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KOMATSU PC75UU-2 SERVICE REPAIR MANUAL (SN:5001 & UP) KOMATSU PC75UU 2 – PDF DOWNLOAD
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- KOMATSU PC75UU-2 SERVICE REPAIR MANUAL
- SERIAL NUMBER:5001 & UP
- PUBLICATION NUMBER:SEBM001302
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Description
KOMATSU PC75UU-2 SERVICE REPAIR MANUAL (SN:5001 & UP) KOMATSU PC75UU 2
KOMATSU PC75UU-2 SERVICE REPAIR MANUAL (SN:5001 & UP) KOMATSU PC75UU 2 – PDF DOWNLOAD:
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DESCRIPTION:
KOMATSU PC75UU-2 SERVICE REPAIR MANUAL (SN:5001 & UP) KOMATSU PC75UU 2
- This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
- This shop manual mainly contains the necessary technical information for operations performed in a service workshop. For ease of understanding, the manual is divided into the following chapters; these chapters are further divided into the each main group of components.
- Structure and function
This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting. In addition, this section may contain hydraulic circuit diagrams, electric circuit diagrams, and maintenance standards. - Testing and adjusting
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs. Troubleshooting charts correlating “Problems” with “Causes” are also included in this section. - Disassembly and assembly
This section explains the procedures for removing, installing, disassembling and assembling each component, as well as precautions for them. - Maintenance standard
This section gives the judgment standards for inspection of disassembled parts. The contents of this section may be described in “Structure and function”. - Others
This section mainly gives hydraulic circuit diagrams and electric circuit diagrams. In addition, this section may give the specifications of attachments and options together.
TABLE OF CONTENTS:
KOMATSU PC75UU-2 SERVICE REPAIR MANUAL (SN:5001 & UP) KOMATSU PC75UU 2
COVER......................................................................................................................................................... 1 CONTENTS...................................................................................................................................................... 2 01 GENERAL.................................................................................................................................................... 25 GENERAL ASSEMBLY DRAWING.................................................................................................................................. 26 SPECIFICATIONS............................................................................................................................................ 30 WEIGHT TABLE.............................................................................................................................................. 34 LIST OF LUBRICANT AND WATER............................................................................................................................... 36 10 STRUCTURE AND FUNCTION..................................................................................................................................... 38 HYDRAULIC PIPING DIAGRAM.................................................................................................................................. 39 HYDRULIC CIRCUIT DIAGRAM.................................................................................................................................. 40 ELECTRIC WIRING DIAGRAM................................................................................................................................... 41 ELECTRIC CIRCUIT DIAGRAM.................................................................................................................................. 43 20 TESTING AND ADJUSTING...................................................................................................................................... 45 TABLE OF JUDGEMENT STANDARD VALUE......................................................................................................................... 46 STANDARD VALUE TABLE FOR ELECTRICAL PARTS................................................................................................................. 54 TOOLS FOR TESTING ,ADJUSTING,AND TROUBLESHOOTING.......................................................................................................... 59 MEASURING ENGINE SPEED.................................................................................................................................... 60 MEASURING ENGINE OIL PRESSURE............................................................................................................................. 60 MEASURING COMPRESSION PRESSURE............................................................................................................................ 61 MEASURING BLOW-BY......................................................................................................................................... 62 ADJUSTING VALVE CLEARANCE................................................................................................................................. 63 TESTING AND ADJUSTING FUEL INJECTION TIMING............................................................................................................... 64 TESTING AND ADJUSTING ALTERNATOR FAN BELT TENSION......................................................................................................... 65 ADJUSTING FUEL CONTROL LEVER.............................................................................................................................. 66 TESTING AND ADJUSTING TRACK SHOE TENSION.................................................................................................................. 68 TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT......................................................................... 69 TESTING CONTROL CIRCUIT PRESSURE.......................................................................................................................... 72 MEASURING OUTPUT PRESSURE OF PPC VALVE.................................................................................................................... 74 ADJUSTING PPC VALVE ...................................................................................................................................... 75 MEASURING OUTLET PORT PRESSURE OF SOLENOID VALVE,EPC VALVE................................................................................................ 76 MEASURING OIL LEAKAGE INSIDE CYLINDER..................................................................................................................... 77 MEASURING OIL LEAKAGE FROM SWING,TRAVEL MOTOR............................................................................................................. 78 BLEEDING AIR FROM HYDRAULIC CIRCUIT....................................................................................................................... 79 RELEASING REMAINING FROM HYDRAULIC CIRCUIT................................................................................................................ 81 ADJUSTING BLADE CONTROL LEVER............................................................................................................................. 82 ADJUSTING TRAVEL CONTROL LEVER............................................................................................................................ 83 PROCEDURE FOR RESETTING ELECTRICAL SYSTEM INPUT/OUTPUT SIGNALS AND CHECKING OPERATION..................................................................... 84 PROCEDURE FOR REPLACING POTENTIOMETER .................................................................................................................... 95 PROCDURE FOR CHECKING DIODE............................................................................................................................... 96 TROUBLESHOOTING........................................................................................................................................... 97 POINTS TO REMEMBER WHEN TROUBLESHOOTING............................................................................................................... 98 SEQUENCE OF EVENTS IN TROUBLESHOOTING................................................................................................................. 99 PRECAUTIONS WHEN CARRYING OUT MAINTENANCE.............................................................................................................100 CHECKS BEFORE TROUBLESHOOTING.........................................................................................................................107 ELECTRICAL CIRCUIT DIAGRAMS FOR EACH SYSTEM...........................................................................................................108 CONNECTOR ARRANGEMENT DRAWING.........................................................................................................................112 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS............................................................................................................116 HANDING CONNECTORS....................................................................................................................................123 EXPLANATIONS OF CONTROL MECHANISM OF ELECTRICAL SYSTEM................................................................................................124 DISPLAY METHOD FOR MONITOR PANEL,CONTROLLER...........................................................................................................128 ACTION TAKEN BY SELF DIAGNOSTIC FUNCTION AND PROBLEMS ON MACHINE......................................................................................133 METHOD OF USING JUDGEMENT TABLE.......................................................................................................................134 METHOD OF USING TROUBLESHOOTING CHARTS................................................................................................................135 TROUBLESHOOTING OF CONTROLLER,ELECTRICAL SYSTEM (E MODE)..............................................................................................137 JUDGEMENT TABLE FOR CONTROLLER,ELECTRICAL,HYDRAULIC AND MECHANICAL SYSTEMS........................................................................138 POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING OF CONTROLLER SYSTEM.........................................................................139 PRECAUTIONS WHEN HANDLING CANCEL SWITCH WHEN ABNORMALITY DISPLAY IS GIVEN AND WORK EQUIPMENT STOPS ...............................................142 E-1 ERROR CODE [EE] (ABNORMALITY IN CONTROLLER POWER SOURCE SYSTEM OR COMMUNICATIONS SYSTEM) .....................................................143 a) ABNORMALITY IN CONTROLLER POWER SOURCE SYSTEM..............................................................................................143 b) ABNORMALITY IN COMMUNICATIONS SYSTEM.......................................................................................................144 E-2 ERROR CODE [21] (ABNORMALITY IN MODEL SELECTION SYSTEM).......................................................................................145 E-3 ERROR CODE [22] (ABNORMALITY IN WORK EQUIPMENT SELECTION SYSTEM)..............................................................................146 E-4 ERROR CODE [31] (ABNORMALITY IN BOOM POTENTIOMETER SYSTEM)....................................................................................147 E-5 ERROR CODE [32] (ABNORMALITY IN ARM POTENTIOMETER SYSTEM).....................................................................................148 E-6 ERROR CODE [34] (ABNORMALITY IN OFFSET POTENTIOMETER SYSTEM)..................................................................................149 E-7 ERROR CODE [41] (ABNORMALITY IN PPC LOCK SOLENOID SYSTEM).....................................................................................150 E-8 ERROR CODE [42] (ABNORMALITY IN LEFT OFFSET STOP SOLENOID SYSTEM).............................................................................151 E-9 ERROR CODE [44] (ABNORMALITY IN BOOM LOWER STOP SOLENIOD SYSTEM)..............................................................................152 E-10 ERROR CODE [51] (ABNORMALITY IN BOOM RAISE STOP SOLENOID SYSTEM).............................................................................153 E-11 ERROR CODE [52] (ABNORMALITY IN ARM IN STOP SOLENOID SYSTEM).................................................................................154 E-12 WORK EQUIPMENT DOES NOT WORK EVEN WHEN EQUIPMENT LOCK LEVER IS RELEASED......................................................................155 E-13 DEPTH MODE,HEIGHT MODE,OFFSET MODE DO NOT WORK PROPERLY (GO BEYOND SET POSITION BEFORE STOPPING OR STOP BEFORE REACHING SET POSITION)........156 E-14 IMPOSSIBLE TO SELECT AND SET DEPTH DISPLAY 0 SET MODE,DEPTH MODE,HEIGHT MODE,OFFSET MODE.....................................................157 E-15 CANCLE SWITCH IS NOT TURNED ON,BUT ALARM BUZZER SOUNDS FOR 7 SECONDS AND ELECTRIC SYSTEM CAUTION LAMP FLASHES................................158 E-16 AUTOMATIC STOP IS NOT CARRIED OUT FOR BOOM RAISE,ARM IN,LEFT OFFSET (WHEN ERROR CODE [61] IS NOT DISPLAYED)..................................159 E-17 WORK EQUIPMENT LOCK LEVER IS AT LOCK POSITION BUT WORK EQUIPMENT MOVES.......................................................................160 E-18 ENGINE DOES NOT START WHEN STARTING SWITCH IS TURNED TO START................................................................................161 E-19 EVEN WHEN STARTING SWITCH IS TURNED OFF,ENGINE DOES NOT STOP.................................................................................163 E-20 UPPER STRUCTURE DOES NOT SWING (WHEN SWING LEVER IS OPERATED,AND NO ELECTRICITY FLOWS TO SWING BRAKE SOLENOID)...............................164 E-21 EXCESSIVE HYDRAULIC DRIFT OF SWING (WHEN ELECTRIC CURRENT FLOWS TO SWING BRAKE SOLENIOD BOTH WHEN SWING LEVER IS OPERATED AND AT NEUTRAL)....166 TROUBLESHOOTING OF HYDRAULIC,MECHANICAL SYSTEM (H MODE)...............................................................................................168 H-1 SPEEDS OF ALL WORK EQUIPMENT,SWING,TRAVEL ARE SLOW............................................................................................169 a) SPEEDS OF ALL WORK EQUIPMENT AND SWING ARE SLOW (WHEN BLADE AND TRAVEL SPEEDS ARE NORMAL)..................................................169 b) SPEEDS OF ALL WORK EQUIPMENT,SWING,TRAVEL ARE ALL SLOW.....................................................................................171 H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED,OR ENGINE STALLS......................................................................................172 H-3 NO WORK EQUIPMENT,SWING,TRAVEL MOVE...........................................................................................................173 a) NONE OF WORK EQUIPMENT AND SWING MOVE......................................................................................................173 b) NONE OF WORK EQUIPMENT, SWING, TRAVEL MOVE.................................................................................................173 H-4 ALL WORK EQUIPMENT,SWING,TRAVEL LACK POWER....................................................................................................174 H-5 ABNORMAL NOISE GENERATED FROM AROUND PUMP.....................................................................................................174 H-6 WORK EQUIPMENT SPEED IS SLOW (ONE OF BOOM,ARM,BUCKET,OFFSET IS SLOW)..........................................................................175 H-7 WORK EQUIPMENT LACKS POWER (ONE OF BOOM,ARM,BUCKET,OFFSET LACKS POWER)........................................................................176 H-8 WORK EQUIPMENT DOES NOT MOVE (ONE OF BOOM,ARM,BUCKET,OFFSET DOES NOT MOVE)....................................................................176 H-9 EXCESSIVE HYDRAULIC DRIFT.....................................................................................................................177 H-10 EXCESSIVE TIME LAG...........................................................................................................................177 H-11 WHEN MACHINE IS TRAVELING,IT DEVIATES NATURALLY TO ONE SIDE..................................................................................178 a) DEVIATES IN SAME DIRECTION BOTH IN FORWARD AND REVERSE.....................................................................................178 b) DEVIATES IN DIFFERENT DIRECTION IN FORWARD AND REVERSE.....................................................................................180 H-12 EXCESSIVE DEVIATION WHEN STARTING............................................................................................................181 H-13 TRAVEL LACKS POWER (OR SPEED IS SLOW)........................................................................................................181 H-14 TRACK DOES NOT MOVE (ONE SIDE ONLY)..........................................................................................................182 H-15 TRAVEL LEVER IS HEAVY........................................................................................................................182 H-16 DOES NOT SWING...............................................................................................................................183 H-17 SWING SPEED IS SLOW OR ACCELERATION IS POOR..................................................................................................183 H-18 EXCESSIVE OVERRUN WHEN STOPPING SWING........................................................................................................184 H-19 EXCESSIVE SHOCK WHEN STOPPING SWING..........................................................................................................185 H-20 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING ................................................................................................185 H-21 EXCESSIVE HYDRAULIC DRIFT OF SWING...........................................................................................................186 H-22 ERROR CODE [61] IS DISPLAYED ON MONITOR PANEL,AND JUST BEFORE INTERFERENCE,BOOM RAISE,ARM IN,AND LEFT OFFSET ALL STOP........................187 H-23 BOOM RAISE,ARM IN,AND LEFT OFFSET DO NOT AUTOMATICALLY STOP AND THERE IS INTERFERENCE........................................................188 TABLE OF FAILURE MODES AND CAUSES.................................................................................................................189 TROUBLESHOOTING OF MACHINE MONITOR SYSTEM (M MODE)....................................................................................................190 M-1 WHEN THE STARTING SWITCH IS TURNED ON,NO DISPLAY IS GIVEN (LAMPS DO NOT LIGHT UP FOR 3 SECONDS)...............................................191 M-2 WHEN STARTING SWITCH IS TURNED ON,LAMPS LIGHT UP FOR 3 SECONDS,BUT THEN DO NOT GO OUT.........................................................191 M-3 WHEN STARTING SWITCH IS TURNED ON,SOME LAMPS DO NOT LIGHT UP FOR 3 SECONDS....................................................................192 a) NO GAUGE LAMPS LIGHT UP PREHEATING PILOT DOES NOT LIGHT UP.................................................................................192 b) BATTERY ELECTROLYTE LEVEL CAUTION LAMP DOES NOT LIGHT UP ,ELECTRIC SYSTEM CAUTION LAMP DOES NOT LIGHT UP...................................192 c) CHARGE CAUTION LAMP DOES NOT LIGHT UP......................................................................................................192 d) ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP.........................................................................................192 M-4 WHEN STARTING SWITCH IS ON (ENGINE STOPPED),CHARGE CAUTION LAMP DOES NOT LIGHT UP.............................................................193 M-5 WHEN STARTING SWITCH IS ON(ENGINE STOPPED),ENGINE OIL PRESSURE CAUTION LAMP DOES NOT LIGHT UP.................................................193 M-6 DURING PREHEATING,PREHEATING PILOT LAMP DOES NOT LIGHT UP ....................................................................................194 M-7 WHEN STARTING SWITCH IS ON (ENGINE STOPPED),BATTERY ELECTROLYTE LEVEL CAUTION LAMP LIGHTS UP (BATTERY ELECTROLYTE IS AT SPECIFIED LEVEL)......194 M-8 WHEN ENGINE IS RUNNNG,ENGINE OIL PESSURE CAUTION LAMP LIGHTS UP (ENGINE OIL PRESSURE IS NORMAL)...............................................195 M-9 WHEN ENGINE IS RNNING,CHARGE CAUTION LAMP LIGHTS UP...........................................................................................195 M-10 ABNORMALITY DISPLAY ON COOLANT TEMPERATURE GAUGE ............................................................................................196 a) AFTER ENGINE IS STARTED,LEVEL STAYS AT BOTTOM AND DOES NOT MOVE ...........................................................................196 b) AFTER ENGINE IS STARTED,LEVEL IMMEDIATELY RISES, ENGINE IS NOT OVERHEATING BUT INDICATOR ENTERS RED RANGE..................................196 M-11 ABNORMALITY DISPLAY ON FUEL GAUGE............................................................................................................197 a) ALL FUEL GAUGE SEGMENTS GO OUT.............................................................................................................197 b) EVEN WHEN FUEL LEVEL GOES DOWN,FUEL GAUGE CONTINUES TO SHOW FULL...........................................................................197 c) EVEN WHEN TANK IS FILLED,FUEL GAUGE DOES NOT SHOW FULL.....................................................................................198 M-12 DEFECTIVE OPERATION OF ALARM BUZZER..........................................................................................................199 a) BUZZER DOES NOT SOUND......................................................................................................................199 b) BUZZER CONTINUES TO SOUND AND DOES NOT STOP................................................................................................199 M-13 WHEN ENGINE IS RUNNING,SERVICE METER DOES NOT ADVANCE........................................................................................200 a) WHEN CHARGE CAUTION LAMP DOES NOT LIGHT UP.................................................................................................200 b) WHEN CHARGE CAUTION LAMP LIGHTS UP.........................................................................................................200 M-14 NIGHT LINGHTING DOES NOT LIGHT UP............................................................................................................201 a) LIGHTING OF COOLANT TEMPERATURE GAUGE,FUEL GAUGE,DEPTH DISPLAY DOES NOT LIGHT UP...........................................................201 b) LIGHTING OF SERVICE METER DOES NOT LIGHT UP ...............................................................................................201 M-15 ELECTRIC SYSTEM CAUTION LAMP STAYS LIGHTED UP,AND DOES NOT GO OUT (NO ABNORMALITY DISPLAY ON CONTROLLER,OPERATION IS NORMAL).................202 30 DISASSEMBLY AND ASSEMBLY...................................................................................................................................203 METHOD OF USING MANUAL....................................................................................................................................205 PRECAUTIONS WHEN CARRYING OUT OPERATION...................................................................................................................206 SPECIAL TOOLS LIST........................................................................................................................................208 SCHEMATIC DRAWING OF SPECIAL TOOL.........................................................................................................................212 STARTING MOTOR............................................................................................................................................218 REMOVAL AND INSTALLATION .............................................................................................................................218 ALTERNATOR ...............................................................................................................................................220 REMOVAL AND INSTALLATION..............................................................................................................................220 FUEL INJECTION PUMP.......................................................................................................................................221 REMOVAL AND INSTALLATION .............................................................................................................................221 WATER PUMP ...............................................................................................................................................224 REMOVAL...............................................................................................................................................224 INSTALLATION..........................................................................................................................................225 NOZZLE HOLDER.............................................................................................................................................226 REMOVAL AND INSTALLTION...............................................................................................................................226 THERMOSTAT................................................................................................................................................227 REMOVAL AND INSTALLATION..............................................................................................................................227 ENGINE FRONT SEAL.........................................................................................................................................228 REMOVAL AND INSTALLATION..............................................................................................................................228 ENGINE REAR SEAL..........................................................................................................................................229 REMOVAL AND INSTALLATION..............................................................................................................................229 CYLINDER HEAD.............................................................................................................................................230 REMOVAL...............................................................................................................................................230 INSTALLATION..........................................................................................................................................234 HYDRAULIC OIL COOLER......................................................................................................................................236 REMOVAL AND INSTALLATION..............................................................................................................................236 RADIATOR..................................................................................................................................................237 REMOVAL AND INSTALLATION..............................................................................................................................237 ENGINE AND MAIN PUMP......................................................................................................................................238 REMOVAL...............................................................................................................................................238 INSTALLATION..........................................................................................................................................241 DAMPER....................................................................................................................................................245 REMOVAL AND INSTALLATION..............................................................................................................................245 CENTER SWIVEL JOINT.......................................................................................................................................246 REMOVAL AND INSTALLATION..............................................................................................................................246 DISASSEMBLY AND ASSEMBLY..............................................................................................................................248 TRAVEL MOTOR..............................................................................................................................................249 REMOVAL AND INSTALLATION..............................................................................................................................249 SPROCKET..................................................................................................................................................250 REMOVAL AND INSTALLATION..............................................................................................................................250 SWING MOTOR AND SWING MACHINERY...........................................................................................................................251 REMOVAL AND INSTALLATION..............................................................................................................................251 SWING MOTOR ..............................................................................................................................................252 DISASSEMBLY...........................................................................................................................................252 ASSEMBLY..............................................................................................................................................256 SWING MACHINERY...........................................................................................................................................262 DISASSEMBLY...........................................................................................................................................262 ASSEMBLY..............................................................................................................................................269 REVOLVING FRAME...........................................................................................................................................276 REMOVAL ..............................................................................................................................................276 INSTALLATION..........................................................................................................................................277 SWING CIRCLE..............................................................................................................................................278 REMOVAL AND INSTALLATION..............................................................................................................................278 IDLER AND RECOIL SPRING...................................................................................................................................279 REMOVAL AND INSTALLATION..............................................................................................................................279 IDLER.....................................................................................................................................................280 DISASSEMBLY...........................................................................................................................................280 ASSEMBLY..............................................................................................................................................281 RECOIL SPRING.............................................................................................................................................283 DISASSEMBLY ..........................................................................................................................................283 ASSEMBLY..............................................................................................................................................284 TRACK ROLLER .............................................................................................................................................285 REMOVAL AND INSTALLATION..............................................................................................................................285 DISASSEMBLY...........................................................................................................................................286 ASSEMBLY..............................................................................................................................................289 RUBBER SHOE...............................................................................................................................................296 REMOVAL AND INSTALLATION..............................................................................................................................296 STEEL SHOE AND ROAD LINER ................................................................................................................................297 EXPANSION AND INSTALLATION............................................................................................................................297 PPC PUMP..................................................................................................................................................298 REMOVAL AND INSTALLATION..............................................................................................................................298 MAIN PUMP.................................................................................................................................................299 REMOVAL AND INSTALLATION..............................................................................................................................299 DISASSEMBLY...........................................................................................................................................300 ASSEMBLY..............................................................................................................................................307 3-SPOOL CONTROL VALVE.....................................................................................................................................315 REMOVAL...............................................................................................................................................315 INSTALLATION..........................................................................................................................................316 DISASSEMBLY...........................................................................................................................................319 ASSEMBLY..............................................................................................................................................321 4-SPOOL CONTROL VALVE.....................................................................................................................................323 REMOVAL ..............................................................................................................................................323 INSTALLATION..........................................................................................................................................324 MAIN RELIEF VALVE.........................................................................................................................................325 REMOVAL AND INSTALLATION..............................................................................................................................325 DISASSEMBLY AND ASSEMBLY..............................................................................................................................326 PPC VALVE ASSEMBLY ON LEFT SIDE OF WORK EQUIPMENT.........................................................................................................327 REMOVAL AND INSTALLATION..............................................................................................................................327 PPC VALVE ON RIGHT SIDE OF WORK EQUIPMENT.................................................................................................................328 REMOVAL AND INSTALLATION..............................................................................................................................328 WORK EQUIPMENT PPC VALVE..................................................................................................................................329 DISASSEMBLY ..........................................................................................................................................329 ASSEMBLY..............................................................................................................................................331 PPC VALVE FOR OFFSET OPERATION............................................................................................................................334 REMOVAL AND INSTALLATION..............................................................................................................................334 ARM CYLINDER..............................................................................................................................................335 REMOVAL...............................................................................................................................................335 INSTALLATION..........................................................................................................................................336 BUCKERT CYLINDER..........................................................................................................................................337 REMOVAL...............................................................................................................................................337 INSTALLATION..........................................................................................................................................338 BOOM CYLINDER.............................................................................................................................................339 REMOVAL ..............................................................................................................................................339 INSTALLATION..........................................................................................................................................340 OFFSET CYLINDER...........................................................................................................................................341 REMOVAL...............................................................................................................................................341 INSTALLATION..........................................................................................................................................342 BLADE CYLINDER............................................................................................................................................343 REMOVAL ..............................................................................................................................................343 INSTALLATION..........................................................................................................................................344 HYDRAULIC CYLINDER........................................................................................................................................345 DISASSSEMBLY..........................................................................................................................................345 ASSEMBLY..............................................................................................................................................347 WORK EQUIPMENT............................................................................................................................................349 REMOVAL...............................................................................................................................................349 INSTALLATION..........................................................................................................................................350 BUCKET....................................................................................................................................................351 REMOVAL AND INSTALLATION..............................................................................................................................351 ARM.......................................................................................................................................................352 REMOVAL ..............................................................................................................................................352 INSTALLATION..........................................................................................................................................353 2ND BOOM..................................................................................................................................................354 REMOVAL ..............................................................................................................................................354 INSTALLATION..........................................................................................................................................356 BUCKET AND ARM............................................................................................................................................357 REMOVAL ..............................................................................................................................................357 INSTALLATION..........................................................................................................................................358 1ST BOOM..................................................................................................................................................359 REMOVAL ..............................................................................................................................................359 INSTALLATION..........................................................................................................................................360 BLADE.....................................................................................................................................................361 REMOVAL AND INSTALLATION..............................................................................................................................361 OPERATOR'S CAB............................................................................................................................................362 REMOVAL AND INSTALLATION..............................................................................................................................362 FLOOR FRAME...............................................................................................................................................363 REMOVAL ..............................................................................................................................................363 INSTALLATION..........................................................................................................................................364 FUEL TANK.................................................................................................................................................365 REMOVAL AND INSTALLATION..............................................................................................................................365 CONTROLLER................................................................................................................................................366 REMOVAL AND INSTALLATION..............................................................................................................................366 MONITOR...................................................................................................................................................367 REMOVAL AND INSTALLATION..............................................................................................................................367 COUNTERWEIGHT.............................................................................................................................................368 REMOVAL AND INSTALLATION..............................................................................................................................368 40 MAINTENANCE STANDARD.......................................................................................................................................369 SWING MACHINERY...........................................................................................................................................370 SWING CIRCLE..............................................................................................................................................371 TRACK FRAME,RECOIL SPRING.................................................................................................................................372 IDLER.....................................................................................................................................................373 TRACK ROLLER..............................................................................................................................................374 CARRIER ROLLER............................................................................................................................................375 SPROCKET..................................................................................................................................................377 TRACK SHOE................................................................................................................................................378 HYDRAULIC PUMP............................................................................................................................................379 3-SPOOL CONTROL VALVE(FOR FRONT PUMP).....................................................................................................................380 3-SPOOL CONTROL VALVE(FOR CENTER PUMP)....................................................................................................................382 4-SPOOL CONTROL VALVE.....................................................................................................................................384 SWING MOTOR...............................................................................................................................................385 CENTER SWIVEL JOINT.......................................................................................................................................386 PPC VALVE.................................................................................................................................................387 HYDRAULIC CYLINDER........................................................................................................................................389 WORK EQUIPMENT............................................................................................................................................390
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