New Holland E26B SR / E29B SR Mini Excavator Service Repair Manual

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SER

SR

SR

Engine

INTRODUCTION

[10.001] Engine and crankcase

[10.102] Pan and covers

[10.106] V alve drive and gears

[10.101] Cylinder heads

[10.105] Connecting rods and pistons

Crankshaft and flywheel

[10.218] Fuel injection system

[10.202] Air cleaners and lines

[10.250] T urbocharger and lines

[10.254] Intake and exhaust manifolds and muf fler

[10.400] Engine cooling system

[10.304] Engine lubrication system .

Hydraulic systems

Hydraulic systems

Reservoir , cooler , and filters

V ariable displacement pump

Main control valve

Hydraulic hand control

Hydraulic foot control

Hydraulic swing system

Hydraulic travel system

Hydraulic central joint

Boom hydraulic system

Excavator and backhoe bucket hydraulic system

Swing arm hydraulic system

Dozer blade cylinders

Frames and ballasting

Upper frame

Swing ring assembly

Ballasts and supports

Tracks and track suspension

T rack frame and driving wheels

T racks

T rack tension units

T rack rollers

Electrical systems

Electrical system

Harnesses and connectors

Engine control system

Engine starting system

Alternator

Battery

Fuel tank system

Engine oil system

External lighting

Cab platform harnesses and connectors

dippers, and buckets

14] Boom pivoting support

Boom

Dipper arm

Bucket

Dozer blade and arm

10] Dozer blade

Cab

10] Operator platform less cab

14] Operator protections Machine shields and guards

16] Fenders and guards

Foreword - Important notice regarding equipment servicing

Safety rules

Personal safety

Basic instructions - How use maintenance standards and precautions

General specification W eight

Capacities

Product identification

Product identification - Machine orientation

Part identification

Foreword - Important notice regarding equipment servicing

All repair and maintenance work listed this manual must carried out only qualified dealership strictly complying with the instructions and whenever the special

Anyone who performs repair and maintenance operations without complying with the procedures provided herein shall responsible for any subsequent

The manufacturer and all the organizations its distribution chain, including - without limitationnational, regional, local reject any responsibility for damages caused parts and / components not approved the facturer , including those used for the servicing repair the product manufactured marketed the manufacturer any case, warranty given attributed the product manufactured marketed the manufacturer case damages caused parts and / components not approved the manufacturer

The information this manual - - date the date the the policy the manufacturer for continuous Some information could not updated due modifications a technical commercial type, changes the laws and regulations dif ferent countries.

case refer your NEW HOLLAND CONSTRUCTION Sales and Service

Safety rules

Personal safety

This the safety alert used alert you potential personal injury Obey all safety messages that follow this symbol avoid possible death injury

Throughout this manual you will find the signal words W and CAUTION followed special These precautions are intended for the personal safety you and those working with

Read and understand all the safety messages this manual before you operate service the

DANGER indicates a hazardous situation not will result death serious injury

W ARNING indicates a hazardous situation not could result death serious injury

CAUTION indicates a hazardous situation not could result minor moderate injury

F AILURE T O FOLLOW

Machine safety

NOTICE: Notice indicates a situation that, not avoided, could result machine property damage.

Throughout this manual you will find the signal word Notice followed special instructions prevent machine property damage. The word Notice used address practices not related personal safety .

Information

NOTE: Note indicates additional information that clarifies other information this

Throughout this manual you will find the word Note followed additional information about a step, other information the The word Note not intended address personal safety property

Personal safety

NOTICE: The proper and safe lubrication and maintenance for this recommended Manufacturer , are outlined the OPERA T OR’S MANUAL for the Improper performance lubrication maintenance procedures are dangerous and could result injury Read and understand the MANUAL before performing any lubrication

The serviceman mechanic may unfamiliar with many the systems this machine. This makes a careful use the systems very important when performing maintenance Sound knowledge the system and components important before the removal disassembly any

Because the size some the machine the serviceman mechanic should check the weights noted this Use proper lifting procedures when removing any W eight components table shown this

The following a list basic precautions that must always

Read and understand all W arning plates and decals the machine before Maintaining Repairing this

Always wear protective glasses and protective shoes when working around particular , wear tive glasses when using punches drifts any part the machine Use welders gloves, hood / goggles, apron and the protective clothing appropriate the welding job being performed. not wear loose fitting torn Remove all rings from loose jewellery , confine long hair and loose ing before working this machinery

Disconnect the battery and hang a tag the operator ’ s Remove starter key make all repairs with the machine parked a level and firm Block the machine does not roll while working under the machine. Hang a tag the operator ’ s seat. not work any machine that supported only jacks a Always use blocks stops for the jack before carrying out any disassembly operation.

NOTICE: not operate this machine unless you have read and understood all instructions contained this manual. Improper machine operation dangerous and could result injury

Relieve all pressure air , oil water systems before any lines, fittings related items are disconnected Always make sure all raised components are blocked correctly and alert for possible pressure when disconnecting any device from a system under

Lower the dozer other attachments the ground before performing any work the this cannot make sure the blade other attachment blocked correctly prevent from dropping unexpectedly .

Use steps and grab handles when mounting dismounting a Remove any debris mud from walkways work platforms before using Always face the machine when using ladders and When not possible use the designed access provide scaf platforms perform safe repair

T o avoid back injury , use a hoist when lifting components which weigh lb) Make sure all are good condition and are the correct capacity sure hooks are positioned correctly Lifting eyes are not side loaded during a lifting

T o avoid alert for hot parts and surfaces immediately after stopping the machine such hot fluids tubes and compartment

1 careful when removing cover Gradually back f the last two capscrews nuts located opposite ends the cover device and carefully pry the cover loose relieve any spring other before removing the last two capscrews nuts completely .

Be careful when removing filler breathers and plugs the Hold a rag over the cap plug prevent being sprayed splashed liquids under Danger even greater the machine has just been liquids might boiling

Always use the proper tools that are good condition and that are suited for the job sure you understand how use them before performing any service

Reinstall all clamps with the same spare part number not use clamps inferior quality replacement necessary .

Repairs which require welding should performed only with the benefit the appropriate reference tion and personnel adequately trained and skilled welding Determine the type metal being welded and select the correct welding procedure and rods wires provide a metal weld strength least equivalent that the parent Make sure disconnect the battery before any welding operation performed.

not damage wiring during removal

Reinstall the wiring not damaged nor will damaged operation the machine contacting sharp rubbing against some object hot not connect wiring a line containing sure all protective including guards and are properly installed and functioning correctly before starting a repair . a guard shield must removed perform the repair work, use extra caution and replace the guard shield after repair

18. Performing maintenance and repair operations while the bucket lifted dangerous, because there the sibility a device not fail lower such device and place the bucket the ground before starting the

Loose dirty lubrication and hydraulic pipes and hoses may cause not bend strike high - pressure not install bent damaged Inspect tubes and hoses carefully not check for leaks with your hands. V ery small (pinhole) leaks can result a high velocity oil jet that will invisible close the

This oil can penetrate the skin and cause personal injury Use card - board paper locate pinhole T ighten connections the correct Make sure that all protections against the clamps and the ator ’ s protective devices are correctly installed order prevent excessive vibrations rubbing against other parts during operation. Shields that protect against oil spray onto hot exhaust components event a tube seal failure must installed correctly

not operate a machine any rotating part damaged contacts any other part during Any high speed rotating component that has been damaged altered should checked for balance before careful when servicing separating the Chips can fly when removing installing a track W ear safety glasses and long sleeve protective T racks can unroll very quickly when Keep away from front and rear The machine can move unexpectedly when both tracks (crawlers) are disengaged from the Block the machine prevent from

General precautions for repairs

Preparation before disassembling

Understanding operating procedure

Read OPERA TION AND MAINTENANCE MANUAL carefully understand the operating procedure.

Cleaning machines

Remove and dust from the machine before carrying into the service shop prevent loss work ficiency , damage and dif ficulty rust prevention and dust protection while

Inspecting machines

Identify the parts disassembled before starting work, determine the disassembling procedure yourself considering the workshop situations and request procurement necessary parts

Recording

Record the following items for communication and prevention recurring

Inspection date and place

Model applicable machine number , and hour meter read

T rouble place and

V isible oil water leakage and damage

Clogging oil oil quality , oil contamination and loosening connections

Result consideration any problem exists based the operation rate per month calculated from hourmeter indication after the last inspection

Arrangement and cleaning service shop

T ools required for repair

Prepare space place the disassembled parts.

Prepare oil containers for draining oil

Safety disassembling and assembling

W ear appropriate clothes with long safety safety helmet and protective

Suspend warning tag “DO NOT OPERA TE” from the doorknob the operating lever , and have a preliminary meeting before starting

Stop the engine before starting inspection and maintenance prevent the operator being caught machine.

Identify the location a first - aid kit and a fire extinguisher , and also where make contact a state emergency

Choose a hard, level and safe place, and place the attachment the ground securely .

Use a lifter such a crane remove heavy parts ( ( ) more) from the

Use proper and replace repair defective

Support the machine and attachment with supports blocks the work performed the lifted

Disassembling and assembling hydraulic equipment

Removing hydraulic equipment

Before disconnecting release the hydraulic pressure the open the return side cover and take out the filter

Carefully drain oil the removed pipes into a containers without spilling the floor

Apply plugs caps the pipe ends avoid oil spillage and dust

Clean f the external surface the equipment before and drain hydraulic and gear oil before placing the workbench.

Disassembling hydraulic equipment

not disassemble, reassemble modify the hydraulic equipment without the permission the manufacturer , who not responsible for the performance and function the product after

When disassembling and reassembling for unavoidable refer the work qualified personnel who have the specific knowledge completed the parts service

Provide matching marks facilitate reassembling

Before starting the read the manual disassembling and decide whether the work can performed

Use the special jig and tools without fail they are specified.

hard remove a part according the not try force but investigate the

Place the removed parts order and attach tags facilitate the reassembling.

Note the location and quantity parts commonly applied multiple

Inspecting parts

Ensure that the disassembled parts are free from interference and uneven

Measure and record wear condition parts and the problem found a repair replace with a new

Reassembling hydraulic equipment

T

urn the ventilation fan open windows maintain good ventilation prior starting the cleaning

Perform rough and finish cleaning before

Remove washing oil air and apply clean hydraulic gear oil for

Always replace the removed O - backup rings and oil seals with new ones applying grease

Remove dirt and moisture from and perform degreasing the surface where liquid gasket

Remove rust preventive agent from the new parts before Fit bushings and oil seals using special

Assemble the parts utilizing matching

Ensure all the parts are completely assembled after the work.

Installing hydraulic equipment

Ensure hydraulic oil and lubricant are properly supplied.

Perform air bleeding when:

Hydraulic oil changed

Parts suction side piping replaced

Hydraulic pump installed

Slewing motor installed

T ravel motor installed

Hydraulic cylinder installed

NOTICE: Operation the hydraulic equipment without filling hydraulic oil lubricant without performing air bleeding will result damage the

Perform air bleeding the hydraulic pump and slewing motor after loosening the upper drain starting the engine and keep low idle

Complete the air bleeding when seeping hydraulic oil recognized, and tightly plug.

Perform air bleeding the travel motor and the hydraulic cylinders running the engine for more than 5 min low speed without load.

NOTICE: not allow the hydraulic cylinder bottom the stroke end just after the maintenance.

Perform air bleeding pilot line performing a series slewing and

Check hydraulic oil level after placing the attachment the oil check position, and replenish oil necessary .

Electrical equipment

not disassemble electrical

Handle carefully not drop and give a

T urn the key f prior connecting and disconnecting

Disconnect the connector holding and pressing the not pull the wire apply force the caulking

Connect the connector and ensure completely locked.

T urn the key f prior touching the terminal starter generator

Remove the ground (earth) terminal battery when handling tools around the battery its relay . not splash water the electrical equipment and connectors during machine

Check for moisture adhesion inside the waterproof connector after pulling out, since hard remove ture from the connector

moisture adhesion dry completely before the

Battery electrolyte

Battery electrolyte dilute sulfuric acid. Exposure skin eyes this liquid will cause burning loss eyesight. the exposure take the following emergency measures and seek the advice a medical

• When skin exposed: W ash with water and soap suf ficiently

• When eyes exposed: Immediately wash away with city water continuously for more than min

• When a large amount the liquid flows out: Neutralize with sodium bicarbonate wash away with city water

• When swallowed: Drink a large amount milk water .

• When clothes exposed: Immediately undress and wash.

Hydraulic parts

O - ring

• Ensure O - rings have elasticity and are not damaged before use.

• Use the appropriate O - O - rings are dif ferent kinds and made dif ferent and they have a dif ferent hardness applied a variety such moving fixed subject high pressure and exposed corrosive even their size

• Fit the O - rings without distortion and

• Always handle floating seals a pair

Flexible hose hose)

• Use the appropriate Dif ferent parts are used depending the working pressure even the size fitting and the total length the hose

• T ighten the fitting the specified torque.

Ensure interference nor oil leakage

W elding repair

Refer repair welding qualified personnel according the appropriate

Disconnect the ground (earth) cable the battery before starting the repair Failure will cause damage the electrical

Move away the articles advance that may cause fire exposed

Before starting the repair the not fail cover the plated surface the piston rod with flameproof sheet prevent from being exposed

Environmental measure

Run the engine the place that suf ficiently

Industrial waste disposal

Dispose the following parts according the relevant regulations: W aste oil and waste container

Battery

Precautions for handling hydraulic oil

Exposure eyes hydraulic oil will cause W ear protective glasses before handling avoid eye exposed the take the following emergency measures:

• When eye exposed: Immediately wash away with city water suf ficiently till stimulative feeling

• When swallowed: not let and receive medical treatment immediately

• When skin exposed: W ash with water and soap suf ficiently

Others

Use replacement parts and lubricants authorized the genuine parts.

T orque

T

orque specifications for capscrews and nuts

The following torque specifications are indicated case the actual torque value a fastener unknown. Check the capscrews and nuts for their looseness and dropping f before the start daily work and the periodical Retighten the loosened and install new ones for the dropped For the new the check and retightening them must carried out first h For the replacement make sure use the same size manufacturer ’ s genuine

Refer the table below for the tightening and retightening

• The table below not applicable for the capscrews fix the cover , made For the tightening torque for such capscrews, consult with authorized our Distributor Over - tightening may cause damages the parts

• the operator ’ s manual specifies a dif ferent use such value regardless the table below

1

• Numerical indication the capscrew head shows the classification for strength 7 = 7 T indication provided for smaller size

TULI12EXN4032AA

L

TULI12EXN4033AB 2 Capscrew (socket bolt)

TULI12EXN4034AB 3