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T303HST
TYM T303HST User Manual
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SECTION 3.
DISASSEMBL
Y
,INSPECTION,AN
D REASSEMBL
Y
1.HST
sy
stem an
d change gears (front
transmissio
n).
1. I
nput
shaft From engine
2. Control L
ever
3. Bac
k
Plate
4.Hy
drostatic
Motor
7. Char
ge pressure relief V
alve
8. Filter mount port
9. For
,&Rev
.Relief
valves
10. Hy
drostatic
pump
5-3
Fig.5-2
103
105
Table of Contents
T303Hst/T353Hst
2
Table of Contents
2
Chapter 1. Introduction
3
Warning Signs in this Manual
7
Safety Signs
8
Safety Decals
13
Universal Symbols
16
Section 2. Specifications
19
Section 3. Gear Train Diagrams
22
Section 4. Precautions for Tractor Operations
23
Instruments
23
Controls
25
Filling Diagram and Capacity Table
26
Maintenance Chart
27
Chapter 2 Disassembly and Reassembly of Major Components
30
Before Operation
31
Precautions to be Followed When Installing Standardized Parts
31
Section 2. Operation Chart for Disassembly
34
Front Axle
34
Brake Case
34
Section 3. Separation of Major Components
35
Separation of the Front Axle and Axle Bracket
35
Separation of the Engine and Front Axle Bracket
36
Separation of the Engine and Front Transmission
37
Separation of the Rear Transmission and Rear Axle Housing
48
Separation of the Rear Transmission and MID PTO
50
Separation of the Rear Transmission and Cylinder Case
51
Chapter 3 Engine Accessories
52
Chapter 2 . Disassembly and Reassembly of Major Point
53
Section 1. Radiator
53
General Description
53
Radiator
54
Specifications
55
Removal of the Radiator
55
Inspection of each Part
55
Radiator Reassembly
57
Daily Inspection
57
Trouble Shooting
58
Section 2. Air Cleaner System
59
General Description
59
Inspection of each Part
61
Cleaning of the Air Cleaner
61
Element Installation
62
Chapter 4 Hst System
63
Section 1. Specifications
64
Special or Essential Tools
65
Other Materials
65
Section 2. Component Location
66
Hydraulic Hoses and Lines
66
Hydrostatic Transmission
67
Transmission Main Pump Case
68
Transmission Back Plate and Motor
69
Hydrostatic Control Linkage
70
Hydrostatic System Schematic
71
Section 3. Troubleshooting
73
Section 4. Diagnostics
74
Section 5. Theory of Operation
75
Hydrostatic System
75
Section 6.Tests and Adjustments
76
Hydrostatic Pedal and Neutral Adjustment
76
Hydrostatic Pump Pressure Test
77
Charge Pump Pressure Test
78
Hydraulic System Bleed Procedure
79
Section 7.Repair
80
Tractor Splitting (Front)
80
Hydrostatic Transmission Disassembly
87
Hydrostatic Pump Disassembly
87
Hydraulic Pump
89
Hydrostatic Pump Inspection
92
Hydrostatic Pump Assembly
93
Hydrostatic Motor Disassembly
95
Hydrostatic Motor Assembly
98
Chapter 5 Transmission
101
Section 1.General Description
102
PTO Drive System
102
Power Train Diagrams
102
Section 2. Specifications
103
Wheel Drive System
103
PTO Drive System
103
HST System and Change Gear(Front Transmission)
104
MID Transmission Case
112
MID PTO Stopper
114
MID PTO Stopper Operation
115
Shifter and Related Parts
125
Chapter 6 Front Axle
140
Chapter 5 . Transmission
140
Section 4.Trouble Shooting
140
Section 2. Specifications
142
Section 3.Disassembly,Inspection,And Reassembly
143
Center Pivot
143
Disassembly
144
Inspection
144
Reassembly
144
Front Differential
146
Disassembly
147
Inspection
147
Reassembly
148
Final Case
150
Disassembly
151
Steering Cylinder
154
Inspection/Reassembly
156
Chapter 7. Rear Axle and Brakes
156
Inspection
156
Reassembly
156
Section 4.Trouble Shooting
156
Section 1.General Description
157
Section 2. Specifications
158
Section 3.Disassembly,Inspection,And Reassembly
159
Rear Axle Housing and Brake System
159
Disassembly/Inspection
164
Disassembly
164
Inspection
164
Reassembly
164
Chapter 8. Power Steering System
165
Section 1.General Description
165
Section 2. Specifications
166
Gear Pump
166
Oil Tank
166
Section 3. Function
167
Technical Data
168
Section 4.Disassembly,Inspection,And Reassembly
170
Special Tools
171
Disassembly
171
Reassembly
172
Section 5. Troubleshooting
176
Chapter 9. Hydraulic System
179
Section 1. General Description
180
Section 2.Specifications
181
Section 3. Major Component of the Hydraulic System
182
Hydraulic System
182
Flow-Divider
183
Flow-Control Valve(Slow-Return Check Valve)
186
Gear Pump
189
Filter
194
Section 4. Remote Hydraulic Control
195
Remote Hydraulic Control Valve (Optional)
195
Section 5.Hydraulic System
196
Hydraulic Cylinder
196
Linkage(Internal)
198
Linkage(External)
199
Main Control Valve
200
General Description
200
Specifications
200
Operation
201
Section 6. Troubleshooting
206
Chapter 10 Electrical Accessory and Instruments
210
Electrical Accessory and Instruments
211
Section 1. General Description
211
Section 2. Specifications
211
Section 3. Battery
212
Inspection
212
Inspection of Electrolyte Level
212
Inspection of Electrolyte Specific Gravity
212
Battery Testing Chart
213
SECTION 4. Meters and Switches
215
Meters
215
Removal
215
Fuel Gauge and Fuel Gauge Sensor
215
Thermometer
216
Starter Switch
216
Combination Switch
217
Stop Light Switch
218
Relay Unit
218
Fuse
218
Trailer Socket(7P)
221
Section 5. Earthing Point
222
Section 6. Wiring Diagram
224
Section 7. Troubleshooting
225
Chapter 11. Service Standard and Other Information
230
Section 1. Service Standards
231
Engine Accessories
231
Clutch Damper
232
Rear Axle
234
Power Steering System
234
Hydraulic System
234
Electrical Equipment
237
Service Standards and Other Information
231
Section 3. Conversion Tables
241
4
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TYM T303HST Specifications
General
Brand
TYM
Model
T303HST
Category
Tractor
Language
English
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