Cub Cadet 8454 Service Manual Page 247
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- Table of contents
- TROUBLESHOOTING
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HYDRAULIC SYSTEM
6-53
D569-W02 May-2003
OIL FLOW
Neutral Position
When the steering wheel (2) is not being turned valve
plate (3) is held in the neutral position by centering
springs (4). Under this condition an oil passage is
formed between port P (from pump) and port T (to trans-
mission case) in the control valve and all oil from the
hydraulic pump flows to port T. Also the passage from
cylinder ports R and L are closed off in the control valve.
Consequently steering cylinder does not operate even
if subjected to an external force and the front wheels
are held in the straight ahead position or an a given
angle of turn.
Right Turn
When the steering wheel is turned to the right, the ac-
tion is transmitted through the drive plate gerotor and
drive link to the control valve. Valve plate (3) then ro-
tates to the right on manifolds locates on the opposite
faces of the valve plate (3).
Thus the port P passage in the control valve is con-
nected with GEROTOR (5). The stator of gerotor (5)
turns by the amount corresponding to the turn of the
steering wheel (2) and the gerotor performs the meter-
ing function and lets oil through it, the amount of which
corresponds to the turn of the steering wheel (2). The
oil which has passed through GEROTOR (5) flows
back to the control valve, in which it is directed to cylin-
der port R to operate steering cylinder (6).
Consequently, The front wheels are moved to the right
through the angle corresponding to the amount of the
oil.
When steering cylinder (6) operates, oil returning to
cylinder port L flows back to the transmission case
through the passage connected to port T in the control
valve.
P: Pump Port R: Cylinder Port R
T: Tank Port L: Cylinder Port L
(1) Steering Controller (4) Centering Spring
(2) Steering Wheel (5) GEROTOR
(3) Valve Plate (6) Steering Cylinder
P: Pump Port R: Cylinder Port R
T: Tank Port L: Cylinder Port L
(1) Steering Controller (4) Centering Spring
(2) Steering Wheel (5) GEROTOR
(3) Valve Plate (6) Steering Cylinder
569W667A
569W668A
www.mymowerparts.com
K&T Saw Shop 606-678-9623 or 606-561-4983
- FORM NUMBER 769-00903 1
- CONTENTS 3
- 1. TRACTOR VIEW 11
- 2.1 TIGHTENING TORQUE 12
- GENERAL INFORMATION 13
- 3. SPECIFICATION 14
- 3. SPECIFICATION CON'T 15
- 4. IDENTIFICATION 16
- 5. CAUTION BEFORE REPAIR 17
- 5.6 ELECTRICAL SYSTEM 18
- 5.5 ASBESTOS PARTS 18
- 6. REGULAR CHECK LIST 20
- CHAPTER 2 23
- 1. GENERAL 25
- 1.3 PERFORMANCE CURVE 27
- Sample/td Spec 28
- 2. STRUCTURE AND FUNCTION 29
- 569W211A 30
- 569W210A 30
- 569W209A 30
- F. CAMSHAFT 31
- G. FUEL CAMSHAFT 31
- H. ROCKER ARM ASSEMBLY 31
- CHAPTER 2 8454 32
- 2.2 LUBRICATING SYSTEM 33
- 2.3 COOLING SYSTEM 35
- 2.4 FUEL SYSTEM 37
- 569W231A 39
- 569W232A 39
- E. FUEL INJECTION NOZZLE 41
- 569W239A 43
- 569W240A 43
- 2.5 INTAKE AND EXHAUST SYSTEM 44
- D. TURBOCHARGER (8454) 45
- 3.1 TROUBLESHOOTING 46
- 3.2 SERVICING SPECIFICATIONS 49
- I. Timing Gear 51
- C. COOLING SYSTEM 53
- D. FUEL SYSTEM 53
- A. ENGINE DISASSEMBLED VIEW 55
- 1) Fan belt 57
- 1) Engine body 57
- 2) Solenoid 58
- 1) Compression pressure 59
- 3) Rocker arm assembly 61
- 4) Cylinder head 62
- 5) Valve 62
- 1) Injection pump 63
- 7) Idle gear and crank gear 65
- 569W283A 69
- 569W282A 69
- 569W281A 69
- 12 13111078210 65439 71
- 569W295A 73
- 569W294A 73
- 569W293A 73
- 569W2A1A 75
- 569W2A0A 75
- 569W299A 75
- 569W2A6A 77
- 569W2A5A 77
- 569W2B1A 79
- 569W2B0A 79
- 569W2A9A 79
- 569W2B3A 81
- 569W2B4A 81
- 569W2B6A 82
- 569W2B5A 82
- 569W2B7A 83
- 569W2B8A 83
- 569W2B9A 83
- 569W2C3A 85
- 569W2C4A 85
- 569W2C5A 85
- 569W2C7A 87
- 569W2C8A 87
- 2) Injection nozzle 89
- Nozzle Holder 89
- CHAPTER 3 91
- SPECIAL TOOLS 94
- 3. STRUCTURE AND OPERATION 95
- 3.3 OPERATION 96
- CHAPTER 3 8454 98
- 4.2 SEPARATING ENGINE AND 99
- CLUTCH HOUSING CASE 99
- ASSEMBLY 100
- 5. ADJUSTMENT OF PEDAL 101
- 6. INSPECTION AND REPAIR 102
- 569W318A 103
- 6.6 CLEARANCE BETWEEN CLUTCH 104
- PEDAL SHAFT AND CLUTCH 104
- PEDAL BUSHING 104
- TRANSMISSION SYSTEM 105
- 1. TROUBLESHOOTING 107
- CHAPTER 4 8454 108
- 2. SPECIFICATIONS 110
- 3. STRUCTURE 111
- 3.2 STRUCTURE 112
- 3.3 POWER TRAIN 113
- CHAPTER 4 8454 114
- 3.4 OPERATION 118
- First Stage 119
- Final Stage 120
- 569W418A 122
- 569W417A 122
- Inertial Brake 124
- ASSEMBLING TRANSMISSION 126
- Preparation 1 127
- Preparation 2 127
- Preparation 129
- Shift Levers 131
- Hydraulic Pipes 131
- 5.1 STANDARD TABLE FOR REPAIR 132
- 5.2 TO DISASSEMBLING AND TO 132
- ASSEMBLE 132
- Clutch Ass’y 147
- Clutch Disc, Steel Plate Wear 152
- Thickness of Seal Ring 153
- PTO Clutch Pack 153
- <Rear Axle Section> 154
- 6. DIFFERENTIAL GEAR 159
- 6.2 OPERATION 160
- Differential Gear 161
- Differential Lock 162
- Adjustment of BacKlash 164
- Confirmation of Reaching Up 165
- Side Gear 169
- • Differential Gear Assembly 169
- • Spiral Bevel Gear 170
- • Checking Bearing 171
- • Differential Side Gear 171
- Hub and Spline 172
- FRONT AXLE 175
- 3.2 FRONT WHEEL ALIGNMENT 181
- 3.3 TOE IN ADJUSTMENT 182
- 3.4 DIRECTION CONTROL ANGLE 182
- FOR THE FRONT WHEEL 182
- REAR DIRECTIONS 183
- 4.1 SEPARATING FRONT AXLE 184
- IMPORTANT: 184
- CHAPTER 5 8454 186
- 5.3 BEVEL GEAR CASE AND FRONT 188
- AXLE SUPPORT 188
- 5.4 FRONT AXLE SUPPORT AND 189
- DIFFERENTIAL GEAR CASE 189
- 5.5 FRONT DIFFERENTIAL GEAR 190
- Adjustment of Backlash 192
- 5.6 FRONT BRACKET 193
- 5.7 REAR BRACKET 194
- HYDRAULIC SYSTEM 195
- CHAPTER 6 8454 198
- 1.1 TROUBLESHOOTING 199
- 1.2 SPECIFICATIONS 200
- 1.3 STRUCTURE AND OPERATION 203
- Hydraulic Oil Flow 204
- Drawbar Pull 214
- (Fig. 569W616A,569W617A) 214
- 1.4 PREPARATION STAGE FOR 219
- DISASSEMBLING AND 219
- ASSEMBLING 219
- 1.5 DISASSEMBLING AND 221
- Arm Shaft and Bush 228
- Dimension 229
- Draft Control Lever 230
- 2. PTO CLUTCH VALVE SYSTEM 232
- 2.2 STRUCTURE AND OPERATION 233
- 2.4 TO CHECK AND TO REPAIR 240
- 3. POWER STEERING SYSTEM 241
- 3.2 INTRODUCTION 242
- Oil Flow 243
- 3.3 STRUCTURE AND OPERATION 244
- Right Turn 247
- Neutral Position 247
- IMPORTANT 249
- 569W687A 256
- 569W688A 256
- 4. HYDRAULIC PUMP 260
- 4.3 STRUCTURE AND OPERATION 261
- 5. HYDRAULIC FILTER 265
- AND TROUBLE SHOOTING 267
- 6.2 STEERING DEVICE 269
- 6.3 PTO SYSTEM 271
- CHAPTER 7 281
- 3. TIGHTENING TORQUE 284
- 4. STRUCTURE AND OPERATION 285
- CHAPTER 7 8454 286
- 4.2 OPERATION 287
- 5.1 DRAINING THE TRANSMISSION 288
- 5.2 SEPARATING PANEL FRAME 289
- Rear Axle Case 294
- Figure Above 295
- Brake Case 295
- Brake Pedal Free Play 296
- 7. SERVICING 297
- Brake Disc Wear 298
- Brake Dise Wear 298
- ELECTRIC SYSTEM 299
- 1. ELECTRONIC INSTRUMENTATION 301
- CHAPTER 8 8454 302
- ELECTRICAL SYSTEM 303
- 2. TROUBLE SHOOTING 304
- 3. SERVICING SPECIFICATIONS 306
- 4. MECHANISM 307
- 4.2 CHARGING SYSTEM 310
- 4.3 PREHEATING SYSTEM 312
- 4.4 FUSE 313
- 4.5 GAUGE AND SENSORS 314
- CABIN SYSTEM 315
- 1. DISASSEMBLY AND ASSEMBLY 317
- CHAPTER 9 8454 318
- Precautions When Assembling 322
- 3. AIRCONDITIONER 323
- 3.2 TROUBLE SHOOTING 327
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