wsm L503, L4630, L3830, L3430, L3130 Workshop Manual

WORKSHOP MANUAL

TRACTOR

L3130,L3430,L3830,

L4630,L5030

KiSC issued 02, 2007 A

TO THE READER

KiSC issued 02, 2007 A

This Workshop Manual has been prepared to provide servicing personnel with
information on the me chanism, service and mainte nance of KUBOTA Tractor L3 130,
L3430, L3830, L4630 and L5030. It is divided into two parts, “Mechanism” and
“Servicing” for each section.

■ Mechanism

Information on the construction and function are included. This part should be
understood before proceeding with troubleshooting, disassembling and servicing.

Refer to Diesel engine / Tr actor Mechanism Workshop Manu al (Code No. 97897­01872 / 97897-18200) for the one which has not been described to this workshop
manual.

■ Servicing

The heading “Gener al” includes general prec autions, check and ma intenance and
special tools. Other section, there are troubleshooting, servicing specification lists,
checking and adjusting, disassembling and assembling, and servicing which cover
procedures, precautions, factory specifications and allowable limits.

All information illustrations and specifications contained in this manual are based on
the latest product information available at the time of publication.

The right is reserved to make changes in all information at any time without notice.

© KUBOTA Corporation 2003

November 2003

L3130 · L3430 · L3830 · L4630 · L5030, WSM

SAFETY FIRST

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

SAFETY INSTRUCTIONS

This symbol, the industry’s “Safety Alert Symbol”, is used throughout this manual and on labels on

the machine itself to warn of the possibility of personal injury. Read these instructions carefully.

It is essential that you read the instructions and safety regulations before you attempt to repair or use

this unit.

DANGER : Indicates an imminently hazardous situation which, if not avoided, will result in

death or serious injury.

WARNING : Indicates a potentially hazardous situation which, if not avoided, could result in

death or serious injury.

CAUTION : Indicates a potentially hazardous situation which, if not avoided, may result in

minor or moderate injury.

■ IMPORTANT : Indicates that equipment or property damage could result if instructions are not

followed.

■ NOTE : Gives helpful information.

BEFORE SERVICING AND REPAIRING

• Read all instructions and safety instructions in this
manual and on your machine safety decals.

• Clean the work area and machine.

• Park the machine on a firm and level ground, and set
the parking brake.

• Lower the implement to the ground.

• Stop the engine, and remove the key.

• Disconnect the battery negative cable.

• Hang a “DO NOT OPERATE” tag in operator
station.

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

SAFETY STARTING

• Do not start the engine by shorting across starter
terminals or bypassing the safety start switch.

• Do not alter or remove any part of machine safety
system.

• Before starting the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.

• Never start the engine while standing on ground.
Start the engine only from operator’s seat.

SAFETY WORKING

• Do not work on the machine while under the influence
of alcohol, medication , or other substances or while
fatigued.

• Wear close fitting clothing and safety equipment
appropriate to the job.

• Use tools appropriate to the work. Makeshift tools,
parts, and procedures are not recommended.

• When servicing is performed together by two or more
persons, take care to perform all work safely.

• Do not work under the machine that is supported
solely by a jack. Always support the machine by
safety stands.

• Do not touch the rotating or hot parts while the engine
is running.

• Never remove the radiator cap while the engine is
running, or immediately after stopping. Otherwise, hot
water will spout out from radiator. Only remove
radiator cap when cool enough to touch with bare
hands. Slowly loosen the cap to first stop to relieve
pressure before removing completely.

• Escaping fluid (fuel or hydraulic oil) un der pressure
can penetrate the skin causing serious injury. Relieve
pressure before disconnecting hydraulic or fuel lines.
Tighten all connections before applying pressure.

AVOID FIRES

• Fuel is extremely flammable and explosive under
certain conditions. Do not smoke or allow flames or
sparks in your working area.

• To avoid sparks from an accidental short circuit,
always disconnect the battery negative cable first and
connect it last.

• Battery gas can explode. Keep sparks and open
flame away from the top of b attery, especially when
charging the battery.

• Make sure that no fuel has been spilled on the engine.

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

VENTILATE WORK AREA

• If the engine must be running to do some work, make
sure the area is well ventilated . Neve r run the eng ine
in a closed area. The exhaust gas contains poisonous
carbon monoxide.

PREVENT ACID BURNS

• Sulfuric acid in batte ry electrolyte is poisonou s. It is
strong enough to burn skin, clothing and cause
blindness if splashed into eyes. Keep electrolyte
away from eyes, hands and clothing. If you spill
electrolyte on yourself, flush with water, and get
medical attention immediately.

DISPOSE OF FLUIDS PROPERLY

• Do not pour fluids into the ground, down a drain, or
into a stream, pond, or lake. Observe relevant
environmental prot ectio n regulati ons whe n disp osing
of oil, fuel, coolant, electrolyte and other harmful
waste.

PREPARE FOR EMERGENCIES

• Keep a first aid kit and fire extingui sher handy at all
times.

• Keep emergency numbers for doctors, ambulance
service, hospital and fire department near your
telephone.

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

SAFETY DECALS

The following safety decals are installed on the machine.
If a decal becomes damaged, illegible or is not on the machine, replace it. The decal part number is listed in
the parts list.

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

5

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

6

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SAFETY INSTRUCTIONS

7

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SPECIFICATIONS

ROPS Type

Model

Model D1503-MA-E-GST-EU D1703-MA-E-GST-EU
Type Indirect injection vertical, water-cooled, 4-cycle diesel
Number of cylinders 3
Total displacement 1.499 L (91.5 cu.in.) 1.647 L (100.5 cu.in.)
Bore and stroke 83 × 92.4 mm (3.3 × 3.6 in.) 87 × 92.4 mm (3.4 × 3.6 in.)

Engine

Capacities

Dimensions

Weight (with ROPS) 1480 kg (3265 lbs) 1460 kg (3220 lbs)

Travelling
system

Hydraulic
system

PTO

Note : * Manufacture’s estimate

The company reserves the right to change the specifications without notice.

Net power 23.1 kW (31.0 HP)* 25.1 kW (33.6 HP)*
PTO power

(factory observe)
Maximum torque 102.9 N·m (10.5 kgf·m, 75.9 ft-lbs) 108.3 N·m (11.05 kgf·m, 79.9 ft-lbs)
Battery capacity 12 V, RC : 123 min, CCA : 490 A
Fuel Diesel fuel No. 1 [below −10 °C (14 °F], Diesel fuel No. 2-D [above −10 °C (14 °F)]
Fuel tank 40 L (10.6 U.S.gals, 8.8 Imp.gals)
Engine crankcase

(with filter)
Engine coolant 6.0 L (6.3 U.S.qts, 5.3 Imp.qts)
Transmission case 42 L (11.1 U.S.gals, 9.2 Imp.gals)
Overall length

(without 3P)
Overall width (min. tread) 1430 mm (56.3 in.)
Overall height

(with ROPS)
Wheel base 1805 mm (71.1 in.)
Min. ground clearance 370 mm (14.6 in.)

Tread

Standard
tire size

Clutch Dry type single stage
Steering Hydrostatic power steering

Transmission
Braking system Wet disk type

Min. turning radius
(with brake)

Hydraulic control system Position control
Pump capacity 31.5 L (8.3 U.S.gals, 6.9 Imp.gals) / min.
Three point hitch SAE Category 1

Max. lift
force

System pressure 17.7 MPa (180 kgf/cm
Rear PTO SAE 1-3/8, 6 splines
PTO / Engine speed 540 min

Front 1150 mm (45.3 in.)
Rear 1110 mm (43.7 in.), 1205 mm (47.4 in.), 1300 mm (51.2 in.), 1385 mm (54.5 in.)

Front 7-16
Rear 12.4-24

At lift points 1700 kg (3750 lbs)
24 in. behind

lift points

19.0 kW (25.8 HP)* / 2700 min

(with creep speed model : F16, R16 fully synchronized main and shuttle transmission)

L3130 L3430

Manual Transmission

−1

(rpm) 21.3 kW (29.0 HP)* / 2700 min−1 (rpm)

5.7 L (6.0 U.S.qts, 5.0 Imp.qts)

3025 mm (119.1 in.) 3015 mm (118.7 in.)

2255 mm (88.8 in.) 2415 mm (95.1 in.)

F8, R8 fully synchronized main and shuttle transmission

2.7 m (8.9 feet)

1200 kg (2650 lbs)

2

, 2560 psi)

−1

(rpm) / 2550 min−1 (rpm), 750 min−1 (rpm) / 2250 min−1 (rpm)

SPECIFICATIONS

W10281170

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

SPECIFICATIONS

ROPS Type

Model

Model D1803-MA-E-GST-EU V2203-MA-E-G ST-EU
Type Indirect injection vertical, water-cooled, 4-cycle diesel
Number of cylinders 3 4
Total displacement 1.826 L (111.4 cu.in.) 2.197 L (134.1 cu.in.)
Bore and stroke 87 × 102.4 mm (3.4 × 4.0 in.) 87 × 92.4 mm (3.4 × 3.6 in.)

Engine

Capacities

Dimensions

Weight (with ROPS) 1500 kg (3305 lbs) 1520 kg (3351 lbs)

Travelling
system

Hydraulic
system

PTO

Note : * Manufacture’s estimate

The company reserves the right to change the specifications without notice.

Net power 27.9 kW (37.4 HP)* 33.3 kW (44.7 HP)*
PTO power

(factory observe)
Maximum torque 120.7 N·m (12.3 kgf·m, 89.0 ft-lbs) 146.2 N·m (14.9 kgf·m, 107.8 ft-lbs)
Battery capacity 12 V, RC : 133 min, CCA : 582 A
Fuel Diesel fuel No. 1 [below −10 °C (14 °F], Diesel fuel No. 2-D [above −10 °C (14 °F)]
Fuel tank 40 L (10.6 U.S.gals, 8.8 Imp.gals)
Engine crankcase

(with filter)
Engine coolant 7.5 L (7.9 U.S.qts, 6.6 Imp.qts)
Transmission case 43 L (11.4 U.S.gals, 9.5 Imp.gals)
Overall length

(without 3P)
Overall width (min. tread) 1485 mm (58.5 in.)
Overall height

(with ROPS)
Wheel base 1840 mm (72.4 in.) 1895 mm (74.6 in.)
Min. ground clearance 400 mm (15.7 in.)

Tread

Standard
tire size

Clutch Dry type single stage
Steering Hydrostatic power steering

Transmission
Braking system Wet disk type

Min. turning radius
(with brake)

Hydraulic control system Position control
Pump capacity 31.5 L (8.3 U.S.gals, 6.9 Imp.gals) / min. 37.0 L (9.8 U.S.gals, 8.1 Imp.gals) / min.
Three point hitch SAE Category 1

Max. lift
force

System pressure 17.7 MPa (180 kgf/cm
Rear PTO SAE 1-3/8, 6 splines
PTO / Engine speed 540 min

Front 1145 mm (45.1 in.)
Rear 1140 mm (44.9 in.), 1210 mm (47.6 in.), 1310 mm (51.6 in.), 1410 mm (55.5 in.)

Front 8-16
Rear 13.6-24

At lift points 1750 kg (3860 lbs)
24 in. behind

lift points

23.9 kW (32.5 HP)* / 2700 min

6.7 L (7.1 U.S.qts, 5.9 Imp.qts) 8.2 L (8.7 U.S.qts, 7.2 Imp.qts)

(with creep speed model : F16, R16 fully synchronized main and shuttle transmission)

L3830 L4630

Manual Transmission

−1

(rpm) 29.5 kW (40.1 HP)* / 2700 min−1 (rpm)

3075 mm (121.1 in.) 3170 mm (124.8 in.)

2420 mm (95.3 in.)

F8, R8 fully synchronized main and shuttle transmission

2.7 m (8.9 feet)

1250 kg (2760 lbs)

2

, 2560 psi)

−1

(rpm) / 2550 min−1 (rpm), 750 min−1 (rpm) / 2250 min−1 (rpm)

W10359440

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

CABIN Type

Model

Model D1803-MA-E-GST-EU V2203-MA-E-GST-EU
Type Indirect injection vertical, water-cooled, 4-cycle diesel
Number of cylinders 3
Total displacement 1.826 L (111.4 cu.in.) 2.197 L (134.1 cu.in.)
Bore and stroke 87 × 102.4 mm (3.4 × 4.0 in.) 87 × 92.4 mm (3.4 × 3.6 in.)

Engine

Net power 27.9 kW (37.9 HP)* 33.3 kW (45.3 HP)*
PTO power

(factory observe)
Maximum torque
Battery capacity 12 V, RC : 133 min, CCA : 582 A

Fuel Diesel fuel No. 1 [below −10 °C (14 °F], Diesel fuel No. 2 [above −10 °C (14 °F)]
Fuel tank 40 L (10.6 U.S.gals, 8.8 Imp.gals)

Capacities

Engine crankcase
(with filter)

6.7 L (7.1 U.S.qts, 5.9 Imp.qts) 8.2 L (8.7 U.S.qts, 7.2 Imp.qts)

Engine coolant 8.7 L (9.2 U.S.qts, 7.7 Imp.qts)
Transmission case 43 L (11.4 U.S.gals, 9.5 Imp.gals)
Overall length

(without 3P)
Overall width (min. tread) 1485 mm (58.5 in.)
Overall height 2195 mm (86.4 in.)

Dimensions

Wheel base 1840 mm (72.4 in.)
Min. ground clearance 400 mm (15.7 in.)

Tread

Front 1145 mm (45.1 in.)
Rear 1140 mm (44.9 in.), 1210 mm (47.6 in.), 1310 mm (51.6 in.), 1410 mm (55.5 in.)

Weight 1640 kg (3616 lbs) 1690 kg (3726 lbs)

Standard
tire size

Front 8-16
Rear 13.6-24

Clutch Dry type single stage

Travelling
system

Steering Hydrostatic power steering
Transmission 16 forward and 16 reverse speeds
Braking system Wet disk type

Min. turning radius
(with brake)

Hydraulic control system Position control

31.5 L (8.3 U.S.gals, 6.9

Hydraulic
system

Pump capacity
Three point hitch SAE Category 1

Max. lift
force

At lift points 1750 kg (3860 lbs)
24 in. behind

lift points
System pressure 17.7 MPa (180 kgf/cm
Rear PTO SAE 1-3/8, 6 splines

PTO

PTO / Engine speed

540 min

(rpm), 750 min

Note : * Manufacture’s estimate

The company reserves the right to change the specifications without notice.

L3830 L4630

Manual Transmission GST

4

23.9 kW (32.5 HP)* /
2700 min

(12.3 kgf·m, 89.0 ft-lbs)

−1

(rpm)

120.7 N·m

29.5 kW (40.1 HP)* / 2700 min−1 (rpm)

146.2 N·m (14.9 kgf·m, 107.8 ft-lbs)

3075 mm (121.1 in.) 3170 mm (124.8 in.)

1895 mm (74.6 in.)

24 forward and 16 reverse

2.7 m (8.9 feet)

Imp.gals) / min.

37.0 L (9.8 U.S.gals, 8.1 Imp.gals) / min.

1250 kg (2760 lbs)

2

, 2560 psi)

−1

(rpm) / 2550 min−1

−1

2250 min

−1

(rpm)

(rpm) /

540 min

−1

(rpm) / 2550 min−1 (rpm)

SPECIFICATIONS

speeds

W10390020

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

CABIN Type

Model

Model V2403-MA-E-GST-EU
Type Indirect injection vertical, water-cooled, 4-cycle diesel
Number of cylinders 4
Total displacement 2.434 L (148.5 cu.in.)
Bore and stroke 87 × 102.4 mm (3.4 × 4.0 in.)

Engine

Capacities

Dimensions

Weight 1840 kg (4057 lbs) 1860 kg (4101 lbs)

Travelling
system

Hydraulic
system

PTO

Note : * Manufacture’s estimate

The company reserves the right to change the specifications without notice.

Net power 37.3 kW (50.7 HP)*
PTO power

(factory observe)
Maximum torque 162.4 N·m (16.6 kgf·m, 119.8 ft-lbs)
Battery capacity 12 V, RC : 133 min, CCA : 582 A
Fuel Diesel fuel No. 1 [below −10 °C (14 °F], Diesel fuel No. 2 [above −10 °C (14 °F)]
Fuel tank 43 L (11.4 U.S.gals, 9.5 Imp.gals)
Engine crankcase

(with filter)
Engine coolant 9.2 L (9.7 U.S.qts, 8.1 Imp.qts)
Transmission case 45 L (11.9 U.S.gals, 9.9 Imp.gals)
Overall length

(without 3P)
Overall width (min. tread) 1470 mm (57.9 in.)
Overall height 2275 mm (89.6 in.)
Wheel base 1915 mm (75.4 in.)
Min. ground clearance 425 mm (16.7 in.)

Tread

Standard
tire size

Clutch Dry type single stage
Steering Hydrostatic power steering

Transmission
Braking system Wet disk type

Min. turning radius
(with brake)

Hydraulic control system Position control
Pump capacity 37.0 L (9.8 U.S.gals, 8.1 Imp.gals) / min.
Three point hitch SAE Category 1

Max. lift
force

System pressure 17.7 MPa (180 kgf/cm
Rear PTO SAE 1-3/8, 6 splines

PTO / Engine speed 540 min

Front 1135 mm (44.7 in.)
Rear 1125 mm (44.3 in.), 1225 mm (48.2 in.), 1325 mm (52.2 in.)

Front 9.5-16
Rear 13.6-28

At lift points 1750 kg (3860 lbs)
24 in. behind

lift points

Manual Transmission GST HST

32.8 kW (44.6 HP)* / 2700 min

8.2 L (8.7 U.S.qts, 7.2 Imp.qts)

16 forward and 16 reverse

speeds

−1

(rpm) / 2550 min−1 (rpm)

24 forward and 16 reverse

L5030

−1

(rpm)

3245 mm (127.8 in.)

speeds

3.2 m (10.5 feet)

1350 kg (2976 lbs)

2

, 2560 psi)

SPECIFICATIONS

31.7 kW (43.1 HP)* /
2700 min−1 (rpm)

3 speeds

540 min−1 (rpm) /
2660 min−1 (rpm)

W10399600

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

TRAVELLING SPEEDS

TRAVELLING SPEEDS

[Manual Transmission Type]

Model L3130 L3830 - L4630

Tire size (Rear) 12.4-24 13.6-24
Shuttle shift

lever

Forward
(At rated engine
rpm)

Reverse
(At rated engine
rpm)

The company reserves the right to change the specifications without notice.

Range gear shift
lever

Low

High

Low

High

Main gear shift
lever

1 1 .81 (1 .1) 1 .68 (1.0)
2 2 .56 (1 .6) 2 .38 (1.5)
3 4 .16 (2 .6) 3 .86 (2.4)
4 6 .14 (3 .8) 5 .71 (3.5)
1 9 .13 (5 .7) 8 .49 (5.3)
2 12.91 (8.0) 12.01 (7.5)
3 20.96 (1 3.0) 19.49 (12.1)
4 30.96 (1 9.2) 28.78 (17.9)
1 1 .51 (0 .9) 1 .40 (0.9)
2 2 .13 (1 .3) 1 .98 (1.2)
3 3 .46 (2 .1) 3 .22 (2.0)
4 5.11 (3.2) 4.76 (3.0)
1 7 .61 (4 .7) 7 .07 (4.4)
2 10.76 (6.7) 10.01 (6.2)
3 17.47 (1 0.9) 16.24 (10.1)
4 25.80 (1 6.0) 23.99 (14.9)

km/h (mph) km/h (mph)

W1035065

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L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

TRAVELLING SPEEDS

[With Creep Speed Model]

Model L3130 L3830 - L4630 L5030

Creep gear shift lever High Low High Low High Low
Tire size (Rear) 12.4-24 13.6-24 13.6-28

Shuttle
shift lever

Range
gear shift
lever

Main gear
shift lever

km/h

(mph)

km/h

(mph)

km/h

(mph)

km/h

(mph)

km/h

(mph)

km/h

(mph)

1 1.81 (1.1) 0.20 (0.1) 1.68 (1.0) 0.19 (0.1) 1.77 (1.1) 0.20 (0.1)
2 2.56 (1.6) 0.29 (0.2) 2.38 (1.5) 0.27 (0.2) 2.51 (1.6) 0.28 (0.2)

Low

3 4.16 (2.6) 0.47 (0.3) 3.86 (2.4) 0.43 (0.3) 4.07 (2.5) 0.46 (0.3)
4 6.14 (3.8) 0.69 (0.4) 5.71 (3.5) 0.64 (0.4) 6.02 (3.7) 0.68 (0.4)

Forward
(At rated
engine
rpm)

High

1 9.13 (5.7) 1.02 (0.6) 8.49 (5.3) 0.95 (0.6) 8.95 (5.6) 1.00 (0.6)
2

3

4

12.91
(8.0)

20.96

(13.0)

30.96

(19.2)

1.45 (0.9)

2.35 (1.5)

3.48 (2.2)

12.01
(7.5)

19.49

(12.1)

28.78

(17.9)

1.35 (0.8)

2.19 (1.4)

3.23 (2.0)

12.66
(7.9)

20.54

(12.8)

30.34

(18.9)

1.42 (0.9)

2.31 (1.4)

3.41 (2.1)

1 1.51 (0.9) 0.17 (0.1) 1.40 (0.9) 0.16 (0.1) 1.48 (0.9) 0.17 (0.1)
2 2.13 (1.3) 0.24 (0.1) 1.98 (1.2) 0.22 (0.1) 2.09 (1.3) 0.23 (0.1)

Low

3 3.46 (2.1) 0.39 (0.2) 3.22 (2.0) 0.36 (0.2) 3.39 (2.1) 0.38 (0.2)
4 5.11 (3.2) 0.57 (0.4) 4.76 (3.0) 0.53 (0.3) 5.01 (3.1) 0.56 (0.3)

Reverse
(At rated
engine
rpm)

High

1 7.61 (4.7) 0.85 (0.5) 7.07 (4.4) 0.79 (0.5) 7.45 (4.6) 0.84 (0.5)
2

3

4

10.76
(6.7)

17.47

(10.9)

25.80

(16.0)

1.21 (0.8)

1.96 (1.2)

2.90 (1.8)

10.01
(6.2)

16.24

(10.1)

23.99

(14.9)

1.12 (0.7)

1.82 (1.1)

2.69 (1.7)

10.55
(6.6)

17.12

(10.6)

25.28

(15.7)

1.18 (0.7)

1.92 (1.2)

2.84 (1.8)

The company reserves the right to change the spe cifi ca tion s with out notic e.

W1044901

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KiSC issued 02, 2007 A

TRAVELLING SPEEDS

[GST Type (with creep speed model)]

Model L4630 L5030

Creep gear shift lever High Low High Low
Tire size (Rear) 13.6-24 13.6-28
Shuttle shift

lever

Main gear shift
lever

km/h (mph) km/h (mph)

1 1.68 (1.0) 0.19 (0.1) 1.77 (1.1) 0.20 (0.1)
2 2.38 (1.5) 0.27 (0.2) 2.51 (1.6) 0.28 (0.2)
3 3.07 (1.9) 0.35 (0.2) 3.24 (2.0) 0.36 (0.2)
4 3.86 (2.4) 0.43 (0.3) 4.07 (2.5) 0.46 (0.3)
5 4.54 (2.8) 0.51 (0.3) 4.78 (3.0) 0.54 (0.3)

Forward

6 5.71 (3.5) 0.64 (0.4) 6.02 (3.7) 0.68 (0.4)

(At rated engine
rpm)

7 6.75 (4.2) 0.76 (0.5) 7.12 (4.4) 0.80 (0.5)
8 8.49 (5.3) 0.95 (0.6) 8.95 (5.6) 1.00 (0.6)

9 9.55 (5.9) 1.07 (0.7) 10.07 (6.3) 1.13 (0.7)
10 12.01 (7.5) 1.35 (0.8) 12.66 (7.9) 1.42 (0.9)
11 19.49 (12.1) 2.19 (1.4) 20.54 (12.8) 2.31 (1.4)
12 28.78 (17.9) 3.23 (2.0) 30.34 (18.9) 3.41 (2.1)

1 1.40 (0.9) 0.16 (0.1) 1.48 (0.9) 0.17 (0.1)

2 1.98 (1.2) 0.22 (0.1) 2.09 (1.3) 0.23 (0.1)

3 3.22 (2.0) 0.36 (0.2) 3.39 (2.1) 0.38 (0.2)

Reverse

4 4.76 (3.0) 0.53 (0.3) 5.01 (3.1) 0.56 (0.3)

(At rated engine
rpm)

5 7.07 (4.4) 0.79 (0.5) 7.45 (4.6) 0.84 (0.5)

6 10.01 (6.2) 1.12 (0.7) 10.55 (6.6) 1.18 (0.7)

7 16.24 (10.1) 1.82 (1.1) 17.12(10.6) 1.92 (1.2)

8 23.99 (14.9) 2.69 (1.7) 25.28 (15.7) 2.84 (1.8)

The company reserves the right to change the specifications without notice.

W1032246

[HST Type]

Model L5030

Tire size (Rear) 14.9-26
Shuttle shift lever Range gear shift lever km/h (mph)

L 0 to 6.10 (0 to 3.8)

Forward
(At rated engine rpm)

M 0 to 11.80 (0 to 7.3)
H 0 to 28.60 (0 to 17.8)

L 0 to 5.50 (0 to 3.4)

Reverse
(At rated engine rpm)

M 0 to 10.60 (0 to 6.6)
H 0 to 25.70 (0 to 16.0)

The company reserves the right to change the specifications without notice.

14

W1034865

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

DIMENSIONS

[L3130, L3430, L3830]

DIMENSIONS

15

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

[L4630, L5030]

DIMENSIONS

16

G GENERAL

KiSC issued 02, 2007 A

GENERAL

KiSC issued 02, 2007 A

CONTENTS

1. TRACTOR IDENTIFICATION ......................................................................... G-1

2. GENERAL PRECAUTIONS ............................................................................ G-2

3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING..G-3

[1] WIRING .......................................................... ................................ ........... G-3

[2] BATTERY................................................................................................... G-5

[3] FUSE.......................................................................................................... G-5

[4] CONNECTOR............................................................................................ G-5

[5] HANDLING OF CIRCUIT TESTER......................................................... G-6

4. LUBRICANTS, FUEL AND COOLANT ......................................................... G-7

5. TIGHTENING TORQUES ............................. ....... ...... ....... ...... ....... ...... ....... .. G-10

[1] GENERAL USE SCREWS, BOLTS AND NUTS................................. G-10

6. MAINTENANCE............................................................................................. G-11

7. CHECK AND MAINTENANCE......... ...... ...... ....... ...... ....... ...... ....... ............... G-14

[1] DAILY CHECK........................................................................................ G-14

[2] CHECK POINTS OF INITIAL 50 HOURS........................................... G-15

[3] CHECK POINTS OF EVERY 50 HOURS........................................... G-19

[4] CHECK POINTS OF EVERY 100 HOURS........................................ G-22

[5] CHECK POINTS OF EVERY 200 HOURS......................................... G-27

[6] CHECK POINTS OF EVERY 400 HOURS......................................... G-31

[7] CHECK POINTS OF EVERY 600 HOURS......................................... G-31

[8] CHECK POINTS OF EVERY 800 HOURS......................................... G-31

[9] CHECK POINTS OF EVERY 1 YEAR ................................................ G-32

[10]CHECK POINTS OF EVERY 2 YEARS.............................................. G-32

[11]OTHERS .................................................................................................. G-34

8. SPECIAL TOOLS.......................................................................................... G-39

[1] SPECIAL TOOLS FOR ENGINE .......................................................... G-39

[2] SPECIAL TOOLS FOR TRACTOR....................................................... G-47

9. TIRES............................................................................................................. G-55

[1] TIRE PRESSURE................................................................................... G-55

[2] TREADS ADJUSTMENT ........................................................................ G-56

(1) Front Wheels...................................................................................... G-56

(2) Rear Wheels ...................................................................................... G-56

[3] TIRE LIQUID INJECTION...................................................................... G-58

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

1. TRACTOR IDENTIFICATION

When contacting your loca l KUBOTA distr ibutor, alway s specify

engine serial number, tractor serial number and hour meter reading.

G GENERAL

(1) T ractor Identification Plate
(2) CABIN Identification Plate

(CABIN Serial Number)

(3) T ractor Serial Number

(4) Engine Serial Number
(5) Hour Meter (IntelliPanel Display)
(6) ROPS Identification Plate

(ROPS Serial Number)

W10106000

G-1

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

2. GENERAL PRECAUTIONS

• During disa ssembly, ca refully ar range removed parts in a cle an
area to prevent confusion later. Screws, bolts and nuts should be
installed in their original position to prevent reassembly errors.

• When special tools are requi red, use KUBOT A genuine speci al
tools. Special tools which are not frequently used should be
made according to the drawings provided.

• Before disassembling or servicing electrical wires, always
disconnect the ground cable from the battery first.

• Remove oil and dirt from parts before measuring.

• Use only KUBOTA genuine parts for parts replacement to
maintain machine performance and to assure safety.

• Gaskets and O-rings must be replaced during reassembly.
Apply grease to new O-rings or oil seals before assembling.
See the figure left side.

• When reassem bling external snap rings or inte rnal snap rings,
they must be positioned so that sharp edge faces against the
direction from which a force is applied. See the figure left side.

• When insert ing spring pins, their splits must face the direction
from which a force is applied. See the figure left side.

• To prevent dam age to the hydraulic s ystem, use only sp ecified
fluid or equivalent.

(1) Grease
(2) Force
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement

G GENERAL

(A) External Snap Ring
(B) Internal Snap Ring

W10109040

G-2

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS
AND WIRING

To ensure safety and prevent damage to the machine and
surrounding equipm ent, heed the following pr ecautions in handling
electrical parts and wiring.

• Check electrical wiring for damage and loosened
connection every year. To this end, educate the customer to
do his or her own check and at the s ame time recommend
the dealer to perform periodic check for a fee.

• Do not attempt to modify or remodel any electrical parts and
wiring.

• When removing th e ba tter y cab le s, dis co nn ect t he n egat ive
cable first. When in stalling the b attery cables, c onnect the
positive cable first.

(1) Negative Terminal (2) Positive Terminal

W10111140

[1] WIRING

• Securely t ighten wiring terminals.

(1) Correct

(Securely Tighten)

(2) Incorrect

(Loosening Leads to Faulty Contact)

W10112160

• Do not let wiring contact dangerous part.

(1) Wiring (Correct)
(2) Wiring (Incorrect)

(3) Dangerous Part
(4) Dangerous Part

• Securely insert grommet.

(1) Grommet (A) Correct

(B) Incorrect

W10113130

W10113880

G-3

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

• Securely clamp, being careful not to damage wiring.

(1) Clamp

• Wind Clamp Spirally

(2) Wire Harness

(3) Clamp
(4) Welding Dent

W10114580

• Clamp wiring so that there is no twist, unnecessary sag, or
excessive tension, except for movable part, where sag be
required.

(1) Wiring
(2) Clamp

(A) Correct
(B) Incorrect

W10115870

• In installing a part, take care not to get wiring caught by it.

(1) Wiring (A) Incorrect

W10116700

• After installing wiring, check protection of terminals and clamped
condition of wiring, only connect battery.

(1) Cover

• Securely Install Cover
W10117350

G-4

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

[2] BATTERY

G GENERAL

• Take care not to confuse positive and negative terminal posts.

• When removing b attery cables, disconnect negative cable first.
When installing battery cables, check for polarity and connect
positive cable first.

• Do not install a ny battery with capacity other than is specified
(Ah).

• After connecting cables to battery terminal posts, apply high
temperature grease to them a nd sec urely in stall t erminal covers
on them.

• Do not allow dirt and dust to collect on battery.

CAUTION

• Take care not to let battery liquid spill on your skin and
clothes. If contaminated, wash it off with water immediately.

• Before recharging the battery, remove it from the machine.

• Before recharging, remove cell caps.

• Do recharging in a well- ventilated place where there is no
open flame nearby, as hydrogen gas and oxygen are formed.

W10118160

[3] FUSE

[4] CONNECTOR

• Use fuses with specified capacity.
Neither too large or small capacity fuse is acceptable.

• Never use steel or copper wire in place of fuse.

• Do not install working light, radio set, etc. on machine which is not
provided with reserve power supply.

• Do not install accessories if fuse capacity of reserve power
supply is exceeded.

(1) Fuse (2) Slow Blow Fuse

W10120920

• For connector with lock, push lock to separate.

(A) Push

W10122110

• In separating connectors, do not pull wire harnesses.

• Hold connector bodies to separate.

(A) Correct (B) Incorrect

W10122720

G-5

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

• Use sandpaper to remove rust from terminals.

• Repair deformed terminal. Make certain there is no terminal
being exposed or displaced.

(1) Exposed Terminal
(2) Deformed Terminal

(3) Sandpaper
(4) Rust

W10123460

• Make certain that there is no female connector being too open.

(A) Correct (B) Incorrect

W10124300

• Make certain plastic cover is large enough to cover whole
connector.

(1) Cover (A) C orrect

[5] HANDLING OF CIRCUIT TESTER

• Use tester correctly following manual provided with tester.

• Check for polarity and range .

(B) Incorrect

W10125190

W10126840

G-6

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

4. LUBRICANTS, FUEL AND COOLANT

G GENERAL

Place

1 Fuel tank

Cooling system
(ROPS Type)

2

Cooling system
(CABIN Type)

Engine

3

crankcase
(with filter)

Transmission

4

case

5 Front axle case

Place No. of greasing point Capacity Type of grease

Front axle
support

Top link 2
T op link bracket

(if equipped)

6

Lift rod 1
Lift cylinder 4
Battery terminal 2
Throttle cable Oiling Engine oil

* KUBOTA original transmission hydraulic fluid.

L3130 L3430 L3830

10.6 U.S.gals

6.0 L

6.3 U.S.qts

5.3 Imp.qts

–

5.7 L

6.0 U.S.qts

5.0 Imp.qts

42 L

11.1 U.S.gals

9.2 Imp.gals

2 (with draft control)

Capacity

40 L

8.8 Imp.gals

6.5 L

6.9 U.S.qts

5.7 Imp.qts

Greasing

2

7.5 L

7.9 U.S.qts

6.6 Imp.qts

8.7 L

9.2 U.S.qts

7.7 Imp.qts

6.7 L

7.1 U.S.qts

5.9 Imp.qts

43 L

11.4 U.S.gals

9.5 Imp.gals

Lubricants, fuel and coolant

No. 2-D diesel fuel
No. 1-D diesel fuel if temperature is
below −10 °C (14 °F)

Fresh clean water with anti-freeze

Engine oil : API service
classification CD, CE or CF
Above 25 °C : SAE30,
(77 °F) 10W-30 or 10W-40
0 to 25 °C : SAE20,
(32 to 77 °F) 10W-30 or 10W-40
Below 0 °C : SAE1 0W,
(32 °F) 10W-30 or 10W-40

KUBOTA UDT or SUPER UDT
fluid*

KUBOTA UDT or SUPER UDT
fluid* or SAE80, 90 gear oil

Until grease
overflows

Moderate
amount

Multipurpose
type grease

G-7

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Place

L4630 L5030

40 L

1 Fuel tank

10.6 U.S.gals

8.8 Imp.gals

Cooling system
(ROPS Type)

7.5 L

7.9 U.S.qts

6.6 Imp.qts

2

Cooling system
(CABIN Type)

8.7 L

9.2 U.S.qts

7.7 Imp.qts

Engine

3

crankcase
(with filter)

Transmission

4

case

43 L

11.4 U.S.gals

9.5 Imp.gals

6.5 L

5 Front axle case

6.9 U.S.qts

5.7 Imp.qts

Place No. of greasing point Capacity Type of grease

Front axle case
support

Front axle
support

Top link 2
T op link bracket

6

(if equipped)

2 (with draft control)

Lift rod 1
Lift cylinder 4
Battery terminal 2
Throttle cable Oiling Engine oil

* KUBOTA original transmission hydraulic fluid.

Capacity

8.2 L

8.7 U.S.qts

7.2 Imp.qts

Greasing

2

2

43 L

11.4 U.S.gals

9.5 Imp.gals

8.0 L

8.5 U.S.qts

7.0 Imp.qts

9.2 L

9.7 U.S.qts

8.1 Imp.qts

45 L

11.9 U.S.gals

9.9 Imp.gals

6.0 L

6.3 U.S.qts

5.3 Imp.qts

Lubricants, fuel and coolant

No. 2-D diesel fuel
No. 1-D diesel fuel if temperature is
below −10 °C (14 °F)

Fresh clean water with anti-freeze

Engine oil : API service
classification CD, CE or CF
Above 25 °C : SAE30,
(77 °F) 10W-30 or 10W-40
0 to 25 °C : SAE20,
(32 to 77 °F) 10W-30 or 10W-40
Below 0 °C : SAE10W,
(32 °F) 10W-30 or 10W-40

KUBOT A UDT or SUPER UDT
fluid*

KUBOT A UDT or SUPER UDT
fluid* or SAE80, 90 gear oil

Until grease
overflows

Multipurpose
type grease

Moderate
amount

G-8

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

■ NOTE
Engine Oil

• Oil used in th e engine should ha ve an Am erican Petroleum Institut e (API) ser vice cl assificati on and Prop er SAE
Engine OIl according to the ambient temperatures as shown above.

• With the emission control now in effect, the CF-4 and CG-4 lubricating oils have been developed for use of a low­fulfur fuel on on-r oad veh icle eng ines. When an off-or ad ve hicl e engin e runs on a high- sulfur fuel, i t is ad visable
to employ the CF, CD or CE lubricating oil with a high total base number . If the CF-4 or CG-4 lubricating oil is

used with a high-sulfur fuel, change the lubricating oil at shorter intervals.

• Lubricating oil recommended when a low-sulfur or high-sulfur fuel is employed.

Fuel
Lubricating

Low sulfur High sulfur Remarks

oil class

CF ❍❍TBN ≥ 10
CF-4 ❍ X
CG-4 ❍ X

❍ : Recommendable X : Not recommendable

W1035555

G-9

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

5. TIGHTENING TORQUES

Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be

tightened according to tables below.

[1] GENERAL USE SCREWS, BOLTS AND NUTS

Indication on top of

bolt

Material of bolt SS400, S20C S43C, S48C

Material of opponent

part

Unit
Diameter

M6

(6 mm, 0.24 in.)

M8

(8 mm, 0.31 in.)

M10

(10 mm, 0.39 in.)

M12

(12 mm, 0.47 in.)

M14

(14 mm, 0.55 in.)

M16

(16 mm, 0.63 in.)

M18

(18 mm, 0.71 in.)

M20

(20 mm, 0.79 in.)

No-grade or 4T 7T 9T

Ordinariness Aluminum Ordinariness Aluminum Ordinariness

N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs

7.85

0.80

5.79

7.85

0.80

5.79

9.81

1.00

to

9.31

17.7
to

20.5

39.3
to

45.1

62.8
to

72.5

108

to

125
167

to

191
246

to

284
334

to

392

to

0.95

1.8
to

2.1

4.0
to

4.6

6.4
to

7.4

11.0
to

12.8

17.0
to

19.5

25.0
to

29.0

34.0
to

40.0

to

6.87

13.1
to

15.1

29.0
to

33.2

46.3
to

53.5

79.6
to

92.5

123

to

141
181

to

209
246

to

289

to

to

to

8.82

0.90

6.50

16.7

19.6

31.4

34.3

1.7

12.3

to

to

2.0

3.2

to

3.5

–––

–––

–––

–––

–––

to

14.4

23.2

to

to

25.3

to

11.2

23.6
to

27.4

48.1
to

55.8

77.5
to

90.2

124

to

147
197

to

225
275

to

318
368

to

431

to

1.15

2.4
to

2.8

4.9
to

5.7

7.9
to

9.2

12.6
to

15.0

20.0
to

23.0

28.0
to

32.5

37.5
to

44.0

7.24
to

8.31

17.4
to

20.2

35.5
to

41.2

57.2
to

66.5

91.2
to

108
145

to

166
203

to

235
272

to

318

7.85

0.80
to

0.90

1.8
to

2.1

4.0
to

4.5

6.4
to

7.4

5.79
to

6.50

13.1
to

15.1

29.0
to

32.5

46.3
to

53.5

to

8.82

17.7
to

20.5

39.3
to

44.1

62.8
to

72.5

–––

–––

–––

–––

12.3
to

14.2

29.5
to

34.3

60.9
to

70.6

103

to

117
167

to

196
260

to

304
344

to

402
491

to

568

SCr435,

SCM435

1.25
to

1.45

3.0
to

3.5

6.2
to

7.2

10.5
to

12.0

17.0
to

20.0

26.5
to

31.0

35.0
to

41.0

50.0
to

58.0

W10345420

9.05
to

10.4

21.7
to

25.3

44.9
to

52.0

76.0
to

86.7

123

to

144
192

to

224
254

to

296
362

to

419

G-10

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

6. MAINTENANCE

G GENERAL

Period

No.

Item

1 Brake Adjust ★✩✩✩✩✩ G-18
2 Engine oil Change ★✩✩✩✩✩ G-15
3 Engine oil filter Replace ★✩ ✩ G-15
4 Hydraulic oil filter Replace ★✩ ✩ G-16
5 Transmission fluid Change ★✩G-17
6 Front axle case oil Change ★✩G-18
7 Engine start system Check ✩✩✩✩✩✩✩✩✩✩ G-20, 21
8 Wheel bolt torque Check ✩✩✩✩✩✩✩✩✩✩ G-21
9 Greasing – ✩✩✩✩✩✩✩✩✩✩ G-19

10 Battery condition Check ✩✩✩✩✩*5 G-25

Air cleaner

11

element

[Double type]
12 Clutch Adjust ✩✩✩✩✩ G-24
13 Parking brake (cable)

14 Fuel filter element
15 Fan belt Adjust ✩✩✩✩✩ G-23
16 Fuel line
17 Transmission oil filter [HST] Replace ✩✩ G-16
18 HST oil line [HST]

19 Radiator hose and clamp

20 Power steering oil line
21 Toe-in Adjust ✩✩ G-28

22 Front axle pivot Adjust ✩ G-31
23 Engine valve clearance Adjust ✩ *4 1-S27
24 Cooling system Flush ✩ G-33
25 Coolant Change ✩ G-33
26 Fuel system Bleed G-34
27 Clutch housing water Drain G-35
28 Fuse Replace G-36
29 Light bulb Replace G-37

Primary
element

Secondary
element

Clean ✩✩✩✩✩*1 G-22
Replace *2 G-32

Replace G-32

Adjust ✩✩✩✩✩ G-27
Replace G-27
Clean ✩✩✩✩✩ G-23
Replace ✩ G-31

Check ✩✩✩✩✩ G-24
Replace G-32

Check ✩✩ G-29
Replace
Check ✩✩ G-27
Replace G-32
Check ✩✩ G-29
Replace G-32

50 100 150 200 250 300 350 400 450 500

Indicatio n on hour meter

Important

*3 G-32

Reference

page

• The jobs indicated by ★ must be done after the first 50 hours of operation.

• *1 : Air cleaner should be cleaned more often in dusty conditions than in normal conditions.

• *2 : Every year or every 6 times of cleaning.

• *3 : Replace only if necessary.

• *4 : Consult your local KUBOTA distributor for this service.

• *5 : When the battery is used for less than 100 hours per year, check the battery condition by reading the indication annually.

• The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission
regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to
the above instruction. Please see the Warranty Statement in detail.

W10357690

G-11

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

Period

No.

Item

1Brake Adjust ✩✩✩ G-18
2 Engine oil Change ✩✩✩ G-15
3 Engine oil filter Replace ✩✩ G-15
4 Hydraulic oil filter Replace ✩✩ G-16
5 Transmission fluid Change ✩ G-17
6 Front axle case oil Change ✩ G-18
7 Engine start system Check ✩✩✩✩✩✩ G-20, 21
8 Wheel bolt torque Check ✩✩✩✩✩✩ G-21
9 Greasing – ✩✩✩✩✩✩ G-19

10 Battery condition Check ✩✩✩ *5 G-25

Air cleaner

11

element

[Double type]
12 Clutch Adjust ✩✩✩ G-24
13 Parking brake (cable)

14 Fuel filter element
15 Fan belt Adjust ✩✩✩ G-23
16 Fuel line
17 Transmission oil filter [HST] Replace
18 HST oil line [HST]

19 Radiator hose and clamp

20 Power steering oil line
21 Toe-in Adjust ✩✩ G-28

22 Front axle pivot Adjust ✩ G-31
23 Engine valve clearance Adjust ✩ *4 1-S27
24 Cooling system Flush ✩ G-33
25 Coolant Change ✩ G-33
26 Fuel system Bleed
27 Clutch housing water Drain G-35
28 Fuse Rep lace G-36
29 Light bulb Replace G-37

Primary
element

Secondary
element

Clean ✩✩✩ *1 G-22
Replace ✩ *2 G-22

Replace ✩ G-32

Adjust ✩✩✩ G-27
Replace ✩ G-27
Clean ✩✩✩ G-23
Replace ✩ G-31

Check ✩✩✩ G-24
Replace ✩ *3 G-32

Check ✩✩ G-29
Replace ✩ G-32
Check ✩✩ G-27
Replace ✩ G-32
Check ✩✩ G-29
Replace ✩ G-32

550 600 650 700 750 800 1 year 2 years

Indication on hour mete r After purchase

Important

✩✩ G-16

Service as

required

Reference

page

G-34

• The jobs indicated by ★ must be done after the first 50 hours of operation.

• *1 : Air cleaner should be cleaned more often in dusty conditions than in normal conditions.

• *2 : Every year or every 6 times of cleaning.

• *3 : Replace only if necessary.

• *4 : Consult your local KUBOTA distributor for this service.

• *5 : When the battery is used for less than 100 hours per year, check the battery condition by reading the indication annually.

• The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA nonroad emission
regulation. As the engine owner, you are responsible for the performance of the requi red maintenance on the en gine according t o
the above instruction. Please see the Warranty Statement in detail.

W10511390

G-12

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

(Only the Check Points Different from Those for Tractors with CABIN)

Period

No.

Item

Clogging of air conditioner

1

condenser screen
2 Tension of air conditioner drive belt Adjust ✩ G-29
3 Clogging of inner air filter Clean ✩ G-30
4 Clogging of fresh air filter Clean ✩ G-30

Clogging of air conditioner
5

condenser
6 Air conditioner pipes and hoses Check G-32
7 CABIN isolation cushion Check G-32
8 Lubricating points Check
9 Washer liquid Check G-37

10 Amount of refrigerant (gas) Check G-38

Clean Daily –

Check ✩ G-31

50 100 150 200 250 300 350 400 450 500

Indicatio n on hour meter

Service as required

Important

Reference

page

G-37

W11154790

(Only the Check Points Different from Those for Tractors with CABIN)

Period

No.

Item

Clogging of air conditioner
1

condenser screen
2 Tension of air conditioner drive belt Adjust G-29
3 Clogging of inner air filter Clean G-30
4 Clogging of fresh air filter Clean G-30

Clogging of air conditioner
5

condenser
6 Air conditioner pipes and hoses Check ✩ G-32
7 CABIN isolation cushion Check ✩ G-32
8 Lubricating points Check
9 Washer liquid Check G-37

10 Amount of refrigerant (gas) Check G-38

Clean Daily –

Check G-31

550 600 650 700 750 800 1 year 2 years

Indication on hour meter After purchase

Service as required

Important

Reference

page

G-37

W10606470

G-13

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

7. CHECK AND MAINTENANCE

CAUTION

• Be sure to check and service the tractor on a flat place with engine shut off, the parking brake on and chock
the wheels.

[1] DAILY CHECK

To prevent trouble fro m occurring, it i s important to k now the condition o f the tractor. Chec k the following i tems

before starting.

Checking

• Check areas where previous trouble was experienced.

• Walk around the tractor.

1. Check the tire pressure, and check for wear and damage.

2. Check for oil and water leak.

3. Check the engine oil level.

4. Check the transmission fluid level.

5. Check the coolant level.

6. Check the condition of ROPS attaching hardware.

7. Check and clean the radiator screen, grill and oil cooler. (HST only)

8. Check and clean the air condenser screen. (CABIN only)

9. Check the screws and nuts of tires are tight.

10.Check the number plate.

11.Care of danger, warning and caution labels.

12.Clean around the exhaust manifold and the muffler of the engine.

13.Check the fuel level.

14.Check the dust indicator.

• While sitting in the operator’s seat.

1. Check the brake pedals and clutch pedal.

2. Check the parking brake.

3. Check the steering wheel.

• Turning the key switch.

1. Check the performance of the easy checker lights.

2. Check the lights, turn signal lights, hazard lights and other light equipment. Clean if necessary.

3. Check the performance of the meters and gauges.

• Starting the engine.

1. Check to see that the lights on the easy checker go off.

2. Check the color of the exhaust gas.

3. Check the brakes for proper operation.

G-14

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

■

KiSC issued 02, 2007 A

[2] CHECK POINTS OF INITIAL 50 HOURS

Changing Engine Oil

CAUTION

• Before changing oil, be sure to stop the engine.

• Allow engine to cool down sufficiently, oil can be hot and
can burn.

1. Start and warm up the engine for approx. 5 minutes.

2. Place an oil pan underneath the engine.

3. To drain the used oil, remove the both drain plugs (1) at the
bottom of the engine and drain the oil completely.

4. Screw in the both drain plugs (1).

5. Fill new oil up to upper line on the dipstick (2).

IMPORTANT

• When using an oil of different manufacture or viscosity from
the previous one, remove all of the old oil.

• Never mix two different types of oil.

• Use the proper SAE Engine Oil according to ambient
temperatures.

• Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page
G-7, 8.)

Engine oil capacity
(with filter)

L3130
L3430

L3830

L4630
L5030

G GENERAL

5.7 L

6.0 U.S.qts

5.0 Imp.qts

6.7 L

7.1 U.S.qts

5.9 Imp.qts

8.2 L

8.7 U.S.qts

7.2 Imp.qts

(1) Drain Plug
(2) Dipstick
(3) Oil Inlet

(A) L3130, L3430, L4630, L5030
(B) L3830
(C) Oil level is acceptable within this

range.

W10145330

Replacing Engine Oil Filter Cartridge

CAUTION

• Be sure to stop the engine before changing oil filter
cartridge.

• Allow engine to cool down sufficiently, oil can be hot and
can burn.

1. Remove the oil filter cartridge with the filter wrench.

2. Apply a slight coat of oil onto the new cartridge gasket.

3. To install the new cartridge, screw it in by hand. Over tightening
may cause deformation of rubber gasket.

4. After the new cartridge has been replaced, the engine oil
normally decrease a li ttle . Thus see that the eng ine oil does not
leak through the s eal and be sure to read the oil l evel on the
dipstick. Then, replenish the engine oil up to the specified level.

IMPORTANT

• To prevent serious damage to the engine, replacement
element must be highly efficient. Use only a KUBOTA
genuine filter or its equivalent.

(1) Engine Oil Filter Cartridge

W10148920

G-15

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Replacing Hydraulic Oil Filter / Replacing Transmission Oil
Filter [HST Type]

CAUTION

• Be sure to stop the engine before changing the oil filter
cartridge.

• Allow engine to cool down sufficiently, oil can be hot and
can burn.

1. Remove the dr ain plugs at the bott om of the transmis sion case
drain the oil completely into the oil pan.

2. After draining reinstall the drain plugs.

3. Remove the oil filter.

4. Put a film of clean transmission oil on the rubber seal of the new
filter.

5. [Hydraulic oil filter]
Quickly tighten th e filter until it contacts the mounting surface,
then tighten it by hand an additional 1/2 turn only.
[Transmission oil filter]
Quickly tighten th e filter until it contacts the mounting surface,
then with a filter wrench, tighten it an additional 1 turn only.

6. After the new fil ters have been re placed, f ill the t ransmission oil
up to the upper notch on the dipstick.

7. After running the engine for a few minutes, stop the engine a nd
check the oil level again, add oil to the prescribed level.

8. Make sure that the transmission fluid does not leak past the seal
on the filter.

IMPORTANT

• To prevent serious damage to the hydraulic system, use
only a KUBOTA genuine filter.

(1) Drain Plugs
(2) Hydraulic Oil Filter
(3) Transmission Oil Filter [HST Type]
(4) Dipstick
(5) Oil Inlet

(A) Oil level is acceptable within this

range.

W1064569

G-16

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Changing Transmission Fluid

CAUTION

• Be sure to stop the engine checking and changing the
transmission fluid.

• Allow engine to cool down sufficiently, oil can be hot and
can burn.

1. Place an oil pan under the tractor.

2. Remove the drain plugs (1) at the bottom of the transmission
case.

3. Drain the transmission fluid.

4. After draining, screw in the drain plugs.

5. Fill new oil from filling port after removing the filling plug (2) up to
the upper line of the dipstick (3).

6. After running the engine for a few minutes, stop it and check the
oil level again, if low, add oil prescribed level.

IMPORTANT

• Use only multi-grade transmission oil. Use of other oils may
damage the transmission or hydraulic system.
Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page
G-7, 8.)

• Never work the tractor immediately after changing the
transmission oil. Keeping the engine at medium speed for a
few minutes to prevents damage to the transmission.

• Do not mix different blands oil together.

42 L

11.1 U.S.gals

9.2 Imp.gals
43 L

11.4 U.S.gals

9.5 Imp.gals
45 L

11.9 U.S.gals

9.9 Imp.gals

Transmission fluid
capacity

L3130, L3430

L3830, L4630

L5030

(1) Drain Plug
(2) Filling Plug
(3) Dipstick

(A) Oil level is acceptable within this

range.

W1068655

G-17

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Changi ng Front Axle C a se Oil

CAUTION

• Be sure to stop the engine before changing the front axle
case oil.

• Allow engine to cool down sufficiently, oil can be hot and
can burn.

1. Remove the right and left drain plugs (3) and filling plug (2) at the
front axle case and drain the oil completely.

2. After draining, reinstall the drain plugs (3).

3. Remove the right and left check plugs (1).

4. Fill new oil from filling port with specified amount of oil.
Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page
G-7, 8.)

5. Reinstall the filling plug (2) and check plug (1).

Front axle case oil
capacity

L3130
L3430
L3830
L4630

L5030

6.5 L

6.9 U.S.qts

5.7 Imp.qts

6.0 L

6.3 U.S.qts

5.3 Imp.qts

(1) Check Plug
(2) Filling Plug

(3) Drain Plug

W10300640

Adjuting Brake Pedal Free Travel

CAUTION

• Stop the engine and chock the wheels before checking
brake pedal.

1. Release the parking brake.

2. Slightly depr ess th e br ak e pe dal s and m eas ur e f ree tr avel (L) at
top of pedal stroke.

3. If the measurement is not within the factory specifications, loosen
the lock nut (1) and turn the turnbuckle (2) to adjust the rod length
within acceptable limits.

4. Retighten the lock nut (1) securely.
Keep the free travel in the right and left brake pedals equal.

Brake pedal free travel

“L”

(1) Lock Nut
(2) Turnbuckle

Factory spec.

L : Free T ravel

15 to 20 mm

0.59 to 0.79 in.

W10293350

G-18

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

[3] CHECK POINTS OF EVERY 50 HOURS

Greasing

1. Apply a grease to the following position as figures.

• Apply a small amount of multipurpose grease to the
following points every 50 hours.
If you operated the machine in extremely wet and muddy
conditions, lubricate grease fittings more often.

• When apply a grease to the front axle support, remove the
breather plug and apply a grease until grease overflows
from breather plug. After greasing reinstall the plug.

(1) Grease Fitting (Front Wheel Case

Support RH, LH)
(2) Grease Fitting (Front Axle Support)
(3) Breather Plug
(4) Grease Fitting (Lift Cylinder)
(5) Grease Fitting (Top Link)

G GENERAL

(6) Grease Fitting (Lifting Rod RH)
(7) Grease Fitting (Toplink Bracket)
(8) Battery Terminal

(A) L5030

W10308650

G-19

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Oiling

CAUTION

• Be sure to stop the engine and remove the key before oiling.

(1) Hand Throttle Cable (2) Foot Throttle Cable

(GST/Manual Transmission Type)

W1072984

Checking Engine Start System
(GST/Manual Transmission Type)

CAUTION

• Do not allow anyone near the tractor whil e testing.

• If the tractor does not pass the test, do not operate the
tractor.

■ Preparation before testing.

1. Place all control levers in the “NEUTRAL” position.

2. Set the parking brake and stop the engine.

■ Test 1 : Switch for the shuttle shift lever.

1. Sit on operator’s seat.

2. Shift the shuttle shift lever to the forward or reverse position.

3. Depress the clutch pedal fully.

4. Disengage the PTO clutch control lever.

5. Turn the key to “START” position.

6. The engine must not crank.

■ Test 2 : Switch for the PTO clutch control lever.

1. Sit on operator’s seat.

2. Engage the PTO clutch control lever.

3. Depress the clutch pedal fully.

4. Shift the range gear shift lever to the neutral position.

5. Turn the key to “START” position.

6. The engine must not crank.

■ If it cranks at the test 1 o r 2, adjust or repla ce the required
safety switch.

(1) Shuttle Shift Lever
(2) Clutch Pedal

(3) PTO Clutch Control Lever

W10312010

G-20

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Checking Engine Start System (HST Type)

1. Place all control levers in the “NEUTRAL” position.

2. Set the parking brake and stop the engine.

■ Test 1 : Switch for the speed control lever.

1. Sit on operator’s seat.

2. Depress the speed control pedal to the desired direction.

3. Depress the clutch pedal fully.

4. Disengage the PTO clutch control lever.

5. Turn the key to “START” position .

6. The engine must not crank.

■ Test 2 : Switch for the PTO clutch control lever.

1. Sit on operator’s seat.

2. Engage the PTO clutch control lever.

3. Depress the clutch pedal fully.

4. Place the speed control pedal to the neutral position.

5. Turn the key to “START” position .

6. The engine must not crank.

■ Test 3 : Switch for the clutch pedal.

1. Sit on operator’s seat.

2. Disengage the PTO clutch control lever.

3. Place the speed control pedal to the neutral position.

4. Release the clutch pedal.

5. Turn the key to “START” position .

6. The engine must not crank.

■ If it cranks at the test 1, 2 or 3, adjust or replace the required
safety switch.

(1) Speed Control Pedal
(2) Clutch Pedal

(3) PTO Clutch Control Lever

W10739440

Checking Wheel Mounting Screws and Nuts Tightening Torque

CAUTION

• Never operate tractor with a loose rim, wheel, or axle.

1. Check wheel screws an d n uts r eg ula rly es pe ci ally wh en new. If
there are loosened, tighten as follows.

Front wheel mounting nuts

Tightening torque

Rear wheel mounting
screws and nuts

(1) Front Wheel Mounting Nut (2) Rear Wheel Mounting Screw and

Nut

137 N·m
14 kgf·m
100 ft-lbs

215 N·m
22 kgf·m
166 ft-lbs

W1030725

G-21

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

IMPORTANT■

KiSC issued 02, 2007 A

[4] CHECK POINTS OF EVERY 100 HOURS

Changing Engine Oil

1. See page G-15.

Adjusting Brake Pedal

1. See page G-18.

Cleaning Air Cleaner Primary Element

1. Remove the air cleaner cover and primary element.

2. Clean the primary element :

- When dry dus t adheres to the element, blow compressed ai r
from the inside turning the element. Pressure of compressed
air must be under 205 kPa (2.1 kgf/cm

- When car bon or o il adhere s to the element, soak the element
in detergent for 15 minutes then wash it several times in water,
rinse with clean water and dry it naturally. After element is fully
dried, inspect inside of the element with a light and check if it is
damaged or not.

3. Replace air cleaner primary element :
Once yearly or after every six times of cleaning, whichever
comes first.

2

, 30 psi).

G GENERAL

W10320350

W1075566

• Check to see if the evacuator valve is blocked with dust.

• The air cleaner uses a dry element, never apply oil.

• Do not run the engine with filter element removed.

• Be sure to refi t the cover with the arrow ↑ (on the rear of
cover) upright. I f the cover is improperly fit ted, evacuator
valve will not function and dust will adhere to the element.

• Do not touch the secondary element except in cases where
replacing is required.
See “Replacing Air Cleaner Sec ondary Element” in Every 1
Year section. (See page G-32.)

■ Evacuator Valve

Open the evacuator valve (4) once a week under ordinary

conditions or daily when used in a dusty place to get rid of large
particles of dust and dirt.

(1) Secondary (Safety) Element
(2) Primary Element

(3) Cover
(4) Evacuator Valve

W1076669

G-22

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

Cleanin g Fu el Filter

This job should not be done in the field, but in a clean place.

1. Close the fuel filter coc k (1).

2. Unscrew the screw ring and rem ove the fuel filter bowl (2), and
rinse the inside with kerosene.

3. Take out the filter element (4) and dip it in the kerosene to rinse.

4. After cleaning, reas semble the fuel filter, keeping out dus t and
dirt.

5. Bleed the fuel system. (See page G-34.)

• If dust and dirt enters the fuel system the fuel pump and
injection nozzles are subject to premature wear. To prevent
this, be sure to clean the fuel filter and element bowl
periodically.

(1) Fuel Cock
(2) Fuel Filter Bowl
(3) O-ring

(4) Filter Element
(5) Spring
(6) Screw Ring

A : Close

W1078193

Adjusting Fan Belt Tension

CAUTION

• Be sure to stop the engine before checking fan belt tension.

1. Stop the engine and remove the key.

2. Apply moderate thumb pressure to belt between pulleys.

3. If tension is incorrec t, loosen the alternator mo unting bolts and
using a lever placed between the alternator and the engine block,
pull the alternator out until the deflection of the belt falls within the
factory specifications.

4. Replace fan belt if it is damaged.

A deflection of between 7

Fan belt tension Factory spec.

(1) Alternator Mounting Bolt A : Check the belt tension

B : To Tighten

to 9 mm (0.28 to 0.34 in.)
when the belt is pressed
in the middle of the span.

W10326270

G-23

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Checking Fuel Line

CAUTION

• Stop the engine when attempting the check and change
prescribed below.

• Remember to check t he fuel line periodically. The fuel line
is subject to wear and aging, fuel may leak out onto the
running engine, causing a fire.

1. Check to see that all line and hose clamp are tight and not
damaged.

2. If hoses and clamps are found worn or damaged, replace or
repair them at once.

3. The fuel lin e is m ade of rubber and a ges r eg ar dles s of peri od of
service. Replace the fuel pipe together with the clamp every two
years and securely tighten.

4. However if the fuel pipe and clamp are found damaged or
deteriorated earlier than two years, then change or remedy.

5. After the fuel line and cl amp have been cha nged, bleed the fuel
system.

IMPORTANT

• When the fuel line is disconnected for change, close both
ends of the fuel line with a piece of clean cloth or paper to
prevent dust and dirt from entering. Entrance of dust and
dirt causes malfunction of the fuel injection pump. In
addition, particular care must be take n not to admit dust and
dirt into the fuel pump.

(1) Fuel Hose (2) Clamp

W10342570

Adjusting Clutch Pedal Free Travel

CAUTION

• When checking, park the tractor on flat ground, apply the
parking brake, stop the engine and remove the key.

1. Slightly depres s th e c lut ch p edal a nd mea su re free tr avel “L” at
top of clutch pedal.

2. If the measurement is not within the factory specifications, loosen
the lock nut (2), remove the clevis pin (3) adjust the length of rod
(1) within acceptable limits.

3. Retighten the lock nut (2) and split the cotter pin.

Clutch pedal free travel
“L” on top of clutch
pedal

(1) Clutch pedal Rod
(2) Lock Nut
(3) Clevis Pin

Factory spec.

L : Free Travel

20 to 30 mm

0.78 to 1.18 in.

W1032993

G-24

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Checking Battery Condition

To avoid the possibility of battery explosion:
For the refillable type battery, follow the instructions below.

• Do not use or charge the refillable type battery if the fluid
level is below the LOWER (lower limit level) mark.
Otherwise, the battery component parts may prematurely
deteriorate, which ma y shorten the batte ry’s service life or
cause an explosion. Check the fluid level regularly and add
distilled water as required so that the fluid level is between
the UPPER and LOWER levels.

CAUTION

• Never remove the vent plugs while the engine is running.

• Keep electrolyte away fr om eyes, h and s and clothe s. If you
are spattered with it, wash it away completely with water
immediately and get medical attention.

• Wear eye protection and rubber gloves when working
around battery.

NOTE

• The factory-installed battery is of non-refillable type. If the
indicator turns white, do not charge the battery but replace
it with new one.

1. Mishandling the battery shortens the service life and adds to
maintenance costs.

2. The original battery is mai ntenance free type battery, but need
some servicing.
If the battery is weak, the engine is difficult to start and the lights
be dim. It is important check the battery periodically.

3. Check the battery condition by reading the indicator.
State of indicator display.
Green: Specify gravity of electrolyte and quality of electrolyte are
both in good condition.
Black: Need charging battery.
White: Need charging battery.

(1) Battery (2) Indicator

W1095602

G-25

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

■ Battery Charging

CAUTION

• When the battery is being activated, hydrogen and oxygen
gases in the battery are extremely explosive. Keep open
sparks and flames away from the battery at all times,
especially when charging the battery.

• When charging battery, remove battery vent plugs.

• When disconnecting the cable from the battery, start with
the negative terminal first.
When connecting the cable to the battery, start with the
positive terminal first.

• Never check battery charge by placing a metal object across
the posts.
Use a voltmeter or hydrometer.

1. To slow charge the battery, connect the battery positive terminal
to the charger positive terminal and the negative to the negative,
then recharge in the standard fashion.

2. A boost charge is only for emergencies. It will partially charge the
battery at a high rate and in a short time.
When using a boost-charged battery, it is necessary to recharge
the battery as early as possible.
Failure to do this will shorten the battery’s service life.

3. The battery is charge d if the indicator display turns green fr om
black.

4. When exchanging an old battery into new one, use battery of
equal specification shown in table 1.

Table 1

Tractor

model
L3130

L3430
L3830

L4630
L5030

Battery

Type

75D26R 12 52 123 490 6.5

80D26R 12 55 133 582 6.5

Volt

(V)

Capacity
at 5 H.R.

(A.H.)

Reserve

Capacity

(min.)

Cold

Cranking

Amps

Normal

Charging

Rate (A)

■ Direction for Storage

1. When storing the tractor for long periods of time, remove the
battery from tractor, adjust the electrolyte to the proper level and
store in a dry place out of direct sunlight.

2. The battery self-discharges while it is stored.
Recharge it once every three months in hot se asons and once
every six months in cold seasons.

(1) Battery

W1033925

G-26

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Adjusting Parking Brake Lever

CAUTION

• Stop the engine and chock the wheels before checking
parking brake.

1. Raise the parking b rake lever (1) to the parking position while
counting the ratchet sound made by the parking brake lever (1).

2. If adjustment is nee ded, loosen the lock nut (2) and adjust the
parking brake cable (3) length with in acceptable limit.

3. Retighten the lock nut (2).

Proper parking brake
lever free travel

Factory spec.

2 notches
(Ratchet sound 2)

(1) Parking Brake Lever
(2) Release Button

[5] CHECK POINTS OF EVERY 200 HOURS

Replacing Engine Oil Filter Cartridge

1. See page G-15.

Replacing Hydraulic Oil Filter / Replacing Transmission Oil
Filter [HST Type]

1. See page G-16.

Checking Radiator Hose and Hose Clamp

Check to see if radiator hoses are properly fixed every 200 hours

of operation or six months, whichever comes first.

1. If hose clamps are loose or water leaks, tighten bands securely.

2. Replace hoses and tighten hose clamps securely, if radiator
hoses are swollen, hardened or cracked.
Replace hoses and hose clamps every 2 years or earlier if
checked and found that hoses are swollen, hardened or cracked.

■ Precaution at Overheating

Take the following a ctions in the even t the coolant temper ature

be nearly or more than the boiling point, what is called
“Overheating”.

1. Stop the machine operation in a sa fe pla ce and keep the eng ine
unloaded idling.

2. Don’t stop the engine suddenly, but stop it after about 5 minutes
of unloaded idling.

3. Keep yourself well away from the machine for further 10 minutes
or while the steam blown out.

4. Checking that there gets no danger such as b urn, get rid of the
causes of overheating according to the manual, see
“Troubleshooting” section, and then, start again the engine.

(1) Radiator Hose (2) Clamp

(3) Parking Brake Cable
(4) Lock Nut

W1073621

W10344210

W10344720

W10347370

G-27

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

Adjusting Toe-in

1. Park the tractor on the flat place.

2. Inflate the tires to the specified pressure.

3. Turn steering wheel so front wheels are in the straight ahead
position.

4. Lower the implement, lock the parking brake and stop the engine.

5. Measure distance between tire beads at front of tire, hub height.

6. Measure distance between tire beads at rear of tire, hub height.

7. Front distance should be 2 to 8 mm (0.079 to 0.315 in.) less than
rear distance.

8. If the measurement is not within the factory specifications, adjust
by changing the tie-rod length .

Toe-in (B - A) Factory spec.

2 to 8 mm

0.079 to 0.315 in.

■ Adjusting

1. Detach the snap ring (1).

2. Loosen the tie -rod nut (2) and t urn the tie-rod jo int (3) to adju st
the tie-rod length until the proper toe-in measurement is
obtained.

3. Retighten the tie-rod nut (2).

4. Attach the snap ring (1) of the tie-rod joint.

166.7 to 196.1 N·m

Tightening torque Tie-rod lock nut

17.0 to 20.0 kgf·m
123 to 145 ft-lbs

• A right and left tie-rod joint is adjusted to the same length.

(1) Snap Ring
(2) Tie-rod Nut
(3) Tie-rod Joint

(A) Wheel to Wheel Distance at front
(B) Wheel to Wheel Distance at rear
(C) Front

W1082751

G-28

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Checking HST Oil Line [HST Type] / Checking Power Steering
Line

1. Check to see that all lines and hose clamps are tight and not
damaged.

2. If hoses and clamps ar e found wo rn or dam aged, repl ace repai r
them at once.

(1) HST Oil Line
(2) Power Steering Pressure Hoses

(A) HST Type

W1085565

Adjusting Air Conditioner Belt Tension (Cabin Model)

CAUTION

• Be sure to stop the engine before checking air conditioner
belt tension.

1. Stop the engine and remove the key.

2. Apply 98 N (10 kgf, 22 lbs) pressure to the belt between the
pulleys.

3. If tension is incorrect, adjust the belt tension.

4. If belt is damaged, replace it.

A deflection of between

Air conditioner belt
tension

(1) Adjusting Bolt
(2) Nut

Factory spec.

A : Deflection

10 to 12 mm (0.39 to 0.47
in.) when the belt is
pressed in the middle of
the span

W1019789

G-29

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

Cleaning Inner Air Filter (Cabin Model)

1. Remove the i nner fil ter, a nd bl ow air fr om th e direc tion oppo site
to the filter’s normal air flow.

(Reference)

• Detach and attach the push-rivet (2) as follows.

- Detaching procedure (A)

Push in the center rivet (a) and pull out the push-rivet assembly
(b).

- Attaching procedure (B)

Pull out the center rive t ( c), attac h th e pu sh-rivet assembly (d)
and push up the center-rivet (e).

(1) Inner Air Filter
(2) Push-rivet
(3) Center-rivet

a : Push in center-rivet
b : Pull out push-rivet assembly
c : Pull out center-rivet
d : Attach push-rivet assembly
e : Push up center-rivet

W1118812

Cleaning Air Filter (Cabin Model)

■ Fresh Air Filter

1. Remove the knob bolts (3) and pull out the fresh air filter (1).

2. Blow air from the opposite direction to the filter’s normal air flow.

• If the filter is very dirty :
Dip the filter in lukewarm water with mild dish washing
detergent.
Move it up and down as well as left and right to loosen dirt.
Rinse the filter with clean water and let it air-dry.

• Do not use gasolin e, thinner or similar chemicals to clean
the filter as damage to the filter may occur.

• If may also cause an unpleasant odor in the CABIN when the
system is used next.

• Do not hit the filter. If the filter becomes deformed, dust may
enter into the air-conditioner, which may cause damage and
malfunction.

(1) Fresh Air Filter
(2) Cover
(3) Knob Bolt

A : Air Inlet Port
B : Air Conditioner Air Flow

W1019336

G-30

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

Checking Air Conditioner Condenser (Cabin Model)

1. Check the air conditioner condenser (1).

2. If dust and dirt, wash off all dir t and dus t from the c ondens er (1)
with a soft brush, use care not to damage or bend the fins.

(1) Air Conditioner Condenser

[6] CHECK POINTS OF EVERY 400 HOURS

Changing Transmission Fluid

1. See page G-17.

Changing Front Axle Case Oil

1. See page G-18.

Replacing Fuel Filter Element

1. See page G-23.

G GENERAL

W1019699

W10365120

W10365590

W1085936

[7] CHECK POINTS OF EVERY 600 HOURS

Adjust Front Axle Pivot

1. Loosen the lock nut ( 2), tighten the adjusting screw (1) all the
way, and then loosen the adjusting screw (1) by 1/6 turn.

2. Retighten the lock nut (2).

• If the axle pivot pin adjustment is not correct, front wheel
vibration can occur causing vibration in the steering wheel.

(Reference)

Tightening torque

(1) Adjusting Screw (2) Lock Nut

[8] CHECK POINTS OF EVERY 800 HOURS

Checking Valve Clearance

1. See page 1-S27.

Front axle adjusting screw

Lock nut

19.6 to 29.4 N·m

2.0 to 3.0 kgf·m

14.5 to 21.7 ft-lbs

98.1 to 147.1 N·m

10.0 to 15.0 kgf·m

72.3 to 108.5 ft-lbs

W1036668

W1036805

G-31

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

[9] CHECK POINTS OF EVERY 1 YEAR

Replacing Air Cleaner Primary Element and Secondary Element

1. Replace the both primary and secondary elements.
Refer to “Cleaning Air Cleaner Primar y Ele men t” . (See page
G-22.)

Checking Air Conditioner Pipe and Hose

1. Check to see that all lines and hose clamps are tight and not
damaged.

2. If hoses (1) and cl amps ar e found worn or damaged, rep lace or
repair them at once.

(1) Hose

Checking Cabin Isolation Cushion

1. Check the isolation cushion (1) for any breakage or fatigue.

2. Replace them if they have deteriorated.

(1) Isolation Cushion F : Front Side

G GENERAL

W1037077

W1021331

R : Rear Side

[10] CHECK POINTS OF EVERY 2 YEARS

Replacing Fuel Hose

1. Replace the fuel hoses and clamps, if necessary.
Refer to “Checking Fuel Line”. (See page G-24.)

Replacing Parking Brake Cable

1. Replace the cable.
Refer to “Adjusting Parking Brake Lever”. (See page G-27.)

Replacing HST Oil Line

1. Replace the hoses and clamps.
Refer to “Checking HST Oil Line and Power Steering Line”.
(See page G-29.)

Replacing Power Steering Hose

1. Replace the hoses and clamps.
Refer to “Checking HST Oil Line and Power Steering Line”.
(See page G-29.)

Replacing Radiator Hose (Water Pipes )

1. Replace the hoses and clamps.
Refer to “Checking Radiator Hose and Hose Clamp”. (See
page G-27.)

W1021413

W1037148

W1037203

W1037296

W1037361

W1037429

G-32

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Flushing Cooling System and Changing Coolant

CAUTION

• Do not remove the radiator cap when the engine is hot. Then
loosen cap slightly to the stop to relieve any excess
pressure before removing cap completely.

1. Stop the engine and let cool down.

2. To drain the coolant, open the radiator drain plug (3) and remove
the radiator cap (1). T he radiator cap (1) must be r emoved to
completely drain the coolant.

3. After all coolant is drained, close the drain plug (3).

4. Fill with clean water and cooling system cleaner.

5. Follow directions of the cleaner instruction.

6. After flushing, fill with clean water and anti-freeze until the coolant
level is just below the port. Install the radiator cap (1) securely.

7. Fill with coolant up to “FULL” mark on the recovery tank.

8. Start and operate the engine for few minutes.

9. Stop the engine and let cool. Check coolant level of recovery
tank (2) and add coolant if necessary.

IMPORTANT

• Do not start engine without coolant.

• Use clean, fresh water and anti-freeze to fill the radiator and
recovery tank.

• When the anti-freeze is mixed with water, the anti-freeze
mixing ratio must be less than 50 %.

• Securely tighten radiator cap. If the cap is loose or
improperly fitted, water may leak out and the engine could
overheat.

• Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page
G-7, 8.)

6.0 L

6.3 U.S.qts

5.3 Imp.qts

7.5 L

7.9 U.S.qts

6.6 Imp.qts

8.7 L

9.2 U.S.qts

7.7 Imp.qts

9.2 L

9.7 U.S.qts

8.1 Imp.qts

Coolant capacity (with
recovery tank)

L3130
L3430

L3830 (ROPS)
L4630 (ROPS)

L3830 (CABIN)
L4630 (CABIN)

L5030

(1) Radiator Cap
(2) Recovery Tank
(3) Drain Plug

G-33

A : FULL
B : LOW

W1037510

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

Flushing Cooling System and Changing Coolant (Continued)

■ Anti-Freeze

If coolant freezes, it can damage the cylinders and radiator. It is
necessary, if the ambient temperature falls below 0 °C (32 °F), to
remove coolant after operating or to add anti-freeze to it.

1. There are two types of anti-freeze available ; use the permanent

type (PT) for this engine.

2. Before adding anti-freeze for the first time, clean the radiator

interior by pouring fresh water and draining it a few times.

3. The procedure for mixing of water and anti-freeze differs

according to the make of the anti-freeze and the ambient

temperature, basically is should be referred to SAE J1034

standard, more specifically also to SAE J814c.

4. Mix the anti-freeze with water, and ten fill in to the radiator.

Vol % Anti-freeze

40 −24 −12 106 222
50 −37 −34 108 226

*At 760 mmHg pressure (atmospheric). A higher boiling points is

Freeze Point Boiling Point*

°C °F °C °F

obtained by using a radiator pressure cap which permits the
development of pressure within the cooling system.

[11] OTHERS

• The above data represent industry standards that
necessitate a minimum g lycol content in the concentrated
anti-freeze.

• When the coolant level drops due to evaporation, add water
only. In case of leakage, add ant i-freeze and water in the
specified mixing ratio.

• Anti-freeze abs or bs moisture. Keep unused an ti- f reeze in a
tightly sealed container.

• Do not use radiator cleaning agents when anti-freeze has
been added to the coolant. (Anti-freeze contains an anti­corrosive agent, which will react with the radiator cleaning
agent forming sludge which will affect the engine parts.)

W10385910

Bleeding Fuel System

Air must removed :

1. When the fuel filter or lines are removed.

2. When tank is completely empty.

3. After the tractor has not been used for a long period of time.
Bleeding procedure is as follows.

1. Fill the fuel tank with fuel, and open the fuel cock (1).

2. Open the air vent cock (2) on the fuel injection pump.

3. Start the engine and run for about 30 seconds, and then stop the
engine.

4. Close the air vent cock.

• Always close the air vent cock except for bleeding fuel lines.
Otherwise, engine runs irregularly or stalls frequently.

(1) Fuel Cock
(2) Air Vent Cock

A : Close
B : Open

W1039026

G-34

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

G GENERAL

Draining Clutch Housing Water

• The tractor is equipped with split pin plug (1) under the
clutch housing.

• After operating in rain, snow or tractor has been washed,
water may get into the clutch housing.

1. Check it by pushing in the split pin (1).

2. If water enters into the clutc h housing , remove the plug (1) and
drain the water, then reinstall the plug.

(1) Split Pin (Plug)

W1039199

G-35

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

Replacing Fuse

1. The tractor electri cal system is pro tected from potenti al dama ge
by fuses.
A blown fuse indicates that there is an overload or short
somewhere in the electrical system.

2. If any of the fuses should blow, replace with a new one of the
same capacity.

• Before replacing a blown fuse, determine why the fuse blew
and make any necessary repairs. Failure to follow this
procedure may result in serious damage to the tractor
electrical system. Refer to troubleshooting section of this
manual.
If any of them should blow, replace with a new one of the
same capacity.

■ Protected Circuit

Fuse No. Capacity (A) Protected circuit ROPS CABIN

1 25 Head lights ✩✩
2 20 Flasher ✩✩
320Hazard ✩✩
4 5 Panel ✩✩
5 7.5 Alternator ✩✩
6 5 Lamp relay ✩✩
7 7.5 Work light ✩ –
8 5 Brake lamp switch ✩ –
9 5 Key stop ✩✩

10 30 Starter relay ✩✩

11 7.5 Position lamp ✩ –
12 5 T/M controller 1 (GST Type) – ✩
13 10 Dome lamp – ✩
14 15 Aircon blower – ✩
15 10 Radio casette – ✩
16 10 Patrol lamp – –
17 10 T/M controller 2 (GST Type) – ✩
18 20 Cigar lighter – ✩
19 7.5 Aircon compressor – ✩
20 30 Wiper – ✩
21 15 Work light – ✩
22 30 Defogger – ✩

23

Slow blow

fuse

Check circuit against wrong
battery connection.

✩✩

(A) ROPS Model (B) CABIN Model

W1039315

G-36

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Replacing Light Bulb

1. Head lights and rear combination lights :
Take the bulb out of the light body and replace with a new one.

2. Other lights :
Detach the lens and replace the bulb.

Light

Head lights 45 W / 40 W
Tail light 10 W
Hazard and turn signal light (rear) 21 W
Hazard and turn signal light (front) 21 W
Side marker light 5 W
Room light – 10 W
Work light – 27 W
Instrument panel light 1.1 W
Brake stop light 21 W
Number plate light 10 W

ROPS CABIN

Capacity

Lubricating Points

(1) Door Hinge (2) Rear Window Hinge

W1039659

W1120093

Adding Washer Liquid

1. Add a proper amount of automobile washer liquid.

Tank capacity

(1) Washer Liquid Tank

2.0 L

0.53 U.S.gals

0.44 Imp.gals

W1120170

G-37

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Checking Refrigerant (Gas)

CAUTION

• Liquid contact with eyes or skin may cause frostbite.

• In the event of a leakage, wear safety goggles. Escaping
refrigerant can cause severe injuries to eyes.

• In contact with a flame, R134a refrigerant gives a toxic gas.

• Do not disconnect any part of the refrigeration circuit of the
air conditioning system.

A shortage of refrigerant impairs the air-conditioner performance.

Check the following points. If it is indicated that the amount of
refrigerant is extremely low, inspect and charge. (See page 10­S21.)

■ Checking Procedure

1. Run the air-conditioner in the following conditions.

-1

- Engine speed : About 1500 min

(rpm)

- Temperature control lever : Maximum cooling position

(leftmost)

- Fan switch : Highest blow (HI)

- Air-conditioner switch : ON

2. Look into the sig ht glass (1) to see if the refrigerant is flowing
through its circuit.

IMPORTANT

• Charge only with R134a not R12 refrigerant (gas).

(1) Sight Glass (A) Proper : Little or no air bubbles in

the refrigerant flow.

(B) Low : Lots of air bubbles in the

refrigerant flow (air bubbles or
foam passing continuously).

(C) Overfull or no refrigerant :

Colorless and transparent.

W1120282

G-38

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

8. SPECIAL TOOLS

[1] SPECIAL TOOLS FOR ENG INE

Special Use Puller Set

Code No.: 07916-09032
Application: Use exclusively for pulling out bearing, gears and other

Piston Ring Compressor

Code No.: 07909-32111
Application: Use exclusively for pushing in the piston with piston

G GENERAL

parts with ease.

W10240500

rings into the cylinder.

W10241000

Piston Ring Tool

Code No.: 07909-32121
Application: Use exclusively for removing or installing the piston ring

with ease.

W10241500

Diesel Engine Compression Tester

Code No.: 07909-30208 (Assembly) 07909-31251 (G)

07909-30934 (A to F) 07909-31271 (I)
07909-31211 (E and F) 07909 -3 128 1 (J)
07909-31231 (H)

Application: Use to measure diesel engine compression and

diagnostics of need for major overhaul.

(1) Gauge
(2) L Joint
(3) Adaptor A
(4) Adaptor B
(5) Adaptor C
(6) Adaptor E

(7) Adap tor F
(8) Adap tor G
(9) Adap tor H

(10) Adaptor I

(11) Adaptor J

W10242000

G-39

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Oil Pressure Tester

Code No.: 079 16- 32 032
Application: Use to measure lubricating oil pressure.

(1) Gauge
(2) Cable
(3) Threaded Joint
(4) Adaptor 1

(5) Adaptor 2
(6) Adaptor 3
(7) Adaptor 4
(8) Adaptor 5

Valve Seat Cutter

Code No.: 079 09- 33 102
Application: Use to reseat valves.
Angle: 0.785 rad (45°)

0.262 rad (15°)

Diameter: 28.6 mm (1.126 in.) 38.0 mm (1.496 in.)

31.6 mm (1.244 in.) 41.3 mm (1.626 in.)

35.0 mm (1.378 in.) 50.8 mm (2.000 in.)

W10243180

W10244580

Radiator Tester

Code No.: 079 09- 31 551
Application: Use to check of radiator ca p pressure, and leak s from

cooling system.

Remarks: Adapter (1) BANZAI Code No. RCT-2A-30S

W10245320

Connecting Rod Alignment Tool

Code No.: 079 09- 31 661
Application: Use to check the connecting rod alignment.
Applicable: Connecting rod big end I.D.
range 30 to 75 mm (1.18 to 2.95 in.) dia.

Connecting rod length
65 to 300 mm (2.56 to 11.81 in.)

W10245830

Nozzle Tester

Code No.: 079 09- 31 361
Application: Use to check the fuel injection pressure and spray

pattern of nozzle.

Measuring: 0 to 50 MPa

2

range (0 to 500 kgf/cm

, 0 to 7000 psi)

W10246530

G-40

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Plastigage

Code No.: 07909-30241
Application: Use to check the oil clearance between crankshaft and

bearing, etc.

Measuring: Green.... 0.025 to 0.076 mm (0.001 to 0.003 in.)

range Red ....... 0.051 to 0.152 mm (0.002 to 0.006 in.)

Blue....... 0.102 to 0.229 mm (0.004 to 0.009 in.)

W10247190

Red Check

Code No.: 07909-31371
Application: Use to check cracks on cylinder head, cyli nder block,

etc.

W10249090

Crankshaft Nut Socket 46

Code No.: 07916-30821
Application: Use exclusively for removing or installing the

crankshaft nut.

W10443610

Socket Wrench 46

Code No.: 07916-30901
Application: Use exclusively for removing or installing the

crankshaft nut.

W10444600

Auxiliary Socket For Fixing Crankshaft Sleeve

Code No.: 07916-32091
Application: Use to fix the crankshaft sleeve of the diesel engine.

W10771140

G-41

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

• The following special tools are not provided, so make them referring to the figure.
Valve Guide Replacing Tool

Application: Use to press out and press fit the valve guide.

A 20 mm dia. (0.79 in. dia.)
B 11.7 to 11.9 mm dia. (0.460 to 0.468 in. dia.)
C 6.5 to 6.6 mm dia. (0.256 to 0.259 in. dia.)
D 225 mm (8.86 in.)
E 70 mm (2.76 in.)
F 45 mm (1.77 in.)
G 25 mm (0.98 in.)
H 5 mm (0.197 in.)

I 6.7 to 7.0 mm dia. (0.263 to 0.275 in. dia.)

J 20 mm dia. (0.787 in. dia.)

K 12.5 to 12.8 mm dia. (0.492 to 0.504 in. dia.)

L 8.9 to 9.1 mm (0.350 to 358 in.)
C1 Chamfer 1.0 mm (0.039 in.)
C2 Chamfer 2.0 mm (0.079 in.)

C0.3 Chamfer 0.3 mm (0.012 in.)

Injection Pump Pressure Tester

Application: Use to check fuel tightness of injection pumps.

Pressure gauge full scale : More than 29.4 MPa (300 kgf/cm

A

psi)
B Copper gasket
C Flange (Material : Steel)
D Hex. nut 27 mm (1.06 in.) across the plat
E Injection pipe
FPF 1/2
G 5 mm (0 .2 0 in.)
H 17 mm dia. (0.67 in. dia.)

I 8 mm dia. (0.31 in. dia.)

J 1.0 mm (0.039 in.)

K 17 mm dia. (0.67 in. dia.)

L 6.10 to 6.20 mm dia. (0.2402 to 0.2441 in. dia.)
M 8 mm (0.31 i n .)
N 4 m m ( 0 .1 6 i n .)
O 11.97 to 11.99 mm dia. (0.4713 to 0.4721 in. dia.)
PPF 1/2
Q 23 mm (0.91 in.)
R 17 mm (0.67 in.)
S 4 mm (0.16 in.)
T 12.00 to 12.02 mm dia. (0.4724 to 0.4732 in. dia.)
U 100 mm (3.94 in.)
V M12 × P1.5

a Adhesive application

b Fillet welding on the enter circumference

G GENERAL

W10250170

2

, 4267

W10252400

G-42

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Bushing Replacing Tools

Application: Use to press out and to press fit the bushing.
(1) For small end bushing

A 162 mm (6.38 in.)
B 35 mm (1.38 in.)
C 27 mm (1.06 in.)
D 35 mm dia. (1.38 in. dia.)
E 27.90 to 27.95 mm dia. (1.098 to 1.100 in. dia.)
F 25.00 to 25.01 mm dia. (0.984 to 0.985 in. dia.)

(2) For idle gear bushing

A 175 mm (6.89 in.)
B 40 mm (1.57 in.)
C 38 mm (1.49 in.)
D 45 mm dia. (1.77 in. dia.)
E 41.90 to 41.95 mm dia. (1.650 to 1.652 in. dia.)
F 37.95 to 37.97 mm dia. (1.494 to 1.495 in. dia.)

W10255000

Flywheel Stopper

Application: Use to loosen and tighten the flywheel screw.

A 200 mm (7.87 in.)
B 20 mm (0.79 in.)
C 30 mm (1.18 in.)
D 8 mm (0.31 in.)
E 10 mm dia. (0.39 in. dia.)

W10259480

G-43

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Crankshaft Bearing 1 Replacing Tool

Application: Use to press out and press fit the crankshaft bearing 1.

1. Extracting tool (D1503, D1703, V2203)

A 135 mm (5.31 in.)
B 72 mm (2.83 in.)
C R40 mm (R1.57 in.)
D 10 mm (0.39 in.)
E 20 mm (0.79 in.)
F 20 mm dia. (0.79 in. dia.)
G 56.8 to 56.9 mm dia. (2.236 to 2.240 in. dia.)
H 51.8 to 51.9 mm dia. (2.039 to 2.043 in. dia.)

2. Inserting tool (D1503, D1703, V2203)

A 130 mm (5.12 in.)
B 72 mm (2.83 in.)
C R40 mm (R1.57 in.)
D 9 m m ( 0 .3 5 i n .)
E 4 mm (0.16 in.)
F 20 mm (0.79 in.)
G 20 mm dia. (0.79 in. dia.)
H 68 mm dia. (2.68 in. dia.)

I 51.8 to 51.9 mm dia. (2.039 to 2.043 in. dia.)

J 56.8 to 56.9 mm dia. (2.236 to 2.240 in. dia.)

1. Extracting tool (D1803, V2403)

A 135 mm (5.31 in.)
B 72 mm (2.83 in.)
C R40 mm (R1.57 in.)
D 10 mm (0.39 in.)
E 20 mm (0.79 in.)
F 20 mm dia. (0.79 in. dia.)
G 64.8 to 64.9 mm dia. (2.551 to 2.555 in. dia.)
H 59.8 to 59.9 mm dia. (2.354 to 2.358 in. dia.)

2. Inserting tool (D1803, V2403)

A 130 mm (5.12 in.)
B 72 mm (2.83 in.)
C R40 mm (R1.57 in.)
D 9 m m ( 0 .3 5 i n .)
E 4 mm (0.16 in.)
F 20 mm (0.79 in.)
G 20 mm dia. (0.79 in. dia.)
H 68 mm dia. (2.68 in. dia.)

I 59.8 to 59.9 mm dia. (2.354 to 2.358 in. dia.)

J 64.8 to 64.9 mm dia. (2.551 to 2.555 in. dia.)

W10261390

G-44

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

Balancer Metal Replacing Tool (for Removing)

Application: Use to remove the metal bearing.

G GENERAL

A 25 mm (0.98 in. dia.) L 41.934 to 41.950 mm dia. (1.6509 to 1.6516 in. dia.)

B 10 mm (0.39 in.) M 24.959 to 24.980 mm dia. (0.9826 to 0.9835 in. dia.)
C Chamfer 0.3 mm (0.01 in.) N 21.947 to 21.960 mm dia. (0.8641 to 0.8646 in. dia.)
D 0.52 rad (30 °) O 28 mm (1.10 in.)

E 46.950 to 46.975 mm dia. (1.8484 to 1.8494 in. dia.) P 29 mm (1.14 in.)

F 43.934 to 43.950 mm dia. (1.7297 to 1.7303 in. dia.) Q 5 mm (0.20 in.)
G 41 mm (1.61 in.) R 36 mm (1.42 in.)
H 32.5 mm (1.28 in.) S 195.25 to 195.75 mm (7.687 to 7.707 in.)

I 148.5 mm (5.85 in.) T 145 mm (5.71 in.)

J 46.50 to 46.75 mm dia. (1.831 to 1.841 in. dia.) U 384.75 to 385.25 mm (15.148 to 15.167 in.)

K 44.950 to 44.975 mm dia. (1.7697 to 1.7707 in. dia.)

G-45

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

Balancer Metal Replacing Tool (for Fitting)

Application: Use to press fit the metal bearing.

G GENERAL

A 0.52 rad (30 °) O 5 mm (0.20 in.)
B 10 mm (0.39 in.) P 3.3 to 3.7 mm (0.130 to 0.146 in.)
C C hamfer 0.3 mm (0.01 in.) Q 43 .934 to 43.950 mm dia. (1.7297 to 1.7303 in. dia.)
D 182 mm (7.16 in.) R 140 mm (5.51 in.)
E 140 mm (5.51in.) S 36 mm (1.42 in.)
F 35 mm dia. (1.38 in dia.) T 60 mm dia. (2.36 in. dia.)
G 60 mm dia. (2.36 in dia.) U 46 .950 to 46.975 mm dia. (1.8484 to 1.8494 in. dia.)
H 37 mm (1.46 in.) V 44.950 to 44.975 mm dia. (1.7697 to 1.7707 in. dia.)

I 21.947 to 21.960 mm dia. (0.8641 to 0.8646 in. dia.) W 41.934 to 41.950 mm dia. (1.6509 to 1.6516 in. dia.)

J 24.959 to 24.980 mm dia. (0.9826 to 0.9835 in. dia.) X 145 mm (5.71 in.)

K 8.8 to 9.2 mm (0.346 to 0.362 in.) Y 195.25 to 195.75 mm (7.687 to 7.707 in.)

L

25 mm dia. (0.98 in. dia.)

M

60 mm dia. (2.36 in. dia.)

N

46.950 to 46.975 mm dia. (1.8484 to 1.8494 in. dia.)

G-46

Z
a

29 mm (1.14 in.)
36 mm (1.42 in.)

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

[2] SPECIAL TOOLS FOR TRACTOR

Tie-rod End Lifter

Code No.: 07909-39051
Application: Use for removing the tie-rod end with ease.

Steering Wheel Puller

Code No.: 07916-51090
Application: Use for removing the steering wheel without damaging

G GENERAL

W10264720

the steering shaft.

W10265330

Injector CH3

Code No.: 07916-52501
Application: Use for injecting calcium chloride solution into, and

removing it from, rear and 4WD type front wheel tires.

W10265850

Clutch Center Tool (For B and L Series Tractors)

Application: The clutch center tool can be used for all B and L series

tractors with a diaphragm clutch by changing tip guides.
Center piece diameter is 20 mm (0.79 in.).

W10266370

Toe-in Gauge

Code No.: 07909-31681
Application: This allows easy measurement of toe-in for all machine

models.

W10266890

G-47

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Rear Axle Cover Puller

Code No.: 079 16- 51 041
Application: Use for removing a rear axle cover from rear axle.

W10732590

Relief Valve Pressure Tester

Code No.: 079 16- 50 045
Application: This allows easy measurement of relief set pressure.

(1) Gauge (07916-50322)
(2) Cable (07916-50331)
(3) Threaded Joint (07916-50401)
(4) Threaded Joint (07916-50341)
(5) Adaptor B (M18 × P1.5)

(07916-50361)

(6) Adaptor C (PS3/8) (07916-50371)
(7) Adaptor D (PT1/8) (07916-50381)
(8) Adaptor E (PS3/8) (07916-50392)
(9) Adaptor F (PF1/ 2) (07916-62601)

(10) Adaptor 58 (PT1/4) (07916-52391)

W10267410

Flow Meter

Code No.: 07916-52791 (Flow Meter)

07916-52651 (Hydraulic Test Hose)

Application: This allows easy testing of hydraulic system.

(1) Flow Meter (2) Hydraulic Test Hose

W10313180

Adaptor Set for Flow Meter

Code No.: 079 16- 54 031
Application: Use for testing the hydraulic system.

(1) Adaptor 52
(2) Adaptor 53
(3) Adaptor 54
(4) Adaptor 61
(5) Adaptor 62
(6) Adaptor 63
(7) Adaptor 64

(8) Adaptor 65
(9) Adaptor 66

(10) Adaptor 67

(11) Adaptor 68
(12) Adaptor 69
(13) Hydraulic Adaptor 1

W10313960

Power Steering Adapter

Code No.: 079 16- 54 021
Application: Use for measuring the relief valve sett ing pressure for

power steering.

W10442870

G-48

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

G GENERAL

Pinion Locking Tool

Code No.: 07916-52311
Application: Use for preventing the shaft from turning when

removing or tighten a bevel pinion shaft staking nut.

W10445520

Rear Axle Nut Wrench 71

Code No.: 07916-52531
Application: Use for removing and installing a rear axle nut.

W10446460

Relief Valve Setting Pressure Adaptor G

Code No.: 07916-52751
Application: This offers easy measurement of relief valve setting

pressure from the h ydraulic coupl er. This is availa ble
with the relief valve setting pressure tester.

• The following special tools are not provided, so make them referring to the figure.
Pinion Shaft Remover

Application: Use for removing a pinion shaft.

A 106 mm (4.17 in.)
B 350 mm (13.78 in.)
C 6 mm (0.24 in.)
D 90 mm (3.54 in.)
E 10 mm (0.39 in.)
F 40 mm (1.57 in.)
G 10 mm (0.39 in.)
H 35.6 mm (1.40 in.)

I 36 mm (1.42 in.)

J 41.6 mm (1.64 in.)

K Part code No. 3A201-4130 nut

L M27 × P1.5

M M10 × P1.25

W10623960

W10315930

G-49

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Hydraulic Arm Shaft Bushing Press-Fitting Tool

Application: Use for replacing the hyd raulic arm shaft bushing s in

the hydraulic cylinder body.

Right Left

54.7 to 54.9 mm

A

(2.1535 to 2.1614 in.)

24.5 to 25.5 mm

B

(0.9646 to 1.0039 in.)
C 40 mm (1.57 in.) 40 mm (1.57 in.)
D 32 mm (1.26 in.) 30 mm (1.18 in.)

49.7 to 49.9 mm

E

(1.9567 to 1.9646 in.)

F 70 mm dia. (2.76 in. dia.)
G 40 mm dia. (1.57 in. dia.)
H 50 mm (1.97 in.)

I 10 mm (0.39 in.)
a6.3 μm (250 μin.)
b6.3 μm (250 μin.)
c6.3 μm (250 μin.)
d6.3 μm (250 μin.)

49.7 to 49.9 mm
(1.9567 to 1.9646 in.)

21.5 to 22.5 mm
(0.8465 to 0.8858 in.)

44.7 to 44.9 mm
(1.7598 to 1.7677 in.)

W10316550

Draft Control Test Bar

Application: Use for checking the lift range and floating range of

hydraulic draft control.

A 1045 mm (41.14 in.)
B 1000 mm (29.37 in.)
C 20 mm dia. (0.79 in. dia.)
D 30 mm dia. (1.18 in. dia.)
E 90 mm (3.54 in.)
F 30 mm (1.18 in.)
G 30 mm (1.18 in.)
H 15 mm (0.59 in.)

I 20 mm dia. (0.79 in. dia.)

J Weld all around

K Weld all around

L 20 mm (0.79 in.)

W10625190

G-50

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

G GENERAL

• Special tools for R134a refrigerant air conditioning system introduced below are available from
NIPPONDENSO CO. LTD.

Air Conditioner Service Tool

Code No.: DENSO.CO. 95048-00061
Application: Use for charging, testing or discharging the air

conditioning system.

W1013507

(1) Manifold Gauge

Assembly

(2) Charging Hose

(Red : HI)

(3) Charging Hose

(Blue : LO)
(4) Charging Hose (Green)
(5) Can Tap Valve
(6) T Joint
(7) Quick Coupler (HI)
(8) Quick Coupler (LO )
(9) Se rvice Valve Packing

(10) Charging Hose Packing
(11) Tool Case

95048-10090

95948-10270

95948-10280
95948-10260
95048-10150
95048-10160
95048-10130
95048-10140
95906-10310
95906-10300
95949-10610

W1014733

Electric Gas Leak Tester

Code No.: DENSO.CO. 95146-00060
Application: Use for gas leak testing the air conditioning system.

W1013817

Vacuum Pump

Code No.: DENSO.CO. 95046-00040 (AC220V)

95046-00050 (AC240V)

Application: Use for evacuating the air conditioning system.

(1) Adaptor (For 134a) (2) Vacuum Pump

W1013764

G-51

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

Stopper Magnet Clutch (For A/C Compressor)

G GENERAL

Adaptor (For R134a)

Code No.: DENSO.CO. 95048-10190 (AC220V)

95048-10200 (AC240V)

Application: Use for evacuating the air conditioning system.

W1013888

Application: Use for loosen and tighten the magnet clutch mounting nut.

NOTE

• This special tool is not provided, so make it referring to the figure.

A 125 mm (4.92 in.) H 4.52 rad (120 °)
B 40 mm dia. (1.57 in. dia.) I R adius 27 mm (Radius 1.06 in.)
C Radius 33 mm (Radius 1.30 in.) J Radius 50 mm (Radius 1.97 in.)
D 16 mm (0.63 in.) K Weld all around
E 120 mm dia. (4.72 in. dia.) L 20 mm (0.78 in.)
F 12 mm dia. (0.47 in. dia.) M Radius 41 mm (Radius 1.61 in.)

G-52

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Valve Adaptor

Application: Use for measuring the system pressure of shuttle

valve.

A 24 mm (0.94 in.)
B 27.7 mm (1.09 in.)
C PS1/4
D 11 mm (0.43 in.)

E 15 mm (0.59 in.)

F 40 mm (1.57 in.)
G 60 mm (2.36 in.)
H 15 mm (0.59 in.)

I PT1/8

J 4 mm dia. (0.15 in. dia.)

C

1 Chamfer 1 mm (0.039 in.)

C

2 Chamfer 2 mm (0.079 in.)

W1039227

G-53

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

Pump Adaptor

G GENERAL

Application: Use for checking the main hydraulic pump.

• When using, attach with following parts.
O-ring : 04811-00180

• This adaptor is modified from Adaptor 61 of flowmeter adaptor set (see page G-48).

A 22 mm (0.872 in.) K 135 mm (5.31 in.)
B 11 mm (0.437 in.) L 7 mm dia. (0.28 in. dia.)
C 24 mm dia. (0.94 in. dia.) M 8.5 mm dia. (0.33 in. dia.)
D 18 mm dia. (0.71 in. dia.) N 37 mm (1.46 in.)
E 12 mm dia. (0.47 in. dia.) O 61.5 mm (2.42 in.)
F 1.7 to 1.9 mm (0.067 to 0.075 in.) P 24 mm (0.94 in.)
G 30 mm Round (1.18 in. Round) Q 27.7 mm (1.09 in.)
H 10 mm dia. (0.39 in. dia.) R 0.244 rad (14 °)

I G 3/8 S 40 mm (1.57 in.)

J 89 mm (3.50 in.) T 60 mm dia. (2.36 in. dia.)

(Reference)

• From size A to size R are same size as adaptor 61.

G-54

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

NOTE■

KiSC issued 02, 2007 A

9. TIRES

[1] TIRE PRESSURE

G GENERAL

WARNING

• Do not attempt to mount a tire on a rim. This should be done
by a qualified person with the proper equipment.

• Always maintain the correct tire pressure. Do not inflate
tires above the recommended pressure shown in the
operator’s manual.

• Do not use tires other than those approved by KUBOTA.

■ Inflation Pressure

Though the tire pr essure is factor y-set t o the pre scribed l evel, i t

naturally drops slowly in the course of time. Thus, check it everyday
and inflate as necessary.

Tire sizes Inflation Pressure

2

, 17 psi)

2

, 14 psi)

2

, 14 psi)

2

, 14 psi)

2

, 20 psi)

2

, 14 psi)

2

, 12 psi)

2

, 26 psi)

2

, 23 psi)

2

, 32 psi)

2

, 23 psi)

2

, 20 psi)

Rear

Front

11.2-24, 4PR 120 kPa (1.2 kgf/cm

12.4-24, 4PR 100 kPa (1.0 kgf/cm

13.6-24, 4PR 100 kPa (1.0 kgf/cm

13.6-26, 4PR 100 kPa (1.0 kgf/cm

13.6-28, 6PR 140 kPa (1.4 kgf/cm
355/80-D20, 4PR 100 kPa (1.0 kgf/cm
475/65-D20, 4PR 80 kPa (0.8 kgf/cm
7-16, 4PR 180 kPa (1.8 kgf/cm
8-16, 4PR 160 kPa (1.6 kgf/cm

9.5-16, 4PR 220 kPa (2.2 kgf/cm
212/80-D15, 4PR 160 kPa (1.6 kgf/cm
29 × 12.00-15, 4PR 140 kPa (1.4 kgf/cm

• Maintain the maximum pressure in f ront tires, if using a front
loader or when equipped with a full load of front weights.

(A) Insufficient
(B) Standard
(C) Excessive

(1) Ground

W10440050

G-55

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

[2] TREADS ADJUS TMENT

CAUTION

• When working on sl opes or working with trailer, set the wheel tread as wide as practic e for the job for
maximum stability.

• Support tractor securely on stands before removing a wheel.

• Do not work under any hydraulically supported devices. They can settle, suddenly leak down, or be
accidentally lowered. If necessary to work under tractor or any machine elements for servicing or
adjustment, securely support them with stands or suitable blocking beforehand.

• Never operate tractor with a loose rim, wheel, or axle.

(1) Front Wheels

Front axle is not adjustable

Models L3130, L3430

(1) Tread

Tire

Tread

7-16

Farm

1150 mm

(45.3 in.)

––

––

Models L3830, L4630

Tire

Tread

7-16

Farm

1150 mm

(45.3 in.)

8-16

Farm

1145 mm

(45.1 in.)

–

–

Models L5030

Tire – –

Tread – –

9.5-16
Farm

1135 mm

(44.7 in.)

212/80-D15

Turf

1180 mm
(46.5 in.)

212/80-D15

Turf

1180 mm
(46.5 in.)

–

–

–

–

29 × 12.00-

15 Tu rf

1270 mm

(50.0 in.)

29 × 12.00-

15 Tu rf

1210 mm

(47.6 in.)

W10527070

(2) Rear Wheels

Rear tread can be adjusted in 6 steps depending on the model.

To change the tread

1. Lift the rear tires off the ground.

2. Follow the illustrations below to get the desired tread width.

• If not attached as illustrated, transmission parts may be damaged.

• When re-fitting or adjusting a wheel, tighten the bolts to the following t orques then re check a fte r drivi ng
the tractor 200 m (200 yards) and thereafter according to service interval.

G-56

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

Models

G GENERAL

L3130, L3430

11.2-24 Farm

L3130, L3430

11.2-24 Farm

L3830, L4630

12.4-24 Farm
L3830, L4630

13.6-24 Farm
L3830, L4630

13.6-26 Farm
L5030

13.6-28 Farm

Models

1110 mm
(43.7 in.)

1110 mm
(43.7 in.)

1130 mm
(44.5 in.)

1140 mm
(44.9 in.)

1140 mm
(44.9 in.)

1125 mm
(44.3 in.)

1205 mm

(47.4 in.)

1205 mm

(47.4 in.)

1220 mm

(48.0 in.)

1210 mm

(47.6 in.)

1210 mm

(47.6 in.)

1225 mm

(48.2 in.)

1300 mm

(51.2 in.)

1300 mm

(51.2 in.)

1320 mm

(52.0 in.)

1310 mm

(51.6 in.)

1310 mm

(51.6 in.)

1325 mm

(52.2 in.)

1385 mm

(54.5 in.)

1385 mm

(54.5 in.)

1400 mm

(55.1 in.)

1410 mm

(55.5 in.)

1335 mm

(52.6 in.)

–

W10529090

L3130, L3430

355/80-D20 Turf

L3830, L4630

355/80-D20 Turf

L3830, L4630, L5030

475/65-D20 Turf

(1) Tread

1125 mm
(44.3 in.)

1140 mm

(44.9 in.)

–

1190 mm

(46.9 in.)

1210 mm

(47.6 in.)

1285 mm

(50.6 in.)

W10531370

G-57

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

G GENERAL

[3] TIRE LIQUID INJECTION

Auxiliary weights can be used to increase traction force for plowing in fields or clayey ground.

Another way is to inject water or another liquid, such as a calcium chloride solution in the tires. Water must not be
used in winter si nce it freezes at 0 °C (32 °F). The calcium chloride so lution will not fr eeze and mor eover, affords
higher effect than water since its specific gravity is higher than that of water by about 20 %. Below is an explanation
of calcium chloride solution injection.

• Do not fill the front tires with liquid.
Preparation of Calcium Chloride Solution

CAUTION

• When making a calcium chloride solution, do not pour water
over calcium chloride since this results in chemical reaction
which will cause high temperature. Instead add a small
amount of calcium chloride to the water at a time until the
desired solution is achieved.

Freezing temp.

−5 °C (23 °F) 12 kg (26.4 lbs)

−10 °C (14 °F) 21 kg (46.3 lbs)

−15 °C (5 °F) 28 kg (61.7 lbs)

−20 °C (−4 °F) 34 kg (75.0 lbs)

−25 °C (−13 °F) 40 kg (88.2 lbs)

−30 °C (−22 °F) 44 kg (97.0 lbs)

−35 °C (−31 °F) 49 kg (108 lbs)

−40 °C (−40 °F) 52 kg (114.6 lbs)

−45 °C (−49 °F) 56 kg (123.5 lbs)

−50 °C (−58 °F) 61 kg (134.5 lbs)

Weight of CaCl

(26.5 U.S.gals, 22.0 Imp.gals) of water

2 to be dissolved in 100 L

(a) Water (b) CaCl

2 (Calcium Chloride)

W10330830

Attaching Injector

1. Lift the rear tires off the ground.

2. Turn the tire so that the air valve is at the top.

3. Remove the air valve, and attach the injector. (Code No. 07916-

52501)

(1) Injector (2) Hose

W10333310

G-58

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

G GENERAL

Injection

CAUTION

• When a calcium chloride solution is used, cool it before
pouring it into the tire.

• Do not fill tires with water or solution more than 75 % of full
capacity (to the valve stem level).

The following four ways can be used to inject water or a calcium

chloride solution into tires.

1. Gravity injection (Fig. 1)

2. Pump injection (Fig. 2)

3. Pressure tank injection (Fig. 3)

4. Injection directly from tap (only when water is being used).

NOTE

• Once injection is completed, reset the air valve, and pump
air into the tire to the specified pressure.

Weight of Calcium Chloride Solution Filling 75 % of Full Capacity

of a Tire

Tire sizes 11.2-24 12.4-24 13.6-24
Slush free at −10 °C (14 °F)

Solid at −30 °C (−22 °F)
[Approx. 1 kg (2 lbs) CaCl
4 L (1 gals) of water]

Slush free at −24 °C (−11 °F)
Solid at −47 °C (−53 °F)
[Approx. 1.5 kg (3.5 lbs) CaCl
per 4 L (1 gals) of water]

Slush free at −47 °C (−53 °F)
Solid at −52 °C (−62 °F)
[Approx. 2.25 kg (5 lbs) CaCl
per 4 L (1 gals) of water]

2 per

2

2

103 kg

(227 lbs)

108 kg

(238 lbs)

115 kg

(254 lbs)

117 kg

(258 lbs)

125 kg

(276 lbs)

133 kg

(293 lbs)

153 kg

(337 lbs)

160 kg

(353 lbs)

170 kg

(375 lbs)

Tire sizes 13.6-26 13.6-28
Slush free at −10 °C (14 °F)

Solid at −30 °C (−22 °F)
[Approx. 1 kg (2 lbs) CaCl
4 L (1 gals) of water]

Slush free at −24 °C (−11 °F)
Solid at −47 °C (−53 °F)
[Approx. 1.5 kg (3.5 lbs) CaCl
per 4 L (1 gals) of water]

Slush free at −47 °C (−53 °F)
Solid at −52 °C (−62 °F)
[Approx. 2.25 kg (5 lbs) CaCl
per 4 L (1 gals) of water]

(1) Pump
(2) Pressure Tank
(3) Compressor
(4) Air
(5) Water

2 per

2

2

172 kg

(379 lbs)

181 kg

(399 lbs)

192 kg

(423 lbs)

(A) Correct : 75 %

Air Compresses Like A Cushion

(B) Incorrect : 100 % Full

Water Can Not Be Compressed

185 kg

(408 lbs)

200 kg

(441 lbs)

215 kg

(474 lbs)

W10334350

G-59

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

G GENERAL

Draining Water or Solution

1. Lift the rear tires off the ground.

2. Turn the tire so that the air valve is at the bottom.

3. Remove the air valve, and drain liquid (liquid can only be drained
to the level of the valve and liquid under that level remains
inside).

4. To drain liquid completely, use the injector, and direct
compressed air into the ti re to force out the liquid through the
injector’s vent.

(1) Injector
(2) Hose
(3) Vent

A: Compressed Air

W10451670

G-60

1 ENGINE

KiSC issued 02, 2007 A

MECHANISM

KiSC issued 02, 2007 A

CONTENTS

1. FEATURES....................................................................................................1-M1

2. FUEL SYSTEM ............................................................................................. 1-M2

3. LUBRICATING SYSTEM .............................................................................. 1-M3

4. COOLING SYSTEM......................................................................................1-M4

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

1. FEATURES

ENGINE

The engine model shown in the table below is
adopted in the L30 series tractor. These are 03-M series
engine.

Tractor Model Engine Model
L3130 D1503-MA-E
L3430 D1703-MA-E
L3830 D1803-MA-E
L4630 V2203-MA-E
L5030 V2403-MA-E

W1012642

1-M1

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

2. FUEL SYSTEM

ENGINE

(1) Fuel Overflow Pipe
(2) Injection Nozzle
(3) Injection Pipe

(4) Fuel Tank
(5) Injection Pump Air Vent Pipe
(6) Injection Pump

(7) Fuel Filter
(8) Fuel Feed Pump
(9) Fuel Filter Air Vent Pipe

a : Injected Fuel Flow
b : Returned Fuel Flow

The fuel system of this tractor is shown in the diagram above.
Fuel from the tank flows in the passage as shown by the arrows, and is injected from the nozzle via the fuel injection

pump. Overflow fuel returns to the tank.

The system includes filters and other concerns to protect it from entrance of air, water and dust.

While the engine is runnin g, fue l is fed i nto th e inj ec tio n pum p ( 6) by the fuel feed pump (8) afte r p assi ng thr ou gh
the fuel filter (7). The fuel camshaft actuates the injection pump and force-feeds fuel to the injection nozzle (2) through
the injection pipe (3). Fuel is then sprayed through the nozzle into the combustion chamber. The fuel discharged after
lubricating and cooling the injection nozzle is returned to the fuel tank (4) automatically through the overflow pipe (1).

1-M2

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

3. LUBRICATING SYSTEM

ENGINE

(1) R ocker Arm
(2) Oil Pressure Switch
(3) R ocker Arm Shaft
(4) Valve
(5) Gov ernor Shaft
(6) Idle Gear
(7) Crankshaft
(8) Oil Pump

(9) Oil Strainer
(10) Relief Valve
(11) Oil Filter Cartridge
(12) Push Rod
(13) Tappet
(14) Camshaft
(15) Pi ston
(16) C onnecting Rod
(17) Oil Cooler (L4630, L5030)

W1012968

A lubricating syst em consi sts of a n oil str ainer ( 9), oil pump (8) , rel ief valv e (10), oi l filt er cartr idge (11), oil cooler

(17) and oil pressure switch (2).

The oil pump s ucks lubrica ting oil from the oil p an through the oil st rainer an d the oil flow s down to the oil filt er,
cartridge where it is further filtered. Then the oil is forced to crankshaft (7), connecting rods (16), idle gear (6),
governor shaft (5), camshaft (14) and rocker arm shaft (3) to lubricate each part through the oil gallery.

1-M3

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

4. COOLING SYSTEM

ENGINE

(1) Radiator
(2) Cooling Fan
(3) Thermostat
(4) Water Pump
(5) Cylinder Head Water Jacket
(6) Cylinder Block Water Jacket

W1013006

The cooling system consists of a radiator (1), a centrifugal water pump (4), a cooling fan (2) and a thermostat (3).
The water is cool ed as it fl ows th rough the radiator co re, and the c ooling air through the r adia tor cor e by cooli ng

fan (2).

The water pump receives water from the radiator or from the cylinder head and force it into the cylinder block.

The thermostat (3) opens or closes according to the water temperature. When the water temperature is high, the
thermostat (3) opens to allow the water to flow from the cylinder head to the radiator (1). When the water temperature
is low, the thermostat close to flow the water only to the water pump (4).

The opening temperature of the thermostat (3) is approx. 71 °C (159.8 °F).

1-M4

SERVICING

KiSC issued 02, 2007 A

CONTENTS

1. TROUBLESHOOTING....................................................................................1-S1

2. SERVICING SPECIFICATIONS ....................................................................1-S4

3. TIGHTENING TORQUES ............................. ....... ...... ....... ...... ....... ...... ....... .1-S11

4. CHECKING, DISASSEMBLING AND SERVICING....................................1-S12

[1] SEPARATING ENGINE FROM TRACTOR .........................................1-S12

[2] ENGINE BODY ......................................................................................1-S26

(1) Checking and Adjusting ............................ ...... ....... ...........................1-S26

(2) Disassembling and Assembling........................................................1-S28

(3) Servicing ...........................................................................................1-S44

[3] LUBRICATING SYSTEM ..................................... ....... ...... ....... ...... ....... .1-S61

(1) Checking...........................................................................................1-S61

(2) Servicing ...........................................................................................1-S61

[4] COOLING SYSTEM...............................................................................1-S62

(1) Checking and Adjusting ............................ ...... ....... ...........................1-S62

[5] FUEL SYSTEM . ...... ....... ...... ....... ...... ...... ....... ....................................... .1-S64

(1) Checking and Adjusting ............................ ...... ....... ...........................1-S64

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

1. TROUBLESHOOTING

ENGINE

Symptom Probable Cause Solution

Engine Does Not
Start

Starter Does Not Run • Battery discharged

Engine Revolution Is
Not Smooth

Either White or Blue
Exhaust Gas Is
Observe

• No fuel

• Air in the fuel system

• Water in the fuel system

• Fuel pipe clogged

• Fuel filter clogged

• Excessively high viscosity of fuel or engine oil
at low temperature

• Fuel with low cetane number

• Fuel leak due to l oos e inj ect ion pip e ret a ini ng
nut

• Incorrect injec tio n timi ng

• Fuel camshaft worn

• Injection nozzle clogged

• Injection pump malfunctioning

• Seizure of crankshaft, camshaft, piston,
cylinder or bearing

• Compression leak from cylinder

• Improper valve timing

• Piston ring and cylinder worn

• Excessive valve clearance

• Starter malfunctioning

• Main switch malfunctioning

• Safety switches improperly adjusted or
defective

• Starter relay defective

• Wiring disconnected

• Electronic instrument panel connector
disconnected

• Fuel filter clogged or dirty

• Air cleaner clogged

• Fuel leak due to l oos e inj ect ion pip e ret a ini ng
nut

• Injection pump malfunctioning

• Incorrect nozzle injection pressure

• Injection nozzle stuck or clogged

• Governor malfunctioning

• Excessive engine oil

• Piston ring and cylinder worn or stuck

• Incorrect injec tio n timi ng

• Deficient compr es s ion

Replenish fuel
Bleed
Change fuel and
repair or replace fuel
system
Clean
Change
Use the spec ified fu el
or engine oil
Use the specified fuel
Tighten nut

Adjust
Replace
Clean
Repair or replace
Repair or replace

Replace head
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
Correct or replace
timing gear
Replace
Adjust

Charge
Repair or replace
Repair or replace
Repair or replace

Replace
Connect
Connect

Change
Clean or change
Tighten nut

Repair or replace
Adjust
Repair or replace
Repair

Reduce to the
specified level
Repair or replace
Adjust
Adjust top clearance

Reference
Page

G-7, 8

G-34

–

–

G-31

G-7, 8
G-7, 8

1-S29
1-S64

1-S37

–

1-S32

1-S37, S39,

S42

1-S29, S30

1-S36
1-S39

1-S27

G-25

9-S41

9-S33, 34

9-S35
9-S37

–
–

G-31
G-22

1-S29
1-S32

1-S65
1-S29

–

G-7, 8
1-S40

1-S64
1-S28

W1014322

1-S1

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE

Symptom Probable Cause S olution

Either Black or Dark
Gray Exhaust Gas Is
Observe

•Overload

• Low grade fuel used

• Fuel filter clogged

• Air cleaner clogged

• Deficient nozzle injection

Lessen the load
Use the specified fuel
Change
Clean or change
Repair or replace the
nozzle

Deficient Output • Incorrect injection timing

• Engine’s moving parts seem to be seizing

• Uneven fuel injection

Adjust
Repair or replace
Repair or replace the
injection pump

• Deficient nozzle injection

Repair or replace the
nozzle

• Compression leak

Replace head
gasket, tighten
cylinder head bolt,
glow plug and nozzle
holder

Excessive Lubricant
Oil Consumption

Fuel Mixed Into
Lubricant Oil

• Piston ring’s gap facing the same direction

• Oil ring worn or stuck

• Piston ring groove worn

• Valve stem and guide worn

• Oil leaking due to defective seals or packing

• Injection pump’s plunger worn

• Deficient nozzle injection

Shift ring gap
direction
Replace
Replace the piston
Replace
Replace

Replace pump
element or pump
Repair or replace the
nozzle

• Injection pump broken

Water Mixed Into
Lubricant Oil

• Head gasket defective

• Cylinder block or cylinder head flawed

Low Oil Pressure • Engine oil insufficient

• Oil straight clogged

• Relief valve stuck with dirt

• Relief valve spring weaken or broken

• Excessive oil clearance of crankshaft bearing

• Excessive oil clearance of crankpin bearing

• Excessive oil clearance of rocker arm

• Oil passage clogged

• Different type of oil

Replace
Replace

Replace
Replenish

Clean
Clean
Replace
Replace
Replace
Replace
Clean
Use the specified
type of oil

• Oil Pump defective

High Oil Pressure • Difference type oil

Repair or replace
Use the specified

type of oil

• Relief valve defective

Replace

Reference
Page

–

G-7, 8

G-31
G-22

1-S29

1-S64

–

1-S32
1-S29, S65
1-S29, S30

1-S40

1-S40
1-S39, S40

1-S31

–

1-S32
1-S29, S65

1-S32

1-S30

1-S30

G-7, 8

1-S38

–

–
1-S43
1-S43
1-S30

–
G-7, 8

1-S37
G-7, 8

–

W1014322

1-S2

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE

Symptom Probable Cause Solution

Engine Overheated • Engine oil insufficient

• Fan belt broken or elongated

• Coolant insufficient

• Radiator net and radiator fin clogged with

Replenish
Change or adjust
Replenish
Clean

dust

• Inside of radiator corroded

• Coolant flow route corroded

• Radiator cap defective

• Overload running

• Head gasket defectiv e

• Incorrect injec tio n timi ng

• Unsuitable fuel used

Clean or replace
Clean or replace
Replace
Loosen the load
Replace
Adjust
Use the specified fuel

Reference
Page

G-7, 8

G-23

–
–

–

G-27

1-S63

–
1-S30
1-S64
G-7, 8

W1014322

1-S3

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE

2. SERVICING SPECIFICATIONS

ENGINE BODY

Item Factory Specification Allowable Limit

Cylinder Head Surface Flatness – 0.05 mm / 500 mm

0.0020 in. /

19.69 in.

Compression Pressure
(When Cranking with Starting Motor)

3.53 to 4.02 MPa /
290 min

36 to 41 kgf/cm

290 min

512 to 583 psi /

290 min

−1

(rpm)

−1

(rpm)

−1

(rpm)

2

/

2.55 MPa /

290 min

26 kgf/cm

290 min

370 psi /

290 min

−1

(rpm)

−1

(rpm)

−1

(rpm)

2

/

Difference among Cylinders

–

Top Clearance 0.55 to 0.70 mm

0.0217 to 0.0276 in.

Valve Clearance (When Cold) 0.18 to 0.22 mm

0.0071 to 0.0087 in.

Valve Seat Width (Intake)

2.12 mm

0.0835 in.

Width (Exhau st)

2.12 mm

0.0835 in.

Valve Seat Angle (Intake)

1.047 rad
60 °

Angle (Exhaust)

0.785 rad
45 °

Valve Face Angle (Intake)

1.047 rad
60 °

Angle (Exhaust)

0.785 rad
45 °

Valve Stem to Valve Guide

Clearance

0.040 to 0.070 mm

0.00157 to 0.00276 in.

10 % or less

–

–

–

–

–

–

–

–

0.1 mm

0.0039 in.

Valve Stem

Valve Guide

Valve Recessing Protrusion

O.D.

I.D.

Recessing

1-S4

7.960 to 7.975 mm

0.31339 to 0.31398 in.

8.015 to 8.030 mm

0.31555 to 0.31614 in.

0.05 mm

0.0020 in.

0.15 mm

0.0059 in.

–

–

–

0.4 mm

0.0157 in.

W1013874

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE BODY (Continued)

Item Factory Specification Allowable Limit

Valve Timing (Intake Valve) D1503-M Open

0.14 rad (8 °)
before T.D.C.

ENGINE

–

Close

D1703-M

Open
D1803-M
V2203-M
V2403-M

Close

Valve Timing (Exhaust Valve) D1503-M Open

Close

D1703-M

Open
D1803-M
V2203-M
V2403-M

Close

Valve Spring Free Length

Setting Load /

Setting Length

0.35 rad (20 °)
after B.D.C.

0.21 rad (12 °)

before T.D.C.

0.63 rad (36 °)
after B.D.C.

1.05 rad (60 °)

before B.D.C.

0.21 rad (12 °)

after T.D.C.

1.00 rad (57 °)

before B.D.C.

0.21 rad (12 °)

after T.D.C.

41.7 to 42.2 mm

1.6417 to 1.6614 in.

117.6 N / 35.0 mm

12.0 kgf / 35.0 mm

26.4 lbs / 1.3780 in.

–

–

–

–

–

–

–

41.2 mm

1.6220 in.

100.0 N /35.0 mm

10.2 kgf /35.0 mm

22.5 lbs /1.3780 in.

Tilt

–

1.0 mm

0.039 in.

Rocker Arm Shaft to Rocker Arm

Rocker Arm Shaft

Clearance

O.D.

0.016 to 0.045 mm

0.00063 to 0.00177 in.

13.973 to 13.984 mm

0.1 mm

0.0039 in.
–

0.55012 to 0.55055 in.

Rocker Arm

I.D.

14.000 to 14.018 mm

–

0.55118 to 0.55189 in.

Push Rod Alignment – 0.25 mm

0.0098 in.

Tappet to Tappet Guide

Tappet

Clearance

O.D.

0.020 to 0.062 mm

0.00079 to 0.00244 in.

23.959 to 23.980 mm

0.07 mm

0.0028 in.
–

0.94327 to 0.94410 in.

Tappet Guide

I.D.

24.000 to 24.021 mm

–

0.94488 to 0.94571 in.

W1013874

1-S5

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE BODY (Continued)

Item Factory Specification Allowable Limit

Timing Gear
Crank Gear to Idle Gear

Backlash

0.0415 to 0.1122 mm

0.00163 to 0.00442 in.

ENGINE

0.15 mm

0.0059 in.

Idle Gear to Cam Gear

Idle Gear to Injection Pump Gear

Crank Gear to Oil Pump Gear

Idle Gear to Balancer Gear (Balancer
Model Only)

Backlash

Backlash

Backlash

Backlash
(Intake side)

Backlash
(Exhaust side)

Idle Gear Side Clearance 0.12 to 0.48 mm

Idle Gear Shaft to Idle Gear Bushing

Idle Gear Shaft

Clearance

O.D.

0.0415 to 0.1154 mm

0.00163 to 0.00454 in.

0.0415 to 0.1154 mm

0.00163 to 0.00454 in.

0.0415 to 0.1090 mm

0.00163 to 0.00429 in.

0.0350 to 0.1160 mm

0.00138 to 0.00457 in.

0.0350 to 0.1160 mm

0.00138 to 0.00457 in.

0.0047 to 0.0189 in.

0.025 to 0.066 mm

0.00098 to 0.00260 in.

37.959 to 37.975 mm

0.15 mm

0.0059 in.

0.15 mm

0.0059 in.

0.15 mm

0.0059 in.

0.15 mm

0.0059 in.

0.15 mm

0.0059 in.

0.9 mm

0.0354 in.

0.1 mm

0.0039 in.
–

1.49445 to 1.49508 in.

Idle Gear Bushing

I.D.

38.000 to 38.025 mm

–

1.49606 to 1.49704 in.

Camshaft Side Clearance 0.07 to 0.22 mm

0.0028 to 0.0087 in.

0.3 mm

0.0118 in.

Camshaft Alignment – 0.01 mm

0.0004 in.

Cam Height

(Intake / Exhaust)

Camshaft Journal to Cylinder Block Bore

Clearance

33.90 mm

1.3346 in.

0.050 to 0.091 mm

0.00197 to 0.00358 in.

33.85 mm

1.3327 in.

0.15 mm

0.0059 in.

Camshaft Journal

Cylinder Block Bore

Balancer Shaft (Balancer Model Only) Side Clearance 0.07 to 0.22 mm

Balancer Shaft Journal 1 to Balancer Shaft
Bearing 1 (Balancer Model Only)

Balancer Shaft Journal 1

Balancer Shaft Bearing 1

O.D.

I.D.

Clearance

O.D.

I.D.

1-S6

39.934 to 39.950 mm

1.57221 to 1.57284 in.

40.000 to 40.025 mm

1.57480 to 1.57579 in.

0.0028 to 0.0087 in.

0.030 to 0.111 mm

0.00118 to 0.00437 in.

43.934 to 43.950 mm

1.72968 to 1.73031 in.

43.980 to 44.045 mm

1.73149 to 1.73405 in.

–

–

0.3 mm

0.0118 in.

0.2 mm

0.0079 in.
–

–

W1013874

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE BODY (Continued)

Item Factory Specification Allowable Limit

Balancer Shaft Journal 2 to Balancer Shaft
Bearing 2 (Balancer Mod el On ly)

Clearance

0.030 to 0.111 mm

0.00118 to 0.00437 in.

ENGINE

0.2 mm

0.0079 in.

Balancer Shaft Journal 2

O.D.

41.934 to 41.950 mm

1.65094 to 1.65157 in.

Balancer Shaft Bearing 2

I.D.

41.980 to 42.045 mm

1.65275 to 1.65531 in.

Balancer Shaft Journal 3 to Balancer Shaft
Bearing 3 (Balancer Mod el On ly)

Balancer Shaft Journal 3

Clearance

O.D.

0.020 to 0.094 mm

0.00079 to 0.00370 in.

21.947 to 21.960 mm

0.86405 to 0.86456 in.

Balancer Shaft Bearing 3

I.D.

21.980 to 22.041 mm

0.86535 to 0.86775 in.

Piston Pin Bore I.D. 25.000 to 25.013 mm

0.98425 to 0.98476 in.

Second Ring to Ring Groove D1503-M

Clearance 0.093 to 0.120 mm

0.0037 to 0.0047 in.

D1703-M
D1803-M

0.093 to 0.128 mm

0.0037 to 0.0050 in.
V2203-M
V2403-M

Oil Ring to Ring Groove Clearance 0.020 to 0.060 mm

0.0008 to 0.0021 in.

Top Ring D1503-M

Ring Gap 0.20to 0.35 mm

0.0079 to 0.0138 in.

–

–

0.2 mm

0.0079 in.
–

–

25.05 mm

0.9862 in.

0.2 mm

0.0079 in.

0.2 mm

0.0079 in.

0.15 mm

0.0059 in.

1.25 mm

0.0492 in.

D1703-M
D1803-M

0.20 to 0.40 mm

0.0079 to 0.0157 in.

1.25 mm

0.0492 in.

V2203-M
V2403-M

Second Ring Ring Gap 0.30 to 0.45 mm

0.0118 to 0.0177 in.

Oil Ring Ring Gap 0.25 to 0.45 mm

0.0098 to 0.0177 in.

1.25 mm

0.0492 in.

1.25 mm

0.0492 in.

Connecting Rod Alignment – 0.05 mm

0.0020 in.

Piston Pin to Small End Bushing

Piston Pin

Clearance

O.D.

0.014 to 0.038 mm

0.00055 to 0.00150 in.

25.002 to 25.011 mm

0.15 mm

0.0059 in.
–

0.98433 to 0.98468 in.

Small End Bushing

I.D.

25.025 to 25.040 mm

–

0.98523 to 0.98582 in.

Crankshaft Alignment – 0.02 mm

0.00079 in.

W1013874

1-S7

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE BODY (Continued)

Item Factory Specification Allowable Limit

Crankshaft Journal to
Crankshaft Bearing 1

Oil Clearance

0.040 to 0.118 mm

0.00157 to 0.00465 in.

ENGINE

0.2 mm

0.0079 in.

Crankshaft Journal

Crankshaft Bearing 1

Crankshaft Journal to
Crankshaft Bearing 2

Crankshaft Journal

Crankshaft Bearing 2

D1503-M
D1703-M
V2203-M

D1803-M
V2403-M

D1503-M
D1703-M
V2203-M

D1803-M
V2403-M

D1503-M
D1703-M
V2203-M

D1803-M
V2403-M

D1503-M
D1703-M
V2203-M

O.D.

I.D.

Oil Clearance

O.D.

I.D.

51.921 to 51.940 mm

2.04413 to 2.04488 in.

59.921 to 59.940 mm

2.35909 to 2.35984 in.

51.980 to 52.039 mm

2.04646 to 2.04878 in.

59.980 to 60.039 mm

2.36142 to 2.36374 in.

0.040 to 0.104 mm

0.00157 to 0.00409 in.

51.921 to 51.940 mm

2.04413 to 2.04488 in.

59.921 to 59.940 mm

2.35909 to 2.35984 in.

51.980 to 52.025 mm

2.04646 to 2.04823 in.

–

–

–

–

0.2 mm

0.0079 in.
–

–

–

Crankpin to Crankpin Bearing

Crankpin

D1803-M
V2403-M

Oil Clearance

O.D.

59.980 to 60.025 mm

2.36142 to 2.36318 in.

0.025 to 0.087 mm

0.00098 to 0.00343 in.

46.959 to 46.975 mm

–

0.2 mm

0.0079 in.
–

1.84878 to 1.84941 in.

Crankpin Bearing

I.D.

47.000 to 47.046 mm

–

1.85039 to 1.85220 in.

Crankshaft D1503-M

D1703-M

Side Clearance 0.15 to 0.35 mm

0.0059 to 0.0138 in.

0.5 mm

0.0197 in.

V2203-M
D1803-M

V2403-M

0.15 to 0.31 mm

0.0059 to 0.0122 in.

0.5 mm

0.0197 in.

Crankshaft Sleeve Wear – 0.1 mm

0.0039 in.

W1029676

1-S8

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

ENGINE BODY (Continued)

Item Factory Specification Allowable Limit

Cylinder Bore
[Standard]

D1503-M

I.D.

83.000 to 83.022 mm

3.26772 to 3.26858 in.

ENGINE

+ 0.15 mm

+ 0.0059 in.

D1703-M
D1803-M

87.000 to 87.022 mm

3.42519 to 3.42606 in.
V2203-M
V2403-M

[Oversize]

D1503-M

I.D.

83.250 to 83.272 mm

3.27756 to 3.27843 in.

D1703-M
D1803-M

87.250 to 87.272 mm

3.43503 to 3.43590 in.
V2203-M
V2403-M

LUBRICATING SYSTEM

Engine Oil Pressure At Idle Speed

98 kPa or more

2

1.0 kgf/cm

or more

14 psi or more

At Rated Speed

294 to 441 kPa

3.0 to 4.5 kgf/cm
43 to 64 psi

Engine Oil Pressure Switch Working Pressure 49 kPa

0.5 kgf/cm

2

7 psi

Inner Rotor to Outer Rotor Clearance 0.03 to 0.14 mm

0.0012 to 0.0055 in.

Outer Rotor to Pump Body Clearance 0.11 to 0.19 mm

0.0043 to 0.0075 in.

Inner Rotor to Cover Clearance 0.105 to 0.150 mm

0.00413 to 0.00591 in.

+ 0.15 mm

+ 0.0059 in.

+ 0.15 mm

+ 0.0059 in.

+ 0.15 mm

+ 0.0059 in.

W1013874

49 kPa

0.5 kgf/cm

2

7 psi

245 kPa

2

2.5 kgf/cm

2

36 psi

–

0.2 mm

0.0079 in.

0.25 mm

0.0098 in.

0.2 mm

0.0079 in.

W1013973

1-S9

L3130 · L3430 · L3830 · L4630 · L5030, WSM

KiSC issued 02, 2007 A

COOLING SYSTEM

Item Factory Specification Allowable Limit

Fan Belt Tension 7.0 to 9.0 mm (0.28 to

0.35 in.) deflection at 98
N (10 kgf, 22 lbs) of

force

Thermostat Valve Opening

Temperature

69.5 to 72.5 °C

157.1 to 162.5 °F

(At Beginning)

ENGINE

–

–

Valve Opening
Temperature

85 °C

185 °F

–

(Opened
Completely)

Radiator Water Tightness No leaks at

–

137 kPa

1.4 kgf/cm

2

20 psi

Radiator Cap Pressure Falling

Time

10 seconds or more for

pressure falling

–

from 88 to 59 kPa

from 0.9 to 0.6 kgf/cm

2

from 13 to 9 psi

FUEL SYSTEM

Injection Pump Injection Timing 0.297 to 0.331 rad

–

(17 to 19 °) before

T.D.C.

Pump Element Fuel Tightness – 14.7 MPa

150 kgf/cm

2133 psi

Delivery Valve Fuel Tightness 10 seconds or more for

pressure falling

from 14.7 to 13.7 MPa

from 150 to 140 kgf/cm

from 2133 to 1990 psi

5 seconds for

pressure falling

from 14.7 to

2

13.7 MPa

from 150 to

140 kgf/cm

from 2133 to

1990 psi

Injection Nozzle Injection Pressure 13.73 to 14.71 MPa

140 to 150 kgf/cm

2

–

1991 to 2133 psi

Injection Nozzle Valve Seat Valve Seat

Tightness

When the pressure is

12.75 MPa

(130 kgf/cm

2

, 1849 psi),

–

the valve seat must be

fuel tightness.

W1013874

2

2

W1013973

1-S10

L3130 · L3430 · L3830 · L4630 · L5030, WSM

NOTE■

KiSC issued 02, 2007 A

3. TIGHTENING TORQUES

Tightening torques of screws, bolts and nuts on the table below are especially specified.

(For general use screws, bolts and nuts : See page G-10.)

Item N·m kgf·m ft-lbs

Lower frame mounting screw
ROPS lower connector mounti ng scre w
ROPS plate mounting screw (M14 × 40)
(M14 × 30)
Step mounting bolt and nut
Floor seat mounting bolt and nut
Compressor mounting screw
Muffler mounting screw
Cabin mounting bolt and nut
Joint bolt for main delivery pipe 1
Joint bolt for PTO delivery pipe
Joint bolt for oil cooler pipe
Engine and clutch housing mounting screw and nut
Engine and clutch housing mounting stud bolt
Joint bolt for power steering delivery pipe
Cap nut of power steering delivery pipe
Front axle frame mounting screw (7T)
(9T)
Alternator mounting screw (M10)
Tension adjusting screw (M8)
Clutch mounting screw

260 to 304
103 to 118
138 to 147
167 to 196
124 to 147
196 to 225

24.5 to 29.4

31.4 to 37.2
124 to 147

49 to 69
34 to 39
34 to 39

77.5 to 90.2

39.2 to 49.0

39.2 to 49.0

49.0 to 58.8

77.5 to 90.2

102.9 to 117.6

39.2 to 44.1

17.6 to 20.6

23.5 to 27.5

26.5 to 31.0

10.5 to 12.0

14.0 to 15.0

17.0 to 20.0

12.6 to 15.0

2.5 to 3.0

3.2 to 3.8

12.6 to 15.0

5.0 to 7.0

3.5 to 4.0

3.5 to 4.0

7.9 to 9.2

4.0 to 5.0

4.0 to 5.0

5.0 to 6.0

7.9 to 9.2

10.5 to 12.0

4.0 to 4.5

1.8 to 2.1

2.4 to 2.8

20 to 23

ENGINE

192 to 224

75.9 to 86.8
102 to 108
123 to 145

91.1 to 108
145 to 166

18.1 to 21.7

23.1 to 27.5

91.1 to 108

36.1 to 50.6

25.3 to 28.9

25.3 to 28.9

57.1 to 66.5

28.9 to 36.2

28.9 to 36.1

36.1 to 43.4

57.1 to 66.5

76.0 to 86.8

28.9 to 32.5

13.0 to 15.2

17.4 to 20.3

W1012736

Item Size x Pitch N·m kgf·m ft-lbs

* Cylinder head screws

Cylinder head cover screw
Injection pipe retaining nuts
Nozzle holder assembly
Overflow pipe assembly retaining nuts
Glow plugs

* Rocker arm bracket nut

Hi-idling body
Fan drive pulley mounting nut
Camshaft set bolt
Balancer shaft set bolt

* Connecting rod screws
* Flywheel screws
* Bearing case cover screws
* Main bearing case screws 2
* Main bearing case screws 1

M11 × 1.25

M6 × 1.0
M12 × 1.5
M20 × 2.0

–

M10 × 1.25

M8 × 1.25

–

–
M8 × 1.25
M8 × 1.25

M8 × 1.0

M12 × 1.25

M8 × 1.25

M10 × 1.25

M9 × 1.25

93.1 to 98.0

6.9 to 11.3

24.5 to 34.3

49.0 to 68.6

19.6 to 24.5

19.6 to 24.5

23.5 to 27.5

44.1 to 49.0

137.3 to 156.9

23.5 to 27.5

23.5 to 27.5

44.1 to 49.0

98.0 to 107.8

23.5 to 27.5

68.6 to 73.5

46.1 to 50.9

9.5 to 10.0

0.7 to 1.15

2.5 to 3.5

5.0 to 7.0

2.0 to 2.5

2.0 to 2.5

2.4 to 2.8

4.5 to 5.0

14.0 to 16.0

2.4 to 2.8

2.4 to 2.8

4.5 to 5.0

10.0 to 11.0

2.4 to 2.8

7.0 to 7.5

4.7 to 5.2

68.7 to 72.3

5.1 to 8.32

18.1 to 25.3

36.2 to 50.6

14.5 to 18.1

17.4 to 20.3

14.5 to 18.1

32.6 to 36.3

101.3 to 115.7

17.4 to 20.3

17.4 to 20.3

32.5 to 36.2

72.3 to 79.5

17.4 to 20.3

50.6 to 54.2

34.0 to 37.6

• For * marked screws, bolts and nuts on the table, apply engine oil to their threads and seats before
tightening.

• The letter “M” in Size x Pitch means that the screw, bolt or nut dimension stands for metric. The size is
the nominal outside diameter in mm of the threads. The pitch is the nominal distance in mm between two
threads.

W1013236

1-S11

L3130 · L3430 · L3830 · L4630 · L5030, WSM

IMPORTANT■

KiSC issued 02, 2007 A

4. CHECKING, DISASSEMBLING AND SERVICING

[1] SEPARATING ENGINE FROM TRACTOR

Draining Engine Oil

1. Start and warm up the engine for approx. 5 minutes.

2. Place an oil pan underneath the engine.

3. Remove the drain plugs (1) to drain oil.

4. Screw in the drain plugs (1).

(When refilling)

• Fill the engine oil up to the upper line on the dipstick (2).

• Never mix two different type of oil.

• Use the proper SAE Engine Oil according to ambient
temperature.
Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page
G-7, 8.)

5.7 L

6.0 U.S.qts

5.0 Imp.qts

6.7 L

7.1 U.S.qts

5.9 Imp.qts

8.2 L

8.7 U.S.qts

7.2 Imp.qts

Engine oil capacity

L3130
L3430

L3830

L4630
L5030

ENGINE

(1) Drain Plug
(2) Dipstick
(3) Oil Inlet Plug

(A) L3130, L3430, L4630, L5030
(B) L3830
(C) Oil level is acceptable within this

range.

W1013940

1-S12

L3130 · L3430 · L3830 · L4630 · L5030, WSM

■

KiSC issued 02, 2007 A

ENGINE

Draining the Transmission Fluid

1. Place oil pans underneath the transmission case.

2. Remove the drain plugs (1).

3. Drain the transmission fluid.

4. Reinstall the drain plugs (1).

(When refilling)

• Fill up from filling port after removing the filling plug (2) until
reaching the upper notch on the dipstick (3).

• After running the engine for few minutes, stop it and check the oil
level again, add the fluid to prescribed level if it is not correct
level.

42 L

11.1 U.S.gals

9.2 Imp.gals
43 L

11.4 U.S.gals

9.5 Imp.gals
45 L

11.9 U.S.gals

9.9 Imp.gals

Transmission fluid
capacity

L3130
L3430

L3830
L4630

L5030

IMPORTANT

• Use only KUBOTA SUPER UDT fluid. Use of other oils may
damage the transmission or hydraulic system.
Refer to “LUBRICANTS, FUEL AND COOLANT”. (See page
G-7, 8.)

• Do not mix different brands of fluid together.

(1) Drain Plugs
(2) Filling Plug
(3) Dipstick

(A) Oil level is acceptable within this

range.

W1014221

1-S13