Kubota stv36 tractor service repair manual

STV32,STV36,STV40
WORKSHOP MANUAL
TRACTOR
KiSC issued 04, 2006 A

STV32 · STV36 · STV40, WSM SPECIFICATIONS
7
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)
Engine
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 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 )]
Capacities
Fuel tank 29.5 L (7.79 U.S.gals, 6.49 Imp.gals)
Engine crankcase
(with filter)
6.7 L (7.1 U.S.qts, 5.9 Imp.qts)
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
Farm:
6 - 12
Turf:
24 x 8.5 - 14
Farm:
6 - 12
Turf:
24 x 8.5 - 14
Farm:
6 - 12
Turf:
24 x 8.5 - 14
Rear 9.5 - 22 13.6 - 16 9.5 - 22 13.6 - 16 9.5 - 22 13.6 - 16
Dimensions
Overall length
(with 3P)
2860 mm (112.6 in.)
Overall width
(min. tread)
1220 mm
(48.0 in.)
1310 mm
(51.6 in.)
1220 mm
(48.0 in.)
1310 mm
(51.6 in.)
1220 mm
(48.0 in.)
1310 mm
(51.6 in.)
Overall height
(with ROPS)
2350 mm
(92.5 in.)
2340 mm
(92.1 in.)
2350 mm
(92.5 in.)
2340 mm
(92.1 in.)
2350 mm
(92.5 in.)
2340 mm
(92.1 in.)
Wheel base 1610 mm (63.4 in.)
Minimum ground
clearance
235 mm
(9.3 in.)
225 mm
(18.9 in.)
235 mm
(9.3 in.)
225 mm
(18.9 in.)
235 mm
(9.3 in.)
225 mm
(18.9 in.)
Tread
Front 1030 mm (40.6 in.)
Rear
950 mm
(37.4 in.)
1070 mm
(42.1 in.)
965 mm
(38.0 in.)
1055 mm
(41.5 in.)
950 mm
(37.4 in.)
1070 mm
(42.1 in.)
965 mm
(38.0 in.)
1055 mm
(41.5 in.)
950 mm
(37.4 in.)
1070 mm
(42.1 in.)
965 mm
(38.0 in.)
1055 mm
(41.5 in.)

STV32 · STV36 · STV40, WSM SPECIFICATIONS
8
Note : * Manufacture's estimate.
The company reserves the right to change the specifications without notice.
Model STV32 STV36 STV40
Weight (with ROPS)
975 kg
(2150 Ibs)
995 kg
(2194 Ibs)
975 kg
(2150 Ibs)
995 kg
(2194 Ibs)
975 kg
(2150 Ibs)
995 kg
(2194 Ibs)
Travelling
system
Clutch Dry single plate
Steering Hydrostatic power steering
Transmission Main-hydrostatic transmission, range gear shift (3 forward and 3 reverse)
Brake Wet disk type
Min. turning radius
(with bi-speed turn)
2.2 m (7.2 feet) with brake, 2.5 m (8.2 feet) without brake
Differential Bevel gear
Hydraulic
system
Hydraulic control
system
Position control
Pump capacity
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)
Three point hitch SAE Category 1
Max. lift
force
At lift
points
1150 kg (2535 Ibs)
24 in.
behind lift
points
890 kg (1962 Ibs)
PTO
system
Rear
PTO shaft SAE 1-3/8, 6 splines
Revolution 2 speeds (540 rpm at 2670 engine rpm, 800 rpm at 2717 engine rpm)
Mid
PTO shaft U.S.A. No.5 (KUBOTA 10-tooth) involute spline
Revolution 1 speed (2500 rpm at 2734 engine rpm)
0000004797E

STV32 · STV36 · STV40, WSM TRAVELLING SPEEDS
9
TRAVELLING SPEEDS
The company reserves the right to change the specifications without notice
Model STV32, 36, 40
Tire Size (Rear) 9.5 - 22 13.6 - 16
Range gear shift lever km/h km/h
Forward
1 (Low) 0 to 6.6 0 to 6.5
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
Reverse
1 (Low) 0 to 4.8 0 to 4.7
2 (Middle) 0 to 9.2 0 to 9.2
3 (High) 0 to 20.6 0 to 20.4
Max. Speed (at 2850 engine rpm) 21.7 21.6
0000008023E

STV32 · STV36 · STV40, WSM DIMENSIONS
10
DIMENSIONS
0000006808E

CONTENTS
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
[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
G-1
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-2
2. GENERAL PRECAUTION
A During disassembly, carefully arrange removed parts in a
clean area to prevent confusion later. 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 before assembling.
See the figure left side.
A When reassembling external snap rings or internal snap rings,
they must be positioned so that sharp edge faces against the
direction from which a force is applied. See the figure left side.
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 the hydraulic system, use only specified
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-3
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] WIRING
A Securely tighten wiring terminals.
A Do not let wiring contact dangerous part.
A Securely insert grommet.
(1) Negative Terminal (2) Positive Terminal
0000000613E
(1) Correct (2) Incorrect
(Securely Tighten) (Loosening Leads to Faulty
Contact)
0000000614E
(1) Dangerous Part (3) Wiring (Correct)
(2) Wiring (Incorrect) (4) Dangerous Part
0000000615E
(1) Grommet (A) Correct
(B) Incorrect
0000000616E

G-4
A Repair or change torn or aged wiring immediately.
A Securely clamp, being careful not to damage wiring.
A Clamp wiring so that there is no twist, unnecessary sag, or
excessive tension, except for movable part, where sag be
required.
A In installing a part, take care not to get wiring caught by it.
(1) Aged (3) Insulating Vinyl Tape
(2) Torn
0000002256E
(1) Clamp (3) Clamp
*Wind Clamp Spirally (4) Welding Dent
(2) Wire Harness
0000000617E
(1) Wiring (A) Correct
(2) Clamp (B) Incorrect
0000000618E
(1) Wiring (A) Incorrect
0000000619E

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G-5
A After installing wiring, check protection of terminals and
clamped condition of wiring, only connect battery.
[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 any battery with capacity other than is specified
(Ah).
A After connecting cables 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.
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.
[3] FUSE
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 power supply.
A Do not install accessories if fuse capacity of reserve power
supply is exceeded.
(1) Cover
*Securely Install Cover
0000000620E
0000000621E
(1) Fuse (2) Fusible Link
0000000622E

G-6
[4] CONNECTOR
A For connector with lock, push lock to separate.
A In separating connectors, do not pull wire harnesses.
A Hold connector bodies to separate.
A Use sandpaper to remove rust from terminals.
A Repair deformed terminal. Make certain there is no terminal
being exposed or displaced.
A Make certain that there is no female connector being too open.
(A) Push
0000000623E
(A) Correct (B) Incorrect
0000000624E
(1) Exposed Terminal (3) Sandpaper
(2) Deformed Terminal (4) Rust
0000000625E
(A) Correct (B) Incorrect
0000000626E

G-7
A Make certain plastic cover is large enough to cover whole
connector.
[5] HANDLING OF CIRCUIT TESTER
A Use tester correctly following manual provided with tester.
A Check for polarity and range.
(1) Cover (A) Correct
(B) Incorrect
0000000627E
0000000628E

G-8
4. LUBRICANTS, FUEL AND COOLANT
*KUBOTA original transmission hydraulic fluid.
Place Capacity Lubricants, fuel and coolant
1 Fuel tank
29.5 L
7.79 U.S.gals.
6.49 lmp.gals.
No. 2-D diesel fuel
No. 1-D diesel fuel if temperature is
below -10 (14 )
2 Coolant (with reserve tank)
6.1 L
6.4 U.S.qts.
5.4 lmp.qts.
Fresh clean water with anti-freeze
3 Engine crankcase (with filter)
6.7 L
7.1 U.S.qts.
5.9 lmp.qts.
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
4 Transmission case
22 L
5.81 U.S.qts.
4.84 lmp.qts.
KUBOTA SUPER UDT fluid*
5 Front differential case oil
4.0 L
4.2 U.S.qts.
3.5 lmp.qts.
KUBOTA SUPER UDT fluid or
SAE80, 90 gear oil
Grease
Place No. of greasing point Capacity Type of grease
6
Brake pedal shaft 1
Until grease
overflows
Multipurpose
type grease
Clutch pedal shaft 1
Top link 2
Lift rod 1
Battery terminal 2
Moderate
amount
Cruise control lever 2
Speed control wire Oiling Engine oil
0000007958E

G-9
5. TIGHTENING TORQUES
[1] GENERAL USE SCREWS, BOLTS AND NUTS
Screws, bolt and nuts whose tightening torque are not specified in this Workshop Manual should be tightened
according to the table below.
[2] STUD BOLTS
Indication on top of
bolt
No-grade or 4T 7T 9T
Material of bolt SS400, S20C S43C, S48C SCr435, SCM435
Material of
opponent part
Ordinariness Aluminum Ordinariness Aluminum Ordinariness
Unit
Diameter
ft-lbs ft-lbs ft-lbs ft-lbs ft-lbs
M6
(6 mm, 0.24 in.)
7.85
to
9.31
0.80
to
0.95
5.79
to
6.87
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
9.81
to
11.2
1.00
to
1.15
7.24
to
8.31
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
12.3
to
14.2
1.25
to
1.45
9.05
to
10.4
M8
(8 mm, 0.31 in.)
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
16.7
to
19.6
1.7
to
2.0
12.3
to
14.4
23.6
to
27.4
2.4
to
2.8
17.4
to
20.2
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
29.5
to
34.3
3.0
to
3.5
21.7
to
25.3
M10
(10 mm, 0.39 in.)
39.3
to
45.1
4.0
to
4.6
29.0
to
33.2
31.4
to
34.3
3.2
to
3.5
23.2
to
25.3
48.1
to
55.8
4.9
to
5.7
35.5
to
41.2
39.3
to
44.1
4.0
to
4.5
29.0
to
32.5
60.9
to
70.6
6.2
to
7.2
44.9
to
52.0
M12
(12 mm, 0.47 in.)
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
77.5
to
90.2
7.9
to
9.2
57.2
to
66.5
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
103
to
117
10.5
to
12.0
76.0
to
86.7
M14
(14 mm, 0.55 in.)
108
to
125
11.0
to
12.8
79.6
to
92.5
124
to
147
12.6
to
15.0
91.2
to
108
167
to
196
17.0
to
20.0
123
to
144
M16
(16 mm, 0.63 in.)
167
to
191
17.0
to
19.5
123
to
141
197
to
225
20.0
to
23.0
145
to
166
260
to
304
26.5
to
31.0
192
to
224
M18
(18 mm, 0.71 in.)
246
to
284
25.0
to
29.0
181
to
209
275
to
318
28.0
to
32.5
203
to
235
344
to
402
35.0
to
41.0
254
to
296
M20
(20 mm, 0.79 in.)
334
to
392
34.0
to
40.0
246
to
289
368
to
431
37.5
to
44.0
272
to
318
491
to
568
50.0
to
58.0
362
to
419
0000000766E
Material of opponet
part
Ordinariness Aluminum
Unit
Diameter
ft-lbs ft-lbs
M8
(8 mm, 0.31 in.)
11.8
to
15.6
1.2
to
1.6
8.68
to
11.5
8.82
to
11.8
0.90
to
1.2
6.51
to
8.67
M10
(10 mm, 0.39 in.)
24.6
to
31.3
2.5
to
3.2
18.1
to
23.1
19.7
to
25.4
2.0
to
2.6
14.5
to
18.8
M12
(12 mm, 0.47 in.)
29.5
to
49.0
3.0
to
5.0
21.7
to
36.1
31.4 3.2 23.1
0000000767E

G-10
6. MAINTENANCE CHECK LIST
No.
Period
Item
Indication on hour meter
After
since
Refer-
ence
page50 100 150 200 250 300 350 400 450 500 550 600 650 700
1 Greasing -
every
50Hr
G-18,
19
2
Engine start
system
Check
every
50Hr
G-19
3
Wheel bolt
torque
Check
every
50Hr
G-20
4 Engine oil Change
every
100Hr
G-13
5 Brake pedal Adjust
every
100Hr
G-23
6 Fan belt Adjust
every
100Hr
G-23
7 Clutch pedal Adjust
every
100Hr
G-17
8
Battery
condition
Check
every
100Hr
G-25 *4
9
Air cleaner
element
[Single type]
Clean
every
100Hr
G-21 *1
Replace
every 1
year
G-21
10
Air cleaner
element
[Double type]
(Primary
element)
Clean
every
100Hr
G-21 *1
Replace
every 1
year
G-21 *2
Air cleaner
element
[Double type]
(Scondary
element)
Replace
every 1
year
G-21
11
Fuel filter
element
Clean
every
100Hr
G-22
Replace
every
400Hr
G-22
12 Parking brake Adjust
every
100Hr
G-24
13 Fuel line
Check
every
100Hr
G-22
Replace
every 2
years
G-22 *3
14 Engine oil filter Replace
every
200Hr
G-14
15
Hydraulic oil
filter
Replace
every
200Hr
G-16
16
Hydraulicoilfilter
[HST]
Replace
every
200Hr
G-16
17 Toe-in Adjust
every
200Hr
G-29

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Kubota stv36 tractor service repair manual