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KOMATSU PC300-7 PC300LC-7 PC350-7 PC350LC-7 HYDRAULIC EXCAVATOR SHOP MANUAL – PDF DOWNLOAD
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KOMATSU PC300-7 PC300LC-7 PC350-7 PC350LC-7 HYDRAULIC EXCAVATOR SHOP MANUAL SEBM025808 – PDF DOWNLOAD
SERIAL NUMBERS:
PC300-7 40001 and up
PC300LC-7 40001 and up
PC350-7 20001 and up
PC350LC-7 20001 and up
PC300LC-7 J20001 and up
PC300LC-7 40001 and up
PC350-7 20001 and up
PC350LC-7 20001 and up
PC300LC-7 J20001 and up
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Description
KOMATSU PC300-7 PC300LC-7 PC350-7 PC350LC-7 HYDRAULIC EXCAVATOR SHOP MANUAL SEBM025808 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC300-7 PC300LC-7 PC350-7 PC350LC-7 HYDRAULIC EXCAVATOR SHOP MANUAL SEBM025808 – PDF DOWNLOAD
Language : English
Pages : 789
Downloadable : Yes
File Type : PDF
SERIAL NUMBERS:
PC300-7 40001 and up
PC300LC-7 40001 and up
PC350-7 20001 and up
PC350LC-7 20001 and up
PC300LC-7 J20001 and up
PC300LC-7 40001 and up
PC350-7 20001 and up
PC350LC-7 20001 and up
PC300LC-7 J20001 and up
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC300-7 PC300LC-7 PC350-7 PC350LC-7 HYDRAULIC EXCAVATOR SHOP MANUAL SEBM025808 – PDF DOWNLOAD
MAIN MENU.................................................................................................................................... 0 COVER........................................................................................................................................ 1 CONTENTS..................................................................................................................................... 2 SAFETY....................................................................................................................................... 9 SAFETY NOTICE............................................................................................................................ 9 FOREWORD..................................................................................................................................... 11 GENERAL.................................................................................................................................. 11 HOW TO READ THE SHOP MANUAL.............................................................................................................. 12 HOISTING INSTRUCTIONS.................................................................................................................... 13 METHOD OF DISSASSEMBLY, CONNECTING PUSH-RULL TYPE COUPLER................................................................................ 14 COATING MATERIALS........................................................................................................................ 16 STANDARD TIGHTENING TORQUE............................................................................................................... 18 CONVERSION TABLE......................................................................................................................... 22 UNITS.................................................................................................................................... 28 01 GENERAL................................................................................................................................... 29 SPECIFICATION DIMENSION DRAWINGS......................................................................................................... 30 SPECIFICATIONS........................................................................................................................... 32 PC300-7, PC300LC-7................................................................................................................... 32 PC350-7, PC350LC-7................................................................................................................... 34 WEIGHT TABLE............................................................................................................................. 36 PC300-7, PC300LC-7................................................................................................................... 36 PC350-7, PC350LC-7................................................................................................................... 38 FUEL, COOLANT AND LUBRICANTS............................................................................................................. 40 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD.............................................................................................. 41 ENGINE RELATED PARTS..................................................................................................................... 42 RADIATOR - OIL COOLER - AFTERCOOLER...................................................................................................... 43 POWER TRAIN.............................................................................................................................. 44 FINAL DRIVE ............................................................................................................................. 46 SPROCKET................................................................................................................................. 48 SWING MACHINERY.......................................................................................................................... 50 SWING CIRCLE............................................................................................................................. 52 TRACK FRAME - RECOIL SPRING.............................................................................................................. 54 IDLER.................................................................................................................................... 56 CARRIER ROLLER........................................................................................................................... 58 TRACK ROOLER............................................................................................................................. 59 TRACK SHOE............................................................................................................................... 60 HYDRAULIC EQUIPMENT LAYOUT DRAWING....................................................................................................... 64 HYDRAULIC TANK........................................................................................................................... 66 HYDRAULIC PUMP........................................................................................................................... 68 VARIABLE VOLUME VALVE.................................................................................................................... 89 CONTROL VALVE............................................................................................................................ 92 CLSS.....................................................................................................................................108 SELF PRESSURE REDUCING VALVE.............................................................................................................111 SWING MOTOR..............................................................................................................................114 REVERSE PREVENTION VALVE.................................................................................................................119 CENTER SWIVEL JOINT......................................................................................................................121 TRAVEL MOTOR.............................................................................................................................122 TRAVEL JUNCTION VALVE....................................................................................................................132 TRAVEL PPC SHUTTLE VALVE.................................................................................................................134 VALVE CONTROL............................................................................................................................138 WORK EQUIPMENT - SWING PPC VALVE.........................................................................................................139 TRAVEL PPC VALVE.........................................................................................................................143 SERVICE PPC VALVE........................................................................................................................152 SOLENOID VALVE...........................................................................................................................155 PPC ACCUMULATOR..........................................................................................................................157 RETURN OIL FILTER........................................................................................................................158 BOOM HYDRAULIC DRIFT PREVENTION VALVE....................................................................................................160 QUICK RETURN VALVE.......................................................................................................................166 LIFT CHECK VALVE.........................................................................................................................168 ATTACHMENT CIRCUIT SELECTOR VALVE........................................................................................................169 HYDRAULIC CYLINDER.......................................................................................................................171 WORK EQUIPMENT...........................................................................................................................173 AIR CONDITIONER..........................................................................................................................179 ENGINE CONTROL...........................................................................................................................180 ELECTRONIC CONTROL SYSTEM................................................................................................................186 MULTI MONITOR SYTEM......................................................................................................................210 7-SEGMENT MONITOR SYSTEM.................................................................................................................230 SENSOR...................................................................................................................................237 20 TESTING AND ADJUSTING.....................................................................................................................240 STANDARD VALVE TABLE FOR ENGINE RELATED PARTS............................................................................................241 STANDARD VALVE TABLE FOR CHASSIS RELATED PARTS...........................................................................................242 TESTING AND ADJUSTING....................................................................................................................250 TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING.....................................................................................251 INSPECTION AND ADJUSTMENT OF ENGINE RPM..............................................................................................253 MEASUREMENT OF AIR BOOST PRESSURE....................................................................................................255 MEASUREMENT OF EXHAUST GAS COLOR.....................................................................................................256 ADJUSTMENT OF VALVE CLEARANCE........................................................................................................257 MEASUREMENT OF COMPRESSION PRESSURE..................................................................................................259 MEASUREMENT OF BLOW-BY PRESSURE......................................................................................................260 INSPECTION AND ADJUSTMENT OF FUEL INJECTION TIMING...................................................................................261 MEASUREMENT OF ENGINE OIL PRESSURE...................................................................................................263 ADJUSTMENT OF ENGINE SPEED SENSOR....................................................................................................264 INSPECTION AND ADJUSTMENT OF AIR COMPRESSOR BELT TENSION.............................................................................264 EMERGENCY ESCAPE FROM FAILURE IN ENGINE CONTROL SYSTEM...............................................................................265 MEASUREMENT OF CLEARANCE IN SWING CIRCLE BEARINGS....................................................................................266 INSPECTION AND ADJUSTMENT OF TRACK SHOE TENSION......................................................................................267 INSPECTION OF WEAR ON SPROCKET.......................................................................................................267 INSPECTION AND ADJUSTMENT OF HYDRAULIC OIL PRESSURE IN HYDRAULIC CIRCUIT FOR WORK EQUIPMENT, SWING AND TRAVEL........................268 INSPECTION AND ADJUSTMENT OF CONTROL CIRCUIT OIL PRESSURE............................................................................272 INSPECTION AND ADJUSTMENT OF PUMP PC CONTROL CIRCUIT OIL PRESSURE....................................................................273 INSPECTION AND ADJUSTMENT OF PUMP LS CONTROL CIRCUIT OIL PRESSURE....................................................................276 MEASUREMENT OF SOLENOID VALVE OUTPUT PRESSURE........................................................................................280 MEASUREMENT OF PPC VALVE OUTPUT PRESSURE.............................................................................................283 ADJUSTMENT OF WORK EQUIPMENT AND SWING PPC VALVE.....................................................................................284 INSPECTION OF LOCATIONS OF HYDRAULIC DRIFT OF WORK EQUIPMENT.........................................................................285 RELEASE OF REMAINING PRESSURE IN HYDRAULIC CIRCUIT...................................................................................286 MEASUREMENT OF OIL LEAKAGE AMOUNT....................................................................................................287 AIR BLEEDING OF VARIOUS PARTS........................................................................................................289 INSPECTION PROCEDURES FOR DIODE......................................................................................................291 SPECIAL FUNCTION OF MULTI-MONITOR PANEL..............................................................................................292 DISPLAY METHOD AND SPECIAL FUNCTIONS OF 7-SEGMENT MONITOR PANEL......................................................................317 PREPARATIONS FOR TROUBLESHOOTING ELECTRICAL SYSTEM...................................................................................333 TROUBLESHOOTING..........................................................................................................................339 POINTS TO REMEMBER WHEN TROUBLESHOOTING..............................................................................................340 SEQUENCE OF EVENTS IN TROUBLESHOOTING................................................................................................341 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE.....................................................................................342 CHECKS BEFORE TROUBLESHOOTING........................................................................................................350 CLASSIFICATION AND STEPS FOR TROUBLESHOOTING.........................................................................................351 CONNECTOR LOCATION CHART AND ELECTRICAL CIRCUIT DIAGRAM BY SYSTEM....................................................................355 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS...........................................................................................387 TROUBLESHOOTING WHEN SERVICE CODE "ELECTRICAL SYSTEM" AND FAILURE CODE "MECHANICAL SYSTEM" ARE INDICATED............................413 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE...................................................................................421 SERVICE CODE IN ELECTRICAL SYSTEM [E101] (ABNORMAL DATA IN ERROR HISTORY)........................................................423 SERVICE CODE IN ELECTRICAL SYSTEM [E112] (SHORT-CIRCUITING IN NORMAL ROTATION SYSTEM OF WINDSHEILD WIPER MOTOR DRIVE)............427 SERVICE CODE IN ELECTRICAL SYSTEM [E113] (SHORT-CIRCUITING IN NORMAL ROTATION SYSTEM OF WINDSHEILD WIPER MOTOR DRIVE)............429 SERVICE CODE IN ELECTRICAL SYSTEM [E114] (SHORT-CIRCUITING IN WINDOW WASHER DRIVE SYSTEM)........................................431 SERVICE CODE IN ELECTRICAL SYSTEM [E115] (ABNORMAL WINDSHIELD WIPER MOTION)......................................................433 SERVICE CODE IN ELECTRICAL SYSTEM [E116] (ABNORMALITY IN RETRACTING WINDSHELID WIPER)............................................435 SERVICE CODE IN ELECTRICAL SYSTEM [E201] (SHORT-CIRCUITING IN TRAVEL INTERLOCKING SOLENOID)......................................437 SERVICE CODE IN ELECTRICAL SYSTEM [E203] (SHORT-CIRCUITING IN SWING AQND PARKING BRAKE SOLENOID-IN GOVERNOR - PUMP CONTROLLER....441 SERVICE CODE IN ELECTRICAL SYSTEM [E204] (SHORT-CIRCUITING IN MERGE/DIVIDE SOLENOID).............................................445 SERVICE CODE IN ELECTRICAL SYSTEM [E205] (SHORT-CIRCUITING IN 2-STAGE RELIEF SOLENOID)...........................................449 SERVICE CODE IN ELECTRICAL SYSTEM [E211] (DISCONNECTION IN TRAVEL INTERLOCKING SOLENOID..........................................457 SERVICE CODE IN ELECTRICAL SYSTEM [E213] (DISCONNECTION IN SWING PARKING BRAKE SOLENOID).........................................461 SERVICE CODE IN ELECTRICAL SYSTEM [E214] (DISCONNECTION MERGE/DIVIDE SOLENOID)...................................................465 SERVICE CODE IN ELECTRICAL SYSTEM [E215] (DISCONNECTION IN 2-STAGE RELIEF SOLENOID)..............................................469 SERVICE CODE IN ELECTRICAL SYSTEM [E216] (DISCONNECTION IN TRAVEL SPEED SHIFTING SOLENOID).......................................473 SERVICE CODE IN ELECTRICAL SYSTEM [E217] (ABNORMALITY IN INPUTTING MODEL CODE)...................................................477 SERVICE CODE IN ELECTRICAL SYSTEM [E218] (DISCONNECTION OF S-NET SIGNAL).........................................................479 SERVICE CODE IN ELECTRICAL SYSTEM [E222] (SHORT-CIRCUITING IN LS-EPC SOLENOID)...................................................481 SERVICE CODE IN ELECTRICAL SYSTEM [E223] (DISCONNECTION IN LS-EPC SOLENOID)......................................................482 SERVICE CODE IN ELECTRICAL SYSTEM [E224] (ABNORMALITY IN F PUMP PRESSURE SENSOR).................................................483 SERVICE CODE IN ELECTRICAL SYSTEM [E225] (ABNORMALITY IN R PUMP PRESSURE SENSOR).................................................485 SERVICE CODE IN ELECTRICAL SYSTEM [E226] (ABNORMALITY IN PRESSURE SENSOR POWER SOURCE)...........................................487 SERVICE CODE IN ELECTRICAL SYSTEM [E227] (ABNORMALITY IN ENGINE ROTATION SENSOR IN GOVERNOR - PUMP CONTROLLER SYSTEM)............489 SERVICE CODE IN ELECTRICAL SYSTEM [E228] (SHORT-CIRCUITING IN ATTACHMENT RETURN SWITCHING RELAY).................................490 SERVICE CODE IN ELECTRICAL SYSTEM [E232] (SHORT-CIRCUITING IN PC-EPC SOLENOID)...................................................491 SERVICE CODE IN ELECTRICAL SYSTEM [E233] (DISCONNECTION IN PC-EPC SOLENOID SYSTEM)...............................................493 SERVICE CODE IN ELECTRICAL SYSTEM [E238] (DISCONNECTION IN ATTACHMENT RETURN SWITCHING RELAY)....................................495 SERVICE CODE IN ELECTRICAL EQUIPMENT [E245] (SHORT-CIRCUITING IN ATTACHMENT OIL FLOW RATE ADJUSTING EPC) (MULTI-MONITOR ONLY)....497 SERVICE CODE IN ELECTRICAL EQUIPMENT [E246] (DISCONNECTION IN ATTACHMENT OIL FLOW RATE ADJUSTING EPC) (MULTI-MONITOR ONLY).......498 SERVICE CODE IN ELECTRICAL SYSTEM [E256] (INCORRECT NONVOLATILE MEMORY DATA).....................................................499 SERVICE CODE IN ELECTRICAL SYSTEM [E304] (SHORT CIRCUIT OF ENGINE STOP SOLENIOD RELAY)...........................................500 SERVICE CODE IN ELECTRICAL SYSTEM [E306] (ABNORMALITY IN GOVERNOR POTENTIOMETER).................................................503 SERVICE CODE IN ELECTRICAL SYSTEM [E308] (ABNORMALITY IN FUEL DIAL)..............................................................505 SERVICE CODE IN ELECTRICAL SYSTEM [E314] (DISCOONECTION OF ENGINE STOP SOLENOID RELAY) ..........................................507 SERVICE CODE IN ELECTRICAL SYSTEM [E315] (SHORT-CIRCUIT IN BATTERY RELAY) .......................................................510 SERVICE CODE IN ELECTRICAL SYSTEM [E316] (STEP-OUT IN GOVERNOR MOTOR) ...........................................................512 SERVICE CODE IN ELECTRICAL SYSTEM [E317] (DISCONNECTION IN GOVERNOR MOTOR PHASE A AND PHASE B) ..................................513 SERVICE CODE IN ELECTRICAL SYSTEM [E318] (SHORT-CIRCUITING IN GOVERNOR MOTOR PHASE A AND PHASE B) ...............................515 FAILURE CODE IN MECHANICAL SYSTEM [A000N1] (OUT-OF RATE ENGINE ROTATION AT HIGH IDLING) .........................................517 FAILURE CODE IN MECHANICAL SYSTEM [A000N2] (OUT-OF RATE ENGINE ROTATION AT LOW IDLING) ..........................................517 FAILURE CODE IN MECHANICAL SYSTEM [AA10NX] (AIR CLEANER CLOGGING) ...............................................................518 FAILURE CODE IN MECHANICAL SYSTEM [AB00KE] (ABNORMALLY LOWERED CHARGING VOLTAGE).................................................519 FAILURE CODE IN MECHANICAL SYSTEM [B@BAZG] (ABNORMALLY LOWERED ENGINE OIL PRESSURE)..............................................522 FAILURE CODE IN MECHANICAL SYSTEM [B@BAZK] (ABNORMALLY LOWERED ENGINE OIL LEVEL).................................................523 FAILURE CODE IN MECHANICAL SYSTEM [B@BCNS] (ENGINE COOLING WATER OVERHEATING)....................................................524 FAILURE CODE IN MECHANICAL SYSTEM [B@BCZK] (ABNORMALLY LOWERED RADIATOR WATER LEVEL).............................................525 FAILURE CODE IN MECHANICAL SYSTEM [B@HANS] (HYDRAULIC OIL OVERHEATING)...........................................................526 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE)........................................................................................527 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE...................................................................................528 E-1 ENGINE DOES NOT START........................................................................................................529 E-2 ENGINE STOPS WHILE IN OPERATION..............................................................................................536 E-3 ENGINE SPEED IS IRREGULAR, OR THERE IS HUNTING...............................................................................537 E-4 ENGINE DOES NOT STOP.........................................................................................................540 E-5 AUTO-DECELERATOR DOES NOT WORK...............................................................................................543 E-6 AUTO ENGINE WARM-UP DEVICE DOES NOT WORK.....................................................................................544 E-7 PREHEATER DOES NOT WORK......................................................................................................545 E-8 ALL WORK EQUIPMENT, SWING AND TRAVEL DO NOT MOVE.............................................................................547 E-9 ONE-TOUCH POWER-MAX. SWITCH DOES NOT WORK....................................................................................549 E-10 NO DISPLAY IN MONITOR PANEL AT ALL..........................................................................................550 E-11 PART OF DISPLAY ON MONITOR PANEL IS MISSING.................................................................................552 E-12 MONITOR PANEL DISPLAYS CONTENTS IRRELEVANT TO THE MODEL.....................................................................552 E-13 FUEL LEVEL MONOTOR RED LAMP LIGHTS UP WHILE ENGINE IS RUNNING...............................................................553 E-14 ENGINE COOLING WATER TEMPERATURE GAUGE DOES NOT INDICATE CORRECTLY..........................................................554 E-15 HYDRAULIC OIL TEMPERATURE GAUGE DOES NOT DISPLAY CORRECTLY..................................................................555 E-16 FUEL GAUGE DOES NOT DISPLAY CORRECTLY.......................................................................................556 E-17 SWING LOCK MONITOR DOES NOT DISPLAY CORRECTLY...............................................................................557 E-18 WHEN THE MONITOR SWITCH IS OPERATED, NO DISPLAY APPEARS.....................................................................558 E-19 WINDSHEILD WIPER DOES NOT WORK..............................................................................................560 E-20 ALARMING BUZZER CANNOT BE CANCELLED.........................................................................................562 E-21 "BOOM RAISE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.................................................................563 E-22 "BOOM LOWER" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.................................................................564 E-23 "ARM DIGGING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION................................................................565 E-24 "ARM DUMPPING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION...............................................................566 E-25 "BUCKET DIGGING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.............................................................567 E-26 "BUCKET DUMPING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.............................................................568 E-27 "SWING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION......................................................................570 E-28 "TRAVEL" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.....................................................................572 E-29 "TRAVEL DIFFERENTIAL PRESSURE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION...............................................574 E-30 "SERVICE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION....................................................................576 E-31 AIR CONDITIONER DOES NOT WORK...............................................................................................578 E-32 TRAVEL ALARM DOES NOT SOUND.................................................................................................591 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H-MODE)..........................................................................593 SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEMS................................................................................594 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE...................................................................................596 H-1 ALL WORK EQUIPMENT LACK POWER, OR TRAVEL AND SWING SPEEDS ARE SLOW...........................................................597 H-2 ENGINE SPEED SHARPLY DROPS OR ENGINE STALLS..................................................................................598 H-3 NO WORK EQUIPMENT, TRAVEL OR SWING MOVE......................................................................................599 H-4 ABNORMAL NOISE IS HEARD FROM AROUND HYDRAULIC PUMP...........................................................................599 H-5 AUTO-DECELERATOR DOES NOT WORK...............................................................................................600 H-6 FINE CONTROL MODE DOES NOT FUNCTION..........................................................................................600 H-7 BOOM MOVES SLOWLY OR LACKS POWER.............................................................................................601 H-8 ARM MOVES SLOWLY OR LACKS POWER..............................................................................................602 H-9 BUCKET MOVES SLOWLY OR LACKS POWER...........................................................................................603 H-10 WORK EQUIPMENT DOES NOT MOVE................................................................................................603 H-11 WORK EQUIPMENT HAS A BIT TOO FAST HYDRAULIC DRIFT...........................................................................604 H-12 WORK EQUIPMENT HAS A BIG TIME LAG...........................................................................................605 H-13 OTHER WORK EQUIPMENT MOVES WHEN RELIEVING SINGLE CIRCUIT....................................................................605 H-14 ONE-TOUCH POWER MAX, SWITCH DOES NOT OPERATE................................................................................605 H-15 IN COMPOUND OPERATION, WORK EQUIPMENT WITH LARGER LOAD MOVES SLOWLY.........................................................606 H-16 IN SWING + BOOM RAISE OPERATION, BOOM MOVES SLOWLY..........................................................................606 H-17 IN SWING + TRAVEL, TRAVEL SPEED DROPS SHARPLY...............................................................................606 H-18 MACHINE SWERVES IN TRAVEL ..................................................................................................607 H-19 MACHINE TRAVEL SLOWLY.......................................................................................................608 H-20 MACHINE CANNOT BE EASILY STEERED OR LACKS POWER.............................................................................609 H-21 TRAVEL SPEED DOES NOT SHIFT, OR IT IS TOO SLOW OR FAST......................................................................610 H-22 TRACK SHOE DOES NOT TURN (ONE SIDE ONLY)....................................................................................610 H-23 MACHINE DOES NOT SWING......................................................................................................611 H-24 SWING ACCELERATION IS POOR, OR SWING SPEED IS SLOW).........................................................................612 H-25 EXCESSIVE OVERRUN WHEN STOPPING SWING.......................................................................................613 H-26 THERE IS BIG SHOCK WHEN STOPPING SWING.....................................................................................614 H-27 THERE IS BIG ABNORMAL NOISE CAUSED WHEN STOPPING SWING......................................................................614 H-28 SWING NATURAL DRIFT IS TOO BIG..............................................................................................615 TROUBLESHOOTING OF ENGINE (S-MODE)...................................................................................................616 METHOD OF USING TROUBLESHOOTING CHARTS...........................................................................................617 S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME)....................................................................621 S-2 ENGINE DOES NOT START........................................................................................................623 (1) ENGINE DOES NOT TURN.....................................................................................................623 (2) ENGINE TURNS BUT NO EXHAUST SMOKE COMES OUT (FUEL IS NOT BEING INJECTED).................................................624 (3) EXHAUST SMOKE COME OUT BUT ENGINE DOES NOT START (FUEL IS BEING INJECTED)................................................625 S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR).........................................................................626 S-4 ENGINE STOPS DURING OPERATIONS...............................................................................................627 S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING)....................................................................................628 S-6 ENGINE LACKS OUTPUT (OR LACK POWER)..........................................................................................629 S-7 EXHAUS SMOKE IS BLACK (INCOMPLETE CMBUSTION).................................................................................630 S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE)......................................................................631 S-9 OIL BECOMES CONTAMINATED QUICKLY.............................................................................................632 S-10 FUEL CONSUMPTION IS EXCESSIVE...............................................................................................633 S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN.....................................................634 S-12 OIL PRESSURE MONITOR LIGHT UP (DROP IN OIL PRESSURE)........................................................................635 S-13 OIL LEVEL RISES (WATER, FUEL IN OIL)........................................................................................636 S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING)............................................................................637 S-15 ABNORMAL NOISE IS MADE......................................................................................................638 S-16 VIBRATION IS EXCESSIVE......................................................................................................639 30 DISSASSEMBLY AND ASSEMBLY.................................................................................................................640 HOW TO READ MANUAL.......................................................................................................................642 REMOVAL AND INSTALLATION OF ASSEMBLIES...............................................................................................642 DISASSEMBLY AND ASSEMBLY OF ASSEMBLIES...............................................................................................643 PRECAUTIONS WHEN PERFORMING OPERATION....................................................................................................644 SPECIAL TOOL LIST........................................................................................................................646 STARTING MOTOR ASSEMBLY..................................................................................................................652 REMOVAL..............................................................................................................................652 INSTALLATION.........................................................................................................................652 FUEL INJECTION PUMP ASSEMBLY.............................................................................................................653 SPECIAL TOOLS........................................................................................................................653 REMOVAL..............................................................................................................................653 INSTALLATION.........................................................................................................................655 ENGINE FRONT SEAL........................................................................................................................657 REMOVAL..............................................................................................................................657 INSTALLATION.........................................................................................................................657 ENGINE REAR SEAL.........................................................................................................................664 REMOVAL..............................................................................................................................664 INSTALLATION.........................................................................................................................664 CYLINDER HEAD ASSEMBLY...................................................................................................................666 SPECIAL TOOLS........................................................................................................................666 REMOVAL..............................................................................................................................666 INSTALLATION.........................................................................................................................669 RADIATOR ASSEMBLY........................................................................................................................672 REMOVAL..............................................................................................................................672 INSTALLATION.........................................................................................................................673 HYDRAULIC OIL COOLER ASSEMBLY............................................................................................................674 REMOVAL..............................................................................................................................674 INSTALLATION.........................................................................................................................675 ENGINE AND HYDRAULIC PUMP ASSEMBLIES.....................................................................................................676 SPECIAL TOOLS........................................................................................................................676 REMOVAL..............................................................................................................................676 INSTALLATION.........................................................................................................................679 FINAL DRIVE ASSEMBLY.....................................................................................................................680 REMOVAL..............................................................................................................................680 INSTALLATION.........................................................................................................................680 DISASSEMBLY AND ASSEMBLY.............................................................................................................681 SPECIAL TOOLS....................................................................................................................681 DISASSEMBLY .....................................................................................................................681 ASSEMBLY.........................................................................................................................684 SWING MOTOR, SWING MACHINERY ASSEMBLY....................................................................................................691 REMOVAL..............................................................................................................................691 INSTALLATION.........................................................................................................................691 DISASSEMBLY AND ASSEMBLY.............................................................................................................692 SPECIAL TOOLS....................................................................................................................692 DISASSEMBLY .....................................................................................................................692 ASSEMBLY.........................................................................................................................694 CARRIER ROLLER ASSEMBLY..................................................................................................................708 SPECIAL TOOLS........................................................................................................................708 ASSEMBLY.............................................................................................................................708 TRACK ROLLER ASSEMBLY....................................................................................................................709 SPECIAL TOOLS........................................................................................................................709 ASSEMBLY.............................................................................................................................709 IDLER ASSEMBLY...........................................................................................................................710 SPECIAL TOOLS........................................................................................................................710 DISASSEMBLY..........................................................................................................................710 ASSEMBLY.............................................................................................................................711 RECOIL SPRING ASSEMBLY...................................................................................................................713 SPECIAL TOOLS........................................................................................................................713 DISASSEMBLY..........................................................................................................................713 ASSEMBLY.............................................................................................................................714 SPROCKET.................................................................................................................................715 REMOVAL..............................................................................................................................715 INSTALLATION.........................................................................................................................715 TRACK SHOE ASSEMBLY......................................................................................................................716 SPECIAL TOOLS .......................................................................................................................716 EXPANSION OF TRACK SHOE..............................................................................................................716 ASSEMBLY.............................................................................................................................717 SWING CIRCLE ASSEMBLY....................................................................................................................718 REMOVAL..............................................................................................................................718 INSTALLATION.........................................................................................................................718 REVOLVING FRAME ASSEMBLY.................................................................................................................719 REMOVAL..............................................................................................................................719 INSTALLATION.........................................................................................................................721 HYDRAULIC TANK ASSEMBLY..................................................................................................................725 REMOVAL..............................................................................................................................725 INSTALLATION.........................................................................................................................726 CONTROL VALVE ASSEMBLY...................................................................................................................727 REMOVAL..............................................................................................................................727 INSTALLATION.........................................................................................................................729 DISASSEMBLY AND ASSEMBLY.............................................................................................................730 SPECIAL TOOLS....................................................................................................................730 ASSEMBLY.........................................................................................................................731 HYDRAULIC PUMP ASSEMBLY..................................................................................................................734 SPECIAL TOOLS........................................................................................................................734 REMOVAL..............................................................................................................................734 INSTALLATION.........................................................................................................................736 OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT...................................................................................................737 REMOVAL .............................................................................................................................737 INSTALLATION.........................................................................................................................737 WORK EQUIPMENT PPC VALVE ASSEMBLY........................................................................................................738 ASSEMBLY.............................................................................................................................738 TRAVEL PPC VALVE ASSEMBLY................................................................................................................741 ASSEMBLY.............................................................................................................................741 HYDRAULIC CYLINDER ASSEMBLY .............................................................................................................742 SPECIAL TOOLS........................................................................................................................742 DISASSEMBLY..........................................................................................................................742 ASSEMBLY.............................................................................................................................744 WORK EQUIPMENT ASSEMBLY..................................................................................................................748 SPECIAL TOOLS........................................................................................................................748 REMOVAL..............................................................................................................................748 INSTALLATION.........................................................................................................................749 AIR CONDITIONER UNIT ASSEMBLY............................................................................................................751 SPECIAL TOOLS........................................................................................................................751 REMOVAL..............................................................................................................................751 INSTALLATION.........................................................................................................................753 COUNTERWEIGHT ASSEMBLY...................................................................................................................756 REMOVAL..............................................................................................................................756 INSTALLATION.........................................................................................................................756 OPERATOR'S CAB ASSEMBLY..................................................................................................................757 REMOVAL..............................................................................................................................757 INSTALLATION.........................................................................................................................758 MONITOR ASSEMBLY.........................................................................................................................759 REMOVAL..............................................................................................................................759 INSTALLATION.........................................................................................................................761 GOVERNOR PUMP CONTROLLER ASSEMBLY........................................................................................................760 REMOVAL..............................................................................................................................760 INSTALLATION.........................................................................................................................760 90 OTHERS....................................................................................................................................780 HYDRAULIC DIAGRAM........................................................................................................................781 PC300-7, PC300LC-7: Serial No. 40001 – 45000 PC350-7, PC350LC-7: Serial No. 20001 - 25000................................................782 ELECTRICAL DIAGRAM (1/4).............................................................................................................782 ELECTRICAL DIAGRAM (2/4).............................................................................................................783 ELECTRICAL DIAGRAM (3/4).............................................................................................................784 ELECTRICAL DIAGRAM (4/4).............................................................................................................785 PC300-7,PC300LC-7: Serial No. 45001 and up PC350-7,PC350LC-7: Serial No. 25001 and up....................................................780 ELECTRICAL CIRCUIT DIAGRAM (1/4).....................................................................................................786 ELECTRICAL CIRCUIT DIAGRAM (2/4).....................................................................................................787 ELECTRICAL CIRCUIT DIAGRAM (3/4).....................................................................................................788 ELECTRICAL CIRCUIT DIAGRAM (4/4).....................................................................................................789
DESCRIPTION:
KOMATSU PC300-7 PC300LC-7 PC350-7 PC350LC-7 HYDRAULIC EXCAVATOR SHOP MANUAL SEBM025808 – PDF DOWNLOAD
Foreword
General
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.
S.S 30/12/24
