Komatsu Motor Graders GD750A Repair Service Manual + Operation Maintenance Manual
Complete service repair manual with Electrical Wiring Diagrams for Komatsu Motor Graders GD750A, with all the technical information to maintain, diagnose, repair, rebuild like professional mechanics.
Komatsu Motor Graders GD750A workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
PRODUCT DETAILS:
Total Pages: 1,401 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English
CEAM002402 - Komatsu Motor Grader GD750A-1 Operation & Maintenance Manual.pdf
CEBM002104 - Komatsu Motor Grader GD750A-1 Shop Manual.pdf
MAIN SECTIONS
TABLE OF CONTENTS
01 GENERAL... . . 01-1
10 STRUCTURE AND FUNCTION.. . . .10-1
20 TESTING AND ADJUSTMENT. . . . . 20-1
30 DISASSEMBLY AND ASSEMBLY. . . . . 30-1
40 MAINTENANCE STANDARD.. . . 40-1
MAIN MENU.0
COVER PAGE.1
1. FORWARD.5
2. SAFETY INFORMATION.6
3. INTRODUCTION.7
3.1 INTENDED USE.7
3.2 FEATURES.7
3.3 BREAKING IN THE MACHINE.7
4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR.8
4.1 P.I.N. NUMBER LOCATIONS.8
4.2 ENGINE SERIAL NO. PLATE POSITION.9
4.3 TRANSMISSION SERIAL NO. PLATE POSITION.9
4.4 REAR AXLE SERIAL NO. PLATE POSITION.9
4.5 CAB ROPS/FOBS SERIAL NO. PLATE POSITION.10
4.6 GENERAL PART NO. PLATE.10
4.7 TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR.11
5. TABLE OF CONTENTS.12
SAFETY.20
6. GENERAL PRECAUTIONS.21
7. PRECAUTIONS DURING OPERATION.27
7.1 BEFORE STARTING ENGINE.27
7.2 OPERATING MACHINE.29
7.3 TRANSPORTATION.35
7.4 BATTERY.36
7.5 TOWING.39
7.6 TIRES.40
8. PRECAUTIONS FOR MAINTENANCE.42
8.1 BEFORE CARRYING OUT MAINTENANCE.42
8.2 DURING MAINTENANCE.46
9. POSITON FOR ATTACHING SAFETY LABELS.52
9.1 POSITION FOR ATTACHING SAFETY LABELS.52
OPERATION.62
10. GENERAL VIEW.63
10.1 GENERAL VIEW OF MACHINE.63
10.2 UNIVERSAL SYMBOLS FOR INSTRUMENTS AND CONTROLS.64
11. EXPLANATION OF COMPONENTS.65
11.1 STEERING CONSOLE CONTROLS AND GAUGES.65
11.2 RIGHT SIDE CONSOLE.73
11.3 MISCELLANEOUS CONTROLS.75
11.4 HEATER/AIR CONDITIONING CONTROLS.78
11.4.1 METHOD OF OPERATION.81
11.4.2 PRECAUTIONS WHEN USING AIR CONDITIONER.82
11.4.3 HANDLING DURING SEASON.82
11.4.4 HANDLING DURING OFF-SEASON.82
11.5 MISCELLANEOUS GAUGES AND VALVE.83
11.6 ACCESS COVERS, HOOD SIDES AND DOORS.84
11.7 CONTROL LEVERS AND PEDALS.87
11.8 CAP WITH LOCK.96
11.8.1 METHOD OF OPENING CAP WITH LOCK.96
11.8.2 METHOD OF CLOSING CAP WITH LOCK.96
11.9 ARTICULATE LOCK PIN.96
11.10 PARKING BRAKE.97
11.11 BACKUP ALARM.97
11.12 CIRCUIT BREAKERS.97
12. MACHINE OPERATION.99
12.1 WALK AROUND CHECK.99
12.2 TOWING.102
12.3 CHECKS BEFORE STARTING.103
12.3.1 CHECK COOLANT LEVEL, ADD COOLANT.104
12.3.2 CHECK MONITOR PANEL.104
12.3.3 CHECK FUEL LEVEL, ADD FUEL.105
12.3.4 CHECK OIL LEVEL IN ENGINE OIL PAN, ADD OIL.105
12.3.5 CHECK ELECTRIC WIRING.106
12.3.6 DRAIN WATER AND SEDIMENT IN FUEL TANK.106
12.3.7 CHECK VOLTMETER.107
12.3.8 CHECK FOR SEDIMENT AND WATER IN THE WATER SEPARATOR.107
12.3.9 CHECK LAMPS FOR SWITCHING, DIRT AND DAMAGE.107
12.3.10 CHECK REAR VIEW MIRROR FOR POSITIONING, DIRT AND DAMAGE.107
12.3.11 CHECK HORN AND BACKUP ALARM.107
12.3.12 DO THE INTRUMENTS FUNCTION NORMALLY.107
12.3.13 CHECK THE SEAT BELT FOR NORMAL FUNCTION.107
12.3.14 CHECK THE DOOR LOCKS FOR NORMAL FUNCTION.107
12.3.15 CHECK THE WINDSHIELD WIPER, WINDOW WASHER AND DEFROSTER FOR NORMAL FUNCTION. CHECK FOR SUFFICIENT WASHER FLUID LEVE.108
12.3.16 CHECK FOR MISSING GUARDS, OR PROTECTIVE EQUIPMENT. DO NOT OPERATE UNIT IF ANY ARE MISSING.108
12.3.17 GENERAL SAFETY.108
12.4 REMOVAL OF ARTICULATION PIN.108
12.5 ENTERING OPERATOR'S CAB.108
12.6 ADJUSTMENTS BEFORE OPERATION.109
12.6.1 ADJUST OPERATOR'S SEAT.109
12.6.2 SEAT BELT.110
12.6.3 ADJUSTING POSITION OF STEERING WHEEL AND GAUGE PANEL.111
12.6.4 ADJUSTING MIRRORS.111
12.7 OPERATIONS AND CHECKS BEFORE STARTING ENGINE.112
12.8 STARTING ENGINE.114
12.8.1 NORMAL STARTING.114
12.8.2 STARTING IN COLD WEATHER: USING ETHER INJECTOR (OPTIONAL).115
12.8.3 STARTING PROCEDURES AFTER EXTENDED SHUTDOWN OR OIL CHANGE.117
12.8.4 STARTING PROCEDURES AFTER CHANGING FUEL FILTERS.117
12.8.5 STARTING PROCEDURES AFTER RUNNING OUT OF FUEL.118
12.9 OPERATIONS AND CHECKS AFTER STARTING ENGINE.119
12.9.1 ENGINE WARM UP.119
12.9.2 WHILE WARMING UP - ENGINE RUNNING ABOVE IDLE.119
12.9.3 COLD WEATHER START UP.120
12.9.4 HYDRAULIC SYSTEM COLD WEATHER START UP.120
12.10 TRAVELING POSTURE FOR MACHINE.121
12.11 MOVING MACHINE.122
12.12 SHIFTING GEARS.123
12.12.1 ACCELERATION.123
12.12.2 DECELERATION.123
12.13 SHIFTING BETWEEN FORWARD AND REVERSE.124
12.14 STOPPING MACHINE.125
12.15 TURNING MACHINE.126
12.15.1 LEANING OPERATION.126
12.15.2 ARTICULATING OPERATION.127
12.16 OPERATING WORK EQUIPMENT.128
12.16.1 OPERATING BLADE.128
12.16.2 OPERATING DRAWBAR SIDE SHIFT.131
12.16.3 OPERATING RIPPER.132
12.16.4 PROPULSION ANGLE OF BLADE.132
12.16.5 RH & LH 90 DEGREE BLADE SUSPENSION.133
12.17 WORK APPLICATION.135
12.17.1 LEVELING GROUND TO RIGHT.135
12.17.2 LEVELING GROUND TO LEFT.136
12.17.3 DIGGING RIGHT V-DITCHES.137
12.17.4 DIGGING LEFT V-DITCHES.139
12.18 RIGHT DITCH FINISHING.141
12.19 LEFT DITCH FINISHING.142
12.20 FINISHING RIGHT ROAD SHOULDER.143
12.21 FINISHING LEFT ROAD SHOULDER.143
12.22 CONSTRUCTING ROAD - METHOD OF MAKING V-DITCH.144
12.23 FLAT-BOTTOM DITCH.148
12.24 CONSTRUCTING ROAD - METHOD FOR MAKING FLAT BOTTOM DITCH.150
12.25 FINISHING WITH GRADER FOR DITCHES WHERE WET ROAD SHOULDER IS LOOSE.153
12.26 LEVELING 3:1 SLOPE FACE.153
12.27 BANK CUTTING METHOD - RIGHT SIDE.153
12.28 EXTREME SIDE REACH.157
12.29 RIPPER OPERATIONS - WITH FRAME STRAIGHT.158
12.30 PRECAUTIONS FOR OPERATION.159
12.30.1 PRECAUTIONS WHEN TRAVELING UP OR DOWN HILLS.159
12.30.2 PRECAUTIONS WHEN USING ARTICULATED STEERING.159
12.30.3 PRECAUTIONS WHEN TRAVELING ON ROADS.160
12.30.4 CAUTIONS IN OPERATION OF WORK EQUIPMENT.160
12.31 ADJUSTING WORK EQUIPMENT POSTURE.160
12.31.1 BLADE PROTRUSION.160
12.32 PARKING MACHINE.161
12.33 CHECK AFTER FINISHING WORK.162
12.34 STOPPING ENGINE.162
12.35 CHECK AFTER STOPPING ENGINE.163
12.36 LOCKING.163
12.37 TIRES.164
12.37.1 PRECAUTIONS WHEN HANDLING TIRES.164
12.37.2 DIRECTION OF TIRE TREADS.164
12.37.3 TIRE MATCHING.164
12.38 BLADE ACCUMULATOR.165
12.38.1 OPERATION.165
12.38.2 FEATURES.166
12.39 HANDLING BLADE FLOAT.166
12.39.1 OPERATION.166
12.39.2 FEATURES.167
13. TRANSPORTATION.168
13.1 GENERAL.170
13.1.1 TRUCK.170
13.1.2 RAILROAD FLATCAR.170
13.1.3 DRIVING.170
13.2 MOVING A DISABLED MACHINE.171
13.3 METHODS OF TOWING.171
13.3.1 METHOD ONE.172
13.3.2 METHOD TWO.173
13.3.3 METHOD THREE.173
14. OPERATION UNDER UNUSUAL CONDITIONS.175
14.1 OPERATION IN EXTREME COLD.175
14.1.1 COLD WEATHER STARTING AID (OPTIONAL).176
14.1.2 ENGINE BLOCK HEATER (OPTIONAL).177
14.2 BATTERY.177
14.2.1 CHARGING.178
14.2.2 AFTER CHARGING.179
14.3 AFTER COLD WEATHER.179
14.4 OPERATION IN EXTREME HEAT.179
14.5 OPERATION IN DUSTY OR SANDY AREAS.180
14.6 OPERATION IN RAINY OR HUMID CONDITIONS.181
14.7 OPERATION IN SALT WATER AREAS.181
14.8 OPERATION AT HIGH ALTITUDES.182
15. MACHINE STORAGE.183
15.1 PREPARING FOR STORAGE.183
15.2 SERVICING MACHINE DURING STORAGE.186
15.2.1 ONE-MONTH REPETITIVE SERVICE PERIOD.186
15.2.2 SIX MONTH REPETITIVE SERVICE PERIOD.186
15.3 PREPARING FOR OPERATION.187
15.4 ROLLOVER PROTECTIVE STRUCTURE.188
15.5 THEFT DETERRENT PRACTICES.189
15.5.1 ACTION TO DISCOURAGE THEFT AND VANDALISM.189
15.5.2 ACTIONS TO AID IN RECOVERY OF STOLEN MACHINES.189
16. TROUBLESHOOTING.191
16.1 ETHER STARTING.191
16.1.1 FLUID CYLINDER.191
16.1.2 ATOMIZERS.191
16.1.3 TUBING.191
16.1.4 ELECTRIC VALVE.192
16.1.5 REASSEMBLY.192
16.2 AFTER RUNNING OUT OF FUEL.192
16.3 WHEN LEANING PIPING IS DAMAGED.193
16.3.1 HOW TO USE LEANING STOPPER.193
16.4 IF BATTERY IS DISCHARGED.194
16.4.1 STARTING ENGINE WITH BOOSTER CABLE.195
16.5 OTHER TROUBLE.197
16.5.1 ELECTRICAL SYSTEM.197
16.5.2 CHASSIS.198
16.5.3 ENGINE.201
16.5.4 INSTRUMENT PANEL.203
16.5.5 FAULT CODES EXPLANATION.206
16.5.6 SHIFT LEVER ERROR CODES.219
MAINTENANCE.220
17. GUIDES TO MAINTENANCE.221
18. OUTLINES OF SERVICE.224
18.1 OUTLINE OF OIL, FUEL, COOLANT.224
18.1.1 OIL.224
18.1.2 FUEL.225
18.1.3 COOLANT.225
18.1.4 GREASE.226
18.1.5 STORING OIL AND FUEL.226
18.1.6 FILTERS.226
18.2 RELATING TO ELECTRIC SYSTEM.227
18.2.1 BATTERIES.228
18.2.2 BATTERY - GENERAL MAINTENANCE.229
18.2.3 CLEANING THE BATTERIES.230
18.2.4 CONVENTIONAL ANTIMONY (LEAD-ACID) BATTERY.230
18.2.5 LOW MAINTENANCE BATTERY.230
18.2.6 MAINTENANCE FREE BATTERY.230
18.2.7 BATTERY CHARGING.230
19. WEAR PARTS LIST.237
20. FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE.239
20.1 PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS.239
20.2 ENGINE OIL SPECIFICATIONS.241
20.2.1 NORMAL OPERATION.241
20.2.2 ARCTIC OPERATION.242
20.3 TRANSMISSION, TORQUE CONVERTER AND OIL COOLER, TANDEM DRIVE CASES.242
20.4 HYDRAULIC SYSTEM OIL SPECIFICATIONS.242
20.5 REAR DRIVE AXLE AND CIRCLE DRIVE BRAKE HOUSING OIL SPECIFICATIONS.242
20.6 DIESEL FUEL SPECIFICATIONS.242
20.7 COOLANT SPECIFICATIONS.243
20.7.1 GENERAL.243
20.7.2 ANTIFREEZE.244
20.7.3 SUPPLEMENTAL COOLANT ADDITIVES.245
20.8 CIRCLE DRIVE GEAR CASE OIL SPECIFICATIONS (HDTF).250
21 STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS.251
21.1 INTRODUCTION OF NECESSARY TOOLS.251
21.2 TORQUE VALUES FOR STANDARD METRIC FASTENERS.252
21.3 TORQUE VALUES FOR STANDARD ENGLISH FASTENERS.253
21.3.1 TYPE 1, 5 AND 8 NON-PHOSPHATE COATED HARDWARE.253
21.3.2 TYPE 8 PHOSPHATE COATED HARDWARE.254
21.3.3 TORQUE VALUES FOR HOSE CLAMPS.255
21.3.4 TORQUE VALUES FOR SPLIT FLANGE CONNECTIONS.255
21.3.5 O-RING FACE SEAL FITTING TORQUE.256
22. PERIODIC REPLACEMENT OF CRITICAL PARTS.257
23. MAINTENANCE SCHEDULE CHART.258
23.1 MAINTENANCE SCHEDULE CHART.258
24. SERVICE PROCEDURES.263
24.1 PERIODIC SERVICE CHART.264
24.2 WHEN REQUIRED.265
24.2.1 ETHER STARTING AID.265
24.2.2 CIRCUIT BREAKERS.265
24.2.3 REVERSE AND REPLACE THE END BITS AND CUTTING EDGES.265
24.2.4 REPLACING RIPPER TOOTH.266
24.2.5 MOLDBOARD SLIDE.267
24.2.6 CHECK CIRCLE GUIDE CLEARANCE, ADJUST.267
24.2.7 MOLDBOARD ACCUMULATOR (IF EQUIPPED).271
24.2.8 WIPER BLADES.271
24.2.9 CIRCLE SLIP CLUTCH, LEVEL AND FILL PLUGS.271
24.2.10 CIRCLE REVERSE GEAR CASE - WET TYPE BRAKE ADJUSTING.272
24.2.11 INCHING PEDAL - INSPECTING.272
24.2.12 TRANSMISSION CLUTCH - CALIBRATION.273
24.2.13 TORQUE CONVERTER LOCK UP - CHECK.273
24.3 CHECK BEFORE STARTING ENGINE.274
24.4 EVERY SHIFT/10 HOURS SERVICE.275
24.4.1 BRAKES - CHECK.275
24.4.2 WARNING LIGHT - CHECK.275
24.4.3 GAUGES - CHECK.275
24.4.4 BACKUP ALARM - CHECK.275
24.4.5 OPERATIONAL LIGHTS - CHECK.275
24.4.6 RADIATOR COOLANT LEVEL - CHECK.276
24.4.7 RADIATOR DEBRIS - CHECK.277
24.4.8 FUEL/WATER SEPARATOR - DRAIN.277
24.4.9 FUEL TANK FUEL/WATER TRAP - DRAIN.277
24.4.10 FUEL TANK - CHECK.278
24.4.11 ENGINE AIR CLEANER - CHECK.278
24.4.12 TRANSMISSION OIL LEVEL TRANSMISSION DIPSTICK.281
24.4.13 HYDRAULIC OIL TANK LEVEL HYDRAULIC OIL TANK SIGHT GAGE.282
24.4.14 BLADE SLIDE RAILS.282
24.4.15 ENGINE OIL DIPSTICK & FILL CAP.283
24.4.16 CIRCLE TEETH.283
24.4.17 CIRCLE TOP & BOTTOM.283
24.4.18 ENGINE FAN BLADE.284
24.5 EVERY 50 MAN HOURS/WEEKLY SERVICE.285
24.5.1 AXLE AND FRONT STEERING LINKAGE.285
24.5.2 STEERING LINKAGE & CYLINDER PINS.285
24.5.3 THE ROD & LEANING WHEEL ROD CYLINDER.286
24.5.4 DRAWBAR BALL JOINT.286
24.5.5 ARTICULATION BEARINGS.287
24.5.6 RIPPER LINKAGE.287
24.5.7 CIRCLE REVERSE CASE OIL LEVEL.288
24.5.8 CAB AIR FILTERS (IF EQUIPPED).288
24.5.9 TIRES.288
24.5.10 TANDEM CASES, BREATHER.289
24.5.11 TANDEM CASES, FILL PLUG.289
24.5.12 TANDEM CASES, OIL LEVEL PLUG.289
24.5.13 HYDRAULIC OIL FILTER.289
24.5.14 TRANSMISSION FILTER.290
24.5.15 BATTERY.291
24.5.16 MACHINE.291
24.6 100 HOURS INITIAL SERVICE.292
24.6.1 LOCK/UNLOCK AXLE FILTER.292
24.6.2 REAR AXLE, SUCTION SCREEN.292
24.6.3 REAR AXLE DIFFERENTIAL.292
24.7 EVERY 250 HOURS/MONTHLY SERVICE.293
24.7.1 AIR INTAKE HOSES & CLAMPS.293
24.7.2 COOLANT SYSTEM HOSES & CLAMPS.293
24.7.3 REAR AXLE, OIL LEVEL.293
24.7.4 ENGINE OIL & FILTER CHANGE.294
24.7.5 COOLANT CORROSION RESISTER CARTRIDGE.295
24.7.6 CIRCLE REVERSE CASE BREATHER.295
24.7.7 CONTROL LEVER LINKAGES.295
24.7.8 CONTROL VALVE LINKAGES.296
24.7.9 BRAKE ACCUMULATOR GAS PRESSURE.296
24.7.10 BANK CONTROL GUIDE.296
24.7.11 RIPPER CYLINDERS (IF EQUIPPED).296
24.7.12 LIFT CYLINDER CAP.297
24.7.13 LIFT CYLINDER TRUNNIONS.297
24.7.14 LIFT CYLINDER TRUNNION SHAFTS.297
24.7.15 CIRCLE SIDE SHIFT CYLINDER.297
24.7.16 BLADE PITCH CYLINDER.298
24.7.17 ARTICULATION CYLINDERS.298
24.7.18 WHEEL HUB BOLTS.298
24.7.19 WHEEL BRAKE.299
24.7.20 AIR CONDITIONER BELT.300
24.8 EVERY 500 HOUR/THREE MONTHS SERVICE.301
24.8.1 COOLANT PROTECTION.301
24.8.2 FUEL FILTER.301
24.8.3 PARKING BRAKE.303
24.8.4 FUEL TANK, FILTER SCREEN (STRAINER).303
24.8.5 TRANSMISSION FILTER.303
24.8.6 WHEEL BRAKE.303
24.8.7 BLADE ACCUMULATORS.303
24.9 EVERY 1000 HOURS/SIX MONTHS SERVICE.304
24.9.1 DRAWBAR, FRONT BALL JOINT.304
24.9.2 ROPS MOUNT BOLTS.304
24.9.3 HYDRAULIC OIL FILTER.304
24.9.4 TRANSMISSION OIL.304
24.9.5 DRIVE SHAFT.305
24.9.6 LOCK/UNLOCK AXLE FILTER.305
24.9.7 FRONT WHEEL BEARING.306
24.9.8 TOE-IN.306
24.9.9 ENGINE DRIVE & ALTERNATOR BELTS.308
24.9.10 FAN BELT.309
24.9.11 ALTERNATOR BELT.310
24.9.12 AIR CONDITIONER BELT.310
24.10 EVERY 1500 HOURS SERVICE.311
24.10.1 ENGINE VALVES AND INJECTORS.311
24.10.2 TURBOCHARGER MOUNTING NUTS.311
24.10.3 ENGINE MOUNT BOLTS.311
24.10.4 WATER PUMP.311
24.10.5 ENGINE.311
24.11 EVERY 2000 HOUR/ONE YEAR SERVICE.312
24.11.1 TANDEM DRIVE CASE.312
24.11.2 HYDRAULIC TANK RETURN FILTER AND SUCTION STRAINER.313
24.11.3 HYDRAULIC TANK.314
24.11.4 HYDRAULIC TANK FILTER BREATHER CAP.317
24.11.5 REAR AXLE.317
24.11.6 CIRCLE DRIVE.317
24.11.7 FRONT WHEEL BEARING.317
24.11.8 LOCK/UNLOCK OF SUCTION SCREEN.318
24.11.19 VALVES & INJECTORS.318
24.11.10 CAB PRESSURIZER FILTER.319
24.11.11 ACCUMULATORS.319
24.11.12 BATTERIES.319
24.12 EVERY 4000 HOURS/TWO YEAR SERVICE.320
24.12.1 RADIATOR COOLANT.320
24.12.2 REFRIGERANT (GAS) IN AIR CONDITIONER CHECKING LEVEL.324
24.13 EVERY 6000 HOURS/THREE YEAR SERVICE.326
24.13.1 INJECTORS.326
24.13.2 FUEL PUMP.326
24.13.3 TURBOCHARGER.326
24.13.4 FAN HUB.326
24.13.5 IDLER PULLEY.326
24.13.6 VIBRATION DAMPER.326
SPECIFICATIONS.328
25. GD750A-1.329
25.1 WEIGHT.330
25.2 TRANSMISSION AND TORQUE CONVERTER PERFORMANCE.330
25.3 LIQUID CAPACITIES.330
25.4 ENGINE.331
25.5 HYDRAULIC.331
25.6 CIRCLE.331
25.7 DRAWBAR.332
25.8 MOLDBOARD.332
25.9 BLADE RANGE.332
25.10 FRONT AXLE.332
25.11 AXLE REAR.333
25.12 STEERING.333
25.13 TANDEM DRIVE.333
25.14 WHEELS, FRONT AND REAR.333
25.15 BRAKES.333
25.16 OPERATOR'S COMPARTMENT.333
