Iseki TG5330 TG5390 TG5470 Tractor Service & Repair Workshop Manual
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TG5330
TG5390
TG5470
MODELS:
1
This service manual has been prepared to provide the information and suggestions necessary
for servicing the ISEKI TG Tractor. These include construction, specifications, removal and rein-
stallation of the components, disassembly and reassembly instructions, inspection and adjust-
ment instructions, troubleshooting, general precautions etc.
Figures mentioned in this manual are standard values established by ISEKI for the TG, conse-
quently when a non-ISEKI part has been installed on the machine or adjustments and repairs
have been made in a manner other than as specified in this manual, the pertinent values men-
tioned herein are no longer valid. ISEKI does not assume responsibility for problems or damage
caused by a value deviation due to maladjustment or by the use of unauthorized parts.
Servicing procedures outlined in the manual contain sufficient information to return all compo-
nent parts of a machine to new condition. In discussion of each component part, it is assumed
that a complete overhaul is being performed, consequently, complete disassembly and reassem-
bly are outlined. The machine is relied upon to decide how far disassembly must be carried out
when complete overhaul is not required.
Study unfamiliar service procedures thoroughly and understand them clearly before attempting
disassembly. Specific data essential for proper overhaul, such as running clearances and torque
values, have been provided in interline of inspection and reassembling procedures of each group
section.
This manual was compiled from latest information available at time of publication, However
ISEKI reserves the right to make changes at any time without notice.
Whenever the terms“left”and“right”are used, this means as viewed by the operator when
seated in the operator’ s seat.
Whenever servicing the machines, pay sufficient attention to the operational safety to protect
you and other persons around the machines from danger by following carefully the instructions
given in the manual. Never take chances!
FOREWORD
ISEKI TRACTORS
2
TOTAL CONTENTS
TRACTORS
FOREWORD ................................................................................................................................ 1
TOTAL CONTENTS ...................................................................................................................... 2
TABLE OF CONTENTS ................................................................................................................ 5
CHAPTER 1. INTRODUCTION .................................................................................................... 13
CHAPTER 2. DISASSEMBLING INTO MAJOR FUNCTIONAL COMPONENTS........................ 21
CHAPTER 3. ENGINE ACCESSORIES ...................................................................................... 33
CHAPTER 4. CLUTCH SYSTEM.................................................................................................. 39
CHAPTER 5. TRANSMISSION .................................................................................................... 45
CHAPTER 6. REAR AXLE AND BRAKES .................................................................................. 63
CHAPTER 7. HYDROSTATIC TRANSMISSION .......................................................................... 71
CHAPTER 8. FRONT AXLE ........................................................................................................ 93
CHAPTER 9. HYDRAULIC SYSTEM .......................................................................................... 101
CHAPTER 10. ELECTRICAL SYSTEM........................................................................................ 177
CHAPTER 11. DIGITAL PANEL .................................................................................................. 235
CHAPTER 12. CABIN .................................................................................................................. 267
CHAPTER 13. SPECIAL TOOLS ................................................................................................ 297
CHAPTER 14. WIRING HARNESS .............................................................................................. 301
ENGINES
INTRODUCTION .......................................................................................................................... 3
CONTENTS .................................................................................................................................. 4
CHAPTER 1. GENERAL INFORMATION AND SPECIFICATIONS ............................................ 7
CHAPTER 2. SERVICE STANDARDS ........................................................................................ 13
CHAPTER 3. INSPECTION AND ADJUSTMENT ........................................................................ 29
CHAPTER 4. LUBRICATION SYSTEM ........................................................................................ 65
CHAPTER 5. COOLING SYSTEM ................................................................................................ 71
CHAPTER 6. FUEL SYSTEM ...................................................................................................... 73
CHAPTER 7. ELECTRICAL SYSTEM .......................................................................................... 85
TG TRACTOR SERVICE MANUAL
ISEKI TRACTORS
TG5330
TG5390
TG5470
ISEKI TRACTORS
TG5330
TG5390
TG5470
CHAPTER 1
CHAPTER 2
CHAPTER 3
CHAPTER 4
CHAPTER 5
CHAPTER 6
CHAPTER 7
CHAPTER 8
CHAPTER 9
CHAPTER 10
CHAPTER 11
CHAPTER 12
CHAPTER 13
CHAPTER 14
5
FOREWORD ................................................................................................................................ 1
TOTAL CONTENTS ...................................................................................................................... 2
TABLE OF CONTENTS ................................................................................................................ 5
CHAPTER 1. INTRODUCTION .................................................................................................... 13
1. TRACTOR TYPES AND PUNCHED IDENTIFICATION MARKS .......................................... 13
1.1. MODEL NAME PLATE .................................................................................................. 13
1.2. CHASSIS PRODUCTION NUMBER.............................................................................. 13
1.3. ENGINE MODEL AND SERIAL NUMBER .................................................................... 13
2. SPECIFICATIONS ................................................................................................................ 14
GENERAL DIMENSIONS (ROPS TYPE) ............................................................................ 17
GENERAL DIMENSIONS (CABIN TYPE) ............................................................................ 18
3. GENERALPRECAUTIONS FOR SEPARATION AND RE-INSTALLATION ........................ 19
3.1. BEFORE OPERATION .................................................................................................. 19
3.2. PRECAUTIONS TO BE FOLLOWED
3.2. WHEN INSTALLING STANDARDIZED PARTS ............................................................ 19
CHAPTER 2. DISASSEMBLING INTO MAJOR FUNCTIONAL COMPONENTS........................ 21
1. OPERATION CHART FOR DISASSEMBLING
1. AND RE-ASSEMBLING BY MAJOR BLOCKS .................................................................... 21
2. DISASSEMBLY OF FUNCTIONAL BLOCKS ........................................................................ 22
2.1 REMOVAL OF EXTERIOR PARTS ................................................................................ 22
2.1.1 ENGINE HOOD, SIDE COVER AND FRONT GRILLE............................................ 22
2.1.2 BATTERY ................................................................................................................ 22
2.1.3 FLOOR .................................................................................................................... 23
2.2. SEPARATION OF ENGINE FROM FRONT TRANSMISSION ...................................... 26
2.3. CLUTCH AND FLYWHEEL, REAR PLATE OF ENGINE, ENGINE .............................. 27
2.3.1 CLUTCH .................................................................................................................. 27
2.3.2 FLYWHEEL .............................................................................................................. 28
2.3.3 REAR PLATE .......................................................................................................... 28
2.3.4 ENGINE .................................................................................................................. 28
2.4. SEPARATION OF TRANSMISSION CASE .................................................................. 28
2.4.1. TRANSMISSION CASE (Standard&Power shift type) ............................................ 28
2.4.2. TRANSMISSION CASE (HST type) ............................................................................ 29
2.5. REMOVAL OF REAR AXLE HOUSING ........................................................................ 30
2.6. REMOVAL OF FRONT AXLE ........................................................................................ 31
2.7. REMOVAL OF CYLINDER CASE .................................................................................. 31
2.8. REMOVAL OF THE RADIATOR .................................................................................... 32
2.9. REMOVAL OF THE MID PTO ........................................................................................ 32
CHAPTER 3. ENGINE ACCESSORIES ...................................................................................... 33
1. RADIATOR ............................................................................................................................ 33
1.1. CONSTRUCTION .......................................................................................................... 33
1.2. REMOVALAND RE-INSTALLATION ............................................................................ 33
1.3. INSPECTION ................................................................................................................ 33
TABLE OF CONTENTS
ISEKI TRACTORS
6
2. COOLING FAN AND BELT.................................................................................................... 34
2.1. SPECIFICATINOS ........................................................................................................ 34
2.2. ADJUSTMENT OF BELT................................................................................................ 34
3. AIR-CLEANER ...................................................................................................................... 35
3.1. REMOVALAND RE-INSTALLATION ............................................................................ 35
3.2. INSPECTION ................................................................................................................ 35
3.3. CLEANING THE ELEMENT .......................................................................................... 35
4. FUEL SYSTEM...................................................................................................................... 35
4.1. FUEL SYSTEM DIAGRAM ............................................................................................ 35
4.2. INSPECTION ................................................................................................................ 36
4.3. FUEL FILTER ................................................................................................................ 36
4.4. AIR-BLEEDING .............................................................................................................. 36
5. TROUBLESHOOTING .......................................................................................................... 37
CHAPTER 4. CLUTCH SYSTEM.................................................................................................. 39
1. CONSTRUCTION (except for HST type) .............................................................................. 39
2. DISASSEMBLY .................................................................................................................... 39
3. INSPECTION ........................................................................................................................ 40
3.1. INSPECTION OF CLUTCH DISC .................................................................................. 40
3.2. INSPECTION OF CLUTCH COVER ASSEMBLY .......................................................... 41
3.3. INSPECTION OF RELEASE BEARING ........................................................................ 41
4. PRECAUTIONS FOR RE-ASSEMBLY ................................................................................ 41
5. TROUBLESHOOTING .......................................................................................................... 43
5.1. CLUTCH SLIPPAGE ...................................................................................................... 43
5.2. POOR DISENGAGING .................................................................................................. 43
CHAPTER 5. TRANSMISSION .................................................................................................... 45
1. TRANSMISSION CONSTRUCTION .................................................................................... 45
1.1 STANDARD
TG5330/5390 ........................................................................................................................ 45
TG5470 ................................................................................................................................ 46
1.2 POWER SHIFT TYPE
TG5330/5390 ........................................................................................................................ 47
TG5470 ................................................................................................................................ 48
1.3 HST TYPE
TG5330/5390 ........................................................................................................................ 49
TG5470 ................................................................................................................................ 50
2. POWER TRAIN SYSTEM .................................................................................................... 51
2.1 STANDARD TYPE
TG5330/5390 ........................................................................................................................ 51
TG5470 ................................................................................................................................ 52
2.2 POWER SHIFT TYPE
TG5330/5390 ........................................................................................................................ 53
TG5470 ................................................................................................................................ 54
2.3 HST TYPE
TG5330/5390 ........................................................................................................................ 55
TG5470 ................................................................................................................................ 56
3. DISASSEMBLY .................................................................................................................... 57
3.1. DISASSEMBLY (STANDARD & POWER SHIFT TYPE) .............................................. 57
3.2. DISASSEMBLY (HST TYPE) ........................................................................................ 60
TG TRACTOR SERVICE MANUAL
7
CHAPTER 6. REAR AXLE AND BRAKES .................................................................................. 63
1. GENERAL DESCRIPTION .................................................................................................... 63
2. REAR AXLE HOUSING AND DIFFERENTIAL GEARS ........................................................ 64
2.1. DISASSEMBLY .............................................................................................................. 64
2.1.1. REAR AXLE HOUSING .......................................................................................... 64
2.1.2. DIFFERENTIAL GEARS ........................................................................................ 64
2.2. INSPECTON .................................................................................................................. 65
2.3. ADJUSTMENT OF BACKLASH BETWEEN DRIVE PINION AND RING GEAR .......... 65
3. BRAKES ................................................................................................................................ 67
3.1. CONSTRUCTION .......................................................................................................... 67
3.2. DISASSEMBLY .............................................................................................................. 68
3.3. INSPECTION ................................................................................................................ 68
3.4. BRAKE FREE-PLAY ADJUSTMENT ............................................................................ 68
3.4.1. BRAKE PEDALS .................................................................................................... 68
3.4.2. PARKING BRAKE LEVER ...................................................................................... 69
4. TROUBLESHOOTING .......................................................................................................... 70
CHAPTER 7. HYDROSTATIC TRANSMISSION .......................................................................... 71
1. CONSTRUCTION AND NAMES OF MAJOR COMPONENTS
1. (TG5390FH/TG5470FH) ...................................................................................................... 71
2. OPERATION DIAGRAM OF HST ........................................................................................ 72
2.1. SLANT BOARD NEUTRAL POSITION .......................................................................... 72
TRAVELING FORWARD ...................................................................................................... 73
TRAVELING REARWARD .................................................................................................... 74
3. FUNCTION ............................................................................................................................ 75
3.1. VARIABLE TYPE PUMP ................................................................................................ 75
HIGH PRESSURE RELIEF VALVE ...................................................................................... 76
3.2. FIXED TYPE MOTOR .................................................................................................... 77
3.3. VALVES.......................................................................................................................... 77
LOW PRESSURE RELIEF VALVE ...................................................................................... 77
NEUTRAL VALVE ................................................................................................................ 78
CHECK VALVE .................................................................................................................... 78
4. DISASSEMBLY AND REASSEMBLY .................................................................................... 79
4.1. REQUIRED TOOLS ...................................................................................................... 79
4.2. PRESS-IN JIGS ............................................................................................................ 80
4.3. PRECAUTIONS FOR DISASSEMBLY .......................................................................... 81
4.4. DISASSMEBLY .............................................................................................................. 81
4.5. CRITERIA FOR REPLACING WORN PATRTS ............................................................ 84
4.6. PRECAUTION BEFORE REASSEMBLY ...................................................................... 85
4.7. REASSEMBLY .............................................................................................................. 85
4.8. LIST OF MAJOR COMPONENTS OF HST .................................................................. 88
5. HST COMTROL PEDALS AND LEVER ................................................................................ 89
5.1. DIMENSIONS OF HST PEDALS .................................................................................. 89
5.2. INSTALLATION OF HST PEDALS ................................................................................ 90
5.3. CRUISE CONTROL LEVER .......................................................................................... 90
6. AUTO ACCELERATION SYSTEM ........................................................................................ 91
6.1. DIMENSIONS OF HST PADALS .................................................................................. 91
6.2. ADJUSTMENT OF AUTO ACCELERATION SYSTEM .................................................. 91
7. TROUBLESHOOTING .......................................................................................................... 92
ISEKI TRACTORS
8
CHAPTER 8. FRONT AXLE ........................................................................................................ 93
1. CONSTRUCTION ................................................................................................................ 93
1.1. SECTIONAL VIEWS ...................................................................................................... 93
1.2. MAJOR COMPONENTS ................................................................................................ 94
2. DISASSEMBLY .................................................................................................................... 96
2.1. FINAL CASE AND RELATED PARTS ............................................................................ 96
2.2. FRONT AXLE AND DIFFERENTIAL GEARS ................................................................ 97
3. INSPECTIOIN ...................................................................................................................... 98
4. PRECAUTIONS .................................................................................................................... 98
5. TROUBLESHOOTING .......................................................................................................... 100
CHAPTER 9. HYDRAULIC SYSTEM .......................................................................................... 101
1. Major Component .................................................................................................................. 101
1.1. Standard model .............................................................................................................. 101
1.2. Power Shift model .......................................................................................................... 102
1.3. HST model .................................................................................................................... 103
2. HYDRAULIC CIRCUIT .......................................................................................................... 104
2.1. Standard model .............................................................................................................. 104
2.2. Power Shift model .......................................................................................................... 105
2.3. HST model .................................................................................................................... 106
3. Illustration for hydraulic circuit .............................................................................................. 107
3.1. Standard model .............................................................................................................. 107
3.2. Power Shift model .......................................................................................................... 108
3.3. HST model .................................................................................................................... 109
4. General Description .............................................................................................................. 114
4.1. Suction Filter .................................................................................................................. 114
4.1.1. Parts & Hydraulic Diagram...................................................................................... 114
4.1.2. Detail View .............................................................................................................. 114
4.1.3. Specifications .......................................................................................................... 114
4.1.4. Operation Mechanism ............................................................................................ 114
4.1.5. Others .................................................................................................................... 114
4.2. Gear Pump .................................................................................................................... 115
4.2.1. Parts & Hydraulic Diagram...................................................................................... 115
4.2.2. Detail View .............................................................................................................. 115
4.2.3. Specifications .......................................................................................................... 115
4.3. Main Relief Valve .......................................................................................................... 116
4.3.1. Parts & Hydraulic Diagram...................................................................................... 116
4.3.2. Detail View .............................................................................................................. 116
4.3.3. Specifications .......................................................................................................... 116
4.3.4. Operation Mechanism ............................................................................................ 116
4.3.5. Others .................................................................................................................... 116
4.4. Orbit roll.......................................................................................................................... 117
4.4.1. Hydraulic Diagram .................................................................................................. 117
4.5. Power steering cylinder .................................................................................................. 118
4.5.1. Hydraulic Diagram .................................................................................................. 118
4.5.2. Detail View & Specifications .................................................................................. 118
4.6. HST Oil cooler (Hydraulic transmission version) ............................................................ 119
4.6.1. Hydraulic Diagram .................................................................................................. 119
4.6.2. Detail View .............................................................................................................. 119
4.6.3. Detail View .............................................................................................................. 119
4.6.4. Operation Mechanism ............................................................................................ 119
TG TRACTOR SERVICE MANUAL
9
4.7. HST charge filter (Hydraulic transmission version) ........................................................ 120
4.7.1. Hydraulic Diagram .................................................................................................. 120
4.7.2. Detail View .............................................................................................................. 120
4.7.3. Specifications .......................................................................................................... 120
4.7.4. Operation Mechanism ............................................................................................ 120
4.8. HST Relief valve (Hydraulic transmission version) ........................................................ 121
4.8.1. Hydraulic Diagram .................................................................................................. 121
4.8.2. Detail View .............................................................................................................. 121
4.8.3. Specifications .......................................................................................................... 121
4.8.4. Operation Mechanism ............................................................................................ 121
4.9. HST UNIT (Hydraulic transmission version) .................................................................. 122
4.9.1. Hydraulic Diagram .................................................................................................. 122
4.10. POSITION CONTROL LINK & LEVER ........................................................................ 123
4.10.1. Parts...................................................................................................................... 123
4.10.2. Adjustment ............................................................................................................ 126
4.10.3. Operation Mechanism .............................................................................................. 126
4.11. JOYSTICK LINK & LEVER .......................................................................................... 127
4.11.1. Parts ...................................................................................................................... 127
4.11.2. Operation Mechanism .......................................................................................... 129
4.12. DRAFT CONTROL LINK & LEVER.............................................................................. 131
4.12.1. PARTS COMPONENTS ...................................................................................... 131
4.12.2. Adjustment ............................................................................................................ 132
4.13. EXTERNAL AUXILIARY HYDRAULICS LINK & LEVER (OPT) .................................. 133
4.13.1. Part Components (1) ............................................................................................ 133
4.13.1. Part Components (2) ............................................................................................ 134
5. Point Linkage ........................................................................................................................ 135
5.1. Parts .............................................................................................................................. 135
5.2. Each type of parts .......................................................................................................... 135
5.3. Specifications ................................................................................................................ 136
5.4. Drawbar.......................................................................................................................... 137
5.5. Front hitch ...................................................................................................................... 137
6. Maintenance .......................................................................................................................... 138
6.1. SUCTION FILTER .......................................................................................................... 138
6.2. GEAR PUMP.................................................................................................................. 138
6.3. MAIN RELIEF VALVE .................................................................................................... 138
6.4. MAIN CONTROL VALVE................................................................................................ 138
6.5. SLOW RETURN VALVE ................................................................................................ 139
6.6. SAFETY VALVE ............................................................................................................ 139
6.7. MAIN CYLINDER .......................................................................................................... 139
6.8. ASSIST CYLINDER ...................................................................................................... 140
6.9. PTO VALVE (Standard & HST model) .......................................................................... 140
6.10. REDUCE VALVE .......................................................................................................... 140
6.11. PTO VALVE (Power Shift model) ................................................................................ 140
6.12. POWER SHUTTLE VALVE .......................................................................................... 141
6.13. GEAR SHIFTING VALVE ............................................................................................ 141
6.14. PUSH-PULL CYLINDER for Shifting Gear .................................................................. 142
6.15. JOYSTICK VALVE ...................................................................................................... 142
6.16. External Hydraulic Pressure Removal (OPT) .............................................................. 144
6.17. The installation angle of the valve and the hose connection adapter ........................... 144
7. TROUBLESHOOTING .......................................................................................................... 146
7.1. TROUBLE ...................................................................................................................... 146
ISEKI TRACTORS
10
CHAPTER 10. ELECTRICAL SYSTEM........................................................................................ 177
1. Wiring Circuit ........................................................................................................................ 177
2. Instrument Panel (Standard model) ...................................................................................... 185
2.1. Aspect ............................................................................................................................ 185
2.2. Circuit ............................................................................................................................ 186
2.3. Pin layout ...................................................................................................................... 187
3. Switch, Relay, Sensor and Solenoid valve ............................................................................ 190
3.1. Switches on the instrumental panel .............................................................................. 190
3.2. Relay .............................................................................................................................. 193
3.3. Lever position sensor for driving and PTO system ........................................................ 195
3.4. Sensor ............................................................................................................................ 203
3.5. Solenoid valve ................................................................................................................ 213
4. PTO Control system .............................................................................................................. 227
4.1. Standard and HST model .............................................................................................. 227
4.2. Power Shift model .......................................................................................................... 229
4.3. Mechanism .................................................................................................................... 231
CHAPTER 11. DIGITAL PANEL .................................................................................................. 235
1. Digital Panel (Power Shift and HST model) .......................................................................... 235
1.1. Aspect ............................................................................................................................ 235
1.2. Circuit ............................................................................................................................ 236
1.3. Coupler of meter panel .................................................................................................. 238
1.4. Digital Panel Indication .................................................................................................. 239
1.5. Check Mode .................................................................................................................. 243
1.6.Countermeasures for monitor signal .............................................................................. 255
2. Switch and sensor ................................................................................................................ 264
2.1. Switch on instrument panel ............................................................................................ 264
2.2. Sensor on control lever .................................................................................................. 265
2.3. Sensor on engine .......................................................................................................... 266
CHAPTER 12. CABIN .................................................................................................................. 267
1. Outline of product .................................................................................................................. 267
1.1. Outline ............................................................................................................................ 267
1.2. Major components.......................................................................................................... 268
1.3. Specification .................................................................................................................. 268
2. Structure, operation, and control .......................................................................................... 269
2.1. Structure ........................................................................................................................ 269
2.1.1. Compressor assembly ............................................................................................ 269
2.1.2. Condenser .............................................................................................................. 270
2.1.3. Receiver dryer ........................................................................................................ 270
2.1.4. Air conditioner unit .................................................................................................. 271
2.1.5. Extract pension valve .............................................................................................. 271
2.1.6. Pressure switch ...................................................................................................... 271
2.1.7. Thermostat .............................................................................................................. 272
2.2. Operation and control of air conditioner ........................................................................ 272
2.2.1. Operation ................................................................................................................ 272
2.2.2. Control .................................................................................................................... 272
3. Check and maintenance........................................................................................................ 273
3.1. Air conditioner check and maintenance table ................................................................ 273
3.2. Daily check and handling of air conditioner.................................................................... 274
3.2.1. Refrigerant level check .......................................................................................... 274
TG TRACTOR SERVICE MANUAL
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