Tadano Faun GR-250N-2 Rough Terrain Crane Service Manual SN FB4745 – PDF DOWNLOAD

Description

Tadano Faun GR-250N-2 Rough Terrain Crane Service Manual SN FB4745 – PDF DOWNLOAD

FILE DETAILS:

Tadano Faun GR-250N-2 Rough Terrain Crane Service Manual SN FB4745 – PDF DOWNLOAD

Language : English
Pages : 495
Downloadable : Yes
File Type : PDF

TABLE OF CONTENTS:

Tadano Faun GR-250N-2 Rough Terrain Crane Service Manual SN FB4745 – PDF DOWNLOAD

GR-250N-2 1
Safety 2
1 Fundamental cautions 3
2 Cautions in working 3
2 1 General 3
2 2 Dismounting and disassembling 4
2 3 Remounting and assembling 4
3 Cautions in operation 4
3 1 Brake fluid replenishment 4
3 2 Handling of battery 4
3 3 Handling of radiator 5
3 4 Cooling fan 5
4 About waste disposal 5
4 1 Gasoline 5
4 2 Hydraulic oil 5
4 3 Motor oil 5
Foreword 6
1 Applicable Spec and serial number 6
2 Separate service manual 6
3 External view 7
4 Conversion table 8
5 Outline of specifications 10
6 Group index 12
7 Contents 13
(B) Hydraulic Power Generating System 23
B-1 Hydraulic Power Generating System 26
1 Function 26
1 1 Hydraulic pump 26
1 2 Solenoid control valve (outriggers and hydraulic suspension) 26
1 3 Center joint 26
1 4 Hydraulic pilot control valve (jib, boom elevation, boom telescoping, main winch, auxiliary winch) 26
1 5 Solenoid control valve (compound valve) 26
2 Hydraulic system description 27
2 1 Pump (P1) circuit 27
2 2 Pump (P2) circuit 27
2 3 Pump (P3) circuit 27
2 4 Pump (P4) circuit 27
2 5 Pump (P5) circuit 27
B-2 Hydraulic Pump (Double Variable Displacement Pump)（–FB5953） 28
1 Structure 28
1 1 General view 28
1 2 Pump main body 29
1 3 Regulator 30
2 Operation 32
2 1 Regulation of flow by discharging pressure 32
2 2 Regulation of flow rate by external pilot(positive control) 35
3 Disassembly 38
3 1 Disassembly of the regulator 38
3 2 Disassembly of the pump main body 40
4 Assembly 41
4 1 Assembly of the pump main body 41
4 2 Assembly of the regulator 43
5 Maintenance standards 45
5 1 Replacement standards for parts subject to wear 45
5 2 Correction standards for parts subject to wear 46
5 3 Tightening torque 46
6 Test 46
6 1 Operation test 46
B-3 Hydraulic Pump (Double Variable Displacement Pump)（FB5954–） 47
1 Structure 47
1 1 General view 47
1 2 Pump main body 48
1 3 Regulator 49
2 Operation 51
2 1 Regulation of flow by discharging pressure 51
2 2 Regulation of flow rate by external pilot(positive control) 54
3 Disassembly 57
3 1 Disassembly of the regulator 57
3 2 Disassembly of the pump main body 59
4 Assembly 60
4 1 Assembly of the pump main body 60
4 2 Assembly of the regulator 62
5 Maintenance standards 64
5 1 Replacement standards for parts subject to wear 64
5 2 Correction standards for parts subject to wear 65
5 3 Tightening torque 65
6 Test 65
6 1 Operation test 65
B-4 Hydraulic Pump (Triple Fixed Displacement Pump) 66
1 Structure 66
B-5 Hydraulic Pump (Gear Pump, Emergency Steering) 69
1 Structure 69
B-6 Center Joint 70
1 Structure 70
1 1 General view 70
1 2 Port size table 72
1 3 Center joint (hydraulics and pneumatics) 73
1 4 Center joint (heated water) 75
2 Slip ring 76
2 1 General view 76
2 2 Harness and connector 77
2 3 Maintenance of ring and brush 77
2 4 Replacing the potentiometer 78
3 Removal 79
4 Mounting 79
B-7 Hydraulic Pilot Control Valve (2M2D, Power Tilt Jib) 80
1 Structure 80
1 1 Hydraulic symbol 80
1 2 External view 81
1 3 General view 82
1 4 Winch selection assy (Component 1 of “1 3 General view”) 86
1 5 Telescoping selection assy (Component 2 of “1 3 General view”) 88
1 6 Elevating selection assy (Component 3 of “1 3 General view”) 89
1 7 Jib selection assy (Component 4 of “1 3 General view”) 90
1 8 Unloading valve assy (Component 7 of “1 3 General view”) 91
1 9 Unloading relief valve assy (Component 8 of “1 3 General view”) 92
1 10 Overload relief valve assy (Components 10, 12 of “1 3 General view”) 93
1 11 Overload relief valve assy (Components 11, 13, 14 of “1 3 General view”) 94
B-8 Solenoid Control Valve (Compound Valve) 95
1 Structure 95
1 1 Hydraulic symbols 95
1 2 External view 96
1 3 General view 97
1 4 Supply section assy (Component 1 of “1 3 General view”) 98
1 5 Pilot section assy (Component 3 of “1 3 General view”) 100
1 6 Selector section assy (Component 4 of “1 3 General view”) 102
1 7 Reducing valve assy (Component 7 of “1 3 General view”) 103
1 8 Overload relief valve assy (Component 8 of “1 3 General view”) 104
B-9 Check Valve (Gauge lsolator) 105
1 Structure 105
B-10 Relief Valve (Air conditioner)(–FB6352) 106
1 Structure 106
2 Relief cartridge 107
(C) Outrigger System 108
C-1 Outrigger System 110
1 Function 110
1 1 Solenoid control valve(outriggers and hydraulic suspension) 110
1 2 Solenoid valve (slide/Jack) 110
1 3 Jack cylinder 110
1 4 Pilot check valve (jack cylinder retraction prevention) 110
1 5 Extension cylinder 110
1 6 Pilot check valve(jack/slide extension prevention) 110
2 Hydraulic system description 110
2 1 Outrigger extension operation 110
2 2 Outrigger retraction operation 110
3 Electric system 111
3 1 Outrigger operation inside operation cab 111
3 2 Outrigger operation outside operation cab 112
C-2 Solenoid Control Valve (Outriggers and Hydraulic Suspension) 113
1 Structure 113
1 1 Control valve assy 114
1 2 P cover assy 115
1 3 Body assy 116
1 4 Pilot cover assy 117
1 5 Valve block assy 118
1 6 Body assy 119
1 7 PT cover assy 120
C-3 Solenoid Valve (Slide/Jack) (Rexroth (UCHIDA)) 121
1 Structure 121
C-4 Solenoid Valve (Slide/Jack) (TOKIMEC) 122
1 Structure 122
C-5 Solenoid Valve (Slide/Jack) (NACHI) 123
1 Structure 123
C-6 Jack Cylinder (X Type)(–FB5655, FB5993–) 124
1 Structure 124
C-7 Jack Cylinder (X Type)(FB5656–FB5992) 125
1 Structure 125
C-8 Pilot check Valve (X Type, Jack Retraction Prevention) 126
1 Structure 126
C-9 Extension Cylinder (X Type)(–FB6106) 127
1 Structure 127
C-10 Extension Cylinder (X Type)(FB6107–) 128
1 Structure 128
C-11 Jack Cylinder (H Type) 129
1 Structure 129
C-12 Pilot check Valve (H Type, Jack Retraction Prevention) 130
1 Structure 130
C-13 Extension Cylinder (H Type) 131
1 Structure 131
C-14 Pilot check Valve (Slide/Jack Extension Prevention)(– FB5924) 132
1 Structure 132
C-15 Pilot check Valve (Slide/Jack Extension Prevention)(FB5925 –) 134
1 Structure 134
(D) Swing System 136
D-1 Swing System 137
1 Function 137
1 1 Swing drive unit (hydraulic motor and swing speed reducer) 137
1 2 Hydraulic pilot control valve (swing) 137
1 3 Solenoid valve (swing brake release) 137
1 4 Swing free function 137
1 5 Automatic swing stop function 137
2 Hydraulic system description 137
D-2 Hydraulic Pilot Control Valve 138
1 Structure 138
1 1 Hydraulic symbols 138
1 2 External view 139
1 3 Internal structural view 140
D-3 Hydraulic Motor (Swing) 145
1 Structure 145
D-4 Swing Speed Reducer 147
1 Structure 147
D-5 Swing Assembly 149
1 Structure 149
2 Mounting 150
2 1 Swing bearing inner ring and center joint 150
2 2 Swing bearing outer ring 151
(E) Boom Elevating System 152
E-1 Elevating System 153
1 Function 153
1 1 Elevating cylinder 153
1 2 Counterbalance valve 153
1 3 Pressure sensor 153
1 4 Elevating speed control function 153
1 5 Elevation slow stop/cancel selection 153
2 Hydraulic system description 153
E-2 Elevating Cylinder(– FB6093) 154
1 Structure 154
E-3 Elevating Cylinder(FB6094 –) 156
1 Structure 156
E-4 Counterbalance Valve (Elevating) 158
1 Structure 158
2 Function 160
2 1 When control valve is at the neutral position 160
2 2 While actuator is being pushed up 160
2 3 While actuator descends 160
E-5 Pressure Sensor 161
1 Structure 161
1 1 Internal section 161
1 2 Connection diagram 161
1 3 Specification 161
1 4 Conversion used by AML from sensor output voltage into hydraulic pressure 161
(F) Winch System 162
F-1 Winch System 164
1 Function 164
1 1 Hydraulic motor 164
1 2 Counterbalance valve 164
1 3 Hydraulic valve (winch brake) 164
1 4 Solenoid valve (High speed hoisting down) 164
1 5 Pressure sensor (for gauge isolator) 164
2 Hydraulic system description 164
3 High speed hoisting down circuit 165
3 1 Electric circuit 165
3 2 Hydraulic circuit 165
F-2 Winch(Main Winch/Aux Winch) 166
1 Structure 166
1 1 General view 166
1 2 Reducer 167
1 3 Removing the winch 168
F-3 Hydraulic Motor and Counterbalance Valve（Main winch, Aux winch） 169
1 Structure 169
1 1 Hydraulic symbol 169
1 2 General view 169
1 3 Hydraulic motor assy 171
2 Description of operation 174
2 1 High/low speed selection 174
2 2 Mechanical brake 174
2 3 Counterbalance valve 175
3 Troubleshooting 177
4 Disassembly procedure of motor 178
4 1 Washing hydraulic motor 178
4 2 Mounting hydraulic motor on a workbench 178
4 3 Draining gear oil 178
4 4 Removing cover [113] 178
4 5 Removing sun gear-1 [104] 179
4 6 Removing carrier assy 179
4 7 Removing planetary gear-2 [107] 180
4 8 Removing counterbalance valve 180
4 9 Removing rear flange [401] 181
4 10 Removing rear flange [401] attachment 182
4 11 Disassembling internal counterbalance valve 183
4 12 Disassembling counterbalance valve section 183
4 13 Disassembling hydraulic motor 184
4 14 Removing spring [214] of cylinder block [204] 186
4 15 Removing pivot, 2nd-speed piston kit (piston [261] and shoe [262]) 186
4 16 Removing tapered roller bearing 187
4 17 Disassembling spindle [102] 187
4 18 Removing angular ball bearing 188
4 19 Removing accessories attached to spindle [102] 188
4 20 Primal washing 189
4 21 Final washing 189
5 Maintenance standards 190
5 1 Seal 190
5 2 Maintenance standards for parts subject to wear 190
6 Assembly 192
6 1 Preparation 192
6 2 General suggestion for work 192
6 3 Assembly procedure 192
7 Performance confirmation test 198
7 1 Required measurement instruments 198
7 2 Test procedure 198
8 Classifications of clearance adjustment parts 199
F-4 Hydraulic Valve (Automatic Brake) (– FB5392) 200
1 Structure 200
F-5 Hydraulic Valve (Automatic Brake) (FB5393–FB6314) 202
1 Structure 202
F-6 Hydraulic Valve (Automatic Brake)(FB6315 –) 204
1 Structure 204
F-7 Solenoid Valve (Winch High Speed Selection) 206
1 Structure 206
F-8 Accumulator (Winch Brake) 208
1 Structure 208
2 Relieving pressure in accumulator circuit 209
3 Checking the accumulator 209
4 Removing the accumulator 209
F-9 Pressure Sensor 210
1 Structure 210
1 1 Internal section 210
1 2 Connection diagram 210
1 3 Specification 210
1 4 Conversion used by AML from sensor output voltage into hydraulic pressure 210
(G) Boom Telescoping System 211
G-1 Telescoping System 213
1 Function 213
1 1 Telescoping cylinder 213
1 2 Counterbalance valve(telescoping cylinder) 213
1 3 Jib tilt cylinder 213
1 4 Counterbalance valve(jib tilt cylinder) 213
1 5 Pilot check valve(jib sideup cylinder) 213
1 6 Hose reel (jib) 213
2 Boom telescoping mechanism 214
G-2 Boom 215
1 Structure 215
1 1 Boom assy 215
Boom assy (1/2) 215
Boom assy (2/2) 216
2 Disassembly 218
2 1 Removing the 2nd – top boom section 218
2 2 Removing the telescoping cylinder 220
2 3 Removing the 3rd – top boom section 221
2 4 Removing the top boom section 222
3 Check 224
3 1 Boom 224
3 2 Slide plate 224
3 3 Sheave 224
3 4 Boom telescoping wire rope 224
4 Reassembly 224
4 1 Greasing 224
4 2 Installing anti-buckling bolts for telescoping cylinders 224
5 Adjustment 225
5 1 Adjusting clearance for the boom 225
5 2 Adjusting boom telescoping wire ropes 228
6 Test 229
6 1 Operation Test 229
6 2 Boom lateral warp test 229
6 3 Other functional test 229
G-3 Jib (Power tilt) 230
1 Structure 230
2 Jib main body 232
3 Jib assy assembly procedure 234
G-4 Telescoping Cylinder 235
1 Structure 235
G-5 Counterbalance Valve (Telescoping) 237
1 Structure 237
G-6 Jib Tilt Cylinder 238
1 Structure 238
G-7 Counterbalance Valve (Jib Tilt Cylinder) (– FB5795) 239
1 Structure 239
G-8 Counterbalance Valve (Jib Tilt Cylinder) (FB5796 –) 241
1 Structure 241
G-9 Pilot Check Valve (Jib Tilt Cylinder) (– FB6028) 243
1 Structure 243
G-10 Pilot check Valve (Jib Tilt Cylinder) (FB6029 –) 244
1 Structure 244
G-11 Jib Offset Cylinder 245
1 Structure 245
G-12 Pilot Check Valve (Jib Set) 246
1 Structure 246
G-13 Hose Reel (Jib) 247
1 Structure 247
2 Installation 248
3 Disassembly 248
4 Assembly 249
(H) Safety System 250
H-1 Safety System 251
1 Function of Safety devices 251
1 1 Moment detector (pressure sensor) 251
1 2 Boom length and angle detector 251
1 3 Outrigger extension width detector 251
1 4 Swing angle detector 251
1 5 Other detectors and switches 251
1 6 AML main body 251
1 7 Overwind cutout (anti-twoblock) device 251
1 8 Solenoid valve (AML vent) 251
2 System description 251
H-2 Boom Length and Angle Detector 252
1 Structure and function 252
2 Disassembly and reassembly 254
2 1 Disassembling boom length and angle detector 254
2 2 Reassembling boom length and angle detector 255
2 3 Replacing spiral spring 258
2 4 Disassembling the potentiometer (for boom length detector) 258
2 5 Reassembling potentiometer 258
2 6 Replacing the boom angle detector 259
3 Adjustment 259
H-3 Outrigger Extension Length Detector 260
1 Structure and function 260
2 Disassembly 261
3 Reassembly 262
H-4 Solenoid Valve (AML Vent) 264
1 Structure 264
H-5 Length Detector (Jib Offset Angle) 266
1 Structure and function 266
2 Disassembly 267
3 Reassembly 268
4 Installation 270
(K) Cab 271
K-1 Crane Cab Glass 273
1 Glass replacement procedure 273
2 Bonding the joint between windshield glass and roof glass 274
K-2 Air Conditioner 275
1 Component parts 275
2 Introduction to air conditioning 276
2 1 Principle of air conditioning 276
3 Basic refrigeration cycle 277
3 1 Structure 277
3 2 Conditions for air conditioning equipment 278
3 3 Refrigerant 279
3 4 Refrigeration cycle of a car air conditioner 280
3 5 Comparison with a household air conditioner 280
3 6 Receiver functions 281
3 7 Reheat method (flow control valve) 282
4 Layout 283
4 1 Overall layout(– FB5852) 283
4 2 Overall layout(FB5853 –) 284
4 3 Evaporator section 285
5 Important points for assembly (layout) 286
5 1 Seal during part installation work 286
5 2 Piping connections 286
5 3 Vacuum method 286
5 4 Charging with refrigerant 286
5 5 Check for gas leakage and amount of refrigerant charge 287
5 6 Heated water circuit 287
5 7 Run-in operation 287
5 8 Bolt size and tightening torque 287
6 Electric 288
6 1 Electric circuit 288
6 2 Wiring system diagram 289
6 3 Harness (inside cab) 290
6 4 Harness (outside cab) 291
6 5 Control table 292
7 Control 293
7 1 Oil 293
7 2 V-belt 293
7 3 A/C operation after a long period of no operation 293
K-3 Hydraulic Motor (Air Conditioner) 294
1 Structure 294
K-4 Solenoid Valve (Air Conditioner)(– FB6352) 296
1 Structure 296
K-5 Solenoid Valve (Air Conditioner)(FB6353 –) 298
1 Structure 298
(L) Control System 300
L-1 Inside Cab Control Device 301
1 Crane control 301
2 Driving control 303
3 Other control device 305
L-2 Shift Switch 306
1 Structure 306
2 Electric circuit 309
L-3 Solenoid Valve (2/4 Wheel Drive Shift) (Air) 310
1 Structure 310
L-4 Remote Control Valve (Crane Operation) 312
1 Structure 312
L-5 Solenoid Valve (Boom Telescoping / Aux Winch)(–FB6204) 315
1 Structure 315
L-6 Solenoid Valve (Telescoping/Jib Selection)(FB6205–) 317
1 Structure 317
L-7 Proportional Control Valve (Elevation Slow Stop) 319
1 Structure 319
L-8 Accelerator Sensor 321
1 Structure 321
1 1 External view 321
1 2 Connection diagram 321
2 Conceptual diagram of accelerator sensor output 322
L-9 Idle Volume 323
1 Structure 323
1 1 External view 323
1 2 Output characteristic diagram 323
(N) Electrical System 324
N-1 Display Control Unit (DCU) 326
1 System configuration 326
2 Structure and function 327
3 Connector (pin assignment) 328
4 Input/output signal list 333
5 Data list 336
5 1 Engine speed pulse output 336
5 2 Vehicle speed signal pulse output 336
5 3 One-to-one correspondence input/output function 337
5 4 Integration for hour meter(for Telematics) 338
5 5 Integration for odometer (for Telematics) 338
5 6 Actual value conversion formula 339
5 7 PWM output 340
5 8 CAN communication 341
5 9 Integrated value rewriting function 341
6 AML adjustment at DCU replacement 342
N-2 Combination Meter 343
1 System configuration 343
2 Display section 344
3 Specifications 346
3 1 Speedometer 346
3 2 Tachometer 346
3 3 Odo/trip meter, hour meter 346
3 4 Odometer 346
3 5 Trip meter 346
3 6 Hour meter 346
3 7 Fuel gauge 347
3 8 Coolant temperature gauge 347
3 9 Air pressure gauge 348
3 10 Torque converter oil temperature gauge 348
4 Electric circuit 349
N-3 Signal Transmitter (STM-D) 351
1 System configuration 351
2 Structure and function 352
3 Connector 353
4 LED display 353
5 Failure diagnosis 354
N-4 Cord Reel (for Jib) 356
1 Construction and functions 356
2 Removal and installation 357
3 Disassembly 357
4 Reassembly 359
N-5 Signal Transmitter (STM-E) 363
1 System configuration 363
2 Structure and function 364
3 Connector (pin assignment) 365
4 LED display 365
5 Input/output signal list 366
6 Data list 367
6 1 One-to-one correspondence input/output function 367
6 2 Integration function for remaining fuel amount 368
6 3 CAN communication 369
6 4 K-LINE communication specifications 370
N-6 Outrigger Control Box 371
1 Structure 371
2 Control box diagram 372
3 Specifications 372
3 1 General 372
3 2 Bipolar toggle switch 372
3 3 Monopolar toggle switch 372
3 4 Push switch 372
3 5 Diode 372
3 6 Lamp assembly 372
N-7 Engine Control Unit (ECU) 373
1 System configuration 373
2 Failure diagnosis function 374
2 1 Check for a failure (user mode) 374
2 2 Diagnosis lamp lighting law when a failure is detected 374
2 3 Recalling malfunction locations 375
2 4 Diagnosis code format 375
2 5 Erasing the malfunction locations 375
2 6 Diagnosis lamp bulb burn-out check 375
2 7 Diagnosis code chart 376
(R) Driving Power Transmission System 379
R-1 Driving Power Transmission System 380
1 Function 380
1 1 Engine 380
1 2 Torque converter 380
1 3 Transmission 380
1 4 Axles 380
2 System description 380
2 1 Torque converter circuit 380
2 2 PTO clutch 381
2 3 Lockup clutch 381
2 4 Shift of drive mode 381
3 Installation 382
3 1 Radiator 382
3 2 Power train 383
(S) Steering System 385
S-1 Steering System 387
1 Function 387
1 1 Priority valve 387
1 2 Orbitrol 387
1 3 Steering cylinder 387
1 4 Solenoid valve (steering mode) 387
1 5 Solenoid valve (steering lock) 387
1 6 Hydraulic valve (emergency steering) 387
1 7 Air cylinder (steering lock) 387
1 8 Pilot check valve (rear steering hydraulic lock) 387
2 Hydraulic system description 388
S-2 Priority Valve 389
1 Structure 389
2 Function 389
3 Principle of operation 390
3 1 Neutral state 390
3 2 Right steering 390
3 3 Right steering to the end 390
S-3 Orbitrol 391
1 Structure and functions 391
1 1 Housing 391
1 2 Spool and sleeve 393
1 3 Drive 393
1 4 Rotor set 393
2 Operation 394
2 1 Neutral state 394
2 2 Right steering 395
2 3 Left steering 396
3 Disassembly 397
3 1 Rotor section 397
3 2 Control section 398
4 Check 399
5 Reassembly 399
5 1 Control section 399
5 2 Rotor section 401
S-4 Steering Cylinder 403
1 Structure 403
S-5 Solenoid Valve (Steering Mode) 404
1 Structure 404
S-6 Solenoid Valve (Steering Lock) (Air) 408
1 Structure 408
S-7 Hydraulic Valve (Emergency Steering) 409
1 Structure 409
S-8 Air Cylinder (Steering Lock) 411
1 Structure 411
S-9 Pilot Check Valve (Rear Steering Hydraulic Lock) 412
1 Structure 412
(T) Brake System 413
T-1 Brake System 416
1 Function 416
1 1 Brake 416
1 2 Brake valve 416
1 3 Booster 416
1 4 Air dryer 416
1 5 Reducing valve 416
1 6 Brake chamber 416
1 7 Parking brake 416
1 8 Solenoid valve (exhaust brake) 416
1 9 Solenoid valve (the 3rd brake) 416
1 10 Solenoid valve (parking brake) 416
1 11 Quick release valve 416
1 12 Retarder (permanent magnet type) 416
2 System Description 417
2 1 Service brake 417
2 2 Parking brake 417
2 3 The 3rd brake (auxiliary brake for crane control) 417
2 4 Exhaust brake 417
T-2 Brake Valve 418
1 Structure and function 418
2 Description of operation 420
2 1 Generation of air pressure 420
2 2 Stabilization of air pressure 420
2 3 Release of air pressure 421
2 4 Operation under piping rupture 422
3 Dismounting and remounting 422
4 Disassembly 423
4 1 Disassembly of the mount plate 423
4 2 Disassembly of the body 423
5 Cleaning and checking 424
5 1 Cleaning 424
5 2 Checking 425
6 Reassembly 425
6 1 Reassembly of the secondary side 425
6 2 Reassembly of the primary side 425
6 3 Reassembly of the mount plate 427
7 Test 427
7 1 Air leakage through supply valve and exhaust valve 427
7 2 Air leakage in other parts 427
7 3 Operation test 427
7 4 Performance test 427
8 Maintenance standard 428
8 1 600-hour check 428
8 2 1200-hour or 1-year check 428
T-3 Booster 429
1 Structure 429
2 Function 432
2 1 Relay valve 432
2 2 Air cylinder 432
2 3 Oil cylinder 432
3 Explanation of relay valve operation 433
3 1 Relay valve not in operation 433
3 2 Relay valve in operation 433
3 3 Relay valve released 434
4 Operation of cylinder 435
4 1 Booster not in operation 435
4 2 Booster in operation 435
4 3 Brakes released 435
5 Removing of booster 435
6 Disassembly 436
6 1 Disassembly of relay valve 436
6 2 Disassembly of cylinder 437
7 Check 438
7 1 Rubber parts 438
7 2 Relay valve 438
7 3 Air cylinder 438
7 4 Oil cylinder 438
8 Reassembly 439
9 Test 440
9 1 Airtightness test of fluid pressure side 440
9 2 Oil injection and air bleeding 440
9 3 Airtightness test during non-operation 440
9 4 Airtightness test during operation 440
9 5 Operating characteristics test 440
9 6 Air piston assy return time 441
10 Maintenance standards 441
10 1 Daily check 441
10 2 1200-hour or 1-year check 441
T-4 Air Dryer 442
1 Structure 442
2 Function 446
2 1 Dehumidification 446
2 2 Regeneration 447
2 3 Intake position 448
2 4 Release position 448
3 Precautions for handling 449
4 Maintenance and inspection 449
4 1 Daily inspection 449
4 2 Inspection and part replacement every 1 year or 100,000 km (62,140 mi) of driving 450
5 Disassembly 450
5 1 Removing DU-3 450
5 2 Disassembly of cartridge 450
6 Reassembly 452
6 1 Cartridge (lower) 452
6 2 Tamping the desiccant 453
6 3 Cartridge (upper) 453
7 Troubleshooting 454
T-5 Reducing Valve 457
1 Structure 457
2 Principle of operation 457
3 Dismounting 457
4 Disassembly 457
5 Cleaning and checking 458
6 Reassembly 458
7 Test 458
7 1 Operation test 458
7 2 Air leak test 458
8 Maintenance standard 458
8 1 600-hour or 6-month check 458
8 2 1200-hour or 1-year check 458
T-6 Brake Chamber 459
1 Structure 459
2 Function 460
3 Disassembly 460
4 Cleaning and checking 461
4 1 Cleaning 461
4 2 Checking 461
5 Reassembly 462
6 Test 462
6 1 Air leak test 462
7 Maintenance standards 462
7 1 1200-hour or 1-year check 462
T-7 Solenoid Valve (Parking Brake) (Air) 463
1 Structure 463
T-8 Quick release valve (Parking Brake)(Air) 465
1 Structure 465
(U) Suspension System 466
U-1 Suspension System 467
1 Function 467
1 1 Suspension cylinder 467
1 2 Torque rod 467
1 3 Vehicle height detection switch 467
1 4 Solenoid valve (vehicle height adjustment) 467
1 5 Solenoid valve (free/lock) 467
1 6 Solenoid control valve(outriggers and hydraulic suspension) 467
1 7 Pilot check valve(suspension cylinder) 467
1 8 Accumulator 467
2 System description 468
2 1 Outline of hydropneumatic suspension 468
2 2 Function of hydropneumatic suspension 468
3 Installation 469
3 1 Front suspension 469
3 2 Rear suspension 472
3 3 Vehicle height detection switch 475
U-2 Suspension Cylinder 477
1 Structure 477
U-3 Solenoid Valve (Vehicle Height Adjustment) 478
1 Structure 478
1 1 Hydraulic symbol 478
1 2 General view 479
U-4 Solenoid Valve (Free/Lock) 484
1 Structure 484
2 Solenoid valve 485
U-5 Pilot Check Valve (Suspension Cylinder) 486
1 Structure 486
U-6 Accumulator 488
1 Structure and function 488
2 Accumulator circuit depressurizing procedure 489
3 Removing the accumulator 489
4 Checking the nitrogen gas charging pressure 490
5 Nitrogen gas charging procedure 491
5 1 Preparation 491
5 2 Charging the nitrogen gas 491
6 Core replacement procedure 493
6 1 Disassembly of core 493
6 2 Reassembly of core 494
7 Maintenance standards 494
History of revision 495

DESCRIPTION:

Tadano Faun GR-250N-2 Rough Terrain Crane Service Manual SN FB4745 – PDF DOWNLOAD

Safety:

Most accidents that occur during machine operation and maintenance are caused by failure to observe basic safety rules and precautions. Before operating your machine or performing maintenance, read and become familiar with all the safety precautions and recommendations given in this section.

• Remember that failure to observe even a single precaution could involve you and the people around the machine in a serious accident.
• Foreseeing potential dangers is vital for preventing accidents. All personnel working with the machine, including the supervisor, machine operator and oiler, should be sensitive to potentially dangerous situations and take the necessary measures to prevent accidents.
• Safety precautions and recommendations are outlined in this section and are also included in the operation and maintenance instructions given in subsequent sections. Warning labels are also provided on the machine.

1. Fundamental cautions
Servicemen inexperienced in the units of this machine should be cautious about safety operations. They must acquire sufficient knowledge about the equipment before dismounting and disassembling it. Before dismounting each component, a serviceman should read this service manual thoroughly and find out the weight of the component, then lift it by proper means.

The following are cautions to be observed all the time.

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PLEASE NOTE:

• This is the same manual used by the dealers to diagnose and troubleshoot your vehicle
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