Mitsubishi FB25K PAC Forklift Trucks Service Repair Manual SN：EFB8C-50001-UP

Service Manual Chassis, Mast & Options FB20K PAC FB25K PAC FB30K PAC FB35K PAC

EFB8C-00011-up EFB8C-50001-up EFB9C-00011-up EFB9C-50001-up

For use with FB20K PAC - FB35K PAC Controller Service Manual.

99759-5A110

FOREWORD

This service manual is a guide for servicing Mitsubishi forklift trucks. For your convenience the instructions are grouped by systems as a ready reference.

The long productive life of your forklift truck(s) depends on regular and proper servicing. Servicing consistent with what you will learn by reading this service manual.

Read the respective sections of this manual carefully and familiarize yourself with all of the components before attempting to start a test, repair or rebuild job.

The descriptions, illustrations and specifications contained in this manual are for the trucks with serial numbers in effect at the time of printing. Mitsubishi forklift trucks reserve the right to change specifications or design without notice and without incurring obligation.

Safety Related Signs The following safety related signs are used in this service manual to emphasize important and critical instructions:

!

WARNING

!

CAUTION

NOTE

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

Indicates a potentially hazardous situation which, if not avoided, may result in death or serious injury or damage to the machine.

Indicates a condition that can cause damage to, or shorten service life of, the machine.

Pub. No. 99759-5A110

!

WARNING

SAFETY

!

WARNING

The proper and safe lubrication and maintenance for these forklift trucks, recommended by Mitsubishi Forklift Truck, are outlined in the OPERATION & MAINTENANCE MANUAL. Improper performance of lubrication or maintenance procedures is dangerous and could result in injury or death. Read and understand the OPERATION & MAINTENANCE MANUAL before performing any lubrication or maintenance on these trucks.

The serviceman or mechanic may be unfamiliar with many of the systems on this truck. This makes it important to use caution when performing service work. A 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 truck components, the serviceman or mechanic should check the weights noted in this Manual. Use proper lifting procedures when removing any components.

Following is a list of basic precautions that should always be observed.

1. Read and understand all warning plates and decals on the truck before operating, lubricating or repairing the product.

2. Always wear protective glasses and protective shoes when working around trucks. In particular, wear protective glasses when pounding on any part of the truck or its attachments with a hammer or sledge. Use welders gloves, hood/goggles, apron and other protective clothing appropriate to the welding job being performed. Do not wear loosefitting or torn clothing. Remove all rings from fingers when working on machinery.

3. Do not work on any truck that is supported only by lift jacks or a hoist. Always use blocks or jack stands to support the truck before performing any disassembly.

!

WARNING

Do not operate these trucks unless you have read and understood the instructions in the OPERATION & MAINTENANCE MANUAL. Improper truck operation is dangerous and could result in injury or death.

4. Lower the forks or other implements to the ground before performing any work on the truck. If this cannot be done, make sure the forks or other implements are blocked correctly to prevent them from dropping unexpectedly.

5. Use steps and grab handles (if applicable) when mounting or dismounting a truck. Clean any mud or debris from steps, walkways or work platforms before using. Always face truck 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.

6. To avoid back injury, use a hoist when lifting components which weigh 23 kg (50 lb.) or more.

Make sure all chains, hooks, slings, etc., are in good condition and are of the correct capacity. Be sure hooks are positioned correctly. Lifting eyes are not to be side loaded during a lifting operation.

7. To avoid burns, be alert for hot parts on trucks which have just been stopped and hot fluids in lines, tubes and compartments.

8. Be careful when removing cover plates. Gradually back off the last two bolts or nuts located at opposite ends of the cover or device and pry cover loose to relieve any spring or other pressure, before removing the last two bolts or nuts completely.

9. Be careful when removing filler caps, breathers and plugs on the truck. 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 truck has just been stopped because fluids can be hot.

10. Always use tools that are in good condition and be sure you understand how to use them before performing any service work.

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

12. If possible, make all repairs with the truck parked on a level, hard surface. Block truck so it does not roll while working on or under truck.

13. Disconnect battery and discharge any capacitors (electric trucks) before starting to work on truck.

Hang “Do not Operate� tag in the Operator ’s Compartment.

14. 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 parent metal.

15. Do not damage wiring during removal operations.

Reinstall the wiring so it is not damaged nor will it be damaged in operation by contacting sharp corners, or by rubbing against some object or hot surface. Place wiring away from oil pipe.

16. 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.

17. Always support the mast and carriage to keep carriage or attachments raised when maintenance or repair work is performed, which requires the mast in the raised position.

18. Loose or damaged fuel, lubricant and hydraulic lines, tubes and hoses can cause fires. Do not bend or strike high pressure lines or install ones which have been bent or damaged. Inspect lines, tubes and hoses carefully. Do not check for leaks with your hands. Pin hole (very small) 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 cardboard or paper to locate pin hole leaks.

19. 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.

20. Relieve all pressure in 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.

21. Do not operate a truck 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.

HOW TO USE THIS MANUAL (Removal, Installation, Assembly and Disassembly) Disassembly diagram (example)

2

1 Procedures are described in the text.

Disassembling sequence 209603

Sequence 1 2

Cover, Bolt, Washer (part name) Snap ring ................ (part name)

Suggestion for disassembling 1. Output shaft, Removing Remove output shaft using a special tool.

209604

Service Data

Gear Backlash A: Standard Value B: Repair or Service Limit

A

0.11 to 0.28 mm (0.0043 to 0.0110 in.)

B

0.5 mm (0.020 in.)

Symbols or abbreviation OP

Option

R1/4

Taper pipe thread (external) 1/4 inch (formerly PT1/4)

Rc1/8

Taper pipe thread (internal) 1/8 inch (formerly PT1/8)

G1/4A

Straight pipe thread (external) 1/4 inch (formerly PF1/4-A)

Rp1/8

Straight pipe thread (internal) 1/8 inch (formerly PS1/8)

Units 1. SI Units are used in this manual.

2. The following table shows the conversion of SI unit and customary unit.

Item Force Pressure Torque

SI unit

Customary unit

1N

0.1020 kgf

(1 lbf)

(0.4536 kgf)

1 kPa

0.0102 kgf/cm2

(1 psi)

(0.0703 kgf/cm2)

1 N路m

0.1020 kgf路m

(1 lbf路ft)

(0.1383 kgf路m)

GROUP INDEX GROUP INDEX

Items

Vehicle Exterior, Models, Serial Number Locations, GENERAL INFORMATION Chassis and Mast Model Identification, Dimensions, Technical Data

1

VEHICLE ELECTRICAL COMPONENTS

Electrical Component Locations, Console Box, Direction Lever, Accelerator Control, Key Switch, Lighting Switch, Fuses, Lamp Specification Chart, Auto-light System, Troubleshooting of Lighting and Horn Systems

2

POWER TRAIN

General Structure, Common Removal and installation Procedures, Power Train Assembly Removal, Power Train Assembly Installation

3

TRANSFER AND DIFFERENTIAL

Structure and Functions, Procedures and Suggestions for Disassembly and Reassembly, Service Data

4

FRONT AXLE

Structure and Functions, Disassembly and Reassembly of Front Axle Assembly, Service Data

5

REAR AXLE

Structure, Procedures and Suggestions for Removal and Installation, Procedures and Suggestions for Disassembly and Reassembly, Adjustment, Troubleshooting, Service Data

6

BRAKE SYSTEM

Specifications, Structure and Functions, Procedures and Suggestions for Disassembly, Inspection and Reassembly, Inspection and Adjustment, Troubleshooting, Service Data

7

STEERING SYSTEM

Specifications, Structure and Functions, Procedures and Suggestions for Removal and Installation, Steering Control Valve, Hydraulic Circuit Diagram, Troubleshooting, Service Data

8

HYDRAULIC SYSTEM

Specifications, Finger-tip Control Type, Mechanical Control Type, Troubleshooting, Service Data

9

MAST AND FORK

Structure and Functions, Removal and Installation, Disassembly and Reassembly, Inspection and Adjustment, Troubleshooting, Service Data

10

SERVICE DATA

Inspection Standards, Periodic Replacement of Parts, Lubrication Standards, Main Component Weights, Tightening Torque for Standard Bolts and Nuts, Special Tool Table

11

OPTIONS

Backup Buzzer Kit, Tire Kit (Non Mark), Foot Direction Control Kit

12

GENERAL INFORMATION 1 Vehicle Exterior ........................................................................................

Models .......................................................................................................

Serial Number Locations .......................................................................

Chassis and Mast Model Identification ...............................................

Dimensions ...............................................................................................

Technical Data ..........................................................................................

1–1 1–1 1–2 1–3 1–4 1–5

GENERAL INFORMATION

Vehicle Exterior

FC armrest (FC models)

Control lever (MC models)

213466

Models This manual applies to FB20K PAC, FB25K PAC, FB30K PAC and FB35K PAC.

Class

Truck Model

Serial Number

2 ton

FB20K PAC

EFB8C-00011-up

2.5 ton

FB25K PAC

EFB8C-50001-up

3 ton

FB30K PAC

EFB9C-00011-up

3.5 ton

FB35K PAC

EFB9C-50001-up

1-1

GENERAL INFORMATION

Serial Number Locations

Mast number

Chassis number

Nameplate

208204

1-2

GENERAL INFORMATION

Chassis and Mast Model Identification

[Chassis] FB

20

K

PAC AC motor Generation designator

Maximum capacity 20: 2000 kg (4400 lb) 25: 2500 kg (5500 lb) 30: 3000 kg (6600 lb) 35: 3500 kg (7700 lb) Battery type

[Mast] 4

R

35

C

30

Maximum lifting height [“30” stands for 3000 mm (118 in.)]

Order of the minor change (“A” for the original, “B” for the first change, “C” for the second change, and so on) Applicable truck model designation 35: 3.5 ton class

Kind of mast R: simplex mast S: duplex mast Y: triplex mast Major change (“2” for the original, “3” for the first change, and so on up to “9”)

1-3

GENERAL INFORMATION

Dimensions

B

E

F

C

D A

213443

1-4

GENERAL INFORMATION

Technical Data Truck model Class

FB20K PAC

FB25K PAC

2.0 ton

2.5 ton

Load capacity/load center

N (kgf)/mm [1bf/in.]

19600 (2000)/500 [4400/20]

24500 (2500)/500 [5500/20]

Truck size

Length to fork face

A mm (in.)

2249 (88.5)

2274 (89.5)

Width

B mm (in.)

1190 (46.9)

1190 (46.9)

Height of overhead guard C mm (in.)

2200 (86.6)

2200 (86.6)

D mm (in.)

1520 (59.8)

1520 (59.8)

kg (lb)

2775 (6118)

2995 (6603)

990/898 (39.0/35.4)

990/898 (39.0/35.4)

Front

23 x 9 – 10

23 x 9 – 10

Rear

18 x 7 – 8

18 x 7 – 8

1950 (76.8)

1970 (77.6)

Wheelbase Truck weight (w/o battery)

E/F mm (in.)

Tread Front/rear Tires size

Turning radius

mm (in.)

Travel speeds Unloaded/loaded

km/h (mph)

20.0/20.0 (12.4/12.4)

20.0/20.0 (12.4/12.4)

Lifting speeds Unloaded/loaded

m (in.)/sec

0.65/0.55 (25.6/21.7)

0.65/0.50 (25.6/19.7)

Lowering speeds Unloaded/loaded

m (in.)/sec

0.50/0.50 (19.7/19.7)

0.50/0.50 (19.7/19.7)

V

80

80

Ah

600

600

mm (in.)

1025 x 708 x 769 (40.4 x 27.9 x 30.3)

1025 x 708 x 769 (40.4 x 27.9 x 30.3)

1385 (3053)

1385 (3053)

6° – 8°

6° – 8°

Battery voltage Battery rated capacity (5 hrs.) MAX Battery compartment size Battery weight

kg (lb)

Tilt angle (forwards – backwards) Traction motor capacity

(60 min. short duty)

kW

14.5

14.5

Pump motor output

@ 15% duty factor

kW

20.0

20.0

Steering pump motor output (60 min. short duty) kW

1.2

1.2

Traction motor control method

MOS-FET

MOS-FET

Pump motor control method

MOS-FET

MOS-FET

1-5

GENERAL INFORMATION

Truck model Class

FB30K PAC

FB35K PAC

3.0 ton

3.5 ton

Load capacity/load center

N (kgf)/mm [1bf/in.]

29400 (3000)/500 [6600/20]

34300 (3500)/500 [7700/20]

Truck size

Length to fork face

A mm (in.)

2522 (99.3)

2577 (101.5)

Width

B mm (in.)

1230 (48.4)

1230 (48.4)

Height of overhead guard C mm (in.)

2250 (88.6)

2259 (88.9)

D mm (in.)

1690 (66.5)

1690 (66.5)

kg (lb)

3231 (7123)

3665 (8080)

990/898 (39.0/35.4)

990/898 (39.0/35.4)

Front

28 x 9 – 15

250 – 15

Rear

18 x 7 – 8

18 x 7 – 8

2180 (85.8)

2230 (87.8)

Wheelbase Truck weight (w/o battery)

E/F mm (in.)

Tread Front/rear Tires size

Turning radius

mm (in.)

Travel speeds Unloaded/loaded

km/h (mph)

20.0/20.0 (12.4/12.4)

18.0/16.5 (11.2/10.3)

Lifting speeds Unloaded/loaded

m (in.)/sec

0.60/0.45 (23.6/17.7)

0.55/0.40 (21.7/15.7)

Lowering speeds Unloaded/loaded

m (in.)/sec

0.50/0.50 (19.7/19.7)

0.50/0.50 (19.7/19.7)

V

80

80

Ah

750

750

mm (in.)

1025 x 852 x 769 (40.4 x 33.5 x 30.3)

1025 x 852 x 769 (40.4 x 33.5 x 30.3)

1872 (4127)

1872 (4127)

6° – 8°

6° – 8°

Battery voltage Battery rated capacity (5 hrs.) MAX Battery compartment size Battery weight

kg (lb)

Tilt angle (forwards – backwards) Traction motor capacity

(60 min. short duty)

kW

14.5

14.5

Pump motor output

@ 15% duty factor

kW

20.0

20.0

Steering pump motor output (60 min. short duty) kW

1.2

1.2

Traction motor control method

MOS-FET

MOS-FET

Pump motor control method

MOS-FET

MOS-FET

1-6

VEHICLE ELECTRICAL COMPONENTS Electrical Component Locations .......................................................... 2 – 1 Console Box ............................................................................................. 2 – 5 Functions of Central Vehicle Monitor System (CVMS) ............................... 2 – 5 Electrical Components in Console Box ..................................................... 2 – 8 Disassembly and Reassembly .................................................................. 2 – 9

Direction Lever .........................................................................................

Accelerator Control .................................................................................

Key Switch ................................................................................................

Lighting Switch .........................................................................................

Fuses .........................................................................................................

Lamp Specification Chart .......................................................................

Auto-light System ....................................................................................

Troubleshooting of Lighting and Horn Systems ................................

Electrical System of FC (Finger-tip Control System) .......................

2 – 10 2 – 11 2 – 12 2 – 12 2 – 13 2 – 13 2 – 14 2 – 15 2 – 16

Nomenclature ........................................................................................... 2 – 16 Precautions to be taken when handling FC system .................................. 2 – 17 Description ................................................................................................ 2 – 17 Operating Principles ................................................................................. 2 – 18 How to Set Controller (Setup Option Setting) ........................................... 2 – 20 Troubleshooting ........................................................................................ 2 – 21

2

VEHICLE ELECTRICAL COMPONENTS

Electrical Component Locations

Detail "A" 6

1

7

2

A

3 4

5

9

8

Detail "B"

13

10 B 12

11 213444

1 2 3 4 5 6 7

Central vehicle monitoring system (CVMS) Direction lever Lighting switch Key switch Auto-light switch Head lamp Auto-light sensor

8 9 10 11 12 13

2-1

Contactor Fuse holder DC/DC converter Horn Foot brake switch FC hydraulic control valve

VEHICLE ELECTRICAL COMPONENTS

14

15

211649

14 Parking brake switch

15 Brake fluid level sensor

2-2

VEHICLE ELECTRICAL COMPONENTS

16

19

18 17

213445

16 FC armrest (FC only) 17 Controller cooling fan

18 Controller assembly 19 Contactor assembly

2-3

VEHICLE ELECTRICAL COMPONENTS

24

D

C

Detail "D"

Detail "C" 22

21

23

20

20 Traction motor 21 Traction motor thermal and speed sensor 22 Pump motor

23 Pump motor thermal and speed sensor 24 Steering pump motor

2-4

213446

VEHICLE ELECTRICAL COMPONENTS

Console Box 1 2 3 4 5 6 7

1

Central vehicle monitoring system (CVMS) Mode selector button Tilt steering column lock/unlock lever Key switch Lighting switch Mode check button Auto light switch

6

2

5

4 3

7 206900

NOTE For setting the clock and selection of KPH or MPH, refer to “Selection of KPH or MPH” and “Setting the clock”.

Functions of Central Vehicle Monitor System (CVMS)

209510

Operations

No. 1

2

Monitor name

When OFF

When ON or flashing

Service indicator

Starts flashing 20 hours before set time. Remains ON when set time is reached.

Controller/motor overheat indicator

Controller, traction motors and pump motor in normal temperature

Overheat

Remaining battery charge warning indicator

Normal battery condition

Flashing indicates battery needs to be recharged soon.

ON indicates battery needs to be recharged and lifting function inoperable.

3

4

Remarks

Brake fluid level indicator Normal fluid level

Low fluid level 2-5

Overheat causes significant output loss. When component temperature lowers to normal level, output power returns.

VEHICLE ELECTRICAL COMPONENTS

No.

Monitor name

When OFF

When ON or flashing

Remarks

5

Parking brake indicator Parking brake disengaged

Parking brake engaged

6

Fault detection indicator

Normal

Vehicle malfunction

Vehicle speed and error code display

Displays the vehicle speed during normal operation and displays an error code in the event of a malfunction.

Battery discharge indicator (BDI)

The battery charge status is indicated by the ten element indicator. When fully charged, all elements are lit through to the right side. As the battery discharges, the indicator elements decrease toward the left side. When only one element is on, the remaining battery charge warning indicator 3 in the LED section will flash. When the indicator completely goes off, the remaining battery charge indicator 3 will be continuously lit and the vehicle enters power reduction mode.

Hourmeter, time display

It normally displays the time.

When the key switch is set to the I (ON) position, the traction motor, pump motor, and vehicle service hours are indicated sequentially.

7

8

9

Error codes appear on the error code display.

The vehicle speed display can be switched between KPH and MPH. Follow the steps in “Selection of KPH or MPH” below.

The time of clock can be adjusted. Follow the steps in “Setting the clock” below.

Selection of KPH or MPH

1. Apply the parking brake.

Button 2

2. Place the direction lever in NEUTRAL. 3. Turn the key switch to the I (ON) position.

Button 1

4. Push and hold button 1 for one to two seconds.

NOTICE: Display will show KPH and a 24-hour clock until it is changed. When MPH is selected, the clock will change to a 12-hour clock.

Setting the clock

209600A

1. Apply the parking brake.

2. Place the direction lever in NEUTRAL. 3. Turn the key switch to the I (ON) position.

4. Push and hold button 1 until the minutes’ display flashes.

5. Release button 1.

6. Adjust the minutes with button 2.

7. Push button 1 and release when the hours’ display flashes.

8. Adjust the hour with button 2.

9. Push button 1 to lock in the time.

2-6

VEHICLE ELECTRICAL COMPONENTS Error code display

Indication

Condition

E

If the key switch is turned I (ON) while the direction lever is either in the forward or reverse position and/or if the accelerator pedal is depressed.

(E)

Faulty setting of seat switch

E 0

ON

Traction motor overheated

E 2

ON

Pump motor overheated

E 3

ON

Traction module overheated

E 7

ON

Hydraulic module overheated

H 1

ON

Faulty setting of lift lever

H 2

ON

Faulty setting of tilt lever

H 3

ON

Faulty setting of attachment lever 1

H 4

ON

Faulty setting of attachment lever 2

L O

ON

Battery consumption too much

(E) indicates flashing E. NOTICE: For details of the error codes and their conditions, see Controller Service Manual.

2-7

VEHICLE ELECTRICAL COMPONENTS

Electrical Components in Console Box

Monitor harness Direction lever harness

2 3 1

211652

1 2

Key switch Lighting switch

3

2-8

Auto light switch

VEHICLE ELECTRICAL COMPONENTS

Disassembly and Reassembly Disassembly

2

1 5

3 4 211653

Sequence 1 2 3

Console box (front panel) Central vehicle monitor panel Direction lever

4 5

Tilt steering column lock/unlock lever Console box (rear panel)

Disassembly procedure (1) Remove the front panel and monitor panel from the console box.

(2) Disconnect the harness connectors from the horn and direction lever.

(3) Remove the screw from the tilt steering column lock/unlock lever, and remove the lever from the rear panel of the console box.

(4) Remove the rear panel.

Tilt steering column lock/unlock lever 211645

Reassembly Follow the disassembly procedure in reverse.

2-9

VEHICLE ELECTRICAL COMPONENTS

Direction Lever Structure

4

1

2 3

211646

1 2

Lever Harness

3 4

2-10

Connector Screw, Spring washer

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