Shibaura ST333 Instruction manual

ST330/ST333
Chapter 1 GENERAL 1
Chapter 2－ENGINE 23
Chapter 3－TRACTOR MAIN BODY 64
WORKSHOP
MANUAL
MODEL
NOTE:
This WORKSHOP MANUAL for
the Tier 3 ENGINE of ST330 and
ST333 Tractor.

ST330/ST333
Chapter 1－GENERAL
1－1 External View
1－2 Specification & Performances
1－3 Precautions Before Servicing
1－4 Basic Understanding on Servicing
1－5 Sequence of Dismantling the Tractor
1－6 Installation and Trial Run
WORKSHOP
MANUAL
MODEL
NOTE:
This WORKSHOP MANUAL for
the Tier 3 ENGINE of ST330 and
ST333 Tractor.

INDEX
Chapter 1 GENERAL…………………………………………………………………………………..1
1-1 External Views……….……….………………..……………………………………………………….…..2
1-2 Specifications & Performance ………………………………………..……....…………………………..3
1-3 Precautions Before Servicing……….…………………………...……….……………………………......5
1-4 Basic Understanding on Servicing………....…………………………………………..…..……………..5
1. METRIC BOLT TORQUE SPECIFICATIONS…………..…..…..………………..…………………….………...6
1-5 Sequence of Dismantling the Tractor………………………………....…………………..…………….....7
1. FLOW CHART………………………………....…………………..………………………………………..7
2. ENGINE AND HST UNIT REMOVAL (9×3 and HST)……..….……….…….……………………..……8
3. TRANSMISSION REMOVAL (9×3 and HST)……………………………………...…………….……...15
1-6 Installation and Trial Run…………………………………...…..…….……………………...…………..20
1. INSTALLATION.….………………………………………………………………………….…..……..….20
2. TRIAL RUNNING…………………………………………………………………..……….……...…...…22

Introduction
IHI-Shibaura Machinery Co., Ltd.
Tractor and Turf Care Machinery Division
Tractor Quality Assurance Group
In order to refine the Shibaura tractor series furthermore, ST series
tractors were developed this time.
These are economical tractors provided with practical functions and high
power.
They meet users’ needs according to efficient and economical
specifications requiring no after-care.
This manual describes structure, functions, maintenance and service
procedures for the ST tractors to obtain their functions fully and for safe
operation.

1
Chapter 1. GENERAL

2
1-1 External Views
002Y
Unit: mm
Model A B C D E F G
ST 330
(9 ×3)
ST 333
(9 ×3)
2825 2490 300 1390 1600 1150 1115
(953~1345)
ST 330
(HST)
ST 333
(HST)
2825 2425 240 1500 1600 1100 1155

3
1-2 Specifications & Performances
Model ST330 ST333 ST330 ST333
HST 9 ×3
Main Body
Length (Lower Link at horizontal) 2825
Height
Top Steering Wheel 1373 mm 1432 mm
Top ROPS 2425mm 2490 mm
Width 1470 mm 1345 mm
Wheel Base 1600 mm
Minimum Ground Clearance 240 mm 285 mm
Minimum Turning Radius (with brake) 2760 mm
Weight (W/ROPS) 1090kg 1090kg 1115kg 1115kg
Front Wheel
Tire Size 25 ×8.50 – 14 (Turf) 7–14 (AG)
6–14 (AG)-Option
Inflation See “Operator’s Manual”
Tread 1150 mm 1100 mm
Rear wheel
Tire Size 13.6 – 16 (Turf) 11.2-24 (AG)
9.5-24 (AG)-Option
Inflation See “Operator’s Manual”
Tread 1120 mm 1070 (953~1345) mm
Clutch Single Disc Dry Type
Speed Change method Hydrostatic Transmission Selective Sliding Shifter
Running Speed Changes 3 Steps Forward and
3 Steps Reverse
9 Speeds Forward and
3 Speeds Reverse
Differential 4 Pinion Spiral Bevel Drive Type with Diff. Lock
Brakes Wet type Disc (R.H., L.H. Independently)
Steering Full Hydraulic Power Steering
No. of PTO Speeds 1 Speed 1-Speed or 2-Speed
PTO Shaft Size 35 mm in Diameter with 6 Square Splines
Three Point Linkage Size Category 1
PTO Shaft Ground Clearance Mid 296 mm
Rear 499 mm 555 mm
PTO Shaft Rotating Direction Clockwise as seen from output end side
Engine
Model N843 (ST330) N843 (ST333)
Type Water-Cooled 4-Cycle Vertical Diesel Engine
Number of Cylinders 3
Total Stroke Volume N843 - 1496cc
Continuous Rated Speed 2,800 rpm
Compression Ratio 22.2 : 1
Fuel Diesel Fuel Oil
Starting Method By Starting Motor

4
The ground speeds are engine speed at 2800 rpm with 11.2-24 Rear Tires On Manual Transmission.
The ground speeds are engine speed at 2800 rpm with 13.6-16 Rear Tires On Model HST Transmission.
Range Main Gear
Position
Manual Transmission Hydrostatic Transmission
AG Tire Turf Tire AG Tire Turf Tire
Ground Speeds
Forward (km/h)
L
1 1st 1.30 1.17
0 – 5.59 0 – 5.63
2 2nd 1.94 1.73
3 3rd 2.78 2.49
M
1 4th 4.14 3.70
0 – 13.07 0 – 11.692 5th 6.11 5.46
3 6th 8.79 8.24
H
1 7th 10.58 9.47
0 – 25.18 23.842 8th 15.65 14.00
3 9th 23.04 20.07
Reverse (km/h)
L
R
R1 1.94 1.73 0 – 3.92 0 – 3.94
M R2 6.11 5.46 0 – 9.15 0 – 8.18
H R3 15.65 14.00 0 – 17.63 0 – 16.69
No. of PTO Speeds 1 or 2 1
1-speed
PTO Model
Engine speed for 540rpm Rear PTO (rpm) 2455 2500
Engine speed for 2000rpm Mid PTO (rpm) 2420
2-speeds
PTO Model
Engine speed for 540rpm Rear PTO (rpm) 2485 －
PTO speed at engine speed 2800 rpm
(rpm)
608 －
893 －
Capacities
Fuel Tank 30 Liters
Engine oil Less Filter 4.0 Liters, with Filter Change 4.5 Liters
Cooling Water 5 Liters
Transmission Oil 32.5 Liters (HST) , 30.5 Liters (9 ×3)
Hydraulics Transmission Oil used in common
Front Axle Gear Case 3.1 Litters
(Front differential gear case 1.5 litters and final reduction gear case 0.8 Liters×2)
Electrical System
Grounding Negative (—)
Battery 12 Volt, 55 amps. (HST), 12 Volt, 64 amp. (9×3)
Starting Motor 12 V — 1.7 kW
Glow Plug 11 V — 9.5 A
Alternator 12 V — 40 A
Regulator 13.8 V — 14.8 V (Adjusted voltage)
Head Light 65 W/55 W
Horn 12 V
Brake Lamp 21 W
003Y
Small Lamp 5 W
Tail Lamp 5 W
Flasher Lamp 21 W
Each Warning Lamp 3.4 W
High Beam Indicator 1.7 W
License Lamp 5 W

5
1-3 Precautions Before Servicing
(1) Have the tractor washed clean and have the oil, fuel, and cooling water drained out depending on the work required.
(2) Service shop should always be kept clean to prevent dust from rising and should be well lit.
(3) The disassembled parts should have the oil and grease washed off and arranged on a stand separated by groups.
(4) Clothing, service tools and equipments should be checked to ensure safety at all times.
1-4 Basic Understanding on Servicing
(1) Engine, transmission, and hydraulic components have been specially manufactured with a high degree of accuracy. Care
should be exercised to maintain them in a clean state. Do not disassemble unnecessarily.
(2) Defective parts due to wear and other causes shall be discarded and new parts ordered with the tractor model, serial No.,
code No., and part name clearly defined. (Keep the defective parts on hand to show to the customer.)
(3) When assembling, it is essential to have oil applied to all moving parts so that they will be provided with initial oil film
until normal lubrication takes place.
(4) Unless specially instructed, bolts and nuts shall be tightened to the correct setting using a torque wrench.

6
1. METRIC BOLT TORQUE SPECIFICATIONS
Bolt Size Grade No.
Coarse Thread Fine Thread
Pitch (mm) Newton Meters Kilo-gram
Meters Pitch (mm) Newton-
Meters Kilo-gram Meters
M6
4T, 4.8
1.0
4.9-6.9 0.5-0.6
- - - - - - - - - - - - - - -7T, 8T, 8.8 8.3-11.3 0.85-1.15
10T, 11T 11.7-15.7 1.2-1.6
M8
4T, 4.8
1.25
12.7-16.7 1.3-1.7
1.0
15.2-20.1 1.55-2.05
7T, 8T, 8.8 22.6-28.4 2.3-2.9 26.5-34.3 2.7-3.5
10T, 11T 28.5-36.3 2.9-3.7 30.4-40.2 3.1-4.1
M10
4T, 4.8
1.5
25.5-33.3 2.6-3.4
1.25
28.4-36.2 2.9-3.7
7T, 8T, 8.8 44.1-55.9 4.5-5.7 49.0-62.7 5.0-6.4
10T, 11T 54.0-69.6 5.5-7.1 57.8-73.5 5.9-7.5
M12
4T, 4.8
1.75
37.3-47.0 3.8-4.8
1.25
43.1-54.9 4.4-5.6
7T, 8T, 8.8 65.7-83.3 6.7-8.5 74.5-94.1 7.6-9.6
10T, 11T 92.0-116 9.4-11.8 99.0-126 10.1-12.9
M14
4T, 4.8
2.0
62.8-80.4 6.4-8.2
1.5
69.6-87.2 7.1-8.9
7T, 8T, 8.8 104-132 10.6-13.4 117-148 11.9-15.1
10T, 11T 139-175 14.2-17.8 149-184 15.2-18.8
M16
4T, 4.8
2.0
86.1-110 8.8-11.2
1.5
91.1-114 9.3-11.7
7T, 8T, 8.8 149-185 15.2-18.8 157-192 16.0-19.6
10T, 11T 205-255 21-26 221-269 22.5-27.5
M18
4T, 4.8
2.0
113-141 11.6-14.4
1.5
132-162 13.4-16.6
7T, 8T, 8.8 196-236 20-24 231-279 23.5-28.5
10T, 11T 275-333 28-34 298-367 30.5-37.5
M20
4T, 4.8
2.5
144-180 14.7-18.3
1.5
172-210 17.5-21.5
7T, 8T, 8.8 240-290 24.5-29.5 275-333 28.0-34.0
10T, 11T 363-441 37-45 397-485 40.5-49.5
Bolt head identification mark Strength grade
Example
4.8
4.8
8.8
004Y
10.9
Indicates yield point,
80% of tensile strength
32 kgf/mm2
Tensile strength
40 kgf/mm2

7
1-5 Sequence of Dismantling the Tractor
1. FLOW CHART
1) Manual Transmission Model 2) Hydrostatic Transmission Model
Front axle
Engine
Clutch case
Transmission
Rear axle Hydraulic cylinder case
Front axle
Engine
Clutch case
Transmission (Front)
Transmission (Rear)
Rear axle Hydraulic cylinder case

8
2. ENGINE AND HST UNIT REMOVAL (9 × 3 and HST)
DISASSEMBLY
1) STEERING WHEEL, INSTRUMENT PANEL
①Remove the cap, retaining nut and spring washer.
②Pull the steering wheel.
③Pull the instrument panel and disconnect the main wire
harness, speed meter cable and combination switch
connector.
④Remove the rubber and instrument panel.
NOTE:
Keep the glass face of the instrument panel up after removal.
This will prevent the silicone oil in the fuel level gauge and
coolant temperature gauge from leaking out causing the
gauges to give a false indication during operation.
2) BONNET (HOOD)
①Disconnect the negative terminal from the battery.
② Disconnect the connector for head lamps.
③ Remove the cover from rear of hood.
④ Remove the clip pin and washer from the hood support
plate, and gradually lower the hood.
⑤ Remove the clip pins from the hood hinge pin and
remove the hinge pin.
⑥ Remove the hood from the tractor.
3) SIDE COVER, EXHAUST MANIFOLD
①Remove the right and left side covers.
②Remove the muffler cover, muffler and tail pipe from the
engine.
4) BATTERY
①Disconnect the positive terminal from the battery, and
remove the clamp and battery.
005Y
006Y
007Y
008Y

9
5) AIR CLEANER ASSEMBLY
①Un tighten the hose band of the intake manifold.
②Remove the air cleaner assembly from the air cleaner
support.
6) RADIATOR ASSEMBLY
①Remove the radiator supports.
②Untighten the hose bands and disconnect the radiator
hoses.
③ Remove the reserve tank from the battery support.
④ Remove the radiator assembly.
7) DASH BOARD (SHROUDING)
①Remove the cover （R.H. and L.H.）and dash board
（Rear）.
②Remove the screws securing the steering column center
shrouding, disconnect the electrical connectors from the
ignition switch and light switch, and remove the
shrouding.
8) THROTTLE CABLE
①Remove the cotter pin from the throttle lever and
disconnect the throttle cable.
②Disconnect the electrical connector from the tractor rear
main harness.
009Y
010Y
011Y
012Y

10
9) FUEL TANK
①Disconnect the two fuel return hoses from the top of the
fuel tank.
②Disconnect the fuel supply line from the fuel shut-off
valve and drain the fuel from the tank into a clean
container.
③Disconnect the electrical connectors from the fuel level
sender unit.
④Remove the bracket form top of the fuel tank.
⑤Remove the spillover collector from the fuel tank neck.
⑥Remove the screws and tank from the tractor.
10) SIDE STEP
①Remove the floor mat and sponge.
②Remove the foot throttle linkage return spring, remove
cotter pin and disconnect the foot throttle linkage from
underneath the right side step. (9×3 Model only)
③Remove the bolts and side steps.
11) SUCTION PIPE
①Remove the bolts and lock washers and disconnect the
hydraulic pump suction line from both oil pumps.
②Remove the hydraulic tubing support clamps from under
the tractor.
③Remove the hose band and power steering oil return hose
from the suction pipe.
④Loosen the hose clamp and separate the suction line
from the hose.
013Y
014Y
015Y
016Y

11
12) DIVERTER VALVE
①Remove the banjo bolts and disconnect the sump return
from the diverter valve disconnect the other end from the
sump.
② Disconnect the system pressure line from the diverter
valve and the lift cover.
③ Remove the diverter valve.
13) RUBBER AND DRIVE SHAFT
①Loosen the clamps on the front wheel drive shaft rubber
boot and slide the boot rearward to gain access to the
shaft universal joint.
②Remove the universal joint locking bolts from the front
axle and transmission end universal joints and if
necessary, remove the drive shaft.
14) POWER STEERING PIPING
①Remove the clamps for power steering oil pipings.
②Disconnect the oil pipes and hoses and remove them.
15) WIRING
①Disconnect the wire harness from the starter, alternator,
engine temperature switch, glow plug and engine oil
pressure switch, and move the harness out of the way.
②Remove the starter mounting bolts and remove the
starter.
017Y
018Y
018-1Y

12
16) HST PIPING, OIL COOLER, OIL FILTER
WITH BASE (HST MODEL)
①Remove the clamps for HST piping.
②Release the hose bands and remove the banjo bolts,
pipings and oil filter with base.
③Remove the brackets and oil cooler from on the radiator.
④Release the hose band and remove the banjo bolt and
suction pipe for HST.
17) BATTERY BASE, FRONT AXLE SUPPORT
①Remove the bolts and battery base from on the front axle
support.
②Lift the engine with the hoist and put the safety stand
under the clutch housing.
③Heat the front axle support attaching bolts head by
burner, and remove the bolts and front axle support with
front axle assembly.
④Separate the front axle assembly from the support.
18) FIREWALL
①Disconnect the electric wire connectors from the light
switch and relay etc.
②Remove the firewall with electric wire harness.
019Y
020Y
021Y

13
19) POWER STEERING CONTROL VALVE,
COLUMN
①Remove the cruise control assembly from the steering
column on HST model.
②Remove the bolts and steering column from the clutch
housing.
③Remove the power steering control valve from the
column.
20) ENGINE
①Remove the engine attaching bolts and separate the
engine from the clutch housing.
21) CLUTCH HOUSING (HST ONLY)
①Remove the HST test port from top of clutch housing.
② Note the HST control rod length before removing for
reassembly.
③ Remove the cotter pin and disconnect the clutch rod.
④ Remove the spring and release bearing from front of
HST.
⑤ Remove the damper from R.H. side of the transmission
housing.
⑥ Remove the nut and disconnect the turn buckle from the
shift link.
⑦ Remove the shift link.
⑧ Remove the clutch housing retaining bolts, and separate
the clutch housing.
024-2Y
022Y
023Y
024Y
024-1Y

14
22) HST UNIT
①Remove the HST unit from the extension housing.
23) HST SHIFT LINK ASSEMBLY
①Remove the E-clip and remove the HST control pedal.
025Y
026Y

15
3. TRANSMISSION REMOVAL (9 × 3 and HST)
1) DISASSEMBLY
(1) SEAT ∙SEAT TRACK · GRIP · LEVER GUIDE
➀Remove the seat assembly.
➁Remove the grips from the hydraulic control lever,
FWD control lever, transmission speed range lever.
➂Remove the lever guides from the fender.
➃Place a safety support jack under the rear of the clutch
housing.
027Y
1. Seat Assembly 5. Side Panel – Front
2. Lever Guides 6. FWD Lever
3. Range Lever 7. Hydraulic Control Lever
4. PTO Lever
(2) FRONT SIDE COVER
HIGH-PRESSURE INLET TUBE
①Disconnect the FWD shaft from the transmission, see
ENGINE REMOVAL.
②Open the hood and remove the front side cover.
③Disconnect the high-pressure inlet tube, from the valve
cover and plug the openings.
(3) ROPS · REAR WHEEL
①If not separating the front axle and engine, place the
wood wedges, between the front axle support and front
axle to prevent the engine from tipping.
②Remove the hand brake assembly from the ROPS.
③Disconnect the rear light wire connectors.
④Remove the ROPS bar.
⑤Using a moveable hoist and sling, support the rear
transmission and center housing.
⑥Remove the tractor rear wheels.
029Y
028Y
030Y

16
(4) FENDERS, TOOLBOX, CENTER FRAME
①Remove the fenders and ROPS. frame: lower.
②Remove the clip pin and pin from the both brake levers
to separate the hand brake wires.
③Remove the center frame.
(5) TRANSMISSION COVER PLATE
①Remove the transmission cover：Flower.
(6) CASE COVER BRAKE ROD
①Remove the bolt, banjo bolt and return pipe from the
clutch housing. transmission housing (HST Model
only).
② Remove the step plates, from both sides of the tractor,
see ENGINE REMOVAL.
③ Remove the case cover.
④Place blocking at the front and rear of both front wheels.
⑤Disconnect the brake rods from the brake lever.
031Y
032Y
033Y