Kubota WSM STV32, WSM STV36, WSM STV40, STV32, STV36 Workshop Manual

WORKSHOP MANUAL

KiSC issued 04, 2006 A

TRACTOR

STV32,STV36,STV40

TO THE READER

KiSC issued 04, 2006 A

This Workshop Manual has been prepared to provide servicing personn el with information on the mechanism,
service and main tenance of STV32, STV36 and STV40 . It is divided i nto three parts, "General ", "Mec hanism" an d
"Servicing".

B General

Information on the tracto r identifi catio n, the gene ral precau tions , mainten ance chec k list, c heck and ma intena nce
and special tools are described.

B 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 / Tractor Mechanism Workshop Manual (Code No. 97897-01872 / 97897-18200) for the one
which has not been described to this workshop manual.

B Servicing

Information on the troubleshooting, servicing specification lists, tightening torque, 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.

Due to covering many models of thi s manual, informa tion or picture b eing used ha ve not been specif ied as one
model.

August 2004

KUBOTA Corporation 2004

0000008021E

STV32 · STV36 · STV40, WSM SAFETY INSTRUCTIONS

KiSC issued 04, 2006 A

This symbol, the indu stry's "Saf ety Alert Symbol " is used throu ghout this ma nual and on labe ls on the mach ine
itself to warn of the possibility of per sonal injur y. Read these inst ructions care fully.It is essen tial that you read the
instructions and safety regulations before you attempt to repair or use this unit.

A Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

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

A Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

A Indicates that equipment or property damage could result if instructions are not followed.

A Gives helpful information.

BEFORE SERVICING AND REPAIRING
A Read all instruc tions and safety instructions in this

manual and on your machine safety decal s .

A Clean the work area and machine.
A Park the machine on a firm and level ground, and set

the parking brake.

A Lower the implement to the ground.
A Stop the engine, and remove the key
A Disconnect the battery negative cable
A Hang a "DO NOT OPERATE" tag in operator

station.

SAFETY STARTING
A Do not start the engine by shorting across starter

terminals or bypassing the safety start switch.

A Do not alter or remove any part of machine safety

system.

A Before starting the engine, make sure that all s hift

levers are in neutral positions or in disengaged
positions.

A Never start the engine while standing on ground.

Start the engine only from operator's seat.

0000000752E

0000000753E

0000000754E

1

STV32 · STV36 · STV40, WSM SAFETY INSTRUCTIONS

KiSC issued 04, 2006 A

SAFETY WORKING
A Do not work on the machine while under the

influence of alcohol, medication, or other substances
or while fatigued.

A Wear close fitting clothing and safety equipment

appropriate to the job.

A Use tools appropriate to the wo rk. Makeshift tools,

parts, and procedures are not recommended.

A When servicing is performed together by two or

more persons, take care to perform all work safely.

A Do not work under the machine that is supported

solely by a jack. Always support the machine by
safety stands.

A Do not touch the rotating or hot parts while the

engine is running.

A Never remove the radiator cap while the e ngine 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 loos en the cap to fi rst stop to re lieve
pressure be fore removing completely.

A Escaping fluid (fue l or hydraulic oil ) under pressure

can penetrate the skin causing serious injury.
Relieve pressure before disconnect ing hydraulic or
fuel lines. Tighten all connections before applying
pressure.

0000000755E

AVOID FIRES
A Fuel is extremely flammable and explosive under

certain condit ions. Do not smoke or al low fla mes or
sparks in your working area.

A To avoid sparks from an accidental short circuit,

always disconnect the battery negative cable first
and connect it last.

A Battery gas can explode. Keep sparks and open

flame away from the top of bat tery, esp ecially when
charging the battery.

A Make sure that no fuel has been spilled on the

engine.

0000000756E

2

STV32 · STV36 · STV40, WSM SAFETY INSTRUCTIONS

KiSC issued 04, 2006 A

VENTILATE WORK AREA
A If the engine must be running to do some work, make

sure the area is well ventilated. Never run the engine
in a closed area. The exhaust gas contains
poisonous carbon monoxide.

0000000757E

PREVENT ACID BURNS
A Sulfuric acid in battery elec trolyte is poiso nous. 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.

0000000758E

DISPOSE OF FLUIDS PROPERLY
A Do not pour fluids in to the ground, down a drain, or

into a stream, pond, or lake. Observe relevant
environmental protection regulations when
disposing of oil, fuel, cool ant, electrolyte and other
harmful waste.

0000000759E

PREPARE FOR EMERGENCIES
A Keep a first aid k it and fire ex tingu isher h andy at all

times.

A Keep emergency numbers for doctors, ambulance

service, hospital and fire department near your
telephone.

0000000760E

3

STV32 · STV36 · STV40, WSM SAFETY INSTRUCTIONS

KiSC issued 04, 2006 A

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.

0000006792E

4

STV32 · STV36 · STV40, WSM SAFETY INSTRUCTIONS

KiSC issued 04, 2006 A

0000006766E

5

STV32 · STV36 · STV40, WSM SAFETY INSTRUCTIONS

KiSC issued 04, 2006 A

0000000762E

6

STV32 · STV36 · STV40, WSM SPECIFICATIONS

KiSC issued 04, 2006 A

SPECIFICATIONS

Model STV32 STV36 STV40
PTO power 17.7 kW (24.1 HP)* 20.2 kW (27.5 HP)* 22.8 kW (31.0 HP)

Maker KUBOTA
Model D1503-M D1703-M D1803-M
Type E-TVCS, water-cooled, 4-cycle diesel
Number of cylinders 3
Bore and stroke 83 x 92.4 mm (3.27 x 3.64 in.) 87 x 92.4 mm (3.43 x 3.64 in.) 87 x 102.4 mm (3.43 x 4.03 in.)
Total displacement 1499 (91.5 cu.in.) 1647 (100.5 cu.in.) 1826 (111.4 cu.in.)

Engine

Capacities

Dimensions

Engine gross power 24.1 kW (32.3 HP)* 26.8 kW (35.9 HP)* 29.5 kW (39.5 HP)*
Rated revolution 2700 rpm
Maximum torque 99.2 (10.0 ) 108.3 (10.9 ) 120.7 (12.2 )
Battery 12 V, RC : 123 min, CCA : 490 A
Starting system Electric starting with cell starter 12 V, 1.4 kW
Lubricating system Forced Iubrication by trochoidal pump
Cooling system Pressurized radiator, forced circulation with water pump
Fuel Diesel fuel No. 2-D [above -10 (14 )], Diesel fuel No. 1-D [below 10 (14 )]
Fuel tank 29.5 L (7.79 U.S.gals, 6.49 Imp.gals)
Engine crankcase

(with filter)
Engine coolant 6.1 L (6.4 U.S.qts, 5.4 Imp.qts)
Transmission case 22 L (5.81 U.S.gals, 4.84 Imp.gals)
Front axle case 4.0 L (4.2 U.S.qts, 3.5 Imp.qts)

Tires

Front

Rear 9.5 - 22 13.6 - 16 9.5 - 22 13.6 - 16 9.5 - 22 13.6 - 16

Overall length
(with 3P)

Overall width
(min. tread)

Overall height
(with ROPS)

Wheel base 1610 mm (63.4 in.)
Minimum ground

clearance

Front 1030 mm (40.6 in.)

Tread

Rear

Farm:
6 - 12

1220 mm

(48.0 in.)

2350 mm

(92.5 in.)

235 mm

(9.3 in.)

950 mm

(37.4 in.)

1070 mm

(42.1 in.)

Turf:

24 x 8.5 - 14

1310 mm

(51.6 in.)

2340 mm

(92.1 in.)

225 mm

(18.9 in.)

965 mm

(38.0 in.)

1055 mm

(41.5 in.)

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

Farm:
6 - 12

2860 mm (112.6 in.)

1220 mm

(48.0 in.)

2350 mm

(92.5 in.)

235 mm

(9.3 in.)

950 mm

(37.4 in.)

1070 mm

(42.1 in.)

Turf:

24 x 8.5 - 14

1310 mm

(51.6 in.)

2340 mm

(92.1 in.)

225 mm

(18.9 in.)

965 mm

(38.0 in.)

1055 mm

(41.5 in.)

Farm:
6 - 12

1220 mm

(48.0 in.)

2350 mm

(92.5 in.)

235 mm

(9.3 in.)

950 mm

(37.4 in.)

1070 mm

(42.1 in.)

Turf:

24 x 8.5 - 14

1310 mm

(51.6 in.)

2340 mm

(92.1 in.)

225 mm

(18.9 in.)

965 mm

(38.0 in.)

1055 mm

(41.5 in.)

7

STV32 · STV36 · STV40, WSM SPECIFICATIONS

KiSC issued 04, 2006 A

Model STV32 STV36 STV40

Weight (with ROPS)

Clutch Dry single plate
Steering Hydrostatic power steering

Travelling
system

Hydraulic
system

PTO
system

Transmission Main-hydrostatic transmission, range gear shift (3 forward and 3 reverse)
Brake Wet disk type
Min. turning radius

(with bi-speed turn)
Differential Bevel gear
Hydraulic control

system

Pump capacity

Three point hitch SAE Category 1

Max. lift
force

Rear

Mid

975 kg

(2150 Ibs)

At lift
points

24 in.
behind lift
points

PTO shaft SAE 1-3/8, 6 splines
Revolution 2 speeds (540 rpm at 2670 engine rpm, 800 rpm at 2717 engine rpm)
PTO shaft U.S.A. No.5 (KUBOTA 10-tooth) involute spline
Revolution 1 speed (2500 rpm at 2734 engine rpm)

995 kg

(2194 Ibs)

2.2 m (7.2 feet) with brake, 2.5 m (8.2 feet) without brake

3P : 22.3 L / min (5.9 U.S.gals / min, 4.9 Imp.gals min)

Power steering : 13.6 L / min (3.6 U.S.gals / min., 3.0 Imp.gals / min)

975 kg

(2150 Ibs)

Position control

1150 kg (2535 Ibs)

890 kg (1962 Ibs)

995 kg

(2194 Ibs)

975 kg

(2150 Ibs)

995 kg

(2194 Ibs)

Note : * Manufacture's estimate.

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

0000004797E

8

STV32 · STV36 · STV40, WSM TRAVELLING SPEEDS

KiSC issued 04, 2006 A

TRAVELLING SPEEDS

Model STV32, 36, 40

Tire Size (Rear) 9.5 - 22 13.6 - 16

Range gear shift lever km/h km/h

1 (Low) 0 to 6.6 0 to 6.5

Forward

2 (Middle) 0 to 12.7 0 to 12.6

3 (High) 0 to 28.4 0 to 28.2

Max. Speed (at 2850 engine rpm) 29.9 29.8

1 (Low) 0 to 4.8 0 to 4.7

2 (Middle) 0 to 9.2 0 to 9.2

Reverse

3 (High) 0 to 20.6 0 to 20.4

Max. Speed (at 2850 engine rpm) 21.7 21.6

The company reserves the right to change the specifications without notice

0000008023E

9

STV32 · STV36 · STV40, WSM DIMENSIONS

KiSC issued 04, 2006 A

DIMENSIONS

0000006808E

10

KiSC issued 04, 2006 A

G GENERAL

CONTENTS

KiSC issued 04, 2006 A

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

2. GENERAL PRECAUTION..................................................................................................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-6

[5] HANDLING OF CIRCUIT TESTER.................................................................................G-7

4. LUBRICANTS, FUEL AND COOLANT.............................................................................G-8

5. TIGHTENING TORQUES...................................................................................................G-9

[1] GENERAL USE SCREWS, BOLTS AND NUTS ..........................................................G-9

[2] STUD BOLTS ...................................................................................................................G-9

6. MAINTENANCE CHECK LIST ........................................................................................G-10

7. CHECK AND MAINTENANCE ........................................................................................G-12

[1] DAILY CHECK............................ ..... ............................................................. ..................G-12

[2] CHECK POINTS OF INITIAL 50 HOURS...................................................................G-13

[3] CHECK POINTS OF EVERY 50 HOURS...................................................................G-18

[4] CHECK POINTS OF EVERY 100 HOURS.................................................................G-20

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

[6] CHECK POINTS OF EVERY 400 HOURS.................................................................G-29

[7] CHECK POINTS OF EVERY 600 HOURS.................................................................G-30

[8] CHECK POINTS OF EVERY 800 HOURS.................................................................G-30

[9] CHECK POINTS OF EVERY 1 YEAR........................................................................G-30

[10] CHECK POINTS OF EVERY 2 YEARS......................................................................G-30

[11] OTHERS..........................................................................................................................G-33

8. SPECIAL TOOLS .............................................................................................................G-36

[1] SPECIAL TOOLS FOR ENGINE..................................................................................G-36

[2] SPECIAL TOOLS FOR TRACTOR...............................................................................G-42

9. TIRES ................................................................................................................................G-47

[1] TIRE PRESSURE...........................................................................................................G-47

[2] TREAD.............................................................................................................................G-48

(1) Front Wheels...........................................................................................................G-48

(2) Rear Wheels............................................................................ ................................G-49

[3] TIRE LIQUID INJECTION..............................................................................................G-50

10.IMPLEMENT LIMITATIONS .............................................................................................G-52

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

1. TRACTOR IDENTIFICATION

When contacting your local KUBOTA distributor, always specify
engine serial number, tractor serial number and hour meter
reading.

(1) Tractor Identification Plate (3) Engine Serial Number
(2) Tractor Serial Number

0000007957E

G-1

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

2. GENERAL PRECAUTION

A During disassembly, carefully arrange removed parts in a

clean area to prevent conf usion late r. Screws, bolts and nuts
should be installed in their original position to prevent
reassembly errors.

A When special tools are required, use KUBOTA genuine

special tools. Special tools which are not frequently used
should be made according to the drawings provided.

A Before disassembling or servicing electrical wires, always

disconnect the ground cable from the battery first.

A Remove oil and dirt from parts before measuring.
A Use only KUBOTA genuine parts for parts replacement to

maintain machine performance and to assure safety.

A Gaskets and O-rings must be replaced during reassembly.

Apply grease to new O -rings or oil seals b efore assembling.
See the figure left side.

A When reassembling external snap rings or internal snap rings,

they must be position ed so that sharp edge face s again st the
direction from which a force is applied. See the figure left side.

A When inserting spring pins, their splits must face the direction

from which a force is applied. See the figure left side.

A To prevent damage to t he hydraul ic system, u se only sp ecified

fluid or equivalent.

(1) Grease (A) External Snap Ring
(2) Force (B) Internal Snap Ring
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement

0000000612E

G-2

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS
AND WIRING

To ensure safety and prevent damage to the machine and
surrounding equipment, heed the following precautions in
handling electrical parts and wiring.

A 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 same time
recommend the dealer to perform periodic check for a fee.

A Do not attempt to modify or remodel any electrical parts

and wiring.

A When removing the battery cables, disconnect the

negative cable first. When installing the battery cables,
connect the positive cable first.

(1) Negative Terminal (2) Positive Terminal

0000000613E

[1] WIRING

A Securely tighten wiring terminals.

(1) Correct (2) Incorrect

(Securely Tighten) (Loosening Leads to Faulty

Contact)

A Do not let wiring contact dangerous part.

(1) Dangerous Part (3) Wiring (Correct)
(2) Wiring (Incorrect) (4) Dangerous Part

A Securely insert grommet.

(1) Grommet (A) Correct

(B) Incorrect

0000000614E

0000000615E

0000000616E

G-3

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

A Repair or change torn or aged wiring immediately.

(1) Aged (3) Insulating Vinyl Tape
(2) Torn

0000002256E

A Securely clamp, being careful not to damage wiring.

(1) Clamp (3) Clamp

*Wind Clamp Spirally (4) Welding Dent

(2) Wire Harness

0000000617E

A Clamp wiring so that there is no twist, unnecessary sag, or

excessive tension, except for movable part, where sag be
required.

(1) Wiring (A) Correct
(2) Clamp (B) Incorrect

0000000618E

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

(1) Wiring (A) Incorrect

0000000619E

G-4

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

A After installing wiring, check protection of terminals and

clamped condition of wiring, only connect battery.

(1) Cover

*Securely Install Cover

0000000620E

[2] BATTERY

A Take care not to confuse positive and negative terminal posts.
A When removing battery cables, disconnect negative cable

first. When installing battery cables, check for polarity and
connect positive cable first.

A Do not install an y b atte ry wi th ca pac it y o the r than is s pe ci fie d

(Ah).

A After connecting cab les to battery terminal posts, apply high

temperature grease to them and securely install terminal
covers on them.

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

[3] FUSE

A Take care not to let battery liquid spill on your skin and

clothes. If contaminated, wash it off with water
immediately.

A Before recharging the battery, remove it from the

machine.

A Before recharging, remove cell caps.
A Do recharging in a well-ventilated place where there is no

open flame nearby, as hydrogen gas and oxygen are
formed.

0000000621E

A Use fuses with specified capacity.

Neither too large or small capacity fuse is acceptable.

A Never use steel or copper wire in place of fuse.
A Do not install working light, radio set, etc. on machine which is

not provided with reserve powe r suppl y.

A Do not install accessories if fuse capacity of reserve power

supply is exceeded.

(1) Fuse (2) Fusible Link

0000000622E

G-5

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[4] CONNECTOR

A For connector with lock, push lock to separate.

(A) Push

0000000623E

A In separating connectors, do not pull wire harnesses.
A Hold connector bodies to separate.

(A) Correct (B) Incorrect

0000000624E

A Use sandpaper to remove rust from terminals.
A Repair deformed termin al. Make certain th ere is no terminal

being exposed or displaced.

(1) Exposed Terminal (3) Sandpaper
(2) Deformed Terminal (4) Rust

0000000625E

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

(A) Correct (B) Incorrect

0000000626E

G-6

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

A Make certain plastic cover is large enough to cover whole

connector.

(1) Cover (A) Correct

(B) Incorrect

0000000627E

[5] HANDLING OF CIRCUIT TESTER

A Use tester correctly following manual provided with tester.
A Check for polarity and range.

0000000628E

G-7

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

4. LUBRICANTS, FUEL AND COOLANT

Place Capacity Lubricants, fuel and coolant

1 Fuel tank

2 Coolant (with reserve tank)

3 Engine crankcase (with filter)

4 Transmission case

5 Front differential case oil

Place No. of greasing point Capacity Type of grease

29.5 L

7.79 U.S.gals.

6.49 lmp.gals.

6.1 L

6.4 U.S.qts.

5.4 lmp.qts.

6.7 L

7.1 U.S.qts.

5.9 lmp.qts.

22 L

5.81 U.S.qts.

4.84 lmp.qts.

4.0 L

4.2 U.S.qts.

3.5 lmp.qts.

Grease

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

Fresh clean water with anti-freeze

Engine oil: API service CC or CD
class
Below 0 (32 ) :
SAE10W, 10W-30 or 10W-40
0 to 25 (32 to 77 ) :
SAE20, 10W-30 or 10W-40
Above 25 (77 ) :
SAE30, 10W-30 or 10W-40

KUBOTA SUPER UDT fluid*

KUBOTA SUPER UDT fluid or
SAE80, 90 gear oil

Brake pedal shaft 1
Clutch pedal shaft 1
Top link 2
Lift rod 1

6

Battery terminal 2
Cruise control lever 2
Speed control wire Oiling Engine oil

*KUBOTA original transmission hydraulic fluid.

Until grease
overflows

Moderate
amount

Multipurpose

type grease

0000007958E

G-8

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

5. TIGHTENING TORQUES

[1] GENERAL USE SCREWS, BOLTS AND NUTS

Screws, bolt and n uts whose tightening torque are n ot specified in this Workshop M anual should be tightened

according to the table below.

Indication on top of

bolt

Material of bolt SS400, S20C S43C, S48C SCr435, SCM435

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.)

7.85
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

No-grade or 4T 7T 9T

Ordinariness Aluminum Ordinariness Aluminum Ordinariness

ft-lbs ft-lbs ft-lbs ft-lbs ft-lbs

0.80

5.79

7.85

0.80

5.79

9.81

1.00

7.24

7.85

0.80

5.79

12.3

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

8.82

16.7
to

19.6

31.4
to

34.3

to

0.90

1.7
to

2.0

3.2
to

3.5

to

6.50

12.3
to

14.4

23.2
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

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

to

8.82

17.7
to

20.5

39.3
to

44.1

62.8
to

72.5

to

0.90

1.8
to

2.1

4.0
to

4.5

6.4
to

7.4

to

6.50

13.1
to

15.1

29.0
to

32.5

46.3
to

53.5

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

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

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

[2] STUD BOLTS

Material of oppone t

Unit
Diameter

(8 mm, 0.31 in.)

(10 mm, 0.39 in.)

(12 mm, 0.47 in.)

part

M8

M10

M12

Ordinariness Aluminum

ft-lbs ft-lbs

11.8

15.6

24.6

31.3

29.5

49.0

to

to

to

1.2
to

1.6

2.5
to

3.2

3.0
to

5.0

8.68

8.82

to

11.5

18.1

23.1

21.7

36.1

to

11.8

19.7

to

to

25.4

to

31.4 3.2 23.1

0.90
to

1.2

2.0
to

2.6

0000000766E

6.51
to

8.67

14.5
to

18.8

0000000767E

G-9

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

6. MAINTENANCE CHECK LIST

Period

No.

Item

1 Greasing -

Engine start

2

system
Wheel bolt

3

torque

4 Engine oil Change

5 Brake pedal Adjust

6 Fan belt Adjust

7 Clutch pedal Adjust

Battery

8

condition

Air cleaner

9

element
[Single type]

Air cleaner
element
[Double type]
(Primary
element)

10

Air cleaner
element
[Double type]
(Scondary
element)

Fuel filter

11

element

12 Parking brake Adjust

13 Fuel line

14 Engine oil filter Replace

Hydraulic oil

15

filter
Hydraulicoil filter

16

[HST]

17 Toe-in Adjust

Check

Check

Check

Clean

Replace

Clean

Replace

Replace

Clean

Replace

Check

Replace

Replace

Replace

Indication on hour meter

50 100 150 200 250 300 350 400 450 500 550 600 650 700

After

since

every

50Hr

every

50Hr

every

50Hr

every

100Hr

every

100Hr

every

100Hr

every

100Hr

every

100Hr

every

100Hr

every 1

year

every

100Hr

every 1

year

every 1

year

every

100Hr

every

400Hr

every

100Hr

every

100Hr

every 2

years
every

200Hr

every

200Hr

every

200Hr

every

200Hr

Refer-

ence
page

G-18,

19

G-19

G-20

G-13

G-23

G-23

G-17

G-25 *4

G-21 *1

G-21

G-21 *1

G-21 *2

G-21

G-22

G-22

G-24

G-22

G-22 *3

G-14

G-16

G-16

G-29

G-10

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Period

No.

Item

Radiator hose

18

and clamp

Power steering

19

hose

HST oil line

20

[HST]

Transmission

21

fluid
Front axle case

22

oil

23 Front axle pivot Adjust

Engine valve

24

clearance

25 Cooling system Flush

26 Coolant Change

27 Fuel system Bleed

Clutch housing

28

water
29 Fuse Replace G-34
30 Light bulb Replace G-35

Check

Replace

Check

Replace

Check

Replace

Change

Change

Adjust

Drain G-33

50 100 150 200 250 300 350 400 450 500 550 600 650 700

Indication on hour meter

After

since

every

200Hr

every 2

years
every

200Hr

every 2

years
every

200Hr

every 2

years
every

400Hr

every

400Hr

every

600Hr

every

800Hr

every 2

years

every 2

years

Service

as

required

Refer-

ence

page

G-27

G-27 *3

G-28

G-28

G-28

G-28 *3

G-15

G-16

G-30

1-S13

G-31

G-31

G-33

A The jobs indicated by must be done after the first 50 hours of operation.
A *1 : Air cleaner should be cleaned more often in dusty conditions than in normal conditions.
A *2 : Every year or every 6 times of cleaning.
A *3 : Replace only if necessary.
A *4 : When the battery is used for less than 100 hours per year, check the battery condition by reading

the indication annually.

0000007959E

G-11

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

7. CHECK AND MAINTENANCE

A Be sure to check and serv ice the tractor on a flat place with engine shut off , the parkin g brake on and

chock the wheels.

0000000633E

[1] DAILY CHECK

To prevent troubl e from occ urring, it is important to know t he condition of the tra ctor. Check the foll owing items

before starting.

Checking

A Check areas where previous trouble was experienced.
A 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 seat belt and ROPS attaching hardware.

7. Check and clean the radiator screen and grill.

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

9. Check the number plate.

10.Care of danger, warning and caution labels

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

A While sitting in the operator's seat.

1. Check the HST pedal, brake pedals and clutch pedal.

2. Check the parking brake.

3. Check the steering wheel.

A 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.

A 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.

0000007965E

G-12

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[2] CHECK POINTS OF INITIAL 50 HOURS

Changing Engine Oil

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

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, rem ove the dr ain plu g (1) at the b ottom
of the engine and drain the oil completely.

4. Screw in the drain plug (1).

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

A When using an oil of different manufacture or viscosity

from the previous one, remove all of the old oil.

A Never mix two different types of oil.
A Use the proper SAE Engine Oil according to ambient

temperatures.

A Refer to "LUBRICANTS, FUEL AND COOLANT". (See

page G-8.)

Engine oil Capacity

6.7 L

7.1 U.S.qts

5.9 lmp.qts

(1) Drain Plug (A) Oil level is acceptable within
(2) Dipstick this range.
(3) Oil Inlet Plug

0000007967E

G-13

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Replacing Engine Oil Filter Cartridge

A Be sure to stop the engine before changing oil filter

cartridge.

A 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 rubber seal of new filter.

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 little. Thus see that the eng ine oil d oes
not leak through the seal and be sure to read the oi l level on
the dipstick. Then, replenish the engine oil up to the specified
level.

A To prevent serious damage to the engine, replacement

filter must be highly efficient. Use only a KUBOTA
genuine filter or its equivalent.

(1) Engine Oil Filter

0000007968E

G-14

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Changing Transmission Flu id

A Be sure to stop the engine when checking and changing

the transmission fluid.

A 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 plug (1) at the bottom of the transmission
case.

3. Drain the transmission fluid.

4. After draining, screw in the drain plug.

5. Fill new oil from filling port after removing the filling plug (2) up
to the upper notch on the dipstick.

6. After running the eng ine for a few minu tes, stop it a nd check
the oil level again, if low, add oil to the prescribed level.

A 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-8.).

A Never work the tractor immediately after changing the

transmission oil. Keeping the engine at medium speed
for a few minutes to prevents dama ge to the transmission.

A Do not mix different blands oil together.

Transmission fluid Capacity

22 L

5.81 U.S.gals

4.84 Imp.gals

(1) Drain Plug A : Oil level is acceptable within
(2) Filling Plug this range.
(3) Dipstick

0000007969E

G-15

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Replacing Hydrauli c Oil Filter Cartridge

A Be sure to stop the engine before changing the oil filters.
A Allow engine to cool down sufficiently, oil can be hot and

can burn.

1. Drain the transmission fluid.

2. Remove the both oil filter cartridges by using a filter wrench.

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

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

5. After the new cartridge ha s been replaced, the transmissio n
fluid level will normally decrease slightl y. Make sure that the
transmission fl uid does n ot leak through the seal. Check the
fluid level.

A To prevent serious damage to the hydraulic system. Use

only a genuine KUBOTA filter or its equivalents.

(1) Drain Plug (3) Hydraulic Oil Filter (for HST)
(2) Hydraulic Oil Filter

0000007970E

Changing Front Axle Case Oil

A Be sure to stop the engine before changing the front axle

case oil.

A Allow engine to cool down sufficiently, oil can be hot and

can burn.

1. Remove the both right and left drain plugs (2) at bottom of the
bevel gear case.

2. Drain the front axle case oil.

3. After draining, screw in the two drain plugs.

4. Fill new oil from filling port with specified amount.

A Use KUBOTA SUPER UDT fluid or SAE 80, 90 gear oil.

Refer to "LUBRICANTS, FUEL AND COOLANT" (See
page G-8.)

A Oil level is at the center of the front axle.

Front axle case oil Capacity

4.0 L

1.06 U.S.gals.

0.88 Imp.gals.

(1) Filling Plug A : Oil Level
(2) Drain Plug

0000007971E

G-16

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Checking Clutch Pedal Free Travel

A When checking, park the tractor on flat ground, apply the

parking brake, stop the engine and remove the key.

1. Slightly depress the clutch pe dal (1) and measure free travel
"L" at top of clutch pedal.

2. If the measurement is not within the factory specifications,
loosen the lock nut and adjust the clutch rod (2) length.

A After adjustment, b e sure to check t hat engine does no t

start without depressing the clutch pedal but engine start
when depressing the clutch pedal.

Clutch pedal free travel
"L"

(1) Clutch Pedal L : Free Travel
(2) Clutch Rod

Factory spec.

20 to 30 mm

0.78 to 1.18 in.

0000007972E

G-17

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[3] CHECK POINTS OF EVERY 50 HOURS

Greasing (To be continued)

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

(1) Grease Fitting (Top Link) (4) Grease Fitting
(2) Grease Fitting (Brake Pedal Shaft)

(Lifting Rod RH) (5) Grease Fitting

(3) Battery Terminal (Clutch Pedal Shaft)

0000007973E

G-18

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Greasing (Continued)

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

(1) Cruise Control Lever Guide

0000007974E

Checking Engine Start System

A Do not allow anyone near the tractor while testing.
A If the tractor does not pass the test do not operate the

tractor.

B Preparation before testing

1. Place all control levers in the "NEUTRAL" position.

2. Set the parking brake and stop the engine.

B Test : Switch for the speed control pedal

1. Sit on the 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 switch.

5. Turn the key to "START" position.

6. The engine must not crank.

B Test : Switch for the PTO clutch control switch

1. Sit on the operator's seat.

2. Engage the PTO clutch control switch.

3. Depress the clutch pedal Fully.

4. Place the speed control pedal in neutral position.

5. Turn the key to "START" position.

6. The engine must not crank.

B Test : Switch for the clutch pedal

1. Sit on the operator's seat.

2. Disengage the PTO clutch control switch.

3. Place the speed control pedal in neutral position.

4. Release the clutch pedal.

5. Turn the key to "START" position.

6. The engine must not crank.

B After Testing : If crank any t est of the above, adjust or

replace the required safety switch.

(1) Speed Control Pedal (3) PTO Clutch Control Switch
(2) Clutch Pedal

0000007975E

G-19

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Checking Wheel Mounting Screws and Nuts Tightening Torque

A Never operate tractor with a loose rim, wheel or axle.
A Any time screws and nuts are loosened, retighten to

specified torque.

A Check all screws and nuts frequently and keep them tight.

1. Check the wheel mounting screws and nuts regularly
especially when new. If there are loosened, tighten as follows.

Front wheel mounting
screw and nut

Tightening torque

Rear wheel mounting
screw and nut

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

and Nut and Nut

85

9.0

65.1 ft-lbs
215

22.0

159.1 ft-lbs

0000007976E

[4] CHECK POINTS OF EVERY 100 HOURS

Changing Engine Oil

1. See page G-13.

Checking Clutch Pedal Free Travel

1. See page G-17.

0000007977E

0000007978E

G-20

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Cleaning Air Cleaner Element

[Single Element and Double Element Type]

1. Remove the air cleaner cover (3) and element (primary) (1).

2. Clean the element (primary) (1) :

A When dry dust ad heres to t he element, blow compr essed air

from the inside, turning the element. Pressure of compressed
air must be under 205 kPa (2.1 , 30 psi).

A When carbon or oil adher es to the el em ent, 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 insi de of th e elem ent with a lig ht and check i f it
is damaged or not.

3. When replacing the air cleaner eleme nt (prima ry) (1), repl ace
the secondary element (4) as well :
Once a year or after e very six times of cleaning, whichever
comes first.

A The air cleaner uses a dry element, never apply oil.
A Do not run the engine with filter element removed.
A Be sure to refit the dust cup with the arrow (on the rear

of cup) upright. If the dust cup is improperly fitted,
evacuator valve will not function and dust will adhere to
the element.

A Do not touch the secondary element except in cases

where replacing is required.

B Evacuator Valves

Open the evacuator valve (2) once a week under ordinary
conditions or daily when used in a dusty place to get rid of la rge
particles of dust and dirt.

(1) Element (Primary) [A] Single Element Type
(2) Evacuator Valve [B] Double Element Type
(3) Cover
(4) Secondary Element (Safety)

0000007979E

G-21

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Cleaning Fuel Filter

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

1. Close the fuel filter cock (1).

2. Unscrew the screw ring and remove 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, reassemble the fuel filter, keeping out dust and

dirt.

5. Bleed the fuel system. (See page G-33.)

A If dust and dirt enters the fuel sy stem the fuel pump an d

injection nozzles are subject to premature wear. To
prevent this, be sure to clean the fuel filter bowl
periodically.

(1) Fuel Cock (4) Filter Element
(2) Fuel Filter Bowl (5) Screw Ring
(3) O-ring
(4) O-ring A : Clos e

0000007980E

Checking Fuel Line

A Stop the engine whe n attempting the check and change

prescribed below.

A Remember to check the 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 clam ps are tight and not

damaged.

2. If hoses and clamps ar e found worn or damaged, repl ace or

repair them at once.

3. The fuel line is made of r ub ber an d ag es r ega rd less of p er iod

of service. Replace the fuel pipe together with the clamp every
two years and securely tighte n.

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 clamp have been changed, bleed the

fuel system. (See page G-33.)

A 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 taken not to admit dust
and dirt into the fuel pump.

(1) Fuel Hose (2) Clamp

0000007981E

G-22

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Checking Fan Belt Tension

A Be sure to stop engine before checking belt tension.

1. Stop the engine and remove the key.

2. Apply moderate thumb pressure to belt between pulleys.

3. If tension is incorrect, loosen the alternator mounting bolts and

using a lever placed betw een the alternator and the engine
block, pull the alternator out until the deflection of the belt falls
within acceptable limits.

4. Replace fan belt if it is damaged.

A deflection of between 7 to

Fan Belt tension Factory spec.

(1) Adjusting Screw A : Check the belt tension
(2) Fan Belt B : To tighten

9 mm (0.28 to 0.35 in.)
when the belt is pressed in
the middle of the span.

0000007982E

Checking Brake Pedal Free Travel

A Stop the engine and chock the wheels before checking

brake pedal.

A The difference between the right and left pedal plays mus t

be less than 5.0 mm (0.19 in.).

1. Release the parking brake.

2. Slightly depress the brak e p eda ls (1) a nd me asur e fr ee trav el

(L) at top of pedal stroke.

3. If the measurement is not within the factory specifications,

loosen the lock nut (2) and turn the brake rod (3).

4. Retighten the lock nut (2) securely.

Keep the free travel in the right and left brake pedals equal.

Brake pedal free travel
"L"

(1) Brake Pedal L : Free Travel
(2) Lock Nut
(3) Brake Rod

Factory spec.

20 to 30 mm

0.79 to 1.18 in.

0000007983E

G-23

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Checking Parking Brake

A Be sure to stop engine before checking parking brake.

1. Slowly raise the pa rking brake lever ( 1) to the ratchet soun d

made by the parking brake lever.

2. If the No. of notch is not within the factory specifications,

loosen the lock nut (2) and turn th e brake ro d LH (3) and RH
(4) to adjust within acceptable limits.

3. Retighten the lock nut (2) securely..

Parking brake lever free travel

2 notches
(Ratchet sound 2)

A Check the brake pedal free travel after adjusting the

parking brake.

A Refer to "BRAKE" section for detailed method.

(1) Parking Brake Lever (4) Brake Rod RH
(2) Lock Nut
(3) Brake Rod LH A : Pull

0000007984E

G-24

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Checking Battery Condition

A 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 may shorten t he battery's service life or
cause an explosion. Check the fluid level regularly an d
add distilled water as required so that the fluid level is
between the UPPER and LOWER levels.

A Never remove the vent plugs while the engine is running.
A Keep electrolyte away from eyes, hands and clothes. If

you are spattered wi th it, wash it away comple tely with
water immediately and get medical attention.

A Wear eye protection and rubber gloves when working

around battery.

A 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 batter y shortens the se rvice life and ad ds to

maintenance costs.

2. The original battery is maintenance free type battery, but need

some servicing.
If the battery is weak, the eng ine is difficult to start and the
lights be dim. It is important to check the battery periodically.

3. Check the battery condition by reading the indicator.

State of indicator display

Green

Black Needs charging battery.
White Needs changing battery.

Specific gravity of electrolyte and quality of electrolyte are both
in good condition.

(1) Battery (2) Indicator

0000007986E

G-25

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Battery Charging

A When the battery is being activated, hydrogen and

oxygen gases in the battery are extremely explosive.
Keep open s p arks and fla m es a wa y f ro m t h e ba ttery at all
times, especially when charging the battery.

A When charging battery, ensure the vent caps are securely

in place (if equipped).

A 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.

A 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 ch arger 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 charged if the indicator display turns green from

black.

4. When exchanging an old battery into ne w one, u se batt ery of

equal specification shown in table 1.

Table 1

Tractor model Battery TYPE volts

STV32 - 40 75D26R 12 52

5HR. capacity

(A.H.)

Tractor model

STV32 - 40 123 490 6.5

Reserve Capacity

(min)

Cold Cranking

Amps

Normal Charging

Rate (A)

B Direction for Storage

1. When storing the tra ctor for long per iods of time, rem ove the

battery from tracto r, adjust the elec trolyte 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 seasons and once
every six months in cold seasons.

(1) Battery

0000007987E

G-26

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[5] CHECK POINTS OF EVERY 200 HOURS

Replacing Engine Oil Filter Cartridge

1. See page G-14.

0000007988E

Replacing Hydrauli c Oil Filter Cartridge

1. See page G-16.

0000007989E

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 (2) are loose or water leaks, tighten hose

clamps (2) securely.

2. Replace hoses (1) and tighten hose clamps (2) securely, if

radiator hoses (1) 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.

B Precaution at Overheating

Take the following actions in the event the coolant temperature
be nearly or more than the boiling point, what is called
"Overheating".

1. Stop the machine operation in a safe place and keep the

engine 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 burn, 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

0000005093E

G-27

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Checking HST Oil Line and Power Steering Hose

1. Check to see that all lines (1), (2) and hose cl amps are tight

and not damaged.

2. If hoses and clamps ar e found worn or damaged, repl ace or

repair them at once.

(1) HST Oil Line (2) Power Steering Hose

0000007990E

G-28

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

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 whe els are in the str aight ahea d

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 shou ld 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.

B Adjusting

1. Detach the snap ring (1) from the dust cover.

2. Loosen the tie-rod lock nut (2) and turn the tie- rod joint (3 ) to

adjust the tie-rod length until the proper toe-in measurement is
obtained.

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

4. Attach the snap ring (1) to the dust cover.

Tightening torque Tie-rod lock nut

117 to 137

12.0 to 14.0

86.1 to 101.3 ft-lbs

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

(1) Snap Ring (A) Wheel to Wheel Distance at
(2) Tie-rod Lock Nut Front
(3) Tie-rod Lock Joint (B) Wheel to Wheel Distance at

[6] CHECK POINTS OF EVERY 400 HOURS

Changing Transmission Flu id

1. See page G-15.

Replacing Fuel Filter Element

1. See page G-22.

Changing Front Axle Case Oil

1. See page G-16.

Rear

(C) Front

0000007991E

0000007992E

0000007993E

0000007994E

G-29

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[7] CHECK POINTS OF EVERY 600 HOURS

Adjusting Front Axle Pivot

1. Loosen the lock nut (2) , tigh ten the adj us tin g s crew (1 ) all th e

way, and then loosen the adjusting screw (1) by 1/6 turn.

2. Retighten the lock nut (2).

A If the axle pivot pin adjustment is not correct, front wheel

vibration can occur causing vibration in the steering
wheel.
Refer to "FRONT AXLE" section for details.

(1) Adjusting Screw (2) Lock Nut

0000007995E

[8] CHECK POINTS OF EVERY 800 HOURS

Checking Va lve Clearan ce

1. See page 1-S13.

0000007996E

[9] CHECK POINTS OF EVERY 1 YEAR

Replacing Air Cleaner Element (Primary) and Secondary Element

1. See page G-21.

[10]CHECK POINTS OF EVERY 2 YEARS

Replacing Radiator Hose (Water Pipes)

1. Replace the hoses and clamps.

Refer to "Checking Radiator Hose and Hose Clamp" (See
page G-27.)

Replacing Fuel Hose

1. Replace the fuel hoses and clamps, if necessary.

Refer to "Checking Fuel Line" (See page G-22.)

Replacing Power Steering Hose

1. Replace the hoses and clamps.

Refer to "Checking HST Oil Lin e and Power Steering Hose"
(See page G-28.)

0000007997E

0000007998E

0000007999E

0000008000E

Replacing HST Oil Line

1. Replace the hoses and clamps.

Refer to "Checking HST Oil Lin e and Power Steering Hose"
(See page G-28.)

0000008001E

G-30

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Flush Cooling System and Changing Coolant (To be continued)

A 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 drain plug (3) and remove

radiator cap (1). The radiator cap (1) must be removed to
completely to 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 (2).

8. Start and operate the engine for few minutes.

9. Stop the engine and let cool. Che ck coolant lev el of reco very

tank (2) and add coolant if necessar y .

A Do not start engine without coolant.
A Use clean, fresh water and anti-freeze to fill the radiator

and recovery tank.

A When the anti-freeze is mixed with water, t he anti-freeze

mixing ratio must be less than 50 %.

A Securely tighten radiator cap. If the cap is loose or

improperly fitted, water may leak out and the engine could
overheat.

A Refer to "LUBRICANTS, FUEL AND COOLANT" (See

page G-8.)

Coolant capacity (with recovery tank)

(1) Radiator Cap A : FULL
(1) Recovery Tank B : LOW
(1) Drain Plug

6.1 L

6.4 U.S.qts.

5.4 Imp.qts.

0000008002E

G-31

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Flush Cooling System and Changing Coolant (Continued)

B Anti-Freeze

If it freezes, cooling water can damage the cylinders and
radiator. If is necessary, if the ambient temperature falls below 0

(32 ) to remove coolant water afte r op er ating or t o a dd an ti­freeze 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 J19814c.

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

Vol % Anti-freeze

40 -24 -12 106 222
50 -37 -34 108 226

Freezing Point Boiling Point*

* At 760 mmHg pr essure (atmospheric). A hig her b oil in g p o in t
is obtained by usin g a radiator pressure cap which pe rmits the
development of pressure within the cooling system.

A The above data represent industry standards that

necessitate a minimum glycol content in the concentrated
anti-freeze.

A When the coolant level drops due to evaporation, add

water only. In case o f leakag e, add anti-f reeze an d wate r
in the specified mixing ratio.

A Anti-freeze absorbs moisture. Keep unused anti-freeze in

a tightly sealed container.

A 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.)

0000004769E

G-32

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[11]OTHERS

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.

A Do not bleed the fuel system when the engine is hot.

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 a nd run for a bou t 3 0 sec on ds , a nd the n s to p

the engine.

4. Close the air vent cock.

A Always close the air vent cock (1) except for bleeding fuel

lines. Otherwise, engine runs irregularly or stalls
frequently.

(1) Fuel Cock (A) CLOSE
(2) Air Vent Cock (B) OPEN

0000008003E

Draining Clutch Housing Water

A The tractor is equipped with drain plug (1) under the

clutch housing.

A After operating in rain, snow or tractor has been washed,

water may get into the clutch housing.

1. Remove t he dr ain plug (1 ) and drai n th e wa ter , then ins tal l the

plug again.

(1) Water Drain Plug

0000008004E

G-33

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Replacing Fuse

1. The tractor electrical system is protected from potential

damage by fuses.
A blown fuse indicates that there is an overload or short
somewhere in the electrical system.

2. If any of the fuses shoul d blow, replace with a new one of th e

same capacity.

A Before replacing a blown fuse, determine why the fuse

blew and make any nece ssary repairs. Failure to follo w
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.

B Protected circuit

FUSE No. CAPACITY (A) Protected circuit

(1) 30 Starter
(2) 15 Hazard
(3) 10 Position
(4) 10 Alternator panel
(5) 15 Head light / Horn
(6) 10 Control box / PTO solenoid
(7) 5 Ke y stop
(8) 10 Work light
(9) 10 Brake

(10) 10 Flasher

Slow blow fuse

50 Main

(11)

40 Key switch
40 Key stop
40 Glow

0000008005E

G-34

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

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 Capacity
Head lights 45 W /40 W
Tail light 10 W
Brake stop light 21 W
Turn signal / Hazard light 21 W
Front Position light 10 W
Instrument panel light 1.7 W
Work light (if equipped) ­Number plate light 10 W

0000008006E

G-35

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

8. SPECIAL TOOLS

[1] SPECIAL TOOLS FOR ENGINE

Special Use Puller Set

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

other parts with ease.

0000000677E

Piston Ring Compressor

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

piston rings into the cylinder.

0000000678E

Piston Ring Tool

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

piston ring with ease.

0000000679E

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) 07909-31281 (J)
07909-31231 (H)
Application : Use to measure diesel engine compression and

diagnostics of need for major overhaul.

(1) Gauge (7) Adaptor F
(2) L Joint (8) Adaptor G
(3) Adaptor A (9) Adaptor H
(4) Adaptor B (10) Adaptor I
(5) Adaptor C (11) Adaptor J
(6) Adaptor E

0000000680E

G-36

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Oil Pressure Tester

Code No : 07916-32032
Application : Use to measure lubricating oil pressure.

(1) Gauge (5) Adaptor 2
(2) Cable (6) Adaptor 3
(3) Threaded Joint (7) Adaptor 4
(4) Adaptor 1 (8) Adaptor 5

0000000681E

Valve Seat Cutter

Code No : 07909-33102
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.)

0000000682E

Radiator Tester

Code No : 07909-31551
Application : Use to check of radiator cap pressure, and leaks

from cooling system.

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

0000000815E

Connecting Rod Alignment Tool

Code No : 07909-31661
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.)

0000000684E

G-37

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Nozzle Tester

Code No : 07909-31361
Application : Use to check the fuel injection pressure and spray

pattern of nozzle.

Measuring : 0 to 50 MPa
range (0 to 500 , 0 to 7000 psi)

0000000685E

Auxiliary Socket for Fixing Crankshaft Sleeve

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

engine.

0000005168E

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.)

0000000686E

Red Check

Code No : 07909-31371
Application : Use to check cracks on cylinder head, cylinder

block, etc..

0000000687E

G-38

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

A The following special tools are not provided, so make them referring to the figure.

0000002319E

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 0.358 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.)

0000005170E

G-39

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Injection Pump Pressure Tester

Application : Use to check fuel tightness of injection pumps.

Pressure gauge full scale : More than 29.4 MPa (300 , 4267

A

psi)
B Copper gasket
C Flange (Material : Steel)
D Hex. nut 27 mm (1.06 in.) across the plat
E Injection pipe
F PF 1/2
G 5 mm (0.20 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 in.)
N 4 mm (0.16 in.)
O 11.97 to11.99 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.)
VM12 x P1.5
a Adhe sive application
b Fillet welding on the enter circumference

0000005171E

G-40

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Bushing Replacing Tools

Application : Use to press out and 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.)

0000005172E

Flywheel Stopper

Application : Use to loosen and tighten the flywheel screw.

A 200 mm (7.87 in.)
B 30 mm (1.18 in.)
C 20 mm (0.79 in.)
D 15 mm (0.59 in.)
E 15 mm (0.59 in.)
F 8 mm (0.31 in.)
G 10 mm dia. (0.39 in. dia.)

0000005174E

G-41

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Crankshaft Bearing 1 Replacing Tool

Application : Use to press out and press fit the crankshaft

bearing 1.

1. Extracting tool

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

A 130 mm (5.12 in.)
B 72 mm (2.83 in.)
C R40 mm (R1.57 in.)
D 9 mm (0.35 in.)
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.)

[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 the steering shaft.

0000005177E

0000005181E

0000005182E

G-42

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Long Connector (HST Measurement Kit for B7100HST)

Code No : 07916-60831
Application : Use for checking HST Charge relief pressure.

0000007960E

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.).

0000005184E

Toe-in Gauge

Code No : 07909-31681

Application : This allows easy measurement of toe-in for all
machine models.

0000005185E

Clutch Pack Disassembly Tool

Code No : 07916-53741

Application : This allows easy installation of bi-speed clutch
pack spring.

0000007961E

G-43

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Adaptor 7

Code No : 07916-32951

Application : Use for checking regulating valve setting
pressure.

0000008040E

Relief Valve Pressure Tester

Code No : 07916-50045

Application : This allows easy measurement of relief set
pressure.

(1) Gauge (07916-50322) (6) Adaptor C (PS3/8)
(2) Cable (07916-50331) (07916-50371)
(3) Threaded Joint (7) Adaptor D (PT1/8)

(07916-50401) (07916-50381)

(4) Threaded Joint (8) Adaptor E (PS3/8)

(07916-50341) (07916-50392)

(5) Adaptor B (M18 x P1.5) (9) Adaptor F (PF1/2)

(07916-50361) (07916-62601)

(10) Adaptor 58 (PT1/4)

(07916-52391)

0000000705E

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

0000005188E

Adaptor Set for Flow Meter

Code No : 07916-54031

Application : Use for testing the hydraulic system.

(1) Adaptor 52 (8) Adaptor 65
(2) Adaptor 53 (9) Adaptor 66
(3) Adaptor 54 (10) Adaptor 67
(4) Adaptor 61 (11) Adaptor 68
(5) Adaptor 62 (12) Adaptor 69
(6) Adaptor 63 (13) Hydraulic Adaptor 1
(7) Adaptor 64

0000005189E

G-44

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

A The following special tools are not provided, so make them referring to the figure.

0000002319E

Adaptor for Flow Meter

Application : Use for checking the hydraulic pump for 3P
linkage.

A When using, attach with following parts.

O-ring : 04811-00180

A 2-8.5 mm dia. (2-0.334 in. dia.)
B 40 mm (1.57 in.)
C 0.52 rad (30 )
D 25 mm (0.98 in.)
E 15 mm (0.59 in.)
F 3 mm (0.118 in.)
G 1.7 to 1.9 mm (0.067 to 0.075 in.)
H 3.0 to 3.25 mm (0.118 to 0.128 in.)

I 8.0 mm dia. (0.315 in.dia.)

J 23.9 to 24.1 mm dia. (0.941 to 0.945 in.dia.)
K 60 mm dia. (2.36 in.dia.)
LPS 3/8
M 1.5 mm Round (0.059 in. Round)
N 0.3 mm Round (0.012 in. Round)
O Chamfer 0.2 mm (0.0078 in.)

0000007962E

Hydraulic Arm Shaft Bushing Replacing Tool

Application : Use for replacing the hydraulic arm shaft bushing

in the hydraulic cylinder block.

Right Left

37.90 to 37.95 mm dia.

A

(1.492 to 1.494 in. dia.)
B 40 mm (1.575 in.) 35 mm (1.378 in.)
C 28 mm dia. (1.102 in.dia.) 25 mm dia. (0.984 in.dia.)
D 44.5 mm dia. (1.75 in. dia.)
E 30 mm dia. (1.18 in. dia.)
F 50 mm (1.97 in.)
G 10 mm (0.39 in.)

34.90 to 34.95 mm dia.
(1.374 to 1.376 in. dia.)

0000007963E

G-45

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Piston Gasket Correcting Tool

Application : Compress the power steering cylinder piston
gasket to the correct side when install the cylinder rod to the
cylinder tube with ease.

A 13.97 mm (0.55 in.)
B 35.052 mm (1.38 in.)
C 0.122 rad (7 )
D 40.000 to 40.039 mm dia. (1.57 to 1.58 in. dia.)
E 46 mm dia. (1.82 in. dia.)

0000007964E

G-46

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

9. TIRES

[1] TIRE PRESSURE

A Do not attempt mount a tire. This should be down by a qualified person with the proper equipment.
A Always maintain the correct tire pressure.

Do not inflate tires above the recommended pressure as shown below.

A Do not use tires larger than specified.
A When you intend to mount different size of tires from equipped ones, consult your distributor about

front drive gear ratio for detail.
Excessive wear of tires may occur due to improper gear ratio.

Tire sizas Inflation pressure

6.00 - 12, 4PR

Front

24 x 8.50 - 14, 4PR

9.5 - 22, 4PR

Rear

13.6 - 16, 4PR

180 kPa

1.8

25.6 psi
160 kPa

1.6

22.8 psi
140 kPa

1.4

19.9 psi
100 kPa

1.0

14.2 psi

Though the tire pressure is factory-set to the prescribed level, it naturally drops slowly in the course of time.
Thus, check it everyday and inflate as necessary.

0000008007E

G-47

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[2] TREAD

A Support tractor securely on stands before removing a wheel.
A Never operate tractor with a loose rim, wheel or axle.

A Always at tach tires as shown in the figure.
A If not attached as the figure, transmission parts may be damaged.
A Do not use tires larger than specified.

0000008008E

Wheel Tightening Screws and Nuts

1. When refitting or adjusting a wheel, tighten the screws and

nuts with specified tightening torqu e.

2. Recheck after driving the tractor 200 m (200 yards) and

therefore according to service interval.

Front wheel mounting
screw and nut

Tightening torque

Rear wheel mounting
screw and nut

85

9.0

65.1 ft-lbs
215

22.0

159.1 ft-lbs

(1) Front Wheel (2) Rear Wheel

0000008009E

(1) Front Wheels

Front wheel tread cannot be adjusted.

A Do not turn front discs to obtain wider tread. In setting up the front wheels, make sure that the inflation

valve stem of the tires face outward.

Tires 6.00 - 12 Farm 24 x 8.50 - 14 Turf

Tread

(1) 1030 mm (40.55 in.) (2) 1030 mm (40.55 in.)

0000008010E

G-48

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

(2) Rear Wheels

A When working on slo pes o r wo rk ing with t r aile r, s et t he w heel tr ead a s w ide as practical for the jo b f or

maximum stability.

Rear tread can be adjusted as shown with the standard equipped tires. To change the tread.

1. Change the position of the right and left tires.
Tires 9.5 - 22 Farm 13.6 - 16 Turf

Tread

(1) 950 mm (37.40 in.) (2) 1070 mm (42.13 in.) (3) 965 mm (37.99 in.) (4) 1055 mm (41.5 in.)

0000008011E

G-49

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

[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 since it fr eezes at 0 (32 ) . The calcium chlor ide solution wil l not freeze and m oreover, 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.

A Do not fill the front tires with liquid.

0000005241E

Preparation of Calcium Chloride Solution

A When making a calcium chloride solution, do not pour

water over calcium chloride since this results in chemical
reaction which will c ause high temperatur e. Instea d add
a small amount of calcium chlorid e to the wa ter at a time
until the desired solution is achieved.

Freezing temp.

-5 (23 ) 12 kg (26.4 lbs)

-10 (14 ) 21 kg (46.3 lbs)

-15 (5 ) 28 kg (61.7 lbs)

-20 (-4 ) 34 kg (75.0 lbs)

-25 (-13 ) 40 kg (88.2 lbs)

-30 (-22 ) 44 kg (97.0 lbs)

-35 (-31 ) 49 kg (108 lbs)

-40 (-40 ) 52 kg (114.6 lbs)

-45 (-49 ) 56 kg (123.5 lbs)

-50 (-58 ) 61 kg (134.5 lbs)

Weight of CaCl to be dissolved in 100 L

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

(a) Water (b) CaCl (Calcium Chloride)

0000005243E

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

0000008014E

G-50

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

Injection

A When a calcium chloride solution is used, cool it before

pouring it into the tire.

A 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 top (only when water is being used).

A 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 9.5 - 22

Slush free at -10 (14 )
Solid at -30 (-22 )
[Approx. 1 kg (2 lbs) CaCl per 4 L (1 gal) of water]

Slush free at -24 (-11 )
Solid at -47 (-52 )
[Approx. 1.5 kg (3.5 lbs) CaCl per 4 L (1 gal) of water]

Slush free at -47 (-52 )
Solid at -52 (-62 )
[Approx. 2.25 kg (5 lbs) CaCl per 4 L (1 gal) of water]

68 kg (150 lbs)

72 kg (159 lbs)

76 kg (168 lbs)

(1) Pump (A) Correct : 75 %
(2) Pressure Tank Air Compresses Like a
(3) Compressor Cushion
(4) Air (B) Incorrect : 100 %
(5) Water Water can not be

Compressed

0000008012E

G-51

STV32 · STV36 · STV40, WSM GENERAL

KiSC issued 04, 2006 A

10.IMPLEMENT LIMITA TIONS

The KUBOTA Trac tor has been thoro ughly tested for p roper performance with implements sold or approved by
KUBOTA. Use with implements which are not sold or approved by KUBOTA and which exceed the maximum
specifications listed below, or which are otherwise unfit for use with the KUB OTA Tractor may result in malfuncti ons
or failures of the tractor, damage to other property and injury to the operator or others. [Any malfunctions or failures
of the tractor resulting from use with improper implements are not covered by the warranty.]

Tread (max. width) Lower link end

Front Rear

max. loading

weight W0

6.00 - 12 Farm

STV32, 36, 40

24 x 8.50 - 14

Turf

Lift capacity 24 inches

behind lower link end W1

STV32, 36, 40 890 kg (1962 lbs)

Lower link end max. hydraulic liftin g capa ci ty...... .......W0

Implement weight........................................The implement's weight which can be put on the lower link : W1

Max. drawbar load.......................................W2

Trailer loading weight..................................The max. loading weight for trailer (without trailer's weight) : W3

1050 mm

(40.55 in.)

9.5 - 22 Farm

13.6 - 16 Turf

Actual figures

Max. drawbar load W2

Drawbar 500 kg (1102 lbs)

High-hitch 490.5 kg (1081 lbs)

1070 mm

(421.26 in.)

1055 mm

(415.35 in.)

1150 kg

(2535 lbs)

Trailer loading

weight W3 Max.

capacity

1500 kg (3300 lbs)

A Implement size may vary depending on soil operating conditions.

0000008013E

G-52

KiSC issued 04, 2006 A

1 ENGINE

CONTENTS

KiSC issued 04, 2006 A

1. LUBRICATING SYSTEM..................................................................................................1-M1

2. COOLING SYSTEM .........................................................................................................1-M2

3. FUEL SYSTEM.................................................................................................................1-M3

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

1. LUBRICATING SYSTEM

(1) Rocker Arm
(2) Oil Pressure Switch
(3) Rocker Arm Shaft
(4) Valve
(5) Governor 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) Piston
(16) Connecting Rod

A lubricating sy stem consists of an oil s trainer (9), oil pump (8), r elief valve (10), oil fil ter cartridge (11) and oil

pressure switch (2).

The oil pump su cks lubricating oil from the oil pan thro ugh the oil strain er and the oil flows d own to the oil filter
cartridge where it is further filtered. Then the oil is forced to crankshaft ( 7), connecting rods (16), idle gea r (6),
governor shaft (5), camshaft (14) and rocker arm shaft (3) to lubricate each part through the oil gallery.

0000005270E

1-M1

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

2. COOLING SYSTEM

Bottom bypass syst em is introduced in 03-M Series

for improving the cooling performance of the radiator.

While the temperature of coolant in the engine is low,
the thermostat is held closed and the coolant is allowed
to flow through the bypass pipe and to circulate in the
engine.

When the temperature exceeds the ther mostat val ve
opening level, the thermostat fully opens itself to
prevent the hot coolant from flowing through the bypass
into the engine.

In this way, the radiator can increase its cooling
performance.

(1) Thermostat (A) Thermostat Closed

(B) Thermostat Open

0000006293E

1-M2

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

3. FUEL SYSTEM

(1) Fuel Overflow Pipe (5) Injection Pump Air Vent (7) Fuel Filter a : Injected Fuel Flow
(2) Injection Nozzle P i pe ( 8) Fuel Feed Pump b : Retu r ned Fuel Flow
(3) Injection Pipe (6) Injection Pump (9) Fuel Filter Air Vent Pipe
(4) Fuel Tank

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 i s runni ng , fue l is fe d i nto the i nje ction pump (6) by the fu el fee d p ump (8) af ter pa ssin g through
the fuel filter (7). The fuel camshaft actuates the injection pump and force-feeds fuel to the injection nozzle (2) through
the injection pi pe (3). Fu el is then sprayed throug h the nozz le into the combustion c hamber. The fuel dischar ged
after lubricating and cooling the injection nozzle is returned to the fuel tank (4) automatically through the overflow pipe
(1).

0000005269E

1-M3

CONTENTS

KiSC issued 04, 2006 A

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

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

3. TIGHTNING TORQUES .................... ..... ............................................................ ............1-S10

4. CHECKING, DISASSEMBLING AND SERVICING......................................................1-S11

[1] CHECKING AND ADJUSTING....................................................................................1-S11

(1) Engine Body..........................................................................................................1-S11

(2) Lubricating System................................................................................................1-S14

(3) Cooling System.....................................................................................................1-S14

(4) Fuel System...........................................................................................................1-S17

[2] PREPARATION.............................................................................................................1-S19

(1) Separating Engine from Tractor............................................................................1-S19

[3] DISASSEMBLING AND ASSEMBLING.......................................................................1-S27

(1) Cylinder Head and Valves......................................... .... ..... ..... ..............................1-S27

(2) Timing Gears, Camshaft and Fuel Camshaft........................................................1-S31

(3) Piston and Connecting Rod...................................................................................1-S38

(4) Crankshaft.............................................................................................................1-S42

(5) Thermostat and Water Pump ................................................................................1-S45

[4] SERVICING...................................................................................................................1-S46

(1) Cylinder Head and Valves......................................... .... ..... ..... ..............................1-S46

(2) Timing Gears, Camshaft and Fuel Camshaft........................................................1-S52

(3) Piston and Connecting Rod...................................................................................1-S54

(4) Crankshaft.............................................................................................................1-S57

(5) Cylinder .................................................................................................................1-S61

(6) Oil Pump................................................................................................................1-S62

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

1. TROUBLESHOOTING

Symptom Probable Cause Solution

Engine Does Not Start A No fuel Replenish fuel

A Air in the fuel system Bleed G-33
A Water in the fuel system Change fuel and

repair or replace fuel
system

A Fuel pipe clogged Clean
A Fuel filter clogged Clean or change G-22
A Excessively high visc osity of fuel or engine oil

at low temperature

A Fuel with low cetane number Use specified

A Fuel leak due to loose in jection pipe retainin g

nut

A Incorrect injection timing Adjust 1-S17
A Fuel camshaft worn Replace 1-S37
A Injection nozzle clogged Clean 1-S18

Use specified fuel
or engine oil

fuel
Tighten retaining nut 1-S27

Reference

Page

G-8

G-8

(Starter Does Not
Run)

A Injection pump malfunctioning Replace 1-S31
A Seizure of crankshaft, camshaft, piston,

cylinder or bearing

A Compression leak from cylinder Replace head gasket,

A Improper valve timing Correct or replace

A Piston ring and cylinder worn Replace 1-S55, S61
A Excessive valve clearance Adjust 1-S13
A Battery discharged Charge G-25, 26
A Starter malfunctioning Repair or replace 9-S16
A Main switch malfunctioning Repair or replace 9-S8
A Safety switch (clutch pedal, HST) improperly

adjusted or defective

A Starter relay defe ctive Replace 9-S17
A PTO relay defective Replace 9-S18

Repair or replace

1-S11
tighten cylinder head
screw, glow plug and
nozzle holder

1-S36
timing gear

Repair or replace 9-S16, 17

A PTO clutch control switch engaged Disengage
A Fuse (30A, Starter) blown Replace G-34
A Wiring disconnected Connect

1-S1

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Symptom Probable Cause Solution

Engine Revolution Is
Not Smooth

Either White or Blue
Exhaust Gas Is
Observed

Either Black or Dark
Gray Exhaust Gas Is
Observed

Reference

Page

A Fuel filter clogged or dirty Change G-22
A Air cleaner clogged Clean or replace G-21
A Fuel leak due to loose in jection pipe retainin g

Tighten retaining nut 1-S27

nut

A Injection pump malfunctioning Replace 1-S31
A Incorrect nozzle injection pressure Adjust 1-S18
A Injection nozzle stuck or clogged Repair or replace 1-S18
A Governor malfunctioning Repair 1-S32
A Excessive engine oil Reduce to specified

G-13
level

A Piston ring and cylinder worn or stuck Repair or replace 1-S55, S61
A Incorrect injection timing Adjust 1-S17
A Deficient compression Adjust top clearance 1-S11
A Overload Loosen load
A Low grade fuel used Use specified fuel G-8
A Fuel filter clogged Replace G-22
A Air cleaner clogged Clean or replace G-21
A Deficient nozzle injection Repair or replace

1-S18
nozzle

Deficient Output A Incorrect injection timing Adjust 1-S17

A Engine's moving parts seem to be seized Repair or replace
A Uneven fuel injection Replace injection

1-S18
pump

A Deficient nozzle injection Repair or replace

1-S18
nozzle

A Compression leak Replace head gasket,

1-S11
tighten cylinder head
screw, glow plug and
nozzle holder

Excessive Lubricant
Oil Consumption

A Piston ring's gap facing the same direction Shift ring gap

direction

1-S40

A Oil ring worn or stuck Replace 1-S55, S56
A Piston ring groove worn Replace piston 1-S56
A Valve stem and valve guide worn Replace 1-S47
A Oil leaking due to defective seals or packing Replace

Fuel Mixed into
Lubricant Oil

A Injection pump's plunger worn Replace pump 1-S31
A Deficient nozzle injection Repair or replace

1-S18
nozzle

A Injection pump broken Replace 1-S31

1-S2

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Symptom Probable Cause Solution

Water Mixed into
Lubricant Oil

A Head gasket defective Replace 1-S29
A Cylinder block or cylinder head flawed Replace 1-S46

Reference

Low Oil Pressure A Engi ne oil insu ffi ci ent Replenish G-13

A Oil filter clogged Replace G-14
A Relief valve stuck with dirt Clean
A Relief valve spring weaken or broken Replace
A Excessive oil clearance of crankshaft bearing Replace 1-S59, S60
A Excessive oil clearance of crankpin bearing Replace 1-S58
A Excessive oil clearance of rocker arm Replace 1-S50
A Oil passage clogged Clean
A Different type of oil Use specified type of

G-8
oil

A Oil pump defective Repair or replace 1-S62

High Oil Pressure A Different type of oil Use specified type of

G-8
oil

A Relief valve defective Replace

Page

Engine Overheated A Engi ne oil insu ffi ci ent Replenish G-13

A Fan belt broken or elongated Replace or adjust 1-S14, S15
A Coolant insufficient Replenish G-8
A Radiator net and radiator fin clogged with dust Clean
A Inside of radiator corroded Clean or replace G-31
A Coolant flow route corroded Clean or replace G-31
A Radiator cap defective Replace 1-S15
A Overload running Loosen load
A Head gasket defective Replace 1-S29
A Incorrect injection timing Adjust 1-S17
A Unsuitable fuel used Use specified fuel G-8

0000007473E

1-S3

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

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)

Difference among
Cylinders

Top Clearance 0.55 to 0.70 mm

Valve Clearance (When Cold) 0.18 to 0.22 mm

Valve Seat Width (Intake) 2.12 mm

Width (Exhaust) 2.12 mm

Valve Seat Angle (Intake) 1.047 rad

Angle (Exhaust) 0.785 rad

Valve Face Angle (Intake) 1.047 rad

3.53 to 4.02 MPa /
290 (rpm)

36 to 41 /

290 (rpm)

512 to 583 psi /

290 (rpm)

0.0217 to 0.0276 in.

0.0071 to 0.0087 in.

0.0835 in.

0.0835 in.

60

45

60

2.55 MPa /

290 (rpm)

26 /

290 (rpm)

370 psi /

290 (rpm)

10 % or less

Angle (Exhaust) 0.785 rad

45

Valve Stem to Valve Guide Clearance 0.040 to 0.070 mm

0.00157 to 0.00276 in.

Valve Stem
(O.D.)

Valve Guide
(I.D.)

Valve Recessing Protrusion 0.05 mm

Recessing 0.15 mm

7.960 to 7.975 mm

0.31339 to 0.31398 in.

8.015 to 8.030 mm

0.31555 to 0.31614 in.

0.0020 in.

0.0059 in.

0.1 mm

0.0039 in.

0.4 mm

0.0157 in.

1-S4

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Item Factory Specification Allowable Limit

Valve Timing (Intake Valve) D1503-M (Open) 0.14 rad (8 )

before T.D.C.

D1503-M (Close) 0.35 rad (20 )

after B.D.C.

D1703-M (Open)
D1803-M

D1703-M (Close)
D1803-M

0.21 rad (12 )
before T.D.C.

0.63 rad (36 )

after B.D.C.

Valve Timing (Exhaust Valve) D1503-M (Open) 1.0 5 rad (60 )

before B.D.C.

D1503-M (Close) 0.21 rad (12 )

after T.D.C.

D1703-M (Open)
D1803-M

D1703-M (Close)
D1803-M

1.05 rad (60 )
before B.D.C.

0.21 rad (12 )

after T.D.C.

Valve Spring Free Length 41.7 to 42.2 mm

1.6417 to 1.6614 in.

Setting Load /
Setting Length

117.6 N / 35.0 mm

12.0 kgf / 35.0 mm

26.4 lbs / 1.3780 in.

Tilt 1.0 mm

Rocker Arm Shaft to Rocker Arm Clearance 0.016 to 0.045 mm

0.00063 to 0.00177 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.

0.039 in.

0.1 mm

0.0039 in.

Rocker Arm Shaft
(O.D.)

Rocker Arm
(I.D.)

13.973 to 13.984 mm

0.55012 to 0.55055 in.

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 Clearance 0.020 to 0.062 mm

0.00079 to 0.00244 in.

0.07 mm

0.0028 in.

Tappet (O.D.) 23.959 to 23.980 mm

0.94327 to 0.94410 in.

Tappet Guide (I.D) 24.000 to 24.021 mm

0.94488 to 0.94571 in.

1-S5

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Item Factory Specification Allowable Limit

Timing Gear Crank Gear to Idle

Gear (Backlash)
Idle Gear to Cam

Gear (Backlash)
Idle Gear to

Injection Pump
Gear (Backlash)

Crank Gear to Oil
Pump Gear
(Backlash)

0.0415 to 0.1122 mm

0.00163 to 0.00442 in.

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.

Idle Gear Side Clearance 0.12 to 0.48 mm

0.0047 to 0.0189 in.

Idle Gear Shaft to Idle Gear Bushing Clearance 0.025 to 0.066 mm

0.00098 to 0.00260 in.

Idle Gear Shaft
(O.D.)

Idle Gear Bushing
(I.D.)

37.959 to 37.975 mm

1.49445 to 1.49508 in.

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.

0.15 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.

0.3 mm

0.0118 in.

Camshaft Alignment 0.01 mm

0.0004 in.

Camshaft Cam Height

(Intake / Exhaust)

Camshaft Journal to Cylinder Block Bore Clearance 0.050 to 0.091 mm

Camshaft Journal
(O.D.)

Cylinder Block Bore
(I.D.)

Piston Pin Bore I.D. 25.000 to 25.013 mm

Second Ring to Ring Groove Clearance 0.093 to 0.128 mm

Oil Ring to Ring Groove Clearance 0.020 to 0.060 mm

Top Ring D1503-M

(Ring Gap)
D1703-M

D1803-M
(Ring Gap)

33.90 mm

1.3346 in.

0.00197 to 0.00358 in.

39.934 to 39.950 mm

1.57221 to 1.57284 in.

40.000 to 40.025 mm

1.57480 to 1.57579 in.

0.98425 to 0.98476 in.

0.0037 to 0.0050 in.

0.0008 to 0.0021 in.

0.20 to 0.35 mm

0.0079 to 0.0138 in.

0.25 to 0.40 mm

0.0098 to 0.0157 in.

33.85 mm

1.3327 in.

0.15 mm

0.0059 in.

25.05 mm

0.9862 in.

0.2 mm

0.0079 in.

0.15 mm

0.0059 in.

1.25 mm

0.0492 in.

1.25 mm

0.0492 in.

Second Ring Ring Gap 0.30 to 0.45 mm

Oil Ring Ring Gap 0.25 to 0.45 mm

1-S6

0.0118 to 0.0177 in.

0.0098 to 0.0177 in.

1.25 mm

0.0492 in.

1.25 mm

0.0492 in.

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Item Factory Specification Allowable Limit

Connecting Rod Alignment 0.05 mm

0.0020 in.

Piston Pin to Small End Bushing Clearance 0.014 to 0.038 mm

0.00055 to 0.00150 in.

0.15 mm

0.0059 in.

Piston Pin (O.D.) 25.002 to 25.011 mm

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.

Crankshaft Journal to Crankshaft Bearing 1 Oil Clearance 0.040 to 0.118 mm

0.00157 to 0.00465 in.

Crankshaft Journal
(O.D.)

Crankshaft Bearing
1
(I.D.)

59.921 to 59.940 mm

2.35909 to 2.35984 in.

59.980 to 60.039 mm

2.36142 to 2.36374 in.

Crankshaft Journal to Crankshaft Bearing 2 Oil Clearance 0.040 to 0.104 mm

0.00157 to 0.00409 in.

Crankshaft Journal
(O.D.)

Crankshaft Bearing
2
(I.D.)

59.921 to 59.940 mm

2.35909 to 2.35984 in.

59.980 to 60.025 mm

2.36142 to 2.36374 in.

0.2 mm

0.0079 in.

0.2 mm

0.0079 in.

Crankpin to Crankpin Bearing Oil Clearance 0.025 to 0.087 mm

0.00098 to 0.00343 in.

Crankpin
(O.D.)

Crankpin Bearing
(I.D.)

46.959 to 46.975 mm

1.84878 to 1.84941 in.

47.000 to 47.046 mm

1.85039 to 1.85220 in.

Crankshaft Side Clearance 0.15 to 0.31 mm

0.0059 to 0.0122 in.

0.2 mm

0.0079 in.

0.5 mm

0.0197 in.

Crankshaft Sleeve Wear 0.1 mm

0.0039 in.

Cylinder Bore
[Standard]

Cylinder Bore
[Oversize]

D1503-M
(I.D.)

D1703-M
D1803-M
(I.D.)

D1503-M
(I.D.)

D1703-M
D1803-M
(I.D.)

83.000 to 83.022 mm

3.26772 to 3.26858 in.

87.000 to 87.022 mm

3.42519 to 3.42606 in.

83.250 to 83.272 mm

3.27756 to 3.27843 in.

87.250 to 87.272 mm

3.43503 to 3.43590 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.

0000007474E

1-S7

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

LUBRICATING SYSTEM

Item Factory Specification Allowable Limit

Engine Oil Pressure At Idle Speed More than 98 kPa

1.0
14 psi

At Rated Speed 294 to 441 kPa

3.0 to 4.5

42.7 to 64.0 psi

Engine Oil Pressure Switch Working Pressure 49 kPa

0.5

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.

COOLING SYSTEM

Item Factory Specification Allowable Limit

49 kPa

0.5
7 psi

245 kPa

2.5

35.6 psi

0.2 mm

0.0079 in.

0.25 mm

0.0098 in.

0.2 mm

0.0079 in.

0000005274E

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
(At Beginning)

Valve Opening
Temperature
(Opened Completely)

69.5 to 72.5

157.1 to 162.5

85

185

Radiator Water Tightness No leaks at

137 kPa

1.4
20 psi

Radiator Cap Pressure Falling Time more than 10 seconds

for pressure fall

from 88 to 59 kPa

(from 0.9 to 0.6

from 13 to 9 psi)

0000005275E

1-S8

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

FUEL SYSTEM

Item Factory Specification Allowable Limit

Injection Pump Injection Timing 0.297 to 0.331 rad

(17 to 19 )

before T.D.C.

Injection Nozzle Injection Pressure 13.73 to 14.71 MPa

140 to 150

1991 to 2133 psi

Injection Nozzle Valve Seat Valve Seat

Tightness

When the pressure is

12.75 MPa

(130 , 1849 psi),

the valve seat must be

fuel tightness.

0000005276E

1-S9

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

3. TIGHTNING 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-9.)

Item ft-lbs

Steering wheel mounting nut 48.1 to 55.9 4.9 to 5.7 35.4 to 41.2
Delivery hose RH retaining nut 24.5 to 29.4 2.5 to 3.0 18.1 to 21.7
Delivery hose LH retaining nut 24.5 to 29.4 2.5 to 3.0 18.1 to 21.7
Delivery hose retaining nut 34.3 to 44.1 3.5 to 4.5 25.3 to 32.5
Delivery hose joint screw 49.0 to 58.8 5.0 to 6.0 36.2 to 43.4
Bi-speed delivery pipe joint screw 34.3 to 39.2 3.5 to 4.0 25.3 to 28.9
Bi-speed delivery pipe retaining nut 29.4 to 49.0 3.0 to 5.0 21.7 to 36.2
Engine mounting screw, bolt and nut (M10) 48.1 to 55.9 4.9 to 5.7 35.5 to 41.2
Engine mounting nut (M12) 77.5 to 90.2 7.9 to 9.2 57.2 to 66.5
Clutch mounting screw 23.5 to 27.5 2.4 to 2.8 17.4 to 20.2
Cylinder head cover screw 6.9 to 11.3 0.7 to 1.15 5.1 to 8.32
*Cylinder head screw 93.1 to 98.0 9.5 to 10.0 68.7 to 72.3
*Main bearing case screw 1 46.1 to 50.9 4.7 to 5.2 34.0 to 37.6
*Main bearing case screw 2 68.6 to 73.5 7.0 to 7.5 50.6 to 54.2
*Flywheel screw 98.0 to 107.8 10.0 to 11.0 72.3 to 79.5
*Connecting rod screw 44.1 to 49.0 4.5 to 5.0 32.5 to 36.2
*Rocker arm bracket screw 23.5 to 27.5 2.4 to 2.8 17.4 to 20.3
*Idle gear shaft screw 23.5 to 27.5 2.4 to 2.8 17.4 to 20.3
Fan drive pulley mounting nut 137.3 to 156.9 14.0 to 16.0 101.3 to 115.7
*Bearing case cover mounting screw 23.5 to 27.5 2.4 to 2.8 17.4 to 20.3
Glow plugs 19.6 to 24.5 2.0 to 2.5 14.5 to 18.1
Nozzle holder assembly 49.0 to 68.6 5.0 to 7.0 36.2 to 50.6
Oil pressure switch 14.7 to 19.6 1.5 to 2.0 10.8 to 14.5
Injection pipe retaining nut 24.5 to 34.3 2.5 to 3.5 18.1 to 25.3
Overflow pipe assembly retaining nut 19.6 to 24.5 2.0 to 2.5 14.5 to 18.1
Camshaft set bolt 23.5 to 27.5 2.4 to 2.8 17.4 to 20.3
Hi-idling body 44.1 to 49.0 4.5 to 5.0 32.5 to 36.2

A For "*" marked screws, bolts and nuts on the table, apply engine oil to their threads and seats before

tightening.

A The letter "M" in Size x Pitch means that the scr ew, bolt or nut d imension stands for met ric. The size is

the nominal outside diameter in mm of the threads. The pitch is the nominal distance in mm between
two threads.

0000007512E

1-S10

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

4. CHECKING, DISASSEMBLING AND SERVICING

[1] CHECKING AND ADJUSTING

(1) Engine Body

Compression Pressure

1. Run the engine until it is warmed up.

2. Stop the engine and disconnect the 2P connector from the
stop solenoid in order to inject fuel.

3. Remove the air cleaner, the muffler and all injection nozzles.

4. Set a compression tester (Code No. 07909-30208) with the
adaptor to the nozzle hole.

5. Keep the engine stop lever at "Stop Position".

6. While cranking the engine with the starter, measure the
compression pressure.

7. Repeat steps 4 through 6 for each cylinder.

8. If the measurement is bel ow the all owa ble limit, apply a small
amount of oil to the cy linder wall thro ugh the nozz le ho le an d
measure the compression pressure again.

9. If the compression pressure is still less than the allowable limit,
check the top clearance, valve and cy li nde r head.

10.If the compression pressure increases after applying oil, check
the cylinder wall and piston rings.

A Check the compression pressure with the specified valve

clearance.

A Always use a fully charged battery for performing this

test.

A Variances in cylinder compression values should be

under 10 %.

Factory spec.

Compression pressure

Allowable limit

3.53 to 4.02 MPa
36 to 41
512 to 583 psi

2.55 MPa
26
370 psi

0000005278E

1-S11

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Top Clearance

1. Remove the cylinder head.

2. Move the piston and stick a strip of fuse on the piston head at
three positions with grease.

3. Lower the pisto n and install the cylind er head. (Use a new
cylinder head gasket and tighten with a specified tightening
torque.)

4. Turn the flywheel until the piston passes through the T.D.C..

5. Remove the cylinder hea d and measure the thickness of the
fuses.

6. If the measurement is not within the factory specifications,
check the oil clearance between the crankpin and bearing and
between the piston pin and bushing.

A After checking the top clearance, be sure to assemble the

cylinder head with a new cylinder head gasket.

Top clearance Factory spec.

0.55 to 0.70 mm

0.0217 to 0.0276 in.

Tightening torque Cylinder head screws

(1) Piston (2) Fuse

93.1 to 98.0

9.5 to 10.0

68.7 to 72.3 ft-lbs

0000005280E

1-S12

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Valve Clearance

A The valve clearance must be checked and adjusted when

engine is cold.

1. Remove the head cover.

2. Remove the cap of the timing window (4) on the housing under
the right step.

3. Align the "1TC" mark line (3) on the flywheel and projection (2)
on the housing so that the No. 1 piston comes to compression
or overlap top dead center.

4. Check the following valve clearance (1) marked with " " using
a feeler gauge.

5. If the clearance is not within the factory specific ations, adj ust
with the adjusting screw.

A The "TC" marking line on the flywheel is just for No. 1

cylinder. There is no "TC" marking for the other
cylinders.

A No. 1 piston comes to the top dead center position when

the "TC" marking is aligned with the projection (2) in the
window on clutch housing. Turn the flywheel 0.26 rad
(15 ) clockwise and counter clock wise to see if the piston
is at the compression top dead center or the overlap
position. Now referring to the table below, readjust the
valve clearance (1). (The pist on is at t he top dead ce nter
when both the IN. and EX. valves do not mov ie; it is at the
overlap position when both the valves move.)

A Finally turn the flywheel 6.28 rad (360 ) and align the "TC"

marking and the projection (2) perfectly. Adjust all the
other valve clearance as required.

A After turning the flywheel counterclockwise twice or three

times, recheck the valve clearance (1).

A After adjusting the valv e clearance (1), fir mly tighten the

lock nut of the adjusting screw.

Valve arrangement

Adjustable cylinder
and location of piston

IN. EX.

No.1

When No. 1 piston is

compression top dead center

When No. 1 piston is overlap

position

(1) Valve Clearance (3) TC Mark Line
(2) Projection (4) Timing Window

1-S13

No.2
No.3
No.1
No.2
No.3

-

--

--

-

-

0000007475E

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

(2) Lubricating System

Engine Oil Pressure

1. Remove the engine oil pressure switch, and set an oil
pressure tester (Code No. 07916-32032). (Adaptor screw size
: PT 1/8)

2. Start the engine. Af ter wa rming up , me as ur e th e o il pr es sur e
of both idling and rated speeds.

3. If the oil pressure is l ess than the allowable limit, check the
following.

A Engine oil insufficient.
A Oil pump defective
A Oil strainer clogged
A Oil filter cartridge clogged
A Oil gallery clogged
A Excessive oil clearance
A Foreign matter in the relief valve

Factory
spec.

At idle
speed

Allowable
limit

Engine oil pressure

Factory
spec.

At rated
speed

Allowable
limit

More than 98 kPa

1.0
14 psi

49 kPa

0.5
7 psi

294 to 441 kPa

3.0 to 4.5

42.7 to 64.0 psi
245 kPa

2.5

35.6 psi

(3) Cooling System

(When reassembling)

A After checking the engi ne oil pressure, tighte n the engine oil

pressure switch to the specified torque.

14.7 to 19.6

Tightening torque Oil pressure switch

1.5 to 2.0

10.8 to 14.5 ft-lbs

0000005283E

Fan Belt Tension

1. Measure the deflection (A), depressing the belt halfway
between the fan drive pulley and alternator pulley at specified
force (98 N, 10 kgf, 22 Ibs).

2. If the measurement is not within the factory specifications,
loosen the alternator mounting screws and relocate the
alternator to adjust.

Deflection (A) Factory spec.

(A) Deflection

7 to 9 mm

0.28 to 0.35 in.

0000004277E

1-S14

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Fan Belt Damage and Wear

1. Check the fan belt for damage.

2. If the fan belt is damaged, replace it.

3. Check if the fan belt is worn and sunk in the pulley groove.

4. If the fan belt is nearly worn out and de epl y sunk in the pull ey
groove, replace it.

(A) Good (B) Bad

0000000920E

Radiator Cap Air Leakage

A When removing the radiator cap, wait at least ten minutes

after the engine has stopped and cooled down.
Otherwise, hot water way gush out, scalding nearby
people.

1. Set a radiator tester (Code No. 07909-31551) and an adapter
(BANZAI Code No. RCT-2A-30S) on the radiator cap.

2. Apply the specified pressure 88 kPa (0.9 , 13 psi), and
measure the time for the pressure to fall to 59 kPa (0.6

, 9 psi).

3. If the measurement is less than the factory specification,
replace the radiator cap.

More than 10 seconds for

Pressure falling time Factory spec.

pressure fall from
88 to 59 kPa
(from 0.9 to 0.6
from 13 to 9 psi)

0000005286E

1-S15

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Radiator Water Leakage

1. Pour a specified amount of water into the radiator.

2. Set a radiator tester (Code No. 07909-31551) with an adaptor
(BANZAI Code No. RCT-2A-30S) and raise the water
pressure to the specified pressure.

3. Check the radiator for water leaks.

4. For water leak from the pinhol e, replac e the radiato r or repa ir
with the radiator cement. When water leak is excessive,
replace the radiator.

Radiator water leakage
test pressure

Factory spec.

No leaks at 137 kPa

1.4
20 psi

0000005287E

Thermostat Valve Opening Temperature

1. Suspend the thermost at in the water by a string with its end
inserted between the valve and seat.

2. Heating the water gradual ly, read the temperature when the
valve opens and leaves the string.

3. Continue heating a nd read the temperature when the val ve
opens approx. 6 mm (0.236 in.).

4. If the measurement is not within the factory specifications,
replace the thermostat.

Thermostat's valve
opening temperature

Temperature at which
thermostat completely
opens

Factory spec.

Factory spec.

69.5 to 72.5

157.1 to 162.5

85
185

0000005285E

1-S16

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

(4) Fuel System

Injection Timing

1. Remove the stop solenoid.

2. Remove the injection pipes and nozzle.

3. Remove the cap of the timing window (1) on the housing under
the right step.

4. Set the speed control lever to maximum fuel discharge
position.

5. Turn the flywheel countercloc kwise (f acing the flyw heel) until
the fuel fills up to the hole of the de livery val ve holder ( 2) for
1st cylinder.

6. Turn the flywheel further and stop turning when the fuel begins
to flow over, to get the present injection timing.

7. (The flywheel has mark 1TC an d four lines indicating every

0.087 rad (5 ) of crank angle from 0.175 rad (10 ) to 0.436
rad (25 ) before mark 1TC) Calculate the angle which the
center of the window points out.

8. If the calculation differs from specified injection timing,
change, add or remove the shim (6) to adju st.

Injection timing Factory spec.

0.297 to 0.331 rad (17 to
19 ) before T.D.C.

A The sealant is applied to both sides of the soft metal

gasket shim. The liquid gasket is not required for
assembling.

A Shims are available in thickness of 0.2 0 mm (0.0079 in.),

0.25 mm (0.0098 in.) and 0.30 mm (0.0118 in.). Combine
these shims for adjustments.

A Injection timing delays or advances by approx. 0.0087 rad

(0.5 deg), when the thickness of the shim increased or
decreased by 0.05 mm (0.002 in.).

A In disassembling and replacing, be sure to use the same

number of new shims with the same thickness.

(1) Timing Window (4) One-hole:
(2) Delivery Valve Holder 0.25 mm (0.0098 in.)
(3) Two-holes: (5) Without hole:

0.20 mm (0.0079 in.) 0.30 mm (0.0118 in.)
(6) Soft Metal Gasket Shim

0000007476E

1-S17

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

A Check the injection pressure and condition after confirming that there is nobody standing in the

direction the fume goes.

A If the fume from the nozzle directly contacts the human body, cells may be destroyed and blood

poisoning may be caused.

0000000932E

Nozzle Spraying Condition

1. Set the injection nozzle to a nozzle tester, and check the
nozzle spraying condition.

2. If the spraying condition is defective, replace the nozzle piece.

(a) Good (b) B ad

0000004880E

Fuel Injection Pressure

1. Set the injection nozzle to a nozzle tester.

2. Slowly move the tester handle to measure the pressure at
which fuel begins jetting out from the nozzle.

3. If the measurement is not within the factory specifications,
replace the adjusting washer (1) in the nozzle holder to adjust
it.

Fuel injection pressure Factory spec.

13.73 to 14.71 MPa
140 to 150
1991 to 2134 psi

(Reference)

A Pressure variation with 0.01 mm (0.0004 in.) difference of

adjusting washer thickness.
Approx. 235 kPa (2.4 , 34 psi)

(1) Adjusting Washer

0000004881E

1-S18

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Valve Seat Tightness

1. Set the injection nozzle to a nozzle tester.

2. Raise the fuel pressure, and keep at 12.75 MPa (130 ,
1849 psi) for 10 seconds.

3. If any fuel leak is found, replace the nozzle piece.

No fuel leak at

Injection pressure Factory spec.

12.75 MPa
130
1849 psi

0000004882E

[2] PREPARATION

(1) Separating Engine from Tractor

Draining Coolant

A 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 radiator cap (1). The radiator cap (1) must be
removed to completely drain the coolant.

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

Coolant capacity
(with recovery tank)

6.1 L

6.4 U.S.qts.

5.4 Imp.qts.

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

0000007477E

Draining Engine Oil

1. Place an oil pan underneath the engine.

2. To drain the oil, remove th e both dr ain plug ( 1) at the b ottom
of the engine and drain the oil completely.

3. Screw in the both drain plug (1).

(When reassembling)

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

A When using an oil of different manufacture or viscosity

from the previous one, remove all of the old oil.

A Never mix two different types of oil.
A Use the proper SAE Engine Oil according to ambient

temperatures.

A Refer to "LUBRICANTS, FUEL AND COOLANT" (See

page G-8.)

Engine Oil Capacity

6.7 L

7.1 U.S.qts

5.9 Imp.qts

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

0000007478E

1-S19

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Draining Transmission Fluid

1. Place oil pan unde rneath the transm ission case, an d remov e
the drain plugs (1).

2. Drain the transmission fluid.

3. Reinstall the drain plug (1).

(When reassembling)

A Fill new oil from filling port after removing the filling plug (2) up

to the upper notch on the dipstick (3).

A After running the engine for few minutes, stop it and check the

oil level again, if low, add oil prescribed level

A 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-8.).

A Never work the tractor immediately after changing the

transmission oil. Keeping the engine at medium speed
for a few minutes to prevents dama ge to the transmission.

A Do not mix different blands oil together.

Transmission fluid Capacity

22 L

5.81 U.S.qts.

4.84 Imp.qts.

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

0000007479E

Hood, Side Cover and Battery Cord

1. Open the hood (1) and remove the front grille (3).

2. Disconnect the battery negative cable (2).

3. Disconnect the head light connectors and remove the side
covers (4) and hood (1).

(When reassembling)

A When disconnecting the battery cords, disconnect the

grounding cord first. When connecting, positive cord
first.

(1) Hood (3) Front Grille
(2) Battery Negative Cable (4) Side Cover

0000007480E

1-S20

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Steering Wheel

1. Remove the covers (3).

2. Remove the steering wheel cap.

3. Remove the steerin g wheel moun ting n ut (1 ) and r emove the
steering wheel (2) with a steering wheel puller (Code No.
07916-51090).

(When reassembling)

Tightening torque

(1) Nut (3) Cover
(2) Steering Wheel

Steering wheel
mounting nut

48.1 to 55.9

4.9 to 5.7

35.4 to 41.2 ft-lbs

0000007481E

Meter Panel and Panel Under Cover

1. Open the meter panel (1) and disconnect the meter panel
connector (2) and hour-meter cable (3). Then remove the
meter panel.

2. Remove the sponge.

3. Disconnect the combination switch connector (4), main switch
connector (5), h azard swit ch co nnector (7) and po sition l amp
switch connector (8).

4. Remove the panel under cover (6)

(1) Meter Panel (5) Main Switch Connector
(2) Meter Panel Connector (6) Panel Under Cover
(3) Hour-meter Cable (7) Hazar d Switch Connector
(4) Combination Switch Connector (8) Position Lamp Switch

Connector

0000007482E

Panel Under Frame

1. Remove the foot cover (2).

2. Remove the screws (3) an d nuts (4), and pull up the panel
under frame (1).

(When reassembling)

A When reassembling the panel under frame, tighten the two

nuts (4) for insulation rubber first.

(1) Panel Under Frame (3) Screw
(2) Foot Cover (4) Nut

0000007483E

1-S21

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Wiring Harness (Left Side)

1. Disconnect the connector from the horn (1).

2. Disconnect the connectors from the relays (2).

3. Separate the fuse box (3) from the stay.

4. Disconnect the battery positive cable from the battery terminal.

5. Disconnect the con nector from the front wheel turning angle
sensor, alternator (4), starter (7) and oil switch (5).

6. Disconnect the earth terminal (8).

7. Loosen the clamp of the terminal (6) for cabin.

(1) Horn (5) Oil Switch
(2) Relay (6) Terminal for Cabin
(3) Fuse Box (7) Starter
(4) Alternator (8) Earth Terminal

0000007484E

Wiring Harness (Right Side)

1. Remove the air clean er and disconnect the glow plug ca ble
(1).

2. Disconnect the 1P connector (2) from the coolant temperature
sensor.

3. Disconnect the connector from the engine stop solenoid.

(1) Glow Plug Cable (2) 1P Connector

0000007485E

1-S22

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Power Steering Hoses and Accelerator WIre (Right Side)

1. Remove the cushion rubber (4) noting not to damage it.

2. Disconnect the accelerator wire (5) from the engine.

3. Remove the power steering delivery hose (6).

A Do not lose the check valve a nd spring in the pump side

joint.

4. Disconnect the delivery hose LH (1) and delivery hose RH (2)
from the steering controller.

5. Loosen the clamp and disconne ct the suction hose (3) from
the hydraulic pump.

(When reassembling)

A Connect the delivery hose RH (2) to the LT port (9).
A Connect the delivery hose LH (1) to the RT port (8).
A Assemble the delivery hose (6), delivery hose LH (1) and

delivery hose RH so that each hos e becomes parallel to the
hose joint (11).

A Be sure to check the hose joints do not interfere in other joints.

Tightening torque

Tightening torque

Tightening torque

Tightening torque

Delivery hose RH (2)
retaining nut

Delivery hose LH (1)
retaining nut

Delivery hose (6)
retaining nut
(Controller side)

Delivery hose (6) joint
screw
(Pump side)

24.5 to 29.4

2.5 to 3.0

18.1 to 21.7 ft-lbs

24.5 to 29.4

2.5 to 3.0

18.1 to 21.7 ft-lbs

34.3 to 44.1

3.5 to 4.5

25.3 to 32.5 ft-lbs
49 to 58.8

5.0 to 6.0

36.2 to 43.4 ft-lbs

(1) Delivery Hose LH (9) LT Port
(2) Delivery Hose RH (10) Charge Hose
(3) Suction Hose (11) Hose Joint (OUT Port)
(4) Cushion Rubber
(5) Accelerator Wi re
(6) Delivery Hose [A] Viewed from Bottom Side
(7) Steering Controller F: Front Side
(8) RT Port R: Rear Side

0000007486E

1-S23

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Hydraulic Pipe and Fuel Pipe (Right Side)

1. Disconnect the fuel hose (3) from the fuel filter to drain fuel.

2. Disconnect the fuel return hoses from the fuel tank.

3. Remove the retaining screws (1) and separate the 3P
hydraulic delivery pipe (2) from the hydraulic pump.

4. Disconnect the bi -speed delivery pipe (6) fr om the hydraulic
pump.

5. Remove the retaining screw (4) of the oil cooler pipe and
loosen the clamp (5) of the joint hose.

Bi-speed delivery pipe
joint screw (Pump side)

Tightening torque

(1) Retaining Screw (4) Retaining Screw
(2) 3P Hydraulic Delivery Pipe (5) Clamp
(3) Fuel Hose (6) Bi-speed Delivery Pipe

Bi-speed delivery pipe
retaining nut (Bi-speed
valve side)

34.3 to 39.2

3.5 to 4.0

25.3 to 28.9 ft-lbs
29 to 49

3.0 to 5.0

21.7 to 36.2 ft-lbs

0000007490E

Propeller Shaft

1. Loosen the clamp screws (1) and slide the propeller shaft
cover (2).

2. Tap out the spring pin (3) and then slide the coupling (4).

3. Remove the propeller shaft with the cover.

(When reassembling)

A Apply grease to the spline portion of the propel ler shaft and

couplings.

A When inserting the spring pins (3), face their splits in the

direction parallel to the propeller shaft.

A Tighten the clamp screws (1) upwar d from the bottom side.

(1) Clamp Screws (3) Spring Pin
(2) Propeller Shaft Cover (4) Coupling

0000007491E

1-S24

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Separating the Engine from Clutch Housing

1. Place the disassemblin g stand under the clutch housi ng and
engine oil pan.

2. Remove the engine mounting screws, bolts and nuts, and
separate the engine from the clutch housing.

(When reassembling)

A Apply liquid gaske t (Thre e Bond 1 208D or equivale nt) to j oint

face of the engine and clutch housing.

Engine mounting screw,
bolt and nut (M10)

Tightening torque

Engine mounting nut
(M12)

(1) Mounting Nut (M12)

48.1 to 55.9

4.9 to 5.7

35.5 to 41.2 ft-lbs

77.5 to 90.2

7.9 to 9.2

57.2 to 66.5 ft-lbs

0000007492E

Clutch Assembly

1. Remove the clutch mounting screws and remove the clutch
assembly (1) from the flywheel.

(When reassembling)

A Direct the shorter end of the clutch disc boss toward the

flywheel.

A Apply molybdenum disulphide (Three Bond 1901 or

equivalent) to the splines of clutch disc boss.

A Screws in two reamer screws (3) in the reamer screw holes.
A After tighten the reamer screws, tighten the other general

screws.

A Align the center of clutch disc and flywheel by inserting

the clutch center tool (2).

A Do not allow grease and oil on the clutch disc facing.
A The reamer screw hole on the clutch cover (7) is in the

next of the 5 mm (0.2 in.) dia. hole (4).

A The shape of the reamer screw hole (8) on the flywheel is

different from other screw holes.

Tightening torque Clutch mounting screw

23.5 to 27.5

2.4 to 2.8

17.4 to 20.2 ft-lbs

(1) Clutch Assembly (5) Flywheel
(2) Clutch Center Tool (6) Clutch Disc
(3) Reamer Screw (7) Clutch Cover
(4) 5 mm dia. Hole (8) Screw Hole for Reamer Screw

0000007493E

1-S25

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Separating Front Axle Assembly and Outer Parts

1. Disconnect the radiator hoses (1), (5).

2. Remove the muffler (3).

3. Remove the recovery tank (6).

4. Remove the starter motor (4) and alternator (2).

5. Remove the fuel filter (9).

6. Remove the regulator valve (7) and hydraulic pump (8).

7. Remove the engine mounting screws and separate the front
axle assembly from engine.

(1) Radiator Hose (6) Recovery Tank
(2) Alternator (7) Regulator Valve
(3) Muffler (8) Hydraulic Pump
(4) Starter Motor (9) Fuel Filter
(5) Radiator Hose

0000007494E

1-S26

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

[3] DISASSEMBLING AND ASSEMBLING

(1) Cylinder Head and Valves

Cylinder Head Cover

1. Remove the lead (1).

2. Remove the breather hose (2).

3. Remove the head cover screws (3).

4. Remove the cylinder head cover (4).

(When reassembling)

A Check to see if the cylinder head cover gasket is not defective.

Tightening torque

(1) Lead (5) Cylinder Head Cover Gasket
(2) Breather Hose (6) Breather Valve
(3) Head Cover Screw (7) Plate
(4) Cylinder Head Cover

Cylinder head cover
screw

6.9 to 11.3

0.7 to 1.15

5.1 to 8.32 ft-lbs

0000006432E

Injection Pi pes

1. Loosen the screws on the pipe clamps (1).

2. Detach the injection pipes (2).

(When reassembling)

A Blow out dust inside the pipes.

Tightening torque

(1) Pipe Clamp (2) Injection Pipe

Injection pipe retaining
nut

1-S27

24.5 to 34.3

2.5 to 3.5

18.1 to 25.3 ft-lbs

0000006433E

STV32 · STV36 · STV40, WSM ENGINE

KiSC issued 04, 2006 A

Nozzle Holder Assembly and Glow Plug

1. Remove the overflow pipe assembly (5).

2. Remove the nozzle holder assemblies (2) using a 21 mm deep
socket wrench.

3. Remove the copper gasket (3) and heat seal (4).

4. Remove the glow plugs (1).

(When reassembling)

A Replace the copper gasket and heat seal with new one.

Nozzle holder assembly

Tightening torque

(1) Glow Plug (4) Heat Seal
(2) Nozzle Holder Assembly (5) Overflow Pipe Assembly
(3) Copper Gasket

Overflow pipe assembly
retaining nut

Glow plug

49.0 to 68.6

5.0 to 7.0

36.2 to 50.6 ft-lbs

19.6 to 24.5

2.0 to 2.5

14.5 to 18.1 ft-lbs

19.6 to 24.5

2.0 to 2.5

14.5 to 18.1 ft-lbs

0000007495E

Nozzle Heat Seal Service Removal Procedure

A Use a plus (phillips head) screw driver (1) that has a Dia.

which is bigger than the heat seal hole (Approx. 6 mm)
1/4 in.

1. Drove screw driver (1) lightly into the heat seal hole.

2. Turn screw driver three or four times each way.

3. While turning the screw driver, slowly pull the heat seal (4) out
together with the copper gasket (3).

4. If the heat seal drops, repeat the above procedure.

(When reassembling)

A Heat seal and copper gasket must be changed when the

injection nozzle is removed for cleaning or for service.

(1) Plus Screw Driver (3) Copper Gasket
(2) Nozzle Holder (4) Heat Seal

0000005338E

1-S28