination.

If necessary, add oil to the motor. If engine oil is contaminated, discharge it.

•

Lubricating oil deteriorates even when the machine is not used.

•

Be sure to check the oil before operating the machine again.

Apply sufficient rust inhibitors to portions where rust is likely to occur, especially the exposed rod of the cylinder.

BATTERY

Remove the battery and store in a dry protected place after charging fully. If the battery is not removed, disconnect its negative terminal.

COOLANT

If there is a possibility that the coolant may freeze, add antifreeze in the coolant suitable for the outside temperature.

Normally, long life coolant is mixed in, so it is not necessary to change the coolant.

DUST AND HUMIDITY PREVENTION

Store the machine in a dry and protected place. Should the machine has to be left outside, position it on a wooden table and cover it with a waterproof sheet, placed so as to allow ventilation.

•

Retract as far as possible all cylinders rods. Otherwise coat the exposed cylinder rods with grease.

•

Lower the bucket to the ground and place blocks under the crawlers.

•

Lubricate all greasing points.

•

Paint any exposed part to prevent rust formation.

If the applied oil layer is insufficient, irregular wear may occur during the machine use.

PERIODICAL LUBRICATION DURING Start the engine and operate the machine and attachment, etc. once a month to lubricate all of the parts.

STORAGE •

Before starting the engine, check the engine oil and coolant level. If necessary top them up.

•

Remove rust preventing agent covering cylinders and rods.

•

Apply rust inhibitors to cylinder rods.

•

After starting the engine, warm up the machine completely. Operate travel, swing and digging hydraulic systems 2 or 3 times to lubricate sliding surfaces.

•

Ensure proper ventilation during warming-up operations.

USING THE MACHINE Before placing the machine back into operation, proceed as follows before starting up.

AFTER PROLONGED • Fully wiped off the rust inhibitors from the cylinders and piston rods.

STORAGE • Refill fluids to proper levels and lubricate as required.

•

Thoroughly check all systems prior to operating the machine at full load.

•

Check condition of all hoses and connections.

•

Replace engine oil filters and top up engine oil.

3-39

3. BASIC MACHINE OPERATION

3-40

4. MAINTENANCE

4-1

4. MAINTENANCE

4-2

4. MAINTENANCE

4.1

GENERAL SAFETY INFORMATION

WARNING READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS AND PROCEDURES FOUND IN THIS MANUAL BEFORE ATTEMPTING ANY OPERATION, INSPECTION OR MAINTENANCE OF THIS MACHINE, ATTACHMENT OR SYSTEMS.

NOTE: address to an authorized Dealer for the adjustment, disassembly and repair of the engine, reduction gear and electronic equipment (controller, etc.). a. We recommended that an inspection and maintenance schedule be developed and maintained on a regular basis for this machine. Developing and maintaining such a schedule, helps to keep the machine in the best operating condition. b. The information contained in this section gives the proper procedures for performing inspection and maintenance functions for this machine. Use these procedures when performing inspection and maintenance, as they will guide you step by step through each procedure. The time interval of such operations is indicated in the inspection and maintenance tables. c. Basically, lubrication and maintenance intervals are determined by the hourmeter. It is also possible to perform those operations according to calendar time (daily, weekly, monthly, etc.), referring to the service hours displayed. Items for which service time cannot be specified are explained in the section WHEN REQUIRED. NOTE: the inspection and maintenance tables mentioned in this section give only general time intervals. It may be necessary to develop a custom schedule to perform machine maintenance at more frequent intervals based on the work conditions such as severe applications, work in dusty or humid circumstances, etc.

See page 4-26 “INSPECTION AND MAINTENANCE TABLE”. d. Be sure to dispose of all waste materials correctly. e. Use only specified oils, fluids, lubricants, filters and replacement parts to keep machine in the best operating condition. Furthermore, use the oils and greases with the specified viscosity depending on the ambient temperature.

Store the containers and cans of lubricating oil, hydraulic oil and grease etc. in closed rooms. Take necessary measures to protect them from dust, water etc.

4-3

4. MAINTENANCE

4.2

GENERAL RULES AND SAFETY PRECAUTIONS

WARNING • • •

DO NOT CARRY OUT ANY OTHER INSPECTION AND MAINTENANCE PROCEDURES THAN THOSE SPECIFIED IN THIS MANUAL. CARRY THEM OUT AFTER PARKING THE MACHINE IN A FLAT AND ACCESSIBLE PLACE. DO NOT ATTEMPT ANY MAINTENANCE WITH ENGINE RUNNING. STOP THE ENGINE AND ALLOW MACHINE TO COOL TO AVOID INJURY.

A. WEAR SAFETY EQUIPMENT TO AVOID INJURY

WARNING WEAR HARD HAT, SAFETY GOGGLES OR FACE SHIELD, WORK GLOVES, SAFETY SHOES AND WELL FITTING WORK CLOTHES WHEN PERFORMING INSPECTION AND MAINTENANCE PROCEDURES ON THIS MACHINE.

B. KEEP MACHINE CLEAN Thoroughly clean machine before performing inspection and maintenance procedures. This facilitates and makes certain the faults detection and the maintenance work. In this way the premature wear of some machine’s components is reduced.

C. READ SERVICE HOURMETER Read the hourmeter daily, and check with the scheduled maintenance book. See 4-26 for a better reference. Proceed with any maintenance as required.

4-4

4. MAINTENANCE D. STAY AWAY FROM MOVING PARTS Never attempt any MAINTENANCE with engine running. Always stop the engine.

Otherwise, entanglement in moving parts can cause serious injury.

To prevent accidents, care should be taken to ensure that hands, feet, clothing, jewellery and hair do not become entangled when working around moving parts.

E. APPLY NOTICE OF MAINTENANCE IN PROGRESS Before beginning any inspection or maintenance procedure, secure a “MAINTENANCE IN PROGRESS” tag to the operator’s console, to inform that it is forbidden to operate the machine. This tag will help prevent accidental starting of the machine.

F. OBSERVE SAFETY PRECAUTIONS Start the inspection and maintenance work only if you fully understand the contents of safety precautions indicated on the machine decals.

G. PREVENT BURNS Use caution and wear the proper safety equipment when working around hot areas. Never change oil, engine coolant or filters immediately after a machine has been stopped. Before performing any maintenance procedure, stop the engine and let the same and the radiator cool. Skin contact with hot water or steam jets, can cause severe burns.

Engine oil, reduction gears oil and hydraulic system oil, become hot during machine operation. Wait for the oil and components to cool before starting any maintenance or inspection work.

4-5

4. MAINTENANCE H. WARM ENGINE OIL Engine oil should have a temperature of between 20 to 40 °C (68 to 104 °F) before the oil is changed.

If necessary run engine until the oil is warm within the recommended oil change temperature.

I. PRESSURIZED SYSTEM HAZARDS Release the internal pressure before removing the hydraulic system or fuel system, piping or coupling of the cooling system or other related parts to which internal pressure is applied.

See “RELEASING INTERNAL PRESSURE OF HYDRAULIC SYSTEM” TO RELEASE INTERNAL PRESSURE.

J. PREVENT CONTAMINATION Always cap or plug lines when hydraulic components are removed, to help prevent hydraulic system contamination, that can be caused by dirt, dust and debris entering a line or port.

CAUTION Never allow an hydraulic line or component to become contaminated by polluting agents. This could cause severe system damages. Contact an authorized Dealer to obtain spare parts to be used on this machine.

K. INSPECT WASTE OIL AND FILTERS Check all waste oils and filters for debris and foreign matters.

It is recommended to open the oil filters to determine any abnormal wear.

4-6

4. MAINTENANCE J. CAUTION DURING REFILLING During the refilling of fuel or oil, avoid to remove possible strainers fitted in the filling ports.

M. DISPOSE OF WASTE PROPERLY Improperly disposing of waste can threaten the environment. Potentially harmful waste on excavators includes such items as lubricants, fuel, coolant, brake fluid, filters, and batteries.

Use leakproof containers when draining fluids. Do not use food or beverage containers that may mislead someone into drinking from them.

Obtain information on the proper way to recycle or dispose of waste from your local environmental or recycling centre, or from your authorized Dealer.

N. SEALS AND O-RINGS After removing the O-ring or gasket, clean the installing face, and replace with a new one.

Always replace O-rings with new ones.

Never reuse a gasket during reassembly of components. Be sure to lubricate all new gaskets with the appropriate oil before installation.

O. SUPPORT THE MACHINE PROPERLY Never attempt to work on the machine without securing it first. Always lower the attachment or tool to the ground before working on the machine. If you must work with the machine or attachment lifted, support them securely.

4-7

4. MAINTENANCE P. CAUTION DURING BUCKET REPLACEMENT Never insert your finger into the pin bores.

When aligning the pin bores, never insert your finger, hands or arms into them.

The alignment check must be carried out visually.

Q. DUSTY ENVIRONMENT When the machine is operated in dusty environments, take the following precautions.

•

Frequently check for the indicator for air cleaner restriction. Clean up the air cleaner element before the specified period.

•

Clean up the radiator before the prescribed time interval to prevent its clogging.

•

Clean up and replace the fuel filter element before the prescribed specific term.

•

Clean up the electric components, especially the starter and generator, so as not to allow deposits of dust on them.

R. CLEANING PARTS Use only approved cleaning solvents and proper equipment to clean parts.

WARNING NEVER USE GASOLINE, OR OTHER FLAMMABLE SOLVENTS TO CLEAN PARTS. ALWAYS CLEAN PARTS IN A WELL VENTILATED AREA.

4-8

4. MAINTENANCE S. PRESSURE IN THE HYDRAULIC TANK Always release the internal pressure of the hydraulic tank before performing inspection or maintenance procedures.

1. Push rubber cap “DOWN” to release air pressure in the tank.

CAUTION Gases from hydraulic tanks may be hot.

Wear safety clothing.

T. SAFETY DURING WELDING 1. Turn key switch to the “OFF” position. Wait 4 seconds for electrical power to disconnect.

2. Remove negative (-) cable from battery terminal.

3. Attach welder ground cable with 1 m (3’ 3”) away from component being welded.

4. Make sure welder ground is not located at a seal or bearing. Do not locate welder ground at seal or bearing.

5. Make sure that no bearings or seals separates the welder ground and the weld area.

4-9

4. MAINTENANCE

4.3

LUBRICANT, FUEL AND COOLANT SPECIFICATIONS

The following table indicates the proper oils, lubricants and fuels to be used with various climates and service conditions.

Temperature range Components / System

Capacity

-22° -4° 14° 32° 50° 68° 86° 104 °F -30° -20° -10° 0° 10° 20° 30° 40 °C

Hydraulic tank

9 litres (2.4 gal)

ISO VG 46

Total Hydraulic system *1

15 litres (4.0 gal)

ISO VG 46

H level: 3.5 litres (0.9 gal)

SAE 15W-40

Engine oil *1

L level: 2.2 litres (0.6 gal)

Fuel tank

22 litres (5.8 gal)

Radiator (Antifreeze/Coolant) *1

1.8 litres (0.48 gal)

*

SAE 10W-30

AKCELA

Specification

HYDRAULIC EXCAVATOR FLUID

MS 1230

N° 1 ENGINE OIL

MS 1121 API CH-4 ACEA E5

*

ASTM D-975 Grade 2-D

ASTM D-975 No.2 30% LLC mixture *

50% LLC mixture

Cooling system total (Antifreeze/Coolant) *1

30% LLC mixture 3.7 litres (1.0 gal)

Travel motor oil x 2

330 cm3 (0.35 qts.)

SAE 80W-90

Lower rollers oil x 2

30 cm3 (0.032 qts.)

SAE 80W-90

Idlers oil x 2

60 cm3 (0.063 qts.)

SAE 80W-90

*

PREMIUM ANTI FREEZE

MS 1710

MULTI PURPOSE GREASE 251H EP

Extreme pressure Multipurpose N.L.G.I. No. 2 Lithium base grease EP type

50% LLC mixture

Boom, arm, linkage, attach12-places ment Dozer blade cylinder

6-places

Boom swing cylinder pin

2-places

Slewing bearing

1-places

Slewing gear

1-places

Belt/crawler tension adjust see adjustment procedure in 2-places section Control levers and pedals

As needed disassembly is required

NOTE: *1.Machines are shipped from factory with * marked oil. *2.L.L.C means “Long Life Coolant” (see next page).

WARNING Antifreeze/Coolant is flammable. Direct contact with hot surfaces of flames may cause the Antifreeze/Coolant to burn. Repair leaks immediately and dispose of used Antifreeze/Coolant promptly and in accordance with government environmental regulation.

4-10

4. MAINTENANCE NOTE: USE OF BIO-DEGRADABLE OILS When you use Bio-degradable Oil “BIO OIL”, refer to the following information: 1. There are two types of “BIO OIL” available; vegetable-based and synthetic-based. We recommend to use the synthetic oils, because vegetable ones have a maximum service temperature of 80 °C (176 °F).

Because of this, the degradation of vegetable-based oil occurs more rapidly, and they have a reduced service life.

2. Do not mix Bio-oil with original factory-filled mineral oil, in case it is necessary to use Bio-oil, flush the hydraulic system that was filled with bio-oil three times.

3. If you use Bio-oil, slewing and travel parking brake performance will be reduced, because of the lower friction factor of Bio-oil compared to that of mineral oil.

4. For further information about recommended Bio-degradable oils, please contact an authorized Dealer.

4-11

4. MAINTENANCE

4.4

MAINTENANCE GENERAL TABLE

A. PARTS TO BE REPLACED During maintenance, replace parts subjected to wear before expiry, as filters and cartridges. The machine can be used with greater profitability, if worn parts are properly and timely replaced.

No. Device

Parts name

Q.TY Replacement interval

1

Return filter

1

Hydraulic oil tank

(O-ring)

After 50 hours (first change) Every 1000 hours (from 2nd change) (Breaker specification: Every 250 hours)

2

Hydraulic oil tank

Suction filter

1

Every 2000 hours

(O-ring) 3

Air cleaner

Element

Every 500 hours

4

Engine oil filter

Oil filter

1

5

Fuel filter

Fuel filter

1

Every 250 hours

6

Water separator

Element

1

When required

7

Bucket

Side cutter (right) (7a)

1 1 6 6

When required

3 3 3

When required

After 50 hours (first change) Every 250 hours

Side cutter (left) (7b) (Capscrew) (Nut) 8

Bucket

Tooth Safety pin Rubber locking pin

4-12

4. MAINTENANCE

4.5

ACCESSORY TOOLS

No.

TOOL NAME

NOTES Discharge pressure 24.5 MPa (3555 psi)

1

GREASE GUN

2

DECAL

3

TOOL CASE

4

WRENCH

For engine oil filter

5

L-WRENCH

For grease fitting of idler adjuster

Cartridge 400 cm3 (24.4 cu·in)

If tools are lost or damaged, require them from an authorized Dealer.

4-13

4. MAINTENANCE

4.6

TORQUE SPECIFICATIONS FOR CAPSCREWS AND NUTS

The following torque specifications are provided for use when actual torque value of a fastener is not known.

Check the capscrews and nuts for their looseness and dropping off before the start of daily work and at the periodical maintenance intervals. Retighten the loose screws and nuts, and install new ones to replace the dropped ones. For the new machine, the check and retightening of looses screws and nuts must be carried out at first 50 hours operation. When replacement is needed, make sure to use genuine parts to the same dimensions.

Check the table hereunder for proper torque.

•

The table hereunder, is not valid for plastic screws used to fasten hoods, etc.

For the tightening torque of this kind of screws, address to an authorized Dealer. Over-tightening may cause the damage of the parts to be fixed.

•

If this manual specifies a different torque, use such value regardless of the table below.

•

Numerical indication on the capscrew head shows the classification (A) strength (e.g.: 8.8). No indication is provided for smaller size of capscrews, M5 or less.

1. Metric coarse thread standard tightening torque values. Tighten all bolts and nuts to proper torque values.

Metric Coarse Thread (Not plated) Torque value Unit: Nm (lbf•ft) Classification Nominal size

4.8T

7T

10.9T

No lubrication Oil lubrication No lubrication Oil lubrication No lubrication Oil lubrication

M6

P=1

4.4 ± 0.5 (3.2 ± 0.4)

3.7 ± 0.4 (2.7 ± 0.3)

9.6 ± 1.0 (7.1 ± 0.7)

8.1 ± 0.8 (6.0 ± 0.6)

17.4 ± 1.8 (12.8 ± 1.3)

14.7 ± 1.5 (10.8 ± 1.1)

M8

P=1.25

10.7 ± 1.1 (7.9 ± 0.8)

9.0 ± 0.9 (6.6 ± 0.7)

23.5 ± 2.0 (17.3 ± 1.5)

19.6 ± 2.0 (14.5 ± 1.5)

42.2 ± 3.9 (31.1 ± 2.9)

35.3 ± 3.9 (26.0 ± 2.9)

M10

P=1.5

21.6 ± 2.0 (15.9 ± 1.4)

17.9 ± 1.8 (13.2 ± 1.3)

46.1 ± 4.9 (34.0 ± 3.6)

39.2 ± 3.9 (28.9 ± 2.9)

83.4 ± 8.8 (61.5 ± 6.5)

70.6 ± 6.9 (52.1 ± 5.1)

M12

P=1.75

36.3 ± 3.9 (26.8 ± 2.9)

31.4 ± 2.9 (23.2 ± 2.1)

79.4 ± 7.8 (58.6 ± 5.8)

66.7 ± 6.9 (49.2 ± 5.1)

143 ± 15 (105 ± 11)

121 ± 12 (89.2 ± 8.9)

M14

P=2

57.9 ± 5.9 (42.7 ± 4.4)

49.0 ± 4.9 (36.1 ± 3.6)

126 ± 13 (92.9 ± 9.6)

106 ± 10 (78.2 ± 7.4)

226 ± 20 (167 ± 15)

191 ± 19 (141 ± 14)

M16

P=2

88.3 ± 8.8 (65.1 ± 6.5)

74.5 ± 6.9 (55.0 ± 5.1)

191 ± 20 (141 ± 15)

161 ± 16 (119 ± 12)

343 ± 39 (253 ± 29)

284 ± 29 (209 ± 21)

M18

P=2.5

122 ± 12 (90.0 ± 8.9)

103 ± 10 (75.8 ± 7.2)

265 ± 29 (195 ± 21)

226 ± 20 (167 ± 15)

481 ± 49 (355 ± 36)

402 ± 39 (297 ± 29)

M20

P=2.5

172 ± 17 (127 ± 13)

144 ± 14 (106 ± 10)

373 ± 39 (275 ± 29)

314 ± 29 (232 ± 21)

667 ± 69 (492 ± 51)

559 ± 59 (412 ± 44)

M22

P=2.5

226 ± 20 (167 ± 15)

192 ± 20 (142 ± 15)

500 ± 49 (369 ± 36)

422 ± 39 (311 ± 29)

902 ± 88 (665 ± 65)

755 ± 78 (557 ± 58)

M24

P=3

294 ± 29 (217 ± 21)

235 ± 29 (173 ± 21)

637 ± 69 (470 ± 51)

520 ± 49 (383 ± 36)

1160 ± 118 (856 ± 87)

941 ± 98 (694 ± 72)

M27

P=3

431 ± 39 (318 ± 29)

353 ± 39 (260 ± 29)

941 ± 98 (694 ± 72)

765 ± 78 (564 ± 58)

1700 ± 167 (1250 ± 123)

1370 ± 137 (1010 ± 101)

M30

P=3.5

588 ± 59 (434 ± 44)

490 ± 49 (361 ± 36)

1285 ± 127 (948 ± 94)

1079 ± 108 (796 ± 80)

2300 ± 235 (1700 ± 173)

1940 ± 196 (1430 ± 145)

M33

P=3.5

794 ± 78 (586 ± 58)

667 ± 69 (492 ± 51)

1726 ± 177 (1270 ± 131)

1451 ± 147 (1070 ± 108)

3110 ± 314 (2290 ± 232)

2610 ± 265 (1930 ± 195)

M36

P=4

1030 ± 98 (760 ± 72)

863 ± 88 (637 ± 65)

2226 ± 226 (1640 ± 167)

1863 ± 186 (1370 ± 137)

4010 ± 402 (2960 ± 297)

3360 ± 333 (2480 ± 246)

4-14

4. MAINTENANCE 2. Metric fine thread standard tightening torque values. Tighten all bolts and nuts to proper torque values.

Torque value Unit: Nm (lbf•ft) Classification Nominal size

4.8T

7T

10.9T

No lubrication Oil lubrication No lubrication Oil lubrication No lubrication Oil lubrication

M8

P=1.0

11.3 ± 1.1 (8.3 ± 0.8)

9.5 ± 1.0 (7.0 ± 0.7)

24.5 ± 2.0 (18.1 ± 1.5)

20.6 ± 2.0 (15.2 ± 1.5)

44.1 ± 3.9 (32.5 ± 2.9)

37.3 ± 3.9 (27.5 ± 2.9)

M10

P=1.25

22.6 ± 2.0 (16.7 ± 1.5)

18.7 ± 1.9 (13.8 ± 1.4)

48.1 ± 4.9 (35.5 ± 3.6)

41.2 ± 3.9 (30.3 ± 2.9)

87.3 ± 8.8 (64.4 ± 6.5)

73.5 ± 6.9 (54.2 ± 5.1)

M12

P=1.25

39.2 ± 3.9 (28.9 ± 2.9)

33.3 ± 2.9 (24.6 ± 2.1)

85.3 ± 8.8 (62.9 ± 6.5)

71.6 ± 6.9 (52.8 ± 5.1)

154 ± 16 (114 ± 12)

129 ± 13 (95.2 ± 9.6)

M16

P=1.5

92.2 ± 8.8 (68.0 ± 6.5)

77.5 ± 7.8 (57.2 ± 5.8)

196 ± 20 (145 ± 15)

169 ± 17 (125 ± 13)

363 ± 39 (268 ± 29)

304 ± 29 (224 ± 21)

M20

P=1.5

186 ± 19 (137 ± 14)

155 ± 16 (114 ± 12)

402 ± 39 (297 ± 29)

333 ± 29 (246 ± 21)

726 ± 69 (535 ± 51)

608 ± 59 (448 ± 44)

M24

P=2

314 ± 29 (232 ± 21)

265 ± 29 (195 ± 21)

686 ± 69 (506 ± 51)

569 ± 59 (420 ± 44)

1240 ± 118 (915 ± 87)

1030 ± 98 (760 ± 72)

M30

P=2

637 ± 59 (470 ± 44)

530 ± 49 (391 ± 36)

1390 ± 137 (1030 ± 101)

1157 ± 118 (853 ± 87)

2500 ± 255 (1840 ± 188)

2080 ± 206 (1530 ± 152)

M33

P=2

853 ± 88 (629 ± 65)

706 ± 70 (521 ± 52)

1860 ± 186 (1370 ± 137)

1550 ± 155 (1140 ± 114)

3350 ± 334 (2470 ± 246)

2790 ± 275 (2060 ± 203)

M36

P=3

1070 ± 108 (789 ± 80)

892 ± 88 (658 ± 65)

2330 ± 226 (1720 ± 167)

1940 ± 196 (1430 ± 145)

4200 ± 422 (3100 ± 311)

3500 ± 353 (2580 ± 260)

4-15

4. MAINTENANCE

4.7

TORQUE SPECIFICATIONS FOR JOINTS AND HYDRAULIC HOSES

A. SLEEVE TYPE TUBE FITTINGS TUBE SIZE OD X WRENCH SIZE THICKNESS (mm) (mm)

TIGHTENING TORQUE Nm (lbf•ft)

10 u 1.5

19

44 ± 4.9 (33 ± 4)

15 u 2.0

27

147 ± 20 (110 ± 14)

18 u 2.5

32

177 ± 20 (130 ± 14)

22 u 3.0

36

216 ± 20 (160 ± 14)

28 u 4.0

41

275 ± 29 (200 ± 22)

35 u 5.0

55

441 ± 44 (330 ± 33)

B. JOINTS FOR PIPING (O-ring sealing type) NORMAL SCREW WRENCH SIZE SIZE (mm) (PF)

TIGHTENING TORQUE Nm (lbf•ft)

1/8

14

17 ± 2 (12 ± 1)

1/4

19

36 ± 2 (27 ± 1)

3/8

22

74 ± 5 (54 ± 4)

1/2

27

108 ± 9.8 (80 ± 7)

3/4

36

162 ± 9.8 (119 ± 7)

1

41

255 ± 9.8 (188 ± 7)

C. HYDRAULIC HOSE NORMAL SCREW WRENCH SIZE SIZE (mm) (PF)

TIGHTENING TORQUE Nm (lbf•ft)

1/8

17

15 ± 2.0 (11 ± 1)

1/4

19

29 ± 4.9 (22 ± 4)

3/8

22

49 ± 4.9 (36 ± 4)

1/2

27

78 ± 4.9 (58 ± 4)

3/4

36

118 ± 9.8 (87 ± 7)

1

41

137 ± 15 (101 ± 11)

NOTE: all above torque values are subject to a dry condition.

4-16

4. MAINTENANCE

4.8

INSTALLING HYDRAULIC HOSE AND PIPE JOINTS

WARNING When replacing any hose or seals, make sure the attachments are well secured to avoid sudden movement of attachment. Slowly remove fittings to release any hydraulic pressure during disassembly.

Metal joint and O-ring type fittings are used on this machine.

A. METAL JOINT The pressure exerted from the fitting (3) on the flexible (1) ensures the tightness (2). Use cautions to assemble and disassemble both pieces in order not to damage the seat.

B. O-RING SEAL JOINT The O-ring (2), allows insulating the oil pressure inside the hose (1) and to avoids oil spillages.

The tightening torque of the joint of each hydraulic hose (1) is determined by the diameter of the hose fitting screws. If you notice a fault of operation, repair hose connection or replace it.

When connecting worn parts, pay particular attention to keep sealing surfaces clean from dirt and try not to damage them.

Use exclusively O-ring seals without damages or faults.

B.1 O-RING 1. During reassembly, be sure to replace the O-ring with a new one.

2. If the fitting is loose and oil leaks may occur, do not tighten it. It is necessary to install a new O-ring and to check again for tightness.

3. Never install a damaged and deteriorated O-ring even if it is new one. The use of an O-ring other the specified one, causes oil leakage and short life of hydraulic equipment.

B.2 JOINT 1. Be careful not to damage hoses, pipes or seal faces, this can impair the tightness.

2. Keep seal surfaces free from dirt.

Fitting with foreign matter inside causes oil leakage.

B.3 HOSE 1. Avoid high pressure hoses to twist during connection. Life of twisted hoses is drastically reduced.

2. Wash pipes and hoses, both inside and outside, with washing fluid and accurately dry them before reconnection.

4-17

4. MAINTENANCE

4.9

RELEASING INTERNAL PRESSURE FROM THE HYDRAULIC SYSTEM

To avoid injury, release the internal pressure of the hydraulic system before carrying out any maintenance work.

Read the instructions in the following section.

A. RELEASING HYDRAULIC SYSTEM AND OIL TANK PRESSURE

WARNING •

•

•

NEVER CHANGE OILS OR FILTERS ON A MACHINE THAT HAS JUST FINISHED WORKING. ALLOW MACHINE TO COOL FIRST UNTIL OILS AND FLUIDS ARE WARM NOT HOT. RELEASE HYDRAULIC TANK PRESSURE, BEFORE WORKING WITH ANY HYDRAULIC COMPONENT, ACCORDING TO THE PROCEDURES PROVIDED BELOW. WHEN REPLACING ANY HOSE OR SEALS, MAKE SURE THE ATTACHMENTS ARE WELL SECURED TO AVOID SUDDEN MOVEMENT OF ATTACHMENT. SLOWLY REMOVE BOLTS TO RELEASE ANY HYDRAULIC PRESSURE DURING DISASSEMBLY.

NOTE: the above procedure is the only way to release internal pressure.

1. Park the machine on a level surface as shown in the right figure. Fully retract the arm cylinder and bucket cylinder. Then lower the boom to place the bucket on the ground, and lower the dozer blade.

2. In case of pilot operating lines (boom, arm, bucket, swing) stop the engine, then operate the control levers to release pressure in each line.

HYDRAULIC OIL CHECK POSITION 3. Set the safety lock lever to “LOCKED” position.

4. Make sure that the hydraulic oil temperature is below 40 °C (104 °F).

5. Stop the engine, remove the starter key and wait until the machine is cold.

6. Remove the left side cover (1).

7. Slowly loosen the cap (2) about half turn to release the inside pressure.

8. This completes the bleeding of pressure remaining in the hydraulic tank.

To maintain the system, check it often.

4-18

4. MAINTENANCE

4.10

BLEEDING AIR IN FUEL SYSTEM

If air enters the fuel system, the engine may become hard to start or it will malfunction. Bleed the air whenever the fuel tank is empty, the water separator is drained, or when the fuel filter element is replaced.

1. FUEL PUMP 2. FUEL FILTER 3. WATER SEPARATOR 4. BUTTON 5. AIR BLEED PLUG (INLET) 6. AIR BLEED PLUG (OUTLET) A. CLOSED B. OPEN Bleeding automatically 1. Fill the tank.

2. Turn starter key switch to “ON” position. Fuel pump works after 2 minutes, and air is automatically exhausted.

Bleeding fuel filter (Change cock type) 3. Deliver fuel by solenoid valve (1).

4. Place the cock of fuel filter in the “OPEN” position (3).

5. Push and hold the button (4) until the filter cup is filled with fuel.

6. Stop the fuel delivery.

Bleeding water separator 7. Loosen the water separator’s air bleed plug (5) at fuel inlet side.

8. Deliver fuel by solenoid pump.

9. Tighten air bleed plug (5) at inlet side when the fuel flow the air bleed plug becomes free of bubbles.

10. Loosen air bleed plug (6) at fuel outlet side.

11. Tighten air bleed plug (6) at outlet side when the fuel flow from the air bleed plug becomes free of bubbles.

12. Stop the fuel delivery.

4-19

4. MAINTENANCE

4.11

REPLACEMENT OF RUBBER CRAWLER

WARNING •

THIS WORK MUST BE CARRIED OUT BY TWO PERSONS. THE OPERATOR OPERATES THE MACHINE IN ACCORDANCE WITH THE SIGNAL FROM THE PARTNER. HAVING TO CARRY OUT VISUAL CONTROLS WITH THE CRAWLER IN MOTION, REMAIN ALWAYS AT AN EMERGENCY DISTANCE AND OUTSIDE FROM THE MOVING RANGE OF THE MACHINE. WHATEVER SERVICE TO THE CRAWLERS MUST BE CARRIED OUT WITH THE MACHINE SET UP IN THE FOLLOWING WAY: •THROTTLE LEVER AT IDLE RUN; •ENGINE SHUT DOWN; •STARTER KEY PULLED OUT; •SAFETY LOCK LEVER IN “LOCKED” POSITION.

•

GREASE IN THE CRAWLER IDLER ADJUSTER IS UNDER EXTREME PRESSURE AND CAN PENETRATE SKIN CAUSING SEVERE INJURY. KEEP FACE AND BODY AWAY FROM GREASE NIPPLE AREA. IF GREASE DOES NOT RELEASE AFTER ONE TURN OF THE GREASE NIPPLE, CALL AN AUTHORIZED DEALER FOR ASSISTANCE. BEFORE REMOVING THE RUBBER CRAWLER, CHECK THAT THE GREASE PRESSURE HAS BEEN COMPLETELY RELEASED. THE STAFF MUST RESPECT THE INSTRUCTIONS GIVEN IN THE SECTION “TAKING APART OF RUBBER CRAWLER”, OTHERWISE THERE IS THE RISK OF INJURIES.

•

•

4.11.1

CHECK AND TENSION ADJUSTMENT OF RUBBER CRAWLER

An appropriate adjustment of tension on the rubber crawler belt is important not only for prolonging the service life on the rubber crawler belt and machine but also preventing the rubber crawler belt from moving out of place.

WARNING SINCE THE ADJUSTMENT CHECK OF THE RUBBER CRAWLER TENSION IS CARRIED OUT WITH THE MACHINE LIFTED, THE SERIOUS DANGER THAT THE MACHINE FALLS IS ALWAYS REAL. NEVER MOVE THE MACHINE WHILE CHECKING AND ADJUSTING IT. WORK HAS TO BE PERFORMED BY TWO PERSONS, AND THE OPERATOR MUST OPERATE THE MACHINE IN ACCORDANCE WITH THE SIGNAL FROM THE PARTNER.

4-20

4. MAINTENANCE A. RUBBER CRAWLER The friction of the rubber crawler with the soil varies according to working conditions and soil nature. It is therefore necessary to check frequently the crawler tension and wear.

Therefore, frequently check crawler tension during the first 30 hours of new crawler service.

RUBBER CRAWLER A.1 CHECK CRAWLER TENSION 1. Move the rubber crawler so that the splice part (M mark) comes to the upper centre position.

2. Turn the superstructure of 90° and lower the bucket to lift the crawler as shown.

Keep the angle between the boom and the arm to 90° and 110° and position the round part of the bucket on the ground. Place the chocks (1) under the frame to support the machine.

3. Measure the clearance “A” between the lower face (2) of crawler frame and the upper face of crawler at the centre position of crawler frame (1).

Proper value (tension) “A”: Rubber crawler: 45 ~ 50 mm (1.77 ~ 1.97 in) Steel crawler: 90 ~ 95 mm (3.54 ~ 3.74 in) 4. If the tension is not within the expected values, loosen or tension the crawler according to the procedure of following section “A.2 ADJUSTMENT”.

NOTE: if the machine is operated with loose rubber crawler, there is the risk that the crawler springs and wears prematurely.

4-21

RUBBER CRAWLER (3) / STEEL CRAWLER (4)

4. MAINTENANCE A.2 ADJUSTMENT It is required to adjust the tension on the crawler depending on the working place of the machine. When working on a place with a lot of gravel or boulder, looser tension (upper limit range of tension) is preferable. With hard grounds, stronger tension (lower limit range of tension) is preferable.

WARNING •

•

GREASE IN THE CRAWLER IDLER ADJUSTER IS UNDER EXTREME PRESSURE AND CAN PENETRATE SKIN CAUSING SEVERE INJURY. KEEP FACE AND BODY AWAY FROM GREASE NIPPLE AREA. IF GREASE DOES NOT RELEASE AFTER ONE TURN OF THE GREASE NIPPLE, CALL AN AUTHORIZED DEALER FOR ASSISTANCE.

A.2.1 Tension the crawler Provide a grease gun.

1. Feed grease to the grease nipple (1) with suitable grease gun (2), so that the crawler achieves proper tension.

2. Move the machine forward and backward to equalize the tension on both crawlers of left and right.

3. Again check for the tension on the crawlers, and repeat the adjustment to obtain the proper tension on both crawlers.

NOTE: if the crawler is still too loose even after grease nipple has been filled, it could be that the cylinder joint or the machine are defective.

Address your authorized Dealer for repair.

4-22

4. MAINTENANCE A.2.2 Making tension looser

WARNING •

•

GREASE IN THE CRAWLER IDLER ADJUSTER IS UNDER EXTREME PRESSURE AND CAN PENETRATE SKIN CAUSING SEVERE INJURY. IF GREASE DOES NOT RELEASE AFTER ONE TURN OF THE GREASE NIPPLE, CALL AN AUTHORIZED DEALER FOR ASSISTANCE.

1. Gradually loosen the grease fitting to release grease under pressure.

Do not loosen the grease fitting (1) more than one turn.

2. Move the machine (crawler belt) forward and backward, when grease does not be released adequately.

3. Tighten the grease fitting.

Tightening torque: 73.5 ± 14.7 Nm (54.2 ± 10.8 lbf•ft) Move the machine forward and backward to confirm the correct tension on the crawler belts.

Again check the tension, and if it is not correct, adjust it again.

GREASE NIPPLE DETAIL

4-23

4. MAINTENANCE 4.11.2 REMOVAL OF RUBBER CRAWLER 1. Move the machine to an area with a hard level surface.

2. Operate boom, arm, and bucket to set the attachment on the ground.

Slowly and gradually lower the boom to lift one side of the machine as shown in the figure.

3. Support the lower travel structure of the machine with a safety support (1), etc.

4. Open the grease nipple (2) slowly so as to let grease come out and to relieve the pressure.

5. One turn, one turn and a half of the grease nipple (2) is sufficient, to loose the crawler.

6. Insert 3 steel pipes (1) into the bottom front rubber crawler belt then slowly rotate the sprocket backward.

When the rubber crawler belt separate from the idler wheel, stop the rotation.

Shut off the engine.

Slide the rubber crawler belt over the steel pipes to remove it.

A. DIRECTION OF ROTATION B. REMOVING DIRECTION

4-24

4. MAINTENANCE 4.11.3

INSTALLING RUBBER CRAWLERS

1. Start the engine.

2. Operate boom, arm, and bucket / attachment to set the bucket / attachment on the ground.

Slowly and gradually lower the boom to lift one side of the machine as shown in the figure.

3. Support the lower travel structure of the machine with a safety support (1), etc.

4. Engage the rubber crawler belt with the sprocket, and hang it on the idler.

5. Insert 3 steel pipes (1) into the bottom front rubber crawler belt then slowly rotate the sprocket backward.

When the rubber crawler belt separate from the idler wheel, stop the rotation.

Shut off the engine.

Slide the rubber crawler belt over the steel pipes to install it.

A. DIRECTION OF ROTATION B. INSTALLING DIRECTION

6. Stop the rotation of sprocket to confirm that the rubber crawler (2) is securely engaged to the sprocket, idler and lower rollers (1).

7. Referring to the next Section “CHECK AND ADJUSTMENT OF TENSION ON RUBBER CRAWLER”, carry out the check and adjustment of tension on rubber crawler (2).

8. After the confirmation for the engagement of rubber crawler belt to the sprocket (3), idler (4) and lower roller, and also for the proper tension on the rubber crawler belt, lower the machine to the ground.

4-25

4. MAINTENANCE

4.12

INSPECTION AND MAINTENANCE TABLE

Follow the chart below for recommended intervals of regular inspection and maintenance procedures. Perform inspection and maintenance according to the calendar time or operation time shown by the hourmeter, whichever comes first.

See the inspection and maintenance procedure mentioned below for details.

WARNING READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS FOUND IN THIS MANUAL BEFORE PERFORMING INSPECTION AND MAINTENANCE. Symbols and their meanings:

T: Necessary regular inspection item to hourmeter.

O: Only first replacement is performed.

Components

4: Inspection and/or maintenance is needed.

44: See page 4-10 for detail specification for lubricant, coolant, fuel and etc.

When

Item

Interval

required

Checking the level Engine oil

Prestart 8H

week

months months

50H

(First) 4

(First)

months

(Replacing

1000H

2000H

5000H

part)44

Engine oil

O O

Reference page

Cartridge

4-48 4-50 4-41

Replacing

O

Cartridge

O

Element O

Checking the level

Engine

etc.

O

Air cleaner Checking/Cleaning element Replacing

Fan belt

500H

Lubricant

12

3-5 4

Replacing

Water sepDraining arator

Radiator Coolant

250H

Every

O

Engine oil filter

Fuel filter

Every Every 3 Every 6

Element

O

4-54 4-52 3-4

Replacing

Sterile water

O

4-55

Checking leakage

O

3-5

Checking

O

3-8

Adjusting

O

4-49

Radiator core

O

4-29

Radiator cap

O

4-30

Hoses in cooling system Checking/Replacing Checking the colour, sound, smell of exhaust gas

O

4-51

O

3-15

Valve clearance

O

Injection timing Checking/Adjusting

4-56 O

Starter and generator Checking/Adjusting

O

Check and adjustment for contact surface of intake and exhaust valve

4-56

O

4-26

4-67

4-67

Hydraulic system

Fuel System Components

4. MAINTENANCE When

Item

Interval

required

Fuel Checking/Adjusting Fuel tank

Prestart 8H

Every Every 3 Every 6 week

months months

50H

250H

500H

Upper frame

etc.

months

(Replacing

1000H

Draining water and deposits

part)44

3-8

O O

Hydraulic Suction Cleaning/ tank strainer Replacing

O

Return filter Checking oil leakage and damage of cylinders, etc.

4

O

(First)

(Breaker attachment)

O

O

Hydraulic oil Strainer Element

O

Greasing for the slewing gear

4-60

O

N.L.G.I No.2 Lithium base 4-67 MoS2 grease (First)

O

Gear oil

O

O

4-40

O

4-40

Boom and Arm cylinder

O

Bucket

O

Replacing/Adjusting mount gap

O

Checking wear and damage of the tooth and side cutters

O

4-63

4-36

O

Bucket and Dozer

4-49

4-20

O

Checking oil leakage and wear of sprocket/travel reduction motor

4-57

Greasing

4

Checking

4-59

O

Travel reduction moReplacing tor

Checking wear and damage of rubber belt

3-5

4-39 O

Checking/Adjusting for tension of rubber belt

ence page

4-44

O

Checking Hydrauthe level lic oil Replacing

Greasing for pins

5000H

O

Checking leakage

Lower roller Idler

2000H

Refer-

3-7

Slewing bearing

Lower frame

Lubricant

12

O

Line filter In-line filter/Cleaning

Attachment

Every

Grease

4-42

Grease

4-47 4-33 4-32

4-27

Components

4. MAINTENANCE When

Item

Interval

quired

Electrical equipment

Checking damage of the electrical wirings

start 8H

Every Every 3 Every 6 week

months months

50H

250H

500H

Every

Lubricant

12

etc.

months

(Replacing

1000H

2000H

5000H

part)44

O

Reference page

4-38

Battery Checking the fluid level Measuring the specific gravity

O

Distilled water

4-45

Checking the function of warning lamps

O

3-9

Checking switches/levers

O

3-15

Replacing work lamp (Lamp)

Others

re-

Pre-

12V 55W (Halogen lamp)

O

4-31

Checking abnormal deformation and damage of the machine exterior

O

4-39

Checking looseness and missing of the bolts and nuts

O

4-39

O

3-15

Control lever

Checking Lubrication

O

Grease

4-28

4-38

4. MAINTENANCE

4.13

WHEN REQUIRED

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” before operating or servicing the machine.

A. RADIATOR CLEANING

WARNING ALWAYS ENSURE THAT ENGINE HOOD IS CORRECTLY LOCKED IN THE RAISED POSITION: DANGER OF PERSONAL INJURIES.

CAUTION Compressed air or pressure water jets will be used to perform this operation. Therefore, suitable clothing must be used to protect the body. In particular, wear glasses with side shields.

Keep people not involved in the maintenance work outside the working area.

1. Open the left side cover and the cover under the seat, referring to “GUARD WITH LOCKING DEVICE AND COVERS”, 2-21.

2. Check for clogged radiator fins.

3. Remove dust, mud and other material on the radiator cores and fins using compressed air.

NOTE: to avoid damage of the fins, keep a distance between the spray nozzle of compressed air and the fins.

If the fins get damaged, it will cause water leakage resulting in overheating.

4-29

4. MAINTENANCE B. CLEANING OR REPLACEMENT OF RADIATOR CAP

WARNING USE EXTREME CARE WHEN REMOVING THE RADIATOR CAP. THE COOLANT IS UNDER HIGH PRESSURE WHEN HOT. • NEVER REMOVE THE RADIATOR CAP WHEN THE SYSTEM IS HOT. • WAIT UNTIL THE ENGINE HAS COOLED DOWN, BEFORE REMOVING THE RADIATOR CAP.

CAUTION If the cap is not sufficiently tight, there might be the risk of burning, due to the spouting out of hot water or steam during operation.

1. Remove the radiator cap after the engine has cooled down to touchable with a bare hand. Slowly loosen the cap to release the inside pressure.

Remove the radiator cap after all pressure is released.

2. Check the cap for damages or dust contamination.

Clean it and/or replace it if needed.

3. Tighten the cap securely.

4-30

4. MAINTENANCE C. WORKING LIGHT A light bulb of 55W is used for the working light.

WARNING DO NOT TOUCH A BULB THAT IS LIT. SHUT OFF THE WORK LAMP. WORK LAMP BULB DEVELOPS HIGH TEMPERATURE DURING OPERATION. A BULB THAT HAS JUST BEEN SHUT OFF WILL REMAIN HOT FOR SOME TIME. ALLOW ENOUGH TIME FOR THE BULB TO COOL BEFORE HANDLING. BEFORE REPLACING A BURNED OUT BULB, MAKE SURE THE WORK LAMP SWITCH IS IN THE OFF POSITION.

NOTE: the service life of work lamp bulb is shortened if oil or grease etc. is on the bulb at the time of installation. When replacing the bulb hold it at the flange area.

Do not touch the bulb glass. If touched clean the bulb with a clean cloth.

If the replacement bulb does not light, check the fuse, see 2-22.

The following is the instruction for replacing the work lamp.

C.1 BULB REPLACEMENT 1. Place the bucket on the ground and set safety lock lever to “LOCKED” position, then stop the engine.

2. Disconnect the connector, then remove the working light from the boom with a wrench.

3. Remove the screws (1) (4 pieces), then remove the rim (2) and lens (3) from the housing (4).

4. Remove the spring (6) fixing the socket (5).

5. Remove the bulb (7) from the socket (5) and install a new one.

6. Assemble working light proceeding in reverse order as described above.

NOTE: pay attention not to break the light bulb during replacement. Hold the lens when removing the screw (1), otherwise, it falls off.

4-31

WORK LIGHT DETAILS

4. MAINTENANCE D. CHECK WEAR AND SLACKENING OF THE BUCKET TEETH TIPS AND SIDE CUTTERS

WARNING WHEN REPLACING A BUCKET TOOTH OR SIDE CUTTER, PLACE A BLOCK UNDER THE BUCKET. Check for wear and looseness of the bucket tooth points.

Tooth point life can not be determined only by the number of operating hours; operating conditions must also be considered.

1. Adapter 2. Tooth point

TOOTH TIP

3. Rubber lock pin 4. Locking pin 5. Adapter nose 6. Safety block 7. Hammer 8. Punching tool

D.1 REPLACING THE TEETH TIPS Replace the bucket teeth in the following cases.

•

When little holes appear on the teeth tips.

•

When the edge lines of the teeth tips are worn.

WARNING WEAR GOGGLES, SAFETY SHOES, HARD HAT, WORK CLOTHES AND WORK GLOVES TO PERFORM INSPECTION AND MAINTENANCE ON THIS MACHINE. 1. Using a hammer and punching tool, hammer out the locking pin. Be careful not to damage the rubber locking pin (3).

2. Inspect the safety pin (4) and the rubber pin (3).

Replace them if the locking pin (4) is too short or if the rubber pin (3) is worn.

3. Clean the surface of the adapter nose (1) with a putty knife to remove the soil stuck.

4. Fit the tooth tip (2) onto the adapter nose (1).

5. Push the rubber pin (3) in the hole of the adapter nose (1).

6. Insert the safety pin (4) until it aligns with the tips face.

4-32

4. MAINTENANCE D.2 REPLACING THE SIDE CUTTERS

WARNING WEAR GOGGLES, SAFETY SHOES, HARD HAT, WORK CLOTHES AND WORK GLOVES TO PERFORM INSPECTION AND MAINTENANCE ON THIS MACHINE. 1. Remove completely all sand and soil stuck on the capscrews. Use an acetylene torch to cut off the capscrews, then remove the side cutters (2).

2. Clean the mounting face and install a new side cutter (2). When replacing the side cutter, also replace the capscrews (3) and nuts (1).

Tightening torque: 115 ± 12 Nm (84.6 ± 8.7 lbf·ft) 3. After tightening the nuts (1), spot-weld them.

4. TOOTH POINT

E. REPLACEMENT OF BUCKET

WARNING •

•

THE BUCKET REPLACEMENT HAS TO BE CARRIED OUT ON A FIRM AND FLAT SURFACE. PAY CLOSE ATTENTION TO SAFETY. WHEN ALIGNING THE PIN BORES, DO NOT INSERT YOUR FINGER INTO THE BORES. IT MAY CAUSE SEVERE INJURY. ALWAYS USE SUITABLE TOOLS TO ALIGN HOLES.

4-33

4. MAINTENANCE E.1 REMOVAL OF BUCKET 1. Slightly operate the boom and the arm to remove load from pins (4) and (5) from the weight of the bucket.

2. Shift the O-rings (1) onto the bucket boss, so as not to damage it.

3. Disassemble the retainer rings (2) and the safety pins (3). Then take out pins (4) and (5) with the shims (10). Take off the bucket (6).

NOTE: pay attention not to let any sand or dust stick to the pins removed.

NOTE: pay attention not to damage the dust seals (9) installed on arm ends (7) and on bucket link (8).

4-34

4. MAINTENANCE E.2 INSTALLING BUCKET 1. Clean each pin and pinhole and grease sufficiently.

2. Move the bucket cylinder so as to match the pins bores (6) and bucket link bores (8). Then take out pins (4) with the shims (9).

3. Raise boom and bucket slightly from the ground.

4. Align bucket (6) with the bucket bores and arm bores (7). Then take out pins (5) with the shims (9).

5. Insert the safety pins (3) and snap rings (2) into dowels (4) and (5).

6. Return the O-ring (1) to normal position.

7. Apply grease in the grease nipples, until this oozes out from the spaces between pins and bores.

NOTE: replace broken or loose O-rings (1).

4-35

4. MAINTENANCE F. INSPECTING RUBBER CRAWLER Repair or replace rubber crawler under following condition.

For repairs or replacement of rubber crawlers, contact an authorized Dealer.

1. LOWER ROLLER 2. RUBBER CRAWLER 3. LUG 4. STEEL CORD 5. METAL CORE

F.1 HEIGHT OF LUGS 1. If the lugs (1) wears off in height “A”, traction force decreases. Replace the crawler (2) with a new one if its dimension “A” becomes thinner than 5 mm (0.2 in).

2. Replace the crawler (2), if the lug (3) is so much worn out, that the steel cord (1) is exposed over two links.

F.2 BREAKAGE OF STEEL CORD If the steel cords of the rubber crawler (1) are broken by more than one half of one side row, replace the crawler with a new one.

F.3 CRACK OF RUBBER CRAWLER If a crack “A”, developed to about 60 mm (2.4 in) length, is noticed between lug and crawler, repair the rubber crawler. However, repair the crawler immediately even though the steel cord is exposed, because of a small and short crack “B”.

“C” repair not yet required.

NOTE: for repairs or replacement of rubber crawlers, contact an authorized Dealer.

4-36

4. MAINTENANCE F.4 PEELING OFF OF METAL CORE ON RUBBER CRAWLER According to usage of the rubber crawler (3), there may occasionally be peeling off of metal core (2) (inner side), due to contact “A” with the lower rollers (1) and idler/sprocket, or because of the rubbing, even though there are no external damages or abrasion on the lug (outer side).

NOTE: the metal core can easily detach, if the rubber crawler is not used correctly.

See “CAUTION WHILE USING RUBBER CRAWLERS”, 3-33 to fully understand the correct use of the rubber crawler.

Note that the warranty is not valid if rubber crawlers are wrongly used or if their tension is inaccurate.

1. The cracked rubber crawler in which the metal core (1) shows off must be replaced.

2. The rubber crawler does not need to be replaced, if the contact surface (1) between metal core and roller is cracked.

NOTE: the metal core can easily detach, if the rubber crawler is not used correctly.

See “CAUTION WHILE USING RUBBER CRAWLERS”, 3-33 to fully understand the correct use of the rubber crawler.

4-37

4. MAINTENANCE G. LUBRICATION OF CONTROL LEVERS When a control lever becomes heavy to operate or does not move smoothly, apply grease to the sliding and rotating portion (4) and the top portion (5) of the universal joint (3).

1. Place the machine on a firm and level ground, and engage safety control lever on “LOCK” position.

Stop the engine, pull out the starter key.

2. Carefully raise up the rubber boot (2) and the control lever (1) paying attention not to damage them.

3. Apply grease on the sliding parts and on the 4 places of rotating portion (4) and the top (5) of the universal joint (3).

4. Set back the rubber boot (2) to the original position.

5. Check for any loose assembly of pilot valve. If loose retighten the socket bolts.

6. Contact the dealer/distributor for additional service.

H. CHECK ELECTRIC WIRING AND FUSES

WARNING •

•

•

IF SHORT CIRCUIT TRACES ARE NOTICED ON THE ELECTRIC WIRING, ADDRESS TO AN AUTHORIZED DEALER. BEFORE CHECKING THE ELECTRICAL SYSTEM, DISCONNECT THE NEGATIVE (–) BATTERY CABLE. SHORT CIRCUITING MAY CAUSE FIRE.

NOTE: refer to 2-22 for the replacement of fuses.

WARNING ALWAYS MAKE SURE TO INSTALL FUSES OF CORRECT AMPERAGE, TO AVOID OVERLOADING AND DAMAGING THE ELECTRIC SYSTEM.

4-38

4. MAINTENANCE

4.14

PRE-START (EVERY 8 HOURS) INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” before operating or servicing the machine. The following inspection and maintenance shall be carried out before and after start up and after work.

Refer to section 3 “MACHINE OPERATION”.

• CHECK COOLANT LEVEL

3-4

• CHECK ENGINE OIL LEVEL

3-5

• MACHINE OPERATION

3-18

• CHECK EACH SWITCH AND LEVER

3-15

• CHECK FUEL LEVEL

3-7

• CHECK HYDRAULIC OIL LEVEL

3-5

• CHECK FUEL LEAKS

3-8

• CHECK WORKING LIGHT

3-9

• INSPECT BELT CONDITION

3-8

• CHECK WARNING LAMPS

3-9

• EXHAUST GAS COLOUR, IRREGULAR NOISE AND SMELL 3-15

A. EXTERNAL VISUAL INSPECTION A dent or distortion which apparently seems not to be severe damage, may cause abnormal contact on internal parts or hoses.

Consult with the dealer/distributor for the judgement of necessity for the repair.

B. CHECK FOR DETACHED PIECES OR LOOSE FASTENINGS Check and make sure all capscrews and nuts are properly tight. Likewise, check and make sure all hose clamps are properly tight.

An abnormal sound during operation may cause leakage or fire. Use torque values from 4-14 and 4-16.

NOTE: use the tools suitable for the work referring to “ACCESSORY TOOLS”, 4-13.

C. VISUAL CHECK OF HYDRAULIC SYSTEM

WARNING THE HYDRAULIC OIL TANK IS UNDER PRESSURE. BE SURE TO RELEASE THE PRESSURE IN THE SYSTEM BEFORE STARTING SERVICE AND/OR MAINTENANCE, OR REFILLING. NEVER USE HANDS TO CHECK FOR POSSIBLE LEAKS. HIGH PRESSURE OIL LEAKS CAN PENETRATE THE SKIN AND CAUSE SEVERE INJURY.

4-39

4. MAINTENANCE Hydraulic oil leakage will slow down a machine. Move the machine to firm level ground and place the attachment in the oil check position and stop the engine.

1. Set the safety lock lever to “LOCKED” position, then stop the engine.

2. To check the location of leakage, allow the temperature on each portion of the machine to drop to around 40 °C (104 °F).

Wear protective glasses and gloves for the check.

3. Slowly loosen the cap (2) on the upper surface of hydraulic tank about half turn and release the pressure in the hydraulic tank.

1. HYDRAULIC TANK 2. CAP NOTE: if problems with the machine occur during operation, stop the machine immediately and contact the dealer/distributor for repairs.

If there is any engine oil, engine coolant, hydraulic oil or fuel leaks on the machine, or any system warning lamp is illuminated, contact the dealer/distributor for repairs.

D. CHECK OF TRAVEL REDUCTION UNITS AND ROLLERS 1. Check the lower roller (3), idler (6) and travel motor (1) for any leakage.

2. Check the lower roller, idler and sprocket (2) for abnormal wear and loosened bolts.

3. Slowly move the machine and check for any abnormal sound.

4. RUBBER CRAWLER 5. CRAWLER SLIDE NOTE: address to an authorized Dealer for advice and/ or repairs as needed.

4-40

4. MAINTENANCE E. DRAINING WATER FROM WATER SEPARATOR

WARNING • • •

WIPE OFF FUEL ON ANY PARTS OF MACHINE. DO NOT USE GASOLINE TO CLEAN FILTER ELEMENTS. DISPOSE OF WASTE FUEL PROMPTLY IN ACCORDANCE WITH GOVERNMENT ENVIRONMENTAL REGULATION.

1. Clean around the water separator.

2. Place a drip pan under the water separator.

3. Place the cock (1) in the “A” (Close) position to stop fuel flow.

4. Remove the ring nut (5) and remove the cap (4).

5. Drain the cup (4) and clear the element (2) with gas oil.

6. Paying attention to O-ring (3), install the cup (4) with the filter element (2) and secure it with the ring nut (5).

7. Bleed the water separator.

Refer to Bleeding water separator 4-19

WATER SEPARATOR

8. Place the cock (1) in the “B” (Open) position, and operate the engine at idling speed for several minutes.

9. Check water separator for leakage. If leakage is found, loosen ring nut (5) and check O-ring (3) for damage.

4-41

4. MAINTENANCE

4.15

50-HOUR (WEEKLY) INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” of this MANUAL before operating or servicing the machine.

Perform together with 8-hour (daily) work also inspection and maintenance.

A. ADJUSTMENT OF RUBBER CRAWLER TENSION Proper adjustment of the rubber crawler belt tension is essential for extending service life of the crawler belt and the travel system, and prevention of coming off of crawler belt due to insufficient tension.

WARNING THE CHECK AND ADJUSTMENT FOR THE TENSION OF THE RUBBER CRAWLER BELT IS DONE WITH A CRAWLER LIFTED OFF THE GROUND ONE SIDE AT A TIME. UNEXPECTED LOWERING OF THE MACHINE OR MOVEMENT OF THE MACHINE CAN RESULT IN SERIOUS INJURY OR DEATH. DO NOT OPERATE THE BOOM, ARM OR BUCKET / ATTACHMENT WHILE ADJUSTING THE RUBBER CRAWLER BELT. FOLLOW THE INSTRUCTIONS PROVIDED. THIS WORK MUST BE DONE CAREFULLY BY TWO PEOPLE. THE OPERATOR MUST OPERATE THE MACHINE AS INSTRUCTED BY THE SIGNALS OF THE PARTNER. Refer to 4-20 for check and adjustment of the rubber crawler tension.

RUBBER CRAWLER B. GREASING PINS AROUND BUCKET Greasing interval Generally the greasing is carried out every 50 hours of service.

1. Move machine to a firm and level ground. Lower the bucket to the ground.

4-42

4. MAINTENANCE 3. Clean the grease fittings before greasing. Replace if damaged.

4. Grease the pins using a grease gun as shown on the right (see arrows).

5. Properly wipe off any grease oozed out around the pin connection.

CAUTION Dispose of all hazardous waste in accordance with current legislation.

No.

GREASING POINTS

Q.TY

A

Bucket cylinder rod pin

1

B

Idler link/arm connecting pin

1

C

Bucket link pin

1

D

Arm/bucket connecting pin

1

E

Dozer cylinder foot pin

1

F

Dozer foot pins

2

4-43

4. MAINTENANCE C. SEPARATOR FILTER CLEANING

WARNING • •

STOP THE ENGINE BEFORE DRAINING FUEL FROM THE FUEL TANK (1).

THOROUGHLY WIPE OFF ANY SPILLED FUEL.

Loosen the drain plug to drain the water and deposits in an empty container.

Since the water is deposited during the night, it is effective to drain before starting up the engine in the morning.

Slew the upper structure of the machine so that the drain plug (2) comes to midway between the crawler belts of left and right.

Place a empty container under the drain plug (2) to catch the fuel discharged.

Slowly loosen the drain plug (2) to drain water mixed in and deposits together with the fuel.

When pure fuel begins to flow, tighten up the drain plug (2).

NOTE: check for fuel leakage after tightening up the drain plug.

If fuel is leaked, stop the engine and consult with the dealer/distributor for repair.

4-44

4. MAINTENANCE E. BATTERY CHECK The battery fluid easily decreases with high temperature in summer season. Check the battery fluid level in the morning before starting operation.

Continuous use of the battery with low fluid lowers battery performance. Check for the battery fluid level periodically, and if insufficient, refill the battery with distilled water before the engine start-up (before charging battery).

WARNING • FLAMMABLE GAS (HYDROGEN GAS) IS GENERATED IN THE BATTERY. DO NOT ALLOW SPARKS OR FLAMES TO COME IN CONTACT WITH BATTERIES TO AVOID TRIGGERING AND EXPLOSION. • BATTERY FLUID HAS STRONG ACID. IT CORRODES METAL VERY RAPIDLY. IF IT ADHERES ON SKIN OR ENTERS INTO EYE, IT CAUSES FOR A BURN OR BLINDNESS. • AT SUCH CASE, IMMEDIATELY WASH SKIN OR EYE WITH LOTS OF WATER, AND ASK A DOCTOR TO TREAT IT AS SOON AS POSSIBLE. • WEAR FACE SHIELD. Check the indicator (A) on the battery, and always keep it at blue colour. Red colour and white colour means insufficient battery fluid and battery charging.

1. CAP INDICATOR LIGHT (A)

2. TERMINAL 3. TERMINAL COVER A. INDICATOR INDICATIONS B. AIR VENT HOLE C. BLUE D. RED E. WHITE F. UPPER LIMIT G. LOWER LIMIT H. GOOD CONDITION I.

REFILLING REQUIRED

J. CHARGING REQUIRED 1. Set the safety lock lever to “LOCKED” position, then stop the engine.

2. Wear face protection.

3. Referring to “GUARD WITH LOCKING DEVICE AND COVERS”, 2-21, remove the floor mat and remove the cover of battery.

The battery is located under the floor plate.

4. Remove the caps (1) of each cell to check the fluid level.

5. If battery fluid level is low, refill the cell with distilled water up to the specified level, 10 ~ 15 mm (0.4 ~ 0.6 in) above the polar plate.

6. Make sure the air vent holes in the caps (1) are clean and securely tighten the caps (1).

4-45

4. MAINTENANCE 7. If the terminals (2) are dirty, wash it with warm water, then install it to the position applying grease or spraying rust preventive solution. If the terminal is oxidized, polish it with a wire brush or emery paper.

When it is difficult to obtain enough cranking speed at the engine start-up, check the battery fluid for its specific gravity. If it is insufficient, recharging is required for the battery.

Standard specific gravity for battery fluid: 1.28 [at 20 °C (68 °F)] For the specific gravity of battery fluid at cold climate or other specific conditions, refer to 3-37, and make the charging rate around 100%.

If it is difficult even though recharging is carried out, replacement of the battery to new one is required.

NOTE: measure the specific gravity of battery fluid with a gravimeter.

The measured value varies depending on the ambient temperature. Consult with our distributor for advise and/or repairs as needed.

4-46

4. MAINTENANCE

4.16

250-HOUR (3–MONTH) INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” before operating or servicing the machine.

Perform together with 8-hour (daily) work also inspection and maintenance.

A. ARMS AND ATTACHMENT LUBRICATION NOTE: under normal conditions apply grease every 250 service hours and all 6 months. Under particular working conditions, observe following lubrication intervals: •

When operating the machine with special attachments, apply grease to everyone of those devices before starting daily work.

•

For underwater digging, apply grease to the areas dipped in water ever day, before and after work.

•

Where the machine is stored for more than one month, apply grease before work.

1. Move the machine to a firm level area and place the attachment in the oil check position. Stop the engine.

NOTE: the dozer foot pin (3) is supported by an steel bushing. If the dozer blade is used often, grease the bushing.

DOZER BLADE GREASING POINTS 2. Clean the grease nipples before each application.

Replace if damaged.

3. Use table below for lubrication. (See illustration “DOZER BLADE LUBRICATION POINT” and illustration of “ATTACHMENT LUBRICATION POINT”).

Inject grease in the grease nipples of the links indicated by the arrows, until grease oozes out.

4. Properly wipe off any grease oozed out around the pin connection.

ARMS GREASING POINTS

NOTE: refer to page 4-42 for greasing bucket / attachment.

ARM CONNECTION GREASING POINTS

4-47

4. MAINTENANCE No.

GREASING POINTS

Q.ty No.

GREASING POINTS

Q.ty No.

GREASING POINTS

Q.ty

1 Dozer blade cylinder rod pin

1

2 Dozer blade cylinder foot pin

1

3 Dozer blade foot pins

1

4 Boom foot pin

1

5 Boom cylinder foot pin

3

6 Boom cylinder rod pin

1

7 Arm cylinder foot pin

1

8 Arm cylinder rod pin

1

9 Boom/arm connecting pin

2

10 Bucket cylinder foot pin

1

11 Bucket cylinder rod pin

1

12 Swing cylinder foot pin

1

13 Swing cylinder rod pin

1

14 Swing bracket/frame connecting pin

B. ENGINE OIL CHANGE

WARNING DO NOT CHANGE OIL IMMEDIATELY AFTER STOPPING THE ENGINE. THE ENGINE AND OTHER PARTS ARE VERY HOT AFTER BEING STOPPED. TO AVOID BURNS, ALLOW THE ENGINE TO COOL BEFORE DOING OIL CHANGE.

NOTE: the first oil change must be done at 50 hours for a new machine engine.

Place a container to catch drain oil.

Container to receive drained oil: 4.0 L (1.06 gal) or more capacity Oil volume to be refilled: 3.1 L (0.82 gal) (Upper limit of standard volume.)

1. Move the machine to a firm, level ground and run engine for 5 minutes if engine has been off for 1 or more hours to warm the oil. Stop the engine.

2. Under the engine loosen the cover plate bolts and remove the cover (2).

3. Clean around yellow oil filler cap (4), remove the cap (4).

4. Slowly loosen drain cap (1) so that the oil does not splash over yourself.

Make sure to contain any oil spillage.

5. Inspect the drained oil for metal particles or foreign materials. If any are found, contact the distributor.

6. Securely tighten the drain plug (1).

7. Fill with the specified engine oil through oil filler port (4) slowly.

Refer to 4-10 for the proper oil and oil quantity to use.

8. Install oil filler cap (4).

9. Before starting the engine, check the engine oil level using the dipstick (3). The level should be between the “H” and “L” limits as shown in the figure.

Start and run the engine for 5 minutes. Then stop the engine and check the oil level after 30 minutes.

Add oil if necessary to obtain the correct level.

10. Install under cover (2) just below the engine to the regular position.

4-48

2

4. MAINTENANCE C. GREASING THE SLEWING BEARING

WARNING NEVER SLEW THE MACHINE, WHILE FEEDING GREASE TO THE SLEWING BEARING. To grease the slewing bearing, add grease to each fitting provided at 90° of separation (4 places), around the bearing until grease comes out.

D. BELT TENSION ADJUSTMENT

WARNING ALWAYS ENSURE THAT ENGINE HOOD IS CORRECTLY LOCKED IN THE RAISED POSITION: DANGER OF PERSONAL INJURIES. DO NOT APPROACH WITH YOUR BODY BELTS OR ROTATING PADDLES. BE PARTICULARLY CAUTIOUS NEAR FANS (ALTERNATOR AND COOLER FAN).

Check the fan belt for its tension, wear conditions and damages.

Be sure to adjust tension properly.

D.1 FAN BELT ADJUSTMENT 1. Slightly loosen attaching bolt (1) and adjusting bolt (2).

2. Loosen adjusting bolt (3), adjust the fan belt to the specified tension, and tighten attaching bolt (1) and adjusting bolt (2).

3. After adjustment, run engine at low idling for about 5 minutes, then check the tension of belt.

4-49

4. MAINTENANCE E. REPLACEMENT OF ENGINE OIL FILTER

WARNING THE ENGINE AND MUFFLER STAY HOT AFTER STOPPING ENGINE. ALLOW ENOUGH TIME FOR THE ENGINE TO COOL BEFORE INSPECTION OR MAINTENANCE TO AVOID BEING BURNED.

NOTE: the oil filter is a cartridge-type filter, that cannot be re-used or cleaned.

On a new machine replace this filter after the first 50 service hours.

The filter wrench provided on the machine is used for removing.

1. Stop the engine, and open the engine door, and remove the lower cover.

2. Place the filter wrench (2) on the filter cartridge (1), and turn the wrench with wrench turning counterclockwise to remove it.

3. Wipe off any dirt on the seal face of filter base, and avoid contamination.

4. Apply a thin coating of engine oil to the seal of the new oil filter. Install and tighten by hand turning about 2/3 of a turn after the seal contacts the engine.

5. Start and run the engine at low idle for 5 minutes to check for leaks.

6. Close the engine door and install the cover under the engine.

NOTE: if the machine is operated in dusty environments, respect a shorter interval of replacement.

If some metal particles are found on the removed cartridge, consult your authorized Dealer.

CAUTION Dispose of all hazardous waste in accordance with current legislation.

4-50

REPLACEMENT OF ENGINE OIL FILTER

4. MAINTENANCE F. CHECKING RADIATOR HOSES Regular inspection of radiator hoses is recommended to avoid machine break downs. Replace cracked, damaged, worn or leaking hoses. This will prevent problems such as engine overheating or other serious damage.

1. Check the hoses for water leakage due to loose clamps or cracked and worn hoses.

2. Tighten any loose clamps and replace any cracked or worn hoses following the procedures below.

G. REPLACING RADIATOR HOSES

WARNING AVOID BEING BURNED BY HOT LIQUID AND STEAM. DO NOT LOOSEN THE RADIATOR CAP WHEN THE COOLANT IS HOT. THE COOLING SYSTEM IS UNDER PRESSURE. STOP THE ENGINE AND ALLOW ENOUGH TIME FOR SYSTEM TO COOL. 1. Loosen the radiator cap (1) slowly. Ensure that pressure has been released. Push the cap down and hold it down while turning to remove.

2. Remove the cover located under the radiator, and loosen the drain plug (2). Then drain the coolant into a suitable container.

3. Loosen the hose clamp and disconnect the damaged hose. Replace it with a new one.

4. Install the drain plug.

5. Fill the radiator (3) with coolant, then fill the reservoir (4) with coolant, refer to 3-4.

6. After filling, tighten the radiator cap securely.

7. Install the lower cover to original position.

4-51

4. MAINTENANCE H. CHECKING/CLEANING/REPLACING AIR CLEANER ELEMENT

WARNING WEAR PROTECTIVE GLASSES OR GOGGLES WHEN USING COMPRESSED AIR. NOTE: •

The air cleaner clogging lamp will not illuminate if the element is torn or if the air cleaner housing is not sealed properly. If “AIR CLEANER CLOGGING” lamp is illuminated, inspect, clean, and/or replace the air cleaner elements.

•

When replacing element, cover the engine intake port to prevent the entry of dust.

NOTE: cleaning and replacement of outer element and inner double one.

•

Cleaning When warning is indicated on multi display.

•

Replacement After cleaning for the 6th time or with a 1 year elapse (1000 hours).

AIR FILTER REPLACEMENT

ELEMENT

CLEANING

OR

1. Release two clamps (2) from the air cleaner cover.

2. Remove the air cleaner outer element (1) from the housing.

3. Clean the inside of air cleaner casing.

4. To clean the outer element (1), blow compressed air [less than 0.3 MPa (43 psi)] up and down along the folds of the filter element interior to remove clogged dust or other contaminants.

5. After cleaning, use a light to check the inside of the element for tearing, pinholes, or packing damage.

Replace with a new element if necessary.

6. Set outer element (1) in the casing.

7. Install the cover on two clamp (2) positions, directing the mark “TOP” on the cover to the inlet side.

NOTE: avoid water getting inside the engine make sure the O-ring seal is positioned correctly.

8. Check the element for tearing, pinholes or packing damage. Even if the damage is found within 6 times of cleaning, replace the element with a new one.

4-52

4. MAINTENANCE I. GREASING FOR SLEWING GEAR 1. Place attachment and dozer blade in posture of lubrication and stop engine.

2. Before lubrication, clean grease nipple and replace it if required.

3. Using grease gun and lubricate grease nipple (1) with specified grease.

4-53

4. MAINTENANCE

4.17

500-HOUR (6-MONTH) INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” before operating or servicing the machine. Perform this operation at the same time of inspection and maintenance, that have to take place every day and after 250 service hours.

A. REPLACEMENT OF FUEL FILTER

WARNING •

•

THE ENGINE AND MUFFLER STAY HOT AFTER STOPPING ENGINE. ALLOW ENOUGH TIME FOR THE ENGINE TO COOL BEFORE INSPECTION OR MAINTENANCE TO AVOID BEING BURNED. TO AVOID THE POSSIBILITY OF A FIRE, WIPE ALL FUEL SPILLED.

NOTE: the fuel filter is not serviceable. Replace it with a new one.

1. Stop the engine, open the engine door, and remove the lower cover.

2. Place the filter wrench on the filter cartridge (1), and turn the wrench (2) with wrench turning counter-clockwise (A) to remove it.

3. Wipe off any dirt on the seal face of filter base to avoid contamination.

FUEL FILTER REMOVAL 4. Apply a thin layer of engine oil on the seal (3) of the new cartridge. Insert the cartridge and tighten it by hand. Then retighten it of about 2/3 of turn.

5. Start up the engine, and operate it at idling for several minutes to check for any leakage at the installing face.

6. Close engine hood.

CAUTION Dispose of all hazardous waste in accordance with current legislation relevant to the environment.

4-54

4. MAINTENANCE

4.18

1000-HOUR (12-MONTH) INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” before operating or servicing the machine.

Perform this operation at the same time of inspection and maintenance, that have to take place every day and after 500 service hours.

A. REPLACEMENT OF COOLANT

WARNING AVOID BEING BURNED BY HOT LIQUID AND STEAM. DO NOT LOOSEN THE RADIATOR CAP WHEN THE COOLANT IS HOT. THE COOLING SYSTEM IS UNDER PRESSURE. STOP THE ENGINE AND ALLOW ENOUGH TIME FOR SYSTEM TO COOL.

WARNING ENGINE ANTI-FREEZE/COOLANT LIQUID IS FLAMMABLE AND CAN CAUSE INJURY. • KEEP ANTI-FREEZE /COOLANT LIQUID AWAY FROM FLAMES AND SPARKS. • AVOID CONTACT WITH EYES AND SKIN. IF ANTI-FREEZE /COOLANT CONTACTS EYES OR SKIN, IMMEDIATELY WASH WITH CLEAN WATER FOR SEVERAL MINUTES AND SEEK MEDICAL TREATMENT. To prevent the system from rusting or freezing, use genuine anti-freeze / coolant.

See page 4-10.

To prevent the system from rusting or freezing, a mix of 50% or more is recommended.

Adjust the mixture to the lowest expected ambient / outdoor operating temperature.

1. Stop the engine. Open the engine door. Wait for the cooling system to cool before servicing.

2. Loosen the radiator cap (1) slowly. After ensuring that the pressure has been released, push the cap down and hold it down while turning to remove.

3. Drain the coolant through a hose into an empty container.

4. After draining, install the drain plug (2). Then fill the cooling system with the mixture of water and system cleaner.

4-55

4. MAINTENANCE 5. Operate the engine at a speed slightly faster than low idling (6) to raise the coolant temperature to 80 °C (176 °F) or within white range on the temperature gauge for coolant temperature. Operate the engine for approximately 10 minutes.

6. Stop the engine. Allow the system to cool. Loosen the radiator cap slowly. After ensuring that the pressure has been released, push the cap down and holding it down while turning to remove. Loosen the radiator drain plug (2). Flush the radiator (3) with clean water until the water draining becomes clear.

7. Install the radiator drain plug (2). Fill the radiator with a mix of 50% clean water and 50% LONG LIFE COOLANT. Start and run the engine for a while to fully release air from the cooling system.

8. Stop the engine. Allow the engine to cool. Check the coolant level (the reservoir tank (4) water level should be between FULL and LOW). Refer to 3-4.

Adjust level is to specifications.

9. Check the system for leaks. Repair all leaks. Close the engine door.

NOTE: it is recommended that the following service work be done by a qualified service professional. Specialized product knowledge and training is important to successfully perform this service. Contact the dealer/ distributor to obtain qualified service.

B. CHECKING AND ADJUSTMENT FOR VALVE CLEARANCE This is to correct the time lag at which exhaust and intake valves open and close. If this maintenance operation is ignored, faults may occur.

C. CHECKING AND ADJUSTMENT FOR STARTER AND GENERATOR (DYNAMO) There is a possibility of worn-out brushes and/or lack of grease lubrication on bearing.

This is of the adjustment to get good start ability and power generation.

4-56

4. MAINTENANCE D. REPLACEMENT OF HYDRAULIC RETURN FILTER The return filter keeps the hydraulic oil clean by removing any foreign material that may be in the oil. This will prevent the hydraulic equipment from becoming damaged and prolong the equipment’s life. Thus, since the return filter is a very important part, treat it with care.

WARNING •

•

•

AVOID BURNS. DO NOT CHANGE OIL OR FILTER ON A MACHINE THAT HAS JUST STOPPED OPERATING. ALLOW THE MACHINE TO COOL UNTIL OILS AND FLUIDS ARE WARM, NOT HOT. RELEASE HYDRAULIC TANK PRESSURE, BEFORE WORKING WITH ANY HYDRAULIC COMPONENT, ACCORDING TO THE PROCEDURES PROVIDED BELOW. WHEN REPLACING ANY HOSE OR SEALS, MAKE SURE THE ATTACHMENTS ARE SECURED TO AVOID SUDDEN MOVEMENT OF ATTACHMENT. SLOWLY REMOVE BOLTS TO RELEASE ANY HYDRAULIC PRESSURE DURING DISASSEMBLY.

1. Move the machine to a firm level area and place the attachment in the oil check position. Stop the engine.

2. Remove the left side cover (1).

3. Clean dirt from the filter to avoid contaminating the hydraulic system.

HYDRAULIC OIL CHECK POSITION

4-57

4. MAINTENANCE 4. Slowly loosen the cap (2) about half turn to release the inside pressure.

5. Remove bolt (5) and cover (4) from the side surface of the tank.

6. Take out element (6) out from the tank.

7. Replace O-ring (3) fitted on the face of cover (4).

8. Clean the parts taken out with light oil.

9. Install element by the reverse procedures of items (5) and (6) above-mentioned.

10. Install cover (4).

Tightening torque: 23.5 ± 2 Nm (17 ± 1.4 lbf•ft) 11. Start and run the engine at idle. Moving the machine controls to remove air from the system. Then place the machine in position to check the oil level.

Stop the engine and check the oil level adding oil if need.

12. Install the left side cover (1).

NOTE: machine equipped with a breaker attachment reduce the hydraulic oil life. A reduced service hours interval must be followed. Refer to the service interval specified on page 7-11.

4-58

4. MAINTENANCE

4.19

2000-HOUR INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” before operating or servicing the machine. Perform this operation at the same time of inspection and maintenance, that have to take place every day and after 1000 service hours.

A. OIL CHANGE IN HYDRAULIC OIL TANK AND CLEANING OF SUCTION STRAINER

WARNING DO NOT CHANGE OILS OR FILTERS ON A MACHINE THAT HAS JUST FINISHED WORKING. ALLOW MACHINE TO COOL FIRST UNTIL OILS AND FLUIDS ARE WARM, NOT HOT. RELEASE HYDRAULIC TANK PRESSURE BEFORE WORKING WITH ANY HYDRAULIC COMPONENT. Container to receive drained fluid: 20 L (5.3 gal) or more capacity Volume to be filled in: 9 L (2.4 gal) 1. Slew the machine so that the hose (1) on the hydraulic oil tank comes to midway between the both crawlers.

2. Remove the left side guard.

3. Carry out the work in the same procedure referring to items [2] to [4] in 4-57, 4-55.

4. Release the remaining pressure of the hydraulic tank, remove the cap (2).

5. Put a oil pan (8) under the hose (1). Loosen the union nut of the hose (1), and drain the remaining oil.

6. Tighten the union nut of the hose (1).

Tightening torque: 73.5 ± 5 Nm (54.2 ± 3.7 lbf•ft) NOTE: •

When loosening the hose (1), avoid contact with oil.

•

Do not drop tools or nuts / bolts, etc. into hydraulic tank.

NOTE: dispose of all hazardous waste in accordance with government environmental regulations.

4-59

4. MAINTENANCE 7. Remove the suction strainer (5).

8. Remove any dirt, etc. adhered on suction strainer (5) and wash it with cleaning solvent. If suction strainer (5) is damaged, replace it with a new one.

9. Check the bottom of strainer (5) and O-ring (6) for possible damage. When it is worn or damaged, replace it with a new one.

10. Insert and fit suction strainer (5).

11. Fill the hydraulic oil tank with the hydraulic oil at filling port (F) referring to the item “LUBRICANT, FUEL AND COOLANT SPECIFICATIONS”.

See page 4-10.

12. Install cover (7) with bolts (8) and lock washers.

Tightening torque: 23.5 ± 2 Nm (17 ± 1.4 lbf•ft) 13. Install the right side guard.

14. Start the engine and run it for 5 to 7 minuets at low idling speed. Operate each cylinder though its full travel and the slewing operation to remove any air from the hydraulic system. Return the machine to the hydraulic oil level check position.

15. Stop the engine and check the oil level and add oil as necessary.

B. CLEANING OF PILOT VALVE AND SOLENOID VALVE LINE FILTERS

WARNING •

•

•

THE HYDRAULIC OIL TANK IS UNDER PRESSURE. DO NOT CARRY OUT ANY CHECK AND SERVICING BEFORE RELEASING THE INSIDE PRESSURE. TO RELEASE INSIDE PRESSURE IN THE HYDRAULIC OIL TANK, DEPRESS RUBBER CAP ON THE TANK SEVERAL TIMES (5 TO 7 TIMES).

ESCAPING FLUID UNDER PRESSURE CAN PENETRATE THE SKIN CAUSING SEVERE INJURIES.

The right and left pilot valve and solenoid valve are equipped with a filter adapter. Dirt in the filter decreases oil flow. If dust, etc. enter in the valve it may cause trouble. Take out and clean filter, regularly.

4-60

4. MAINTENANCE 1. Bring throttle control lever to minimum speed, stop the engine and remove starter key, then position safety lock lever on “LOCK”.

2. Carry out the air releasing for the hydraulic line referring to 4-18.

3. Loose the 2 screws (3) of the gear box and remove the cover.

4. Disconnect first hose (1) connected to “P” port of pilot valve (4). Then remove connector with filter (2).

After removal, plug the bore to prevent entry of foreign matters.

5. Wash and clean the filter with diesel fuel and use compressed air to remove dust.

6. Inspect O-rings (5) for damage or excessive wear, replace them if necessary.

7. After cleaning, carry out reassembly, in the reverse order as described under [3] and [4].

Refer to 4-16 for the tightening torque for connector and hose.

8. Remove the left-hand guard (8).

9. Prior to removing the in-line filter assembly, remove the hose (9). Use caps and plugs on the hose to avoid contamination.

4-61

4. MAINTENANCE 10. Remove the in-line filter assembly (7).

11. Remove the adapters (7b) and (7d), then remove filter (7c).

12. Dust and dirt are accumulated outside the filter (7c).

Make sure clean properly to avoid contamination.

13. Check the O-rings (7a) and (7e) for damages, and replace them with new ones, if damaged.

14. After cleaning, assemble the filter (7c) with the adapter (7d), then install the assembly to adapter (7b).

15. Install the in-line filter assembly.

16. Removing plastic plug from the hose (9), install it to the elbow (7f). Attach the floor plate and floor mat, then pressurize the hydraulic line.

17. Then elbow with filter (9) of pilot valve (10) for travelling is removed for cleaning.

18. Remove the floor mat and floor plate. Disconnect the hose (11) connected to “P” port on the pilot valve (10) first, then remove the elbow (9). After the removal, put a plug to the bore to prevent entry of foreign matter.

19. Dust tends to accumulate on the inside elbow (9) (dented portion). Clean parts to avoid contamination (projected portion).

20. Check the O-ring (12) for damages, and replace it with a new one, if damaged.

21. After the cleaning, install it to the original position in the reverse order of the above removal. Refer to 4-16 for the tightening torque for the hose (11).

22. Install the floor mat and floor plate.

4-62

4. MAINTENANCE C. OIL CHANGE FOR TRAVEL REDUCTION UNIT

WARNING OIL IN THE TRAVEL MOTOR IS HOT IMMEDIATELY AFTER OPERATION. ALLOW THE OIL TO COOL BEFORE STARTING ANY SERVICE TO AVOID BEING BURNED BY CONTACT WITH HOT OIL. THERE MAY BE PRESSURE IN THE TRAVEL MOTOR WHEN HOT. ALLOW THE OIL TO COOL BEFORE REMOVING THE PLUG TO AVOID BEING STRUCK

BY THE PLUG. ALWAYS LOOSEN THE PLUG SLOWLY AND WEAR A FACE SHIELD. Container to receive drained oil: 1.0 L (0.26 gal) or more capacity Oil volume to fill: 0.7 L (0.18 gal) -LH/RH each For new machines change the oil after the first 50 hours of operation.

1. Set the machine on a level ground so that the DRAIN port (1) comes just to the bottom.

2. Place a container under the DRAIN port (1) to collect oil.

3. Slowly remove the FILLING (2) and LEVEL (3) plugs with an Allen wrench.

Then remove the plug of DRAIN port (1) to discharge oil into the container.

4. Apply sealing (teflon) tape on the thread of DRAIN plug (1), and securely tighten it.

5. Slowly fill with oil through FILLING port (2), until oil comes out from LEVEL port (3). See “LUBRICANT, FUEL AND COOLANT SPECIFICATIONS”, 4-10 for the applied gear oil.

DRAIN OIL 6. Apply sealing (teflon), tape on the threads of LEVEL (3) and FILLING (2) plugs, then re-tighten them.

Thoroughly wipe off oil residuals.

7. Confirm no oil leakages travelling the machine slowly.

NOTE: check used oil. If any metal particles are mixed in it, address to an authorized Dealer.

FILL OIL

4-63

4. MAINTENANCE D. OIL CHANGE FOR LOWER ROLLER AND IDLER ADJUSTER

WARNING •

•

GREASE IN CRAWLER TENSIONING MECHANISM IS UNDER EXTREME PRESSURE AND CAN PENETRATE SKIN CAUSING SEVERE INJURY. KEEP FACE AND BODY AWAY FROM GREASE FITTING AREA. DO NOT LOOSEN GREASE FITTING MORE THAN ONE TURN. IF GREASE DOES NOT RELEASE AFTER ONE TURN OF THE FITTING, CALL OUR DEALER/DISTRIBUTOR FOR ASSISTANCE. 1. TRAVEL MOTOR 2. SPROCKET 3. LOWER ROLLER 4. CRAWLER BELT 5. CRAWLER SLIDE 6. IDLER

All idlers have to be removed from the crawler frame to change the gear oil in each of them. The following is to describe the procedures to remove/reinstall, and the gear oil change for each of them. Refer to 4-10 for the oil and grease specification and the required volume.

4-64

4. MAINTENANCE D.1 LOWER ROLLER OIL CHANGE 1. Loosen the rubber crawler of the side to change the engine oil.

2. The fixing capscrews (1) of lower roller is a bit loosened in advance. (around one turn) 3. Start up the engine, and lift up one side of the machine, with boom and arm getting down the back side of bucket to the ground.

4. Support the machine with a safety support (S), etc., then stop the engine.

5. Remove the capscrews (1) with washers (2) which are provided to install the lower roller to the crawler frame at two positions of inside and outside. Then remove the lower roller (3).

6. Remove the feeding port plug (4) with the allen wrench, and discharge the old engine oil.

7. Fill in the specified volume (60 cm3 or 3.7 cu.in) of engine oil through the feeding port.

8.

Apply a sealing (teflon) tape to thread on the plug (4), and securely tighten it. Thoroughly wipe off oil adhered to periphery.

9. Apply Loctite #262 to thread on the capscrews (1), and temporarily install the lower roller (3) to the crawler frame.

10. Remove the safety support which supports the machine to get down the machine to the ground, then tighten up the capscrew (1).

Tightening torque: 115 ± 2 Nm (85 ± 1 lbf.ft) 11. Again lift up the machine to adjust the crawler tension referring to page 4-22.

IMPORTANT: The collars (5) are available for the rubber and steel crawler by changing the installing direction.

(R): Rubber crawler Fit the collar (5) to the frame directing the groove to lower side.

(S): Steel crawler Fit the collar (5) to the frame directing the groove to upper side.

4-65

4. MAINTENANCE D.2 IDLER ADJUSTER OIL CHANGE Before removing / installing crawler belts, refer to clause 4-10 on page 4-20 for the removal / installation instructions. To service idlers, remove crawler belts.

WARNING THE CHECK AND ADJUSTMENT FOR THE TENSION OF THE RUBBER CRAWLER IS DONE WITH A CRAWLER LIFTED OFF THE GROUND ONE SIDE AT A TIME. UNEXPECTED LOWERING OF THE MACHINE OR MOVEMENT OF THE MACHINE CAN RESULT IN SERIOUS INJURY OR DEATH. DO NOT OPERATE THE BOOM, ARM OR BUCKET / ATTACHMENT WHILE ADJUSTING THE RUBBER CRAWLER BELT. FOLLOW THE INSTRUCTIONS PROVIDED. THIS WORK MUST BE DONE CAREFULLY BY TWO PEOPLE. THE OPERATOR MUST OPERATE THE MACHINE AS INSTRUCTED BY THE SIGNALS OF THE PARTNER. 1. Remove the rubber crawler belt referring to 4-20 to 4-24. Place a safety support under the machine.

Stop the engine.

2. Remove the idler (1) and adjuster (2) from the crawler frame.

Weight of idler + Idler Adjuster = approximately 40 kg (88 lb) 3. Remove the fill / drain plug (3) with Allen wrench to drain old gear oil.

4. Fill the idler with [80 cm3 (0.085 qts.)] of the specified oil through the fill / drain port.

GREASING POINTS 5. Apply a sealing (teflon) tape to the threads on the plug (3), and securely tighten it. Wipe off any remaining oil.

6. Apply grease to the sliding face (A) on the piston (4) and cylinder (5) of the idler adjuster (2).

7. Install the idler so that the fill / drain port plug (3) of idler and the grease fitting (6) of idler adjuster (2) are facing to outside.

8.

Install the rubber crawler belt referring to 4-25.

9. Adjust the tension on the rubber crawler belt referring to 4-22. After the confirmation for the engagement of rubber crawler belt with the idler and the conditions for tension, raise the machine off the safety support, remove the safety support and slowly lower the machine to the ground.

4-66

IDLER

4. MAINTENANCE E. REPLACEMENT OF GREASE IN SLEWING GREASE BATH If the machine is operated in high water conditions such as in rivers with water level close to the slewing gear / bearing, water may become mixed with the grease causing it to deteriorate. Continued operation of the machine with grease deteriorated by water will cause damage to the slewing gears and bearing. Contact the dealer/distributor for inspection and advice about changing the grease.

1. CRAWLER SLIDE 2. SLEWING GEAR / BEARING A. SURFACE OF WATER B. RIVER BED C. GREASE NOTE: it is recommended that the following service work be done by a qualified service professional. Specialized product knowledge and training is important to successfully perform this service. Contact the dealer/ distributor to obtain qualified service.

F. INJECTION SEQUENCE CHECK AND ADJUSTMENT The adjustment of the fuel injection sequence is aimed to optimize the engine power and machine performance.

G. CHECK AND ADJUSTMENT OF CONTACT SURFACES OF SUCTION AND DRAIN VALVE This is to ensure the tightness of the suction and exhaust valves, in order to optimize the engine power and performance.

4-67

4. MAINTENANCE

4.20

5000-HOUR INSPECTION AND MAINTENANCE

Thoroughly read and understand the chapter “SAFETY PRECAUTIONS” of this MANUAL before operating or servicing the machine. Perform together with 8 to 1000-hour inspection and maintenance.

A. HYDRAULIC OIL CHANGE

WARNING AVOID INJURY Do not change oils or filters on a machine that has just finished working. Allow machine to cool first until oils and fluids are warm, not hot.

Release hydraulic tank pressure before working with any hydraulic component.

Container to receive drained fluid: 20 L (5.3 gal) or more capacity Volume to be filled in: 9 L (2.4 gal) 1. Slew the machine so that the hose (1) on the hydraulic oil tank comes to midway between the both crawlers.

2. Remove the left side guard.

3. Carry out the work in the same procedure referring to items [2] to [4] in 4-57, 4-55.

4. Release the remaining pressure of the hydraulic tank, remove the cap (2).

5. Put a oil pan (4) under the hose (1). Loosen the union nut of the hose (1), and drain the remaining oil.

6. Tighten the union nut of the hose (1).

Tightening torque: 73.5 ± 5 Nm (54.2 ± 3.7 lbf•ft) IMPORTANT: When loosening the hose (1), avoid contact with oil.

Do not drop tools or nuts / bolts, etc. into hydraulic tank.

IMPORTANT: dispose of all hazardous waste in accordance with government environmental regulations.

4-68

4. MAINTENANCE 7. Fill the hydraulic oil tank with the hydraulic oil at filling port (F) referring to the item “LUBRICANT, FUEL AND COOLANT SPECIFICATIONS”.

See page 4-10.

8. Install the right side guard.

9. Start the engine and run it for 5 to 7 minuets at low idling speed. Operate each cylinder though its full travel and the slewing operation to remove any air from the hydraulic system. Return the machine to the hydraulic oil level check position.

10. Stop the engine and check the oil level and add oil as necessary.

4-69

4. MAINTENANCE

4.21

INSPECTION AND MAINTENANCE TABLE

MACHINE MODEL:______________ SERIAL No.:________________ MACHINE HOURS:__________________

REF.

OK

MAINTENANCE PERFORMED

REF.

OK

ENGINE OIL LEVEL CHECK

SLEWING REDUCTION OIL

ENGINE COOLANT LEVEL

SLEWING RING GEAR

CHECK FOR FLUID LEAKS

GREASE BATH LEVEL

CHECK BELT TENSION

SLEWING RING PINION

CHECK FUEL LEVEL

SLEWING RING SEAL

WATER SEPARATOR DRAIN

SWIVEL JOINT SEAL

CHECK AIR CLEANER

DRAIN WATER FROM BATH

CHECK ENGINE ELECTRICAL

GREASE SLEWING RING

DRAIN WATER FROM FUEL

CHANGE GREASE BATH

CHANGE ENGINE OIL

CHECK BOLTS/HARDWARE

CHANGE OIL FILTER

CHECK LINES FOR DAMAGE

CHANGE FUEL FILTER

CHECK STEPS

CHANGE WATER SEPARATOR

CHECK FRAME STRUCTURE

CHECK AIR INTAKE INDICATOR

CHECK CRAWLERS

CHECK FAN ASSEMBLY

CHECK SPROCKET WEAR

CHECK BELT TENSIONER

CHECK IDLER WEAR

CLEAN RADIATOR

CHECK ROLLER WEAR

CHANGE ENGINE COOLANT

CHECK CRAWLER TENSION

CHANGE AIR CLEANER ELEMENTS

ADJUSTING CRAWLER TENSION

ADJUST VALVE CLEARANCE

TRAVEL REDUCTION UNIT

HYDRAULIC OIL LEVEL

BOOM / ARM CHECK

CHECK HYDRAULIC FUNCTIONS

BUCKET TEETH

CHECK FOR OIL LEAKS

SIDE CUTTERS

CHECK HOSES / LINES

GREASE BOOM PINS

CLEAN SUCTION SCREEN

GREASE ARM PINS

CHANGE RETURN FILTERS

GREASE BUCKET PINS

PILOT MANIFOLD FILTER

GREASE SWING PIN

CHANGE HYDRAULIC OIL

GREASE DOZER PIN

CLEAN HYDRAULIC TANK

CHECK COOLANT ADDITIVE

INSPECT ALL WIRING

CHECK CRAWLER

MAINTENANCE PERFORMED

BATTERY ELECTROLYTE BATTERY SERVICE HYDRAULIC FUNCTION OPERATION CHECK SWITCHES CHECK WARNING LIGHTS CHECK HORN CHECK DISPLAY MONITOR

This item is not included in the machine equipment as per specifications.

MECHANIC: SIGNATURE:

DATE:

4-70

5. TRANSPORTATION

5-1

5. TRANSPORTATION

5-2

5. TRANSPORTATION

5.1

TRANSPORTATION PLANS

•

When preparing to transport the machine, refer to the chapter 6. “SPECIFICATIONS” and check the total weight, height, width, length, travelling speed, ground pressure, etc.

•

Obtain the width of roads, bridges, road surface conditions and traffic conditions for transportation.

•

Obtain any permits required from proper government agencies for the machine transportation.

A. LOADING/UNLOADING THE MACHINE

WARNING • • • •

Slow speed travelling is necessity to load and unload the machine.

It is hazardous to use the attachment for loading and unloading the machine. Do not use the attachment for loading and unloading.

Use only the travelling controls when the machine is on the ramp.

Be prepared for a change in the machine position as the machine travels up or down the ramp. The machine may rock forward or rearward as the machine center of gravity changes when travelling on the ramp or on the border between the crawler/trailer and the ramp.

Refer to section “TRANSPORTATION, 1-46” for caution on loading/unloading the machine.

B. USE OF A RAMP 1. The width and height of the loading area (earthen bank or loading platform ramp) must be high enough to match the trailer and wide enough to match the width of the machine and trailer, or wider.

2. The loading area surface must be able to support the weight of the machine to avoid a machine rollover. Make sure the loading area surface will support the weight of the machine, making improvement or repairs as necessary.

3. When loading the machine onto the truck: •

Machine with attachment.

Drive onto the truck front of machine first.

•

Machine without attachment.

Drive onto the truck rear of the machine first.

4. Position the machine on the truck/trailer for safe tie down and weight distribution.

The ramp slope should be 15° or less.

5-3

5. TRANSPORTATION C. SECURING THE MACHINE After the machine is loaded and positioned, fix the machine by the following procedures.

1. Lower the dozer blade.

2. Slowly position the bucket or attachment on the truck/trailer bed.

3. Tie down the machine A. HEIGHT B. LENGTH 4. Verify by measuring the weight and length that transport regulations are met.

NOTE: to prevent damaging the bucket cylinder during transportation, apply a wooden block under the bucket link edge, so that it does not lean directly on the floor.

5. Pull up the safety lock lever and place it in “LOCKED” position “B”.

6. Turn OFF all switches and pull out the starter key.

Lock all covers and the cab door (if equipped).

7. Position blocks at the front and rear of the crawler belts and secure them. This will prevent the machine from moving during transport.

8. Position a block under the excavator arm to support during shipping.

9. Tie down the machine using rigging sufficient for safe transport.

1. WIRE ROPE / CHAIN A. PAD TO PROTECT EDGE B. LOCKED POSITION (UP)

BLOCK EXCAVATOR ARM DURING SHIPPING

5-4

5. TRANSPORTATION

5.2

LIFTING PROCEDURES FOR THE COMPLETE MACHINE

DANGER •

•

•

•

•

Wire rope or chain used for lift the machine must be of sufficient weight lifting capacity for this machine.

Improper lifting method or rope/chain rigging may cause unexpected movement or slip of the machine when lifted, resulting in serious injury or death or damage to the machine.

When lifting the machine operate the controls, slowly and smoothly avoiding any sudden/fast control movement for safety of people involved and lift rigging.

When the machine is lifted with assistance of one or more workers operation signals / communication must be understood by all involved to avoid injury or death.

During the machine lift procedure, keep people away from the area, especially the area under the machine.

Carry out the lifting work on firm level ground.

1. Position the machine as shown in the figure.

2. Position the boom to the front of the machine.

3. Stop the engine and move the safety lock lever to the “LOCKED” position. Get off the machine. Check the operator’s seat and area for any loose item, tools etc. that could fall or cause a problem or injury during the procedure and remove or secure them.

4. Install lift eyes / shackles at holes provided at both ends of the dozer blade. Connect the lift apparatus (wire rope or chain).

5. Connect the lift apparatus (wire rope or chain) to the boom, see figure.

6. Slowly start to raise the lift apparatus to check for any contact with the machine. If the lift apparatus touches the machine, protect the machine from damage by lowering the apparatus and placing a piece of wood or heavy cloth etc. between the machine and the apparatus.

7. Lift the machine slightly to make sure there is balance and control then with all others clear lift and lower the machine to the desired location.

Cab

Canopy

Rubber crawler

1730 kg (3814 lb)

1620 kg (3572 lb)

Steel crawler

1790 kg (3946 lb)

1680 kg 3704 lb)

A, B. CONNECTION POINTS C. BAR

5-5

5. TRANSPORTATION

5.3

LOAD SPECIFICATIONS

A. BOOM WITH ARM CYLINDER LxHxW Weight

mm (ft·in)

1820 x 650 x 300 (5’11.7” x 2’1.6” x 11.8”)

kg (lbs)

78 (172)

B. ARM AND STANDARD BUCKET Arm lenght

mm (ft·in)

LxHxW

mm (ft·in)

Weight

kg (lbs)

Standard Arm

Long Arm

1750 x 350 x 450

1970 x 360 x 450

(5’8.9” x 1’1.8” x 1’5.7”)

(6’5.6” x 1’2.2” x 1’5.7”)

100 (221)

112 (247)

Standard Arm

Long Arm

C. ARM Arm lenght

mm (ft·in)

LxHxW

mm (ft·in)

Weight

kg (lbs)

1260 x 330 x 250

1470 x 360 x 250

(4’1.6” x 1’1.0” x 9’8”)

(4’9.9” x 1’2.2” x 9.8”)

61 (135)

73 (161)

5-6

5. TRANSPORTATION D. STANDARD BUCKET Capacity

m3 (cu·yd)

LxHxW

mm (ft·in)

Weight

0.44 (0.058) 550 x 440 x 450 (1’9.6” x 1’5.3” x 1’5.7”)

kg (lbs)

35 (77)

E. DOZER LxHxW Weight

mm (ft·in)

910 x 250 x 1320/990 (2’11.8” x 9’8” x 4’4.0”/3’3.0”)

kg (lbs)

74 (163)

5-7

5. TRANSPORTATION

5-8

6. SPECIFICATIONS

6-1

6. SPECIFICATIONS

6-2

6. SPECIFICATIONS

6.1

GENERAL SPECIFICATIONS

6.1.1

MACHINE DIMENSIONS Unit: mm (ft·in)

A. CANOPY

B. CAB

6-3

6. SPECIFICATIONS 6.1.2

GENERAL SPECIFICATIONS

A. SPEED AND GRADEABILITY Item

Rubber crawler

Slew speed

Steel crawler

8.6 min (8.6 rpm) -1

Travel speed

Low (1st)

High (2nd)

Low (1st)

High (2nd)

2.0 km/h

4.0 km/h

2.0 km/h

4.0 km/h

Gradeability

58% (30°)

B. ENGINE Model

MITSUBISHI L3E-W231KBS

Type

Water-cooled, 4-cycle type Swirl chamber type diesel engine

Number of cylinders-Bore x Stroke

3 - 76 mm x 70 mm (3 - 2.99” x 2.76”)

Total displacement

952 ml (58.1 cu•in) 11.3 kW / 2200 min-1 (15.4 PS / 2200 rpm)

Power

53.5 Nm / 1800 min-1 (39.4 lbf•ft / 1800 rpm)

Maximum torque Starting motor

12 V / 1.7 kW

Generator

12 V / 40 A

C. HYDRAULIC COMPONENTS Hydraulic pump

Variable displacement, at axial piston with pilot gear pump

Hydraulic motor

Axial piston

Hydraulic Motor w/Reduction gear (Travel)

Variable displacement axial piston, 2-Speed motor

Control valves

11-spools multiple control valve

Cylinder (Boom, arm, swing, bucket, dozer blade, crawler)

Double action cylinder

Return filter

Filter Type (ß10 >/= 8 P)

D. SIDE DIGGING AND DOZER BLADE Type Boom swing angle Stroke of dozer blade (up/down)

Boom swing by hydraulic cylinder Right

55°

Left

42°

mm (in)

280 / 270 (11.0 / 10.6)

6-4

6. SPECIFICATIONS 6.1.3

CRAWLER TYPE

Type

Length between center of idler and center of travel motor mm (ft•in)

Width mm (in)

Ground Pressure kPa (psi)

Rubber crawler

230 (9.1”)

27 (3.9)

230 (9.1”)

28 (4.1)

Steel crawler (Optional)

6.1.4 Bucket

BUCKET TYPE Heaped capacity

Outer thickness mm (in)

m3 (cu•yd)

with side cutter

without side cutter

0.044

450

420

(0.058)

(1’5.7”)

(1’4.5”)

6-5

Number of teeth

3

Weight kg (lbs)

35 (77)

6. SPECIFICATIONS 6.1.5

ATTACHMENT WORKING RANGES

A. CANOPY

UNIT: mm (ft•in) No.

Attachment

Arm

STD. ARM 0.98 m (3’2.6”)

LONG ARM 1.2 m (3’11.2”)

Bucket

0.044 m (0.058 cu•yd)

0.044 m3 (0.058 cu•yd)

3

A

Maximum digging reach

3890 (12’9.1”)

4120 (13’6.2”)

A'

Maximum digging reach at ground level

3790 (12’5.2”)

4020 (13’2.3”)

B

Maximum digging depth

2150 (7’0.6”)

2370 (7’9.3”)

C

Maximum digging height

3680 (12’0.9”)

3880 (12’8.8”)

D

Maximum dumping clearance

2650 (8’8.3”)

2750 (9’0.3”)

E

Minimum dumping clearance

1000 (3’3.4”)

810 (2’7.9”)

F

Maximum vertical wall digging depth

1660 (5’5.4”)

1920 (6’3.6”)

G

Minimum front slew radius

1560 (5’1.4”)

1680 (5’6.1”)

H

Height at minimum slew radius

2750 (9’0.3”)

2850 (9’4.2”)

J

Digging depth for 8’ flat bottom

1510 (4’11.4”)

1830 (6’0.0”)

K

Horizontal digging stroke Stroke at ground level Minimum

1700 (5’6.9”)

1210 (3’11.6”)

1240 (4’0.8”)

1960 (6’5.2”)

L X Y

Dozer

Above

280 (11.0”)

280 (11.0”)

Below

270 (10.6”)

270 (10.6”)

6-6

6. SPECIFICATIONS B. CAB

UNIT: mm (ft•in) No.

Attachment

Arm

STD. ARM 0.98 m (3’2.6”)

LONG ARM 1.2 m (3’11.2”)

Bucket

0.044 m (0.058 cu•yd)

0.044 m3 (0.058 cu•yd)

3

A

Maximum digging reach

3890 (12’9.1”)

4120 (13’6.2”)

A'

Maximum digging reach at ground level

3790 (12’5.2”)

40270 (13’2.3”)

B

Maximum digging depth

2150 (7’0.6”)

2370 (7’9.3”)

C

Maximum digging height

3240 (10’7.6”)

3410 (11’2.3”)

D

Maximum dumping clearance

2280 (7’5.8”)

2440 (8’0.1”)

E

Minimum dumping clearance

800 (2’7.5”)

590 (1’11.2”)

F

Maximum vertical wall digging depth

1660 (5’5.4”)

1920 (6’3.6”)

G

Minimum front slew radius

1890 (6’2.4”)

1920 (6’3.6”)

H

Height at minimum slew radius

2550 (8’4.4”)

2550 (8’4.4”)

J

Digging depth for 8’ flat bottom

1510 (4’11.4”)

1830 (6’0.0”)

K

Horizontal digging stroke Stroke at ground level Minimum

1700 (5’6.9”)

1210 (3’11.6”)

L X Y

Dozer

1240 (4’0.8”)

1960 (6’5.2”)

Above

280 (11.0”)

280 (11.0”)

Below

270 (10.6”)

270 (10.6”)

6-7

6. SPECIFICATIONS 6.1.6

MACHINE AND COMPONENTS WEIGHT UNIT: kg (lbs) ITEM

RUBBER CRAWLER

STEEL CRAWLER

ENTIRE MACHINE

1620 (3570)

1730 (3810)

1680 (3700)

1790 (3950)

1.

UPPER FRAME ASSEMBLY

796 (1760)

906 (2000)

796 (1760)

906 (2000)

1.1

UPPER FRAME

150 (331)

m

m

m

1.2

CANOPY

77 (170)

187 (412)

77 (170)

187 (412)

1.3

ENGINE

* 71 (157)

m

m

m

1.4

HYDRAULIC PUMP

* 14 (31)

m

m

m

1.5

RADIATOR

1.6

HYDRAULIC TANK

1.7

2 (4)

m

m

m

* 18 (40)

m

m

m

FUEL TANK

* 3 (7)

m

m

m

1.8

SWING BRACKET

33 (73)

m

m

m

1.9

SWING CYLINDER

* 16 (35)

m

m

m

1.10 SWING MOTOR

* 23 (51)

m

m

m

1.11 CONTROL VALVE

* 23 (51)

m

m

m

1.12 COUNTERWEIGHT

120 (265)

m

m

m

1.13 ENGINE HOOD 1.14 BOOM CYLINDER

22 (49)

m

m

m

* 17 (37)

m

m

m

2.

LOWER FRAME ASSEMBLY

595 (1310)

m

655 (1440)

m

2.1

LOWER FRAME

213 (470)

m

m

m

2.2

SLEWING BEARING

17 (37)

m

m

m

2.3

TRAVEL MOTOR

* 17 (37) x 2

m

m

m

2.4

LOWER ROLLER

4 (9) x 6

m

m

m

2.5

FRONT IDLER

14 (31) x 2

m

m

m

2.6

IDLER ADJUSTER

8 (18) x 2

m

m

m

2.7

SPROCKET

5 (11) x 2

m

m

m

2.8

RUBBER CRAWLER

58 (128) x 2

m

—

—

2.9

STEEL CRAWLER

—

—

88 (194) x 2

m

2.10 SWIVEL JOINT

* 12 (26)

m

m

m

2.11 DOZER BLADE

74 (163)

m

m

m

2.12 DOZER BLADE CYLINDER

* 10 (22)

m

m

m

3.

ATTACHMENT ASSEMBLY

190 (419)

m

m

m

3.1

BOOM ASSEMBLY

81 (179)

m

m

m

3.1.1 BOOM

60 (132)

m

m

m

3.1.2 ARM CYLINDER

* 18 (40)

m

m

m

3.2

60 (132)

m

m

m

ARM ASSEMBLY

38 (84)

m

m

m

* 12 (26)

m

m

m

5 (11)

m

m

m

3.2.4 IDLER LINK

2 (4) x 2

m

m

m

3.3

BUCKET ASSEMBLY (STANDARD)

35 (77)

m

m

m

4.

FLUIDS ASSEMBLY

38 (84)

m

m

m

4.1

HYDRAULIC OIL

13 (29)

m

m

m

4.2

ENGINE OIL

3 (7)

m

m

m

18 (40)

m

m

m

4 (9)

m

m

m

3.2.1 ARM (STANDARD) 3.2.2 BUCKET CYLINDER 3.2.3 BUCKET LINK

4.3

FUEL

4.4

COOLING WATER

* MARKS SHOW DRY WEIGHT

6-8

7. OPTIONAL EQUIPMENT

7-1

7. OPTIONAL EQUIPMENT

7-2

7. OPTIONAL EQUIPMENT

7.1

OPERATION OF HYDRAULIC BREAKER AND NIBBLER

7.1.1

SELECTION OF HYDRAULIC BREAKER AND NIBBLER

During the fitting of the hydraulic breaker on the excavator, it is necessary to choose a model satisfying the required features as to stability, hydraulic pressure, and oil quantity of the hydraulic system. In order to choose the most suitable hydraulic breaker for the machine requirements, address to an authorized Dealer.

7.1.2

BEFORE OPERATING HYDRAULIC BREAKER AND NIBBLER

Address to an authorized Dealer for piping and for the installation of the hydraulic breaker and nibbler, REPLACE THE HYDRAULIC RETURN FILTER, ACCORDING TO THE MAINTENANCE SCHEDULE ENCLOSED. Thoroughly read the hydraulic breaker operation manual and SAFETY PRECAUTIONS, described in this manual, to avoid damaging the machine or the hydraulic breaker during operation.

7.1.3

PREVENTION OF HYDRAULIC OIL CONTAMINATION

When the hydraulic breaker is not installed on the machine, apply blanking plugs on the tube ends of arm and hydraulic breaker, to prevent the penetration of foreign bodies.

Before starting operation, check the fixing clamps for looseness, and the tubes and hoses fittings for leakage.

7.1.4

ATTACHMENT OPERATION

CAUTION •

•

Read, understand and follow all safety precautions and operation procedures found in this manual before operating the machine or any attachment.

Do not leave the operator cab with engine running.

1. Pull the safety lock lever downward “B” in “UNLOCKED” position.

2. Move the throttle lever to the “HIGH IDLE” position.

3. Using boom, arm and bucket controls set the breaker or nibbler to desired position.

4. Release control pedal lock (1).

5. Make certain breaker or nibbler is in desired position and against material to be broken.

6. Place left foot on pedal and depress with heel to activate breaker.

7. Operate breaker for 30 sec. than release pedal.

WARNING •

•

TO OPERATE BREAKER OR NIBBLER LONGER THAN 30 SECONDS, COULD CAUSE PREMATURE WEAR OR DAMAGE TO THE MACHINE ATTACHMENT. IF MATERIAL IS NOT BREAKING, REPOSITION BREAKER OR NIBBLER AND REPEAT OPERATION AT 30 SECONDS INTERVALS. NEVER LEAVE THE OPERATOR CAB WITH ENGINE RUNNING.

7-3

7. OPTIONAL EQUIPMENT A. ATTACHMENT PEDAL CONTROL The installed attachments are controlled by pedal (1) located left of the operator’s seat.

CAUTION •

•

Precaution during pedal operation.

The operation varies in the specifications, so before operating, read the operator’s manual carefully.

Never place your foot on the pedal. If you place your foot on the pedal and press it by error, the machine can suddenly move. This can cause serious accidents.

Hydraulic breaker Foot pedal depressing section

Operating condition

Left side (A)

Breaker stops operating

Right side (B)

Breaker starts operating

Foot pedal depressing section

Operating condition

Left side (A)

Nibbler closes

Right side (B)

Nibbler opens

Nibbler

WARNING NEVER LEAVE THE OPERATOR CAB WITH ENGINE RUNNING.

B. PEDAL LOCK DEVICE By means of lock device (1) you are able to lock the pedal.

CAUTION Make sure to set the pedal lock in locked position while the breaker or nibbler are not used. Careless contact with unlocked pedal may cause severe accident and injury.

1. PEDAL A. LOCKED

7-4

7. OPTIONAL EQUIPMENT SETTING SELECTOR VALVE Machines equipped with a nibbler breaker attachment the hydraulic system must have the selector valve (1) set to the correct position for breaker or nibbler operation.

NOTE: •

Wrong switching of the selector valve, may decrease the work efficiency and operating speed of the machine and also damage it.

•

Be sure to switch selector valve one or twice a month.

Switch selector valve anyway.

A. SETTING PROCEDURE NOTE: before switching selector valve, be sure to stop the engine and lower the attachment to the ground, so as not to impair the machine stability.

Selector valve markings are shown in figure.

B. BREAKER N. NIBBLER 1. Use wrench (19MM) to turn the selector valve (1) to desired position.

2. Selector valve marking is shown in the figure.

C. To control valve D. To tank

7-5

7. OPTIONAL EQUIPMENT 7.1.5

SETTING THE STOP VALVE

The attachment hydraulic oil shut off valve is located on top of excavator arm. It is used to stop the flow of hydraulic oil when removing or changing attachment.

1. EXCAVATOR ARM 2. PLUG Attachment hydraulic oil valve positions A. CLOSED B. OPEN C. WRENCH SIZE 19 MM HEX

7-6

7. OPTIONAL EQUIPMENT

7.2

SAFETY PRECAUTIONS

The following safety precautions should be used in conjunction with all other safety precautions found in this MANUAL.

WARNING READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS AND OPERATING PROCEDURES FOUND IN THIS MANUAL BEFORE OPERATING THE MACHINE OR ANY ATTACHMENT. PASSENGERS This equipment is not intended or designed for the transportation of persons. Never allow persons to ride on the machine. Serious injury or death can result from allowing passengers on or in the machine.

NO PASSENGERS PROTECTIVE EQUIPMENT When operating attachments that produce flying debris, it is highly recommended to procure and install protective guards on the machine and close all windows to protect the operator from flying debris. Also the operator and all personnel in the vicinity of the machine should wear protective clothing such as safety shoes, hard hat, gloves and face shield or goggles.

USE FOR INTENDED PURPOSE Use the attachment only for its intended purpose. If not used in accordance with the Manufacturer’s instructions, the excessive pressure exerted on the boom, arm and frame structure of the machine will cause premature failure of the components.

7-7

7. OPTIONAL EQUIPMENT CYLINDERS Do not operate the breaker with the excavator cylinders fully extended or retracted, to avoid attachment and/or cylinder damage.

AVOID CONTINUOUS OPERATION Operate the breaker with intervals of 30 seconds.

A prolonged attachment use can cause a temperature increase and the risk of serious damages to the pressure accumulators, to the cylinder seals and to the pump.

HOSE SWELLING Should the hydraulic hoses begin to swell or vibrate abnormally, during breaker or nibbler operation, immediately stop working and contact an authorized Dealer for assistance. This inconvenient is often due to pressure accumulators being damaged.

DO NOT USE DROPPING FORCE Do not use the dropping force of the attachment to let it fall on the material. This will cause extensive damage to the attachment and machine structure.

7-8

7. OPTIONAL EQUIPMENT DO NOT USE SLEW / SWING FORCE Never use the slew/swing force of the machine for pushing or sliding objects. This will cause premature failure of the attachment and other machine components.

DO NOT PRY WITH HYDRAULIC BREAKER Do not use the breaker to pry open and break rocks or concrete. This may damage the hydraulic breaker, and also boom, arm and cylinder.

ARM IN VERTICAL POSITION Do not operate with arm set perpendicular to soil. The piston rod joint and the same piston can get damaged.

DO NOT LIFT LOADS Never use an optional attachment to lift or transport objects or material. The failure to observe this instruction can cause extensive damage to the attachment and to the machine structures and cause injury or death.

7-9

7. OPTIONAL EQUIPMENT WORKING RANGE

WARNING NEVER OPERATE AN OPTIONAL ATTACHMENT OVER THE SIDES OF THE MACHINE. OPERATE THE ATTACHMENT ONLY OVER THE FRONT OR REAR OF THE MACHINE. Do not operate the breaker to the side of the machine.

The machine may become unstable and undercarriage components wear off more rapidly.

NOTE: •

Refer to this SECTION also for other attachments fitted on the machine, rather than the hydraulic breaker.

•

In order to work with the hydraulic breaker, etc. use reinforced arm. If you use the standard arm, you can damage it.

7-10

7. OPTIONAL EQUIPMENT

7.3

REGULAR INSPECTION AND MAINTENANCE

A. REPLACEMENT INTERVALS Contamination and deterioration of hydraulic oil may develop malfunctioning of control valves, early wear and seizure of hydraulic pump. Operation of the breaker hastens deterioration of hydraulic oil, if compared with normal operation with bucket. Replace filters and hydraulic oil, referring to the following table: INSPECTION AND MAINTENANCE TABLE

LOCATION

HYDRAULIC OIL REPAIR KIT

REPLACEMENT INTERVAL FIRST

2nd REPLACEMENT

REGULAR

Hydraulic oil system tank

—

—

Every 600 hours

Hydraulic oil system tank

50 hours

250 hours

Every 250 hours

B. MAINTENANCE RECORD SHEET (EXAMPLE) DATE

HOURS

FILTER REPLACEMENT

7-11

HYDRAULIC OIL CHANGE

7. OPTIONAL EQUIPMENT

7-12

8. TROUBLESHOOTING

8-1

8. TROUBLESHOOTING

8-2

8. TROUBLESHOOTING

8.1

GENERAL TROUBLESHOOTING

This troubleshooting information covers the components and systems as described in this MANUAL. Should in depth troubleshooting, repair or replacement of components or adjustment of valves be required, contact Dealer for assistance.

SYS

TROUBLES

PROBABLE CAUSE

1. All operating speeds a. Low hydraulic oil level are slow or power is lost b. Air in the suction pipe

POSSIBLE REMEDY Fill oil to specified level Tighten suction pipe hose clamp or replace hose

c. Hydraulic pump is damaged

Repair or replace

d. Pilot gear pump is damaged

Repair or replace

e. Main relief valve not adjusted correctly

Adjust or replace

f. Relief valve of pilot circuit not adjusted correctly

Adjust or replace

Repair or replace 2. A specific cylinder func- a. Cylinder seal is damaged tions improperly or los- b. Control valve or overload valve faulty or signs of air Repair or replace/bleed es power in the cylinder air from cylinder

OPERATION

c. Pilot valve is damaged 3. The cylinder will not hold with operating lever in neutral position

d. Pilot valve piping is loose

Retighten

a. Cylinder seal is damaged

Repair or replace

b. Control valve or overload valve is damaged

Repair or replace

c. Overload valve is not operating

Repair or replace

d. Pilot valve is damaged

Repair or replace

4. Machine does not slew a. Hydraulic motor (slew mechanism) does not work Repair or replace or slew reduction unit is damaged

5. Slewing speed is slow

b. Slewing bearing is damaged

Repair or replace

c. Pilot valve is not working

Repair or replace

d. Slewing reduction unit is damaged

Repair or replace

e. Solenoid valve is not working

Repair or replace

f. Control valve is not working

Repair or replace

g. Lock solenoid valve is not working

Repair or replace

a. Control valve is not working

Repair or replace

b. Hydraulic motor (slewing) is not working

Repair or replace

c. Hydraulic pump is not working

Repair or replace

d. Pilot valve is not working

Repair or replace

6. Abnormal sound occurs a. Insufficient lubrication of superstructure slewing when slewing ring and bearings

Grease

b. Pilot valve is not working

Repair or replace

c. Control valve is not working

Repair or replace

1. Machine does not travel a. Too much crawler tension smoothly b. Dirty or clogged crawlers TRAVEL

Repair or replace

Adjust crawler tension Clean crawlers

c. Brake valve is not working

Repair or replace

d. Travel reduction unit is damaged

Repair or replace

e. Control valve is not working

Repair or replace

f. Travel motor damaged

Repair or replace

g. Main relief valve pressure is set incorrectly

Adjust or replace

h. Swivel joint is damaged

Repair or replace

8-3

8. TROUBLESHOOTING SYS

TROUBLES

PROBABLE CAUSE

TRAVEL

2. Travel power is insuffi- a. Hydraulic pump is damaged cient b. Poor engine performance

POSSIBLE REMEDY Repair or replace Repair or replace

c. Main relief valve pressure is set incorrectly

Adjust or replace

d. Low hydraulic oil level

Fill to proper level

e. Hydraulic motor (travel) is not working

Repair or replace

f. Brake valve is not working

Repair or replace

g. Seal in swivel joint is scored or oil is leaking

Repair or replace

3. Machine does not travel a. Unequal tensions on crawlers straight b. Set pressures of main relief valves unbalanced

Adjust tension Adjust

HYDRAULIC SYSTEM

c. Performance of an hydraulic travel motor has dete- Repair or replace riorated Repair or replace

e. Unbalanced discharge from hydraulic pump

Repair or replace

f. Unbalanced flow from brake valve

Repair or replace

g. Unbalanced flow between right swivel joints

Repair or replace

1. Temperature rise of the a. Oil cooler core clogged hydraulic oil b. Engine fan belt slipping

1. Engine oil pressure is too low

GAUGE CLUSTER DISPLAY

d. Unbalanced flow from control valve

2. Abnormal rise of coolant temperature

3. Battery charge

Cleaning Adjust or replace

c. Low hydraulic oil level

Fill oil to specified level

d. Wrong type hydraulic oil used

Replace with correct oil

e. Hydraulic pump is not working

Repair or replace

a. Engine oil level low

Fill oil to specified level

b. Oil leaking

Repair and fill to proper level

c. Wrong oil viscosity

Replace with proper oil

a. Coolant too low

Fill to proper level

b. Coolant leaking

Repair and fill to proper level

c. Loose radiator cap

Tighten

d. Clogged radiator

Clean cooling system

e. V-belt loose or damaged

Tighten to proper tension

f. Rust or scale in coolant

Flush system/fill to level

g. Faulty thermostat

Replacement

a. Battery terminals disconnected, loose, or corroded Clean and connect b. Low battery electrolyte

Refill

c. V-belt loose or damaged

Adjust or replace

d. Battery service life has run down

Replacement

8-4

8. TROUBLESHOOTING SYS

TROUBLES

PROBABLE CAUSE

POSSIBLE REMEDY

1. Starter does not turn or a. Battery disconnected Connect turns too slowly for en- b. Battery discharged Charge gine start-up c. Battery terminals disconnected, loose, or corroded Clean and connect d. Ground cable disconnected

Connect

e. Engine oil viscosity too thick (cold weather)

Replace with correct oil

2. Starter turns but engine a. Low fuel does not start b. Improper starting procedure c. Air in fuel line

Bleed (See 4-19)

d. Clogged fuel filter

Replace element

e. Clogged air cleaner

Replace elements

f. Air heater circuit malfunctioning

Check circuit

3. Engine tends to stop at a. Low idle speed low speed b. Clogged fuel filter

ENGINE

4. No power

5. Engine overheats

Serviceman Replace element

c. Clogged air cleaner

Replace elements

d. Improper valve clearance

Serviceman

a. Clogged fuel filter

Replace element

b. Clogged air cleaner

Replace element

c. Improper valve clearance

Serviceman

d. Loose clamps on suction hose

Tighten clamps

e. Cracked air inlet hose

Replace

a. Coolant too low

Top up coolant

b. Clogged radiator

Clean cooling system

c. V-belt loose or damaged

Adjust or replace belt

d. Faulty thermostat

Replacement

6. Engine exhaust is black a. Clogged air cleaner b. Improper valve clearance 7. Poor fuel consumption a. Fuel leak

Replace elements Serviceman Serviceman

b. Clogged air cleaner

Replace elements

c. Loose clamps on suction hose

Tighten clamps

d. Cracked air inlet hose

Replace with new hose

e. Engine oil level is too high

Reduce to specified level

8. Excessive oil consump- a. Improper oil tion b. Oil leaking

9. Engine oil pressure does not rise

Refill Refer to chapter “3. MACHINE OPERATION”

Replace with correct oil Serviceman

c. Improper oil replacement intervals

Change at correct interval

d. Improper warming-up operation

Refer to 3-11

a. Oil too low

Fill oil to specified level

b. Oil leaking

Serviceman

c. Improper oil viscosity

Replace with proper oil

8-5

8. TROUBLESHOOTING SYS

TROUBLES

ENGINE

10. Battery dies often

PROBABLE CAUSE

POSSIBLE REMEDY

a. Battery terminals disconnected, loose, or corroded Clean and tighten terminals b. Low battery electrolyte

Fill cells with distilled water

c. V-belt loose or damaged

Adjust or replace belt

d. Defective battery

Replace batteries

8-6

9. SPECIAL PROCEDURE

9-1

9. SPECIAL PROCEDURE

9-2

9. SPECIAL PROCEDURE

9.1

MOVING A MACHINE STOPPED BECAUSE OF SUDDEN FAILURE

WARNING READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS AND PROCEDURES FOUND IN THIS MANUAL BEFORE ATTEMPTING ANY OPERATION, INSPECTION, MAINTENANCE OR REPAIR OF THIS MACHINE, ATTACHMENT OR ANY OF ITS SYSTEMS.

WARNING THE PROCEDURES FOUND IN THIS SECTION SHOULD BE PERFORMED BY A WELL TRAINED EXPERIENCED SERVICE TECHNICIAN WHO IS FAMILIAR WITH THE MACHINES. A. RELEASING LOCK ON TRAVEL MOTOR The travel motors of a disabled machine are locked by the hydraulic control valve and by the mechanical brake system. If the machine is not able to run, it can be moved by releasing the travel motor lock by following one of the following methods.

1. Support 2. Block NOTE: avoid contamination of reduction units while the covers are removed.

A. 1 REMOVING REDUCTION UNIT

GEARS

FROM

TRAVEL

This is the preferred method.

WARNING MAKE SURE BLOCKS ARE SECURE AT FRONT AND REAR OF EACH CRAWLER BEFORE ATTEMPTING TO RELEASE BRAKES. DO NOT STAND IN THE PATH OF THE CRAWLERS WHEN RELEASING BRAKES. AND PROVIDE A SUPPORT FOR THE ATTACHMENT IF NECESSARY. 1. Place blocks at front and rear of each crawler to prevent machine from moving when brakes are released.

2. Lower attachment to ground.

9-3

9. SPECIAL PROCEDURE 3. Place a pan under the travel motor to drain oil in, see figure.

Slowly remove upper plug, then remove drain plug (1) to drain reduction unit oil.

Plug (1): Opposing flat 6 mm (0.24 in) Avoid oil spills, use pans, rags, and/or paper towels to clean any oil leakage.

Dispose of all hazardous waste in accordance with government laws and regulations.

4. Insert a (flat) screwdriver into gap between the body (1) and O-snap ring (3), to remove the O-snap ring (3).

5. Remove the cover (2) together with the side ring (5).

6. Remove the carrier assembly (6) from the reduction unit and protect it from contamination and/or damage.

NOTE: the crawler belt / crawler is now free to rotate.

7. Temporarily install the cover (2).

8. Repeat steps 1 through 7 on the opposite travel reduction unit to remove the carrier assembly (6).

9. Tow the machine to a safe place to proceed with the appropriate repairs.

9-4

9. SPECIAL PROCEDURE B. ASSEMBLING TRAVEL MOTOR 1. After all repairs are made, reinstall the carrier assembly (6) on both travel reduction units in reverse order and make sure to use fresh gear oil.

NOTE: be careful when installing the cover. Do not damage the O-ring.

2. Replace the O-ring with new parts, and install the drain plug (4).

Tightening torque: 58.8 ± 9.8 Nm (43.4 ± 7.2 lbf•ft) NOTE: be careful not to damage the O-ring in this case.

3. Add the specified gear oil through the OIL FILL plug until oil starts flowing out of the OIL LEVEL plug.

NOTE: refer to “MAINTENANCE”, 4-10 for proper oil and capacities.

Clean up all spilled oil.

9-5

9. SPECIAL PROCEDURE C. LOWERING BUCKET / ATTACHMENT ON A DISABLED MACHINE

WARNING •

•

• •

The following procedure is to be used only in an emergency if the machine is disabled. Proceed with extreme caution. Keep people away from the bucket/attachment and excavator boom.

The weight of the bucket or attachment may cause unexpected movement of bucket/attachment, arm and boom during the procedure.

Block the bucket/attachment to avoid unexpected movement. Release the pressure in the hydraulic lines slowly until pressure is completely released.

Control the bucket/attachment movement by slowly removing the lock.

Do not enter the area under bucket/attachment while lowering.

To lower the bucket position, proceed as follows: When the bucket is in digging position (A) (bucket cylinder completely extended, see figure right), disconnect hose head (H) side. Conversely, when the bucket is in dump position (B) (bucket cylinder completely retracted, see the right figure), disconnect the hose rod (R) side.

NOTE: do not allow a hydraulic line or component to become contaminated. This could cause severe system damage. To the hydraulic system, contact the dealer/distributor to obtain the proper caps and plugs to be used on this machine.

NOTE: clean up all spilled oil. Dispose of all hazardous waste in accordance with government environmental laws and regulations.

9-6

9. SPECIAL PROCEDURE D. LOWERING ARM AND BOOM

WARNING •

•

• •

The following procedure is to be used only in an emergency if the machine is disabled. Proceed with extreme caution. Keep people away from the bucket/attachment and excavator boom.

The weight of the bucket or attachment may cause unexpected movement of bucket/attachment, arm and boom during the procedure.

Block the bucket/attachment to avoid unexpected movement. Release the pressure in the hydraulic lines slowly until pressure is completely released.

Control the bucket/attachment movement by slowly removing the lock.

Do not enter the area under bucket/attachment while lowering.

1. Lowering Arm (Step 1) (A) Gradually loosen the hose of rod side connected to the arm (R).

2. Lowering Boom (Step 2) (B) Gradually loosen the hose of head (H) side connected to the boom cylinder.

NOTE: clean up all spilled oil. Dispose of all hazardous waste in accordance with government environmental laws and regulations.

3. Stop lowering the attachment at 30 ~ 40 cm (12 ~ 16 in) above ground level to allow for moving the machine if necessary.

4. Tighten the hose fitting.

5. After moving the machine to a safe place, slowly loosen the hose fitting to lower the attachment to ground.

6. Contact the dealer/distributor for machine repairs.

9-7

9. SPECIAL PROCEDURE

9-8