Bobcat 953 Loader Service Manual 6724352 (02-20) – PDF DOWNLOAD

Description

Bobcat 953 Loader Service Manual 6724352 (02-20) – PDF DOWNLOAD

FILE DETAILS:

Bobcat 953 Loader Service Manual 6724352 (02-20) – PDF DOWNLOAD

Language : English
Pages : 344
Downloadable : Yes
File Type : PDF

TABLE OF CONTENTS:

Bobcat 953 Loader Service Manual 6724352 (02-20) – PDF DOWNLOAD

MAINTENANCE SAFETY 3
CONTENTS 5
FOREWORD 6
SAFETY INSTRUCTIONS 9
SERIAL NUMBER LOCATIONS 11
LOADER SERIAL NUMBER 11
ENGINE SERIAL NUMBER 11
DELIVERY REPORT 11
953 BOBCAT LOADER IDENTIFCATION 12
OPTIONS AND ACCESSORIES 13
PREVENTIVE MAINTENANCE 15
SERVICE SCHEDULE 17
LIFTING AND BLOCKING THE LOADER 18
Procedure 18
TRANSPORTING THE LOADER 19
Procedure 19
TOWING THE LOADER 19
Procedure 19
LIFT ARM SUPPORT DEVICE 20
Engaging the Lift Arm Support Device 20
Disengaging the Lift Arm Support Device 20
OPERATOR CAB 21
Description 21
Raising the Operator Cab 21
Lowering the Operator Cab 22
Emergency Exit 22
SEAT BAR RESTRAINT SYSTEM 23
Description 23
Seat Bar Inspection 23
Seat Bar Maintenance 23
REAR DOOR 24
Opening the Rear Door 24
Adjusting the Rear Door Latch 24
AIR CLEANER SERVICE 25
Replacing Filter Element 25
FUEL SYSTEM 27
Fuel Specifications 27
Filling the Fuel Tank 27
Fuel Filter 27
In–Line Fuel Filter 28
ENGINE LUBRICATION SYSTEM 29
Checking Engine Oil 29
Replacing of Oil and Filter 29
ENGINE COOLING SYSTEM 30
Checking the Coolant Level 30
Propylene Glycol 30
Cleaning the Cooling System 30
Removing Coolant From the Cooling System 31
ALTERNATOR BELT 32
Adjusting the Alternator Belt 32
USING A BOOSTER BATTERY (JUMP STARTING) 33
Procedure 33
HYDRAULIC/HYDROSTATIC SYSTEM 34
Checking and Adding Fluid 34
Hydraulic/Hydrostatic Filter Replacement 34
Case Drain Filter 35
Hydraulic Fluid Replacement 35
SPARK ARRESTOR MUFFLER 36
Cleaning Procedure 36
EXHAUST GAS PURIFIER (Optional) 36
Function 36
Cleaning the Exhaust Gas Purifier 36
TIRE MAINTENANCE 37
Wheel Nuts 37
Tire Rotation 37
Tire Mounting 37
FINAL DRIVE TRANSMISSION (CHAINCASE) 38
Checking and Adding Oil 38
LUBRICATING THE LOADER 39
Procedure 39
REMOTE START SWITCH 41
Procedure 41
HYDRAULIC SYSTEM 43
HYDRAULIC / HYDROSTATIC SCHEMATICS 45
TROUBLESHOOTING 53
HYDRAULIC SYSTEM INFORMATION 54
Flare Connections 54
O–Ring Face Seal Connection 54
Straight Thread O–Ring Fitting 54
Tubelines and Hoses 54
LIFT CYLINDER 55
Checking the Lift Cylinder(s) 55
Removal and Installation 55
Installation 56
TILT CYLINDER 56
Checking the Tilt Cylinder(s) 56
Removal and Installation 57
Tilt Cylinder Base End Pivot Pin 58
HYDRAULIC CYLINDER REPAIR 59
Disassembly 59
Assembly 61
Base and Rod End Seals 64
JUNCTION PORT BLOCK 65
Removal and Installation 65
QUICK COUPLERS (BRUNING) 66
Disassembly and Assembly 66
HYDRAULIC CONTROL VALVE 69
Removal and Installation 69
Remove Bucket Position Valve 69
Disassembly and Assembly 70
Valve Spool Linkage End O–ring (All Valve Sections) 72
Disassembly and Assembly 72
Lift Section Detent and Spool 73
Front Auxiliary Detent 75
Tilt and Rear Auxiliary Centering Spring 77
Anti–Cavitation Valve 78
Port Relief 79
CHARGE PUMP 80
Removal and Installation 80
Disassembly and Assembly 80
HYDRAULIC PUMP 84
Removal and Installation 84
Disassembly and Assembly 84
Inspection 89
HYDRAULIC RESERVOIR 90
Removing Fluid from the Reservoir 90
Removal and Installation 90
HYDRAULIC FILTER 91
Removal and Installation 91
Disassembly and Assembly 92
PORT BLOCK 93
Removal and Installation 93
Disassembly and Assembly 95
BUCKET POSITION VALVE 98
Removal and Installation 98
Disassembly and Assembly 99
FAN MOTOR 101
Removal and Installation 101
Disassembly and Assembly 106
HYDROSTATIC SYSTEM 109
TROUBLESHOOTING 111
LIFT AND TILT PEDALS 112
Removal and Installation 112
Pedal Cable Control Linkage 113
Pedal Lock Linkage 114
Adjustment 114
STEERING LEVERS AND SHAFT 115
Removal and Installation 115
HYDROSTATIC MOTOR 119
Removal and Installation 119
Disassembly and Assembly 120
Inspection 122
HYDROSTATIC PUMP 123
High Pressure and Replenishing Valves 123
Checking the High Pressure Relief Replenishing Valve 123
Checking Charge Relief Pressure 123
Removal and Installation 124
Disassembly and Assembly 127
Inspection 136
Neutral Adjustment 138
HYDROSTATIC FILTER 140
Removal and Installation 140
Disassembly and Assembly 141
Case Drain Filter 141
DRIVE BELT 142
Removal and Installation 142
Adjustment 143
DRIVE BELT TENSION PULLEY 144
Removal and Installation 144
CONTROL PANEL 147
Removal and Installation 147
DRIVE SYSTEM 149
PARKING BRAKE 151
Removal and Installation 151
Disassembly and Assembly 151
PARKING BRAKE DISC 152
Removal and Installation 152
AXLE SEAL AND WEAR RING 155
Removal and Installation 155
FRONT AXLE AND SPROCKET 159
Removal 159
Installation 163
REAR AXLE, SPROCKET AND DRIVE CHAIN 165
Removal 165
Installation 169
DRIVE CHAINS 171
Front Drive Chain Removal and Installation 171
Rear Drive Chains 172
REDUCTION GEARCASE 173
Removal and Installation 173
Disassembly and Assembly 174
CHAINCASE FLUID 178
Removal 178
CHAINCASE COVERS 179
Center Chaincase Cover Removal and Installation 179
Front Chaincase Cover Removal and Installation 181
Rear Chaincase Cover Removal and Installation 182
MAIN FRAME 183
OPERATOR CAB 185
Removal and Installation 185
OPERATOR CAB GAS CYLINDER 187
Removal and Installation 187
SEAT BAR 188
Removal and Installation 188
Assembly 190
Compressing the Gas Cylinder 191
REAR GRILL GAS CYLINDER 192
Removal and Installation 192
REAR DOOR 193
Removal and Installation 193
LIFT ARMS 194
Removal and Installation 194
Installation 195
BOB–TACH 196
Removal and Installation 196
Installation 197
Bob–Tach Wedges 197
Bob–Tach Lever 198
FUEL TANKS 199
Removal and Installation, Left Side 199
Removal and Installation, Right Side 201
Fuel Tank Pick–Up Hose 202
MAIN FRAME 204
Main Frame Bolts 204
ELECTRICAL SYSTEM 205
ELECTRICAL SCHEMATICS 207
TROUBLESHOOTING 215
ELECTRICAL SYSTEM INFORMATION 216
Description 216
BATTERY 217
Checking the Battery 217
Removal and Installation 217
ALTERNATOR 218
Alternator Output Test 218
Rectifier (Diode) Test 218
Alternator Regulator Test 219
Removal and Installation 220
Adjusting the Alternator Belt 220
Disassembly 221
Stator Continuity Test 221
Stator Ground Test 221
Rotor Continuity Test 222
Rotor Ground Test 222
Rectifier Continuity (Diode) Test 222
Assembly 223
STARTER (S/N 11375 & Below) 224
Removal and Installation 224
Checking the Starter 224
Disassembly and Assembly 225
Cleaning and Inspection 227
Parts Identification 228
STARTER (S/N 11376 & Above) 229
Removal and Installation 229
Parts Identification 230
Disassembly and Assembly 231
External Pinion 235
Inspection and Repair 236
Magnetic Switch Test 239
No Load Test 239
STANDARD INSTRUMENT PANEL 240
Removal and Installation 240
FRONT LIGHTS 241
Removal and Installation 241
RELAY SWITCHES 242
Location 242
ENGINE SERVICE 243
TROUBLESHOOTING 245
VALVE CLEARANCE 246
Adjustment 246
ENGINE COMPRESSION 247
Checking 247
FUEL FILTER 248
Removal and Installation 248
FUEL LIFT PUMP 249
Checking 249
Removal and Installation 249
REMOVING AIR FROM FUEL SYSTEM 250
Procedure 250
FUEL INJECTION PUMP 251
Removal and Installation 251
ENGINE TIMING TO INJECTION PUMP 254
Procedure 254
CHECKING TIMING MARK ON INJECTION PUMP FLANGE 255
Procedure 255
FUEL INJECTOR NOZZLES 256
Removal and Installation 256
ENGINE 258
Removal and Installation 258
RADIATOR AND OIL COOLER 264
Removal and Installation 264
ENGINE MUFFLER 267
Removal and Installation 267
EXHAUST GAS PURIFIER (Optional) 267
Function 267
Cleaning the Exhaust Gas Purifier 267
ENGINE MOUNTS 268
Removal and Installation 268
ENGINE FLYWHEEL 268
Flywheel Ring Gear 268
CYLINDER HEAD 269
Removing The Cylinder Head 269
Cylinder Head Surface Alignment 269
Installing The Cylinder Head 269
VALVES 271
Removal Of The Valves 271
Reconditioning The Valves And Valve Seats 271
Installing Valve Guides 272
Installing The Valve Seats 273
Checking The Valve Springs 273
ROCKER ARMS 274
Disassembly 274
Assembly 274
PISTON AND CONNECTING RODS 275
Removal 275
Disassembly 276
Inspection 276
Installation 277
CYLINDER LINERS 279
Removal 279
Installation 279
MAIN BEARING 280
Removal 280
Installation 281
Crankshaft End Play 281
CRANKSHAFT 282
Removal 282
Checking 282
Installation 283
REAR MAIN OIL SEAL 284
Removal and Installation 284
TIMING CASE COVER 285
Removal and Installation 285
IDLER GEAR AND HUB 286
Removal and Installation 286
CAMSHAFT GEAR 287
Removal and Installation 287
FUEL INJECTION PUMP GEAR 288
Removal and Installation 288
Installation 288
CRANKSHAFT GEAR 288
Removal 288
TIMING CASE 289
Removal and Installation 289
Installation 289
CAMSHAFT 290
Removal and Installation 290
Inspection 291
Installation 291
WATER PUMP 292
Disassembly of Water Pump 292
Inspection of the Water Pump 292
Assembly of the Water Pump 293
LUBRICATION SYSTEM 294
Description 294
BALANCER UNIT 295
Removal and Installation 295
Engine Timing to Balancer Unit 295
Oil Pump Removal and Installation 296
Oil Pump Inspection 297
Oil Pump Relief Valve 297
Disassembly and Assembly 297
Inspection 299
BICS™ SYSTEMS 301
BOBCAT INTERLOCK CONTROL SYSTEM (BICS™) 303
Inspecting the BICS™ System Controller (Engine STOPPED – Key ON) 303
Inspecting the Seat and Seat Bar Sensors (Engine RUNNING) 303
Inspecting the Traction Lock (Engine RUNNING) 303
Inspecting the Lift Arm By–Pass Control 303
Maintenance 303
Troubleshooting Chart 304
Troubleshooting Guide 305
BICS SYSTEM CONTROLLER 305
TRACTION LOCK 306
SEAT SENSOR 307
SEAT BAR SENSOR 308
LIFT LOCK BY–PASS VALVE 309
BICS™ SYSTEM CONTROLLER 310
Removal and Installation 310
Controller Test 311
SEAT BAR SENSOR 312
Removal and Installation 312
Seat Bar Sensor Test 313
SEAT SENSOR 314
Removal and Installation 314
Seat Sensor Test 315
TRACTION LOCK 316
Removal and Installation 316
LIFT LOCK BY–PASS VALVE 317
Removal and Installation 317
Disassembly and Assembly 318
TILT LOCK VALVE 319
Removal and Installation 319
Disassembly and Assembly 321
SPECIFICATIONS 323
SKID STEER LOADER SPECIFICATIONS 325
PERFORMANCE 325
CONTROLS 325
ENGINE 325
HYDRAULIC SYSTEM 326
ELECTRICAL 326
DRIVE SYSTEM 326
CAPACITIES 326
TIRES 326
FLOOR PRESSURE 326
VIBRATION DATA 327
ENGINE SPECIFICATIONS 328
Cylinder Head 328
Valve Guides 328
Exhaust Valves 328
Intake Valves 328
Valve Springs 328
Rocker Arms & Tappets 328
Piston & Piston Rings 329
Connecting Rod, Piston Pin & Bushing 329
Cylinder Block & Liners 329
Crankshaft, Main, Connecting Rod Bearings & Thrust Washer 330
Camshaft & Thrust Washer 330
Timing Case & Timing Gears 331
Oil Pump, Gear & Relief Valve 331
Cooling System & Water Pump 332
Fuel Lift Pump, Injection Pump & Injectors 332
De–Rating for Altitude 332
Balance Unit (Center Mounted) 333
Crankshaft Re–Grind Data 334
Engine Torque 335
Service Wear Limits 335
HYDRAULIC/HYDROSTATIC FLUID SPECIFICATIONS 336
DECIMAL AND MILLIMETER EQUIVALENTS 337
U S TO METRIC CONVERSION 337
STANDARD TORQUE SPECIFICATIONS FOR BOLTS 338
SERVICE MANUAL REVISIONS 339
950–1 339
950–2 341
950-3 343

DESCRIPTION:

Bobcat 953 Loader Service Manual 6724352 (02-20) – PDF DOWNLOAD

FOREWORD:

This manual is for the Bobcat loader mechanic. It provides necessary servicing and adjustment procedures for the Bobcat loader and its component parts and systems. Refer to the Operation & Maintenance Manual for operating instructions, starting procedure, daily checks, etc.

SAFETY INSTRUCTIONS:

The following publications provide information on the safe use and maintenance of the loader and attachments:
• The Delivery Report is used to assure that complete instructions have been given to the new owner and that the machine
is in safe operating condition.
• The Operation & Maintenance Manual delivered with the loader gives operating information as well as routin e
maintenance and service procedures. It is a part of the loader and must stay with the machine when it is sold. Replacement
Operation & Maintenance Manuals can be ordered from your Bobcat loader dealer.
• The loader has machine signs (decals) which instruct on the safe operation and care. The signs and their locations are
shown in the Operation & Maintenance Manual. Replacement signs are available from your Bobcat loader dealer.
• The loader has a plastic Operator’s Handbook fastened to the operator cab. Its brief instructions are convenient to the
operator. The handbook is available from your dealer in English edition or French, German, Italian, Dutch & Spanish
editions.
• The EMI Safety Manual (available in Spanish) delivered with the loader gives general safety information.
• The Service Manual and Parts Manual are available from your dealer for use by mechanics to do shop–type service and
repair work.
• The Skid–Steer Loader Operator Training Course is available through your dealer. This course provides information for
safe and efficient operation of the Bobcat loader. The course is available in English and Spanish versions.
• Wear tight fitting clothing. Always wear safety glasses when maintaining or servicing loader. Safety glasses, hearing
protection or loader special applications kit are required for some work. See your dealer for Melroe Safety equipment.
• Know where fire extinguishers and first aid kits are located and how to use them.
• Do not use the Bobcat loader where exhaust, arcs, sparks or hot components can contact flammable material, explosive
dust or gases.
• The engine compartment and engine cooling system must be inspected every day and cleaned if necessary to prevent
fire hazard and overheating.
• Check all electrical wiring and connections for damage. Keep the battery terminals clean and tight. Repair or replace any
damaged part.
• Check fuel and hydraulic tubes, hoses and fittings for damage and leakage. Never use open flame or bare skin to check
for leaks. Tighten or replace any parts that show leakage. Always clean fluid spills. Do not use gasoline or diesel fuel for
cleaning parts. Use commercial nonflammable solvents.
• Follow any environmental safety regulations when disposing of used fluids such as engine oil, grease or anti–freeze.
• Do not use ether or starting fluids on this engine. It has glow plugs. These starting aids can cause explosion and injure
you or bystanders.
• Always clean the loader and disconnect the battery before doing any welding. Cover rubber hoses, battery and all other
flammable parts. Keep a fire extinguisher near the loader when welding. Have good ventilation when grinding or welding
painted parts. Wear dust mask when grinding painted parts. Toxic dust or gas can be produced.
• Stop the engine and let it cool before adding fuel. No smoking!
• Use the procedure in the Operation & Maintenance or Service Manuals for connecting the battery.
• Use the procedure in the Operation & Maintenance or Service Manuals for cleaning the spark arrestor muffler.
A fire extinguisher is available from your local dealer. The fire extinguisher can be installed in the location shown [A].

Questions? Email us: [email protected]

IMAGES PREVIEW OF THE MANUAL:

PLEASE NOTE:

• This is the SAME exact manual used by your dealers to fix your vehicle.
• The same can be yours in the next 2-3 mins as you will be directed to the download page immediately after paying for the manual.
• Any queries / doubts regarding your purchase, please feel free to contact [email protected]

S.V