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KOMATSU PC300, 300LC-7 PC350, 350LC-7 SHOP MANUAL SEBM025811 – PDF DOWNLOAD
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Description
KOMATSU PC300, 300LC-7 PC350, 350LC-7 SHOP MANUAL SEBM025811 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU PC300, 300LC-7 PC350, 350LC-7 SHOP MANUAL SEBM025811 – PDF DOWNLOAD
Language : English
Pages : 775
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU PC300, 300LC-7 PC350, 350LC-7 SHOP MANUAL SEBM025811 – PDF DOWNLOAD
COVER............................................................................................................................................. 1 CONTENTS.......................................................................................................................................... 2 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................................................................................................................................... 45 SPROCKET...................................................................................................................................... 47 SWING MACHINERY............................................................................................................................... 49 SWING CIRCLE.................................................................................................................................. 51 TRACK FRAME・RECOIL SPRING..................................................................................................................... 52 IDLER......................................................................................................................................... 54 CARRIER ROLLER................................................................................................................................ 56 TRACK ROLLER.................................................................................................................................. 57 TRACK SHOE.................................................................................................................................... 58 HYDRAULIC EQUIPMENT LAYOUT DRAWING............................................................................................................ 62 HYDRAULIC TANK................................................................................................................................ 64 HYDRAULIC PUMP................................................................................................................................ 65 VARIABLE VOLUME VALVE......................................................................................................................... 86 CONTROL VALVE................................................................................................................................. 88 CLSS..........................................................................................................................................103 SELF PRESSURE REDUCING VALVE..................................................................................................................106 SWING MOTOR...................................................................................................................................109 REVERSE PREVENTION VALVE......................................................................................................................114 CENTER SWIVEL JOINT...........................................................................................................................116 TRAVEL MOTOR..................................................................................................................................117 TRAVEL JUNCTION VALVE.........................................................................................................................127 TRAVEL PPC SHUTTLE VALVE......................................................................................................................129 VALVE CONTROL.................................................................................................................................133 WORK EQUIPMENT・SWING PPC VALVE................................................................................................................134 TRAVEL PPC VALVE..............................................................................................................................138 SERVICE PPC VALVE.............................................................................................................................147 SOLENOID VALVE................................................................................................................................150 PPC ACCUMULATOR...............................................................................................................................152 RETURN OIL FILTER.............................................................................................................................153 BOOM HYDRAULIC DRIFT PREVENTION VALVE.........................................................................................................154 QUICK RETURN VALVE............................................................................................................................160 LIFT CHECK VALVE..............................................................................................................................162 ATTACHMENT CIRCUIT SELECTOR VALVE.............................................................................................................163 HYDRAULIC CYLINDER............................................................................................................................165 WORK EQUIPMENT................................................................................................................................167 AIR CONDITIONER...............................................................................................................................173 ENGINE CONTROL................................................................................................................................174 ELECTRONIC CONTROL SYSTEM.....................................................................................................................180 MULTI MONITOR SYSTEM..........................................................................................................................204 7-SEGMENT MONITOR SYSTEM......................................................................................................................224 SENSOR........................................................................................................................................231 20 TESTING AND ADJUSTING..........................................................................................................................234 STANDARD VALUE TABLE FOR ENGINE RELATED PARTS.................................................................................................235 STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS................................................................................................236 TESTING AND ADJUSTING.........................................................................................................................244 TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING..........................................................................................245 INSPECTION AND ADJUSTMENT OF ENGINE RPM...................................................................................................247 MEASUREMENT OF AIR BOOST PRESSURE.........................................................................................................249 MEASUREMENT OF EXHAUST GAS COLOR..........................................................................................................250 ADJUSTMENT OF VALVE CLEARANCE.............................................................................................................251 MEASUREMENT OF COMPRESSION PRESSURE.......................................................................................................253 MEASUREMENT OF BLOW-BY PRESSURE...........................................................................................................254 INSPECTION AND ADJUSTMENT OF FUEL INJECTION TIMING........................................................................................255 MEASUREMENT OF ENGINE OIL PRESSURE........................................................................................................257 ADJUSTMENT OF ENGINE SPEED SENSOR.........................................................................................................258 INSPECTION AND ADJUSTMENT OF AIR COMPRESSOR BELT TENSION..................................................................................258 EMERGENT ESCAPE FROM FAILURE IN ENGINE CONTROL SYSTEM.....................................................................................259 MEASUREMENT OF CLEARANCE IN SWING CIRCLE BEARINGS.........................................................................................260 INSPECTION AND ADJUSTMENT OF TRACK SHOE TENSION...........................................................................................261 INSPECTION OF WEAR ON SPROCKET............................................................................................................261 INSPECTION AND ADJUSTMENT OF HYDRAULIC OIL PRESSURE IN HYDRAULIC CIRCUIT FOR WORK EQUIPMENT, SWING AND TRAVEL.............................262 INSPECTION AND ADJUSTMENT OF CONTROL CIRCUIT OIL PRESSURE.................................................................................266 INSPECTION AND ADJUSTMENT OF PUMP PC CONTROL CIRCUIT OIL PRESSURE.........................................................................267 INSPECTION AND ADJUSTMENT OF PUMP LS CONTROL CIRCUIT OIL PRESSURE.........................................................................270 MEASUREMENT OF SOLENOID VALVE OUTPUT PRESSURE.............................................................................................274 MEASUREMENT OF PPC VALVE OUTPUT PRESSURE..................................................................................................277 ADJUSTMENT OF WORK EQUIPMENT AND SWING PPC VALVE..........................................................................................278 INSPECTION OF LOCATIONS OF HYDRAULIC DRIFT OF WORK EQUIPMENT..............................................................................279 RELEASE OF REMAINING PRESSURE IN HYDRAULIC CIRCUIT........................................................................................280 MEASUREMENT OF OIL LEAKAGE AMOUNT.........................................................................................................281 AIR BLEEDING OF VARIOUS PARTS.............................................................................................................283 INSPECTION PROCEDURES FOR DIODE...........................................................................................................285 SPECIAL FUNCTION OF MULTI-MONITOR PANEL...................................................................................................286 SPECIAL FUNCTIONS OF 7-SEGMENTS MONITOR PANEL.............................................................................................311 PREPARATIONS FOR TROUBLESHOOTING ELECTRICAL SYSTEM........................................................................................327 TROUBLESHOOTING...............................................................................................................................333 POINTS TO REMEMBER WHEN TROUBLESHOOTING...................................................................................................334 SEQUENCE OF EVENTS IN TROUBLESHOOTING.....................................................................................................335 POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE..........................................................................................336 CHECKS BEFORE TROUBLESHOOTING.............................................................................................................344 CLASSIFICATION AND STEPS FOR TROUBLESHOOTING..............................................................................................345 CONNECTOR LOCATION CHART AND ELECTRICAL CIRCUIT DIAGRAM BY SYSTEM.........................................................................349 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS................................................................................................381 TROUBLESHOOTING WHEN SERVICE CODE "ELECTRICAL SYSTEM" AND FAILURE CODE "MECHANICAL SYSTEM" ARE INDICATED..................................406 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE........................................................................................414 SERVICE CODE IN ELECTRICAL SYSTEM [E101] (ABNORMAL DATA IN ERROR HISTORY).............................................................416 SERVICE CODE IN ELECTRICAL SYSTEM [E112] (SHORT-CIRCUITING IN NORMAL ROTATION SYSTEM OF WINDSHIELD WIPER MOTOR DRIVE).................420 SERVICE CODE IN ELECTRICAL SYSTEM [E113] (SHORT-CIRCUITING IN REVERSE ROTATION SYSTEM OF WINDSHIELD WIPER MOTOR DRIVE)................422 SERVICE CODE IN ELECTRICAL SYSTEM [E114] (SHORT-CIRCUITING IN WINDOW WASHER DRIVE SYSTEM).............................................424 SERVICE CODE IN ELECTRICAL SYSTEM [E115] (ABNORMAL WINDSHIELD WIPER MOTION)...........................................................426 SERVICE CODE IN ELECTRICAL SYSTEM [E116] (ABNORMALITY IN RETRACTING WINDSHIELD WIPER).................................................428 SERVICE CODE IN ELECTRICAL SYSTEM [E201] (SHORT-CIRCUITING IN TRAVEL INTERLOCKING SOLENOID)...........................................430 SERVICE CODE IN ELECTRICAL SYSTEM [E203] (SHORT-CIRCUITING IN SWING AND PARKING BRAKE SOLENOID-IN GOVERNOR・PUMP CONTROLLER SYSTEM)....434 SERVICE CODE IN ELECTRICAL SYSTEM [E204] (SHORT-CIRCUITING IN MERGE/DIVIDE SOLENOID)..................................................438 SERVICE CODE IN ELECTRICAL SYSTEM [E205] (SHORT-CIRCUITING IN 2-STAGE RELIEF SOLENOID)................................................442 SERVICE CODE IN ELECTRICAL SYSTEM [E206] (SHORT-CIRCUITING IN TRAVEL SPEED SHIFTING SOLENOID).........................................446 SERVICE CODE IN ELECTRICAL SYSTEM [E211] (DISCONNECTION IN TRAVEL INTERLOCKING SOLENOID)..............................................450 SERVICE CODE IN ELECTRICAL SYSTEM [E213] (DISCONNECTION IN SWING PARKING BRAKE SOLENOID)..............................................454 SERVICE CODE IN ELECTRICAL SYSTEM [E214] (DISCONNECTION OF MERGE/DIVIDE SOLENOID).....................................................458 SERVICE CODE IN ELECTRICAL SYSTEM [E215] (DISCONNECTION IN 2-STAGE RELIEF SOLENOID)...................................................462 SERVICE CODE IN ELECTRICAL SYSTEM [E216] (DISCONNECTION IN TRAVEL SPEED SHIFTING SOLENOID)............................................466 SERVICE CODE IN ELECTRICAL SYSTEM [E217] (ABNORMALITY IN INPUTTING MODEL CODE)........................................................470 SERVICE CODE IN ELECTRICAL SYSTEM [E218] (DISCONNECTION OF S-NET SIGNAL)..............................................................472 SERVICE CODE IN ELECTRICAL SYSTEM [E222] (SHORT-CIRCUITING IN LS-EPC SOLENOID)........................................................474 SERVICE CODE IN ELECTRICAL SYSTEM [E223] (DISCONNECTION IN LS-EPC SOLENOID SYSTEM)....................................................475 SERVICE CODE IN ELECTRICAL SYSTEM [E224] (ABNORMALITY IN F PUMP PRESSURE SENSOR)......................................................476 SERVICE CODE IN ELECTRICAL SYSTEM [E225] (ABNORMALITY IN R PUMP PRESSURE SENSOR)......................................................478 SERVICE CODE IN ELECTRICAL SYSTEM [E226] (ABNORMALITY IN PRESSURE SENSOR POWER SOURCE)................................................480 SERVICE CODE IN ELECTRICAL SYSTEM [E227] (ABNORMALITY IN ENGINE ROTATION SENSOR IN GOVERNOR・PUMP CONTROLLER SYSTEM)...................482 SERVICE CODE IN ELECTRICAL SYSTEM [E228] (SHORT-CIRCUITING IN ATTACHMENT RETURN SWITCHING RELAY)......................................483 SERVICE CODE IN ELECTRICAL SYSTEM [E232] (SHORT-CIRCUITING IN PC-EPC SOLENOID)........................................................484 SERVICE CODE IN ELECTRICAL SYSTEM [E233] (DISCONNECTION IN PC-EPC SOLENOID SYSTEM)....................................................486 SERVICE CODE IN ELECTRICAL SYSTEM [E238] (DISCONNECTION IN ATTACHMENT RETURN SWITCHING RELAY).........................................488 SERVICE CODE IN ELECTRICAL EQUIPMENT [E245] (SHORT-CIRCUITING IN ATTACHMENT OIL FLOW RATE ADJUSTING EPC)(MULTI-MONITOR ONLY)..........490 SERVICE CODE IN ELECTRICAL SYSTEM [E246] (DISCONNECTION IN ATTACHMENT OIL FLOW RATE ADJUSTING EPC)(MULTI-MONITOR ONLY)................491 SERVICE CODE IN ELECTRICAL SYSTEM [E256] (INCORRECT NONVOLATILE MEMORY DATA)..........................................................492 SERVICE CODE IN ELECTRICAL SYSTEM [E304] (SHORT CIRCUIT OF ENGINE STOP SOLENOID RELAY)................................................493 SERVICE CODE IN ELECTRICAL SYSTEM [E306] (ABNORMALITY IN GOVERNOR POTENTIOMETER)......................................................496 SERVICE CODE IN ELECTRICAL SYSTEM [E308] (ABNORMALITY IN FUEL DIAL)...................................................................498 SERVICE CODE IN ELECTRICAL SYSTEM [E314] (DISCONNECTION OF ENGINE STOP SOLENOID RELAY)................................................500 SERVICE CODE IN ELECTRICAL SYSTEM [E315] (SHORT-CIRCUITING IN BATTERY RELAY)..........................................................503 SERVICE CODE IN ELECTRICAL SYSTEM [E316] (STEP-OUT IN GOVERNOR MOTOR).................................................................505 SERVICE CODE IN ELECTRICAL SYSTEM [E317] (DISCONNECTION IN GOVERNOR MOTOR PHASE A AND B)..............................................506 SERVICE CODE IN ELECTRICAL SYSTEM [E318] (SHORT-CIRCUITING IN GOVERNOR MOTOR PHASE A AND PHASE B).....................................508 FAILURE CODE IN MECHANICAL SYSTEM [A000N1] (OUT-OF-RATE ENGINE ROTATION AT HIGH IDLING)...............................................510 FAILURE CODE IN MECHANICAL SYSTEM [A000N2] (OUT-OF-RATE ENGINE ROTATION AT LOW IDLING)................................................510 FAILURE CODE IN MECHANICAL SYSTEM [AA10NX] (AIR CLEANER CLOGGING).....................................................................511 FAILURE CODE IN MECHANICAL SYSTEM [AB00KE] (ABNORMALLY LOWERED CHARGING VOLTAGE)......................................................512 FAILURE CODE IN MECHANICAL SYSTEM [B@BAZG] (ABNORMALLY LOWERED ENGINE OIL PRESSURE)...................................................515 FAILURE CODE IN MECHANICAL SYSTEM [B@BAZK] (ABNORMALLY LOWERED ENGINE OIL LEVEL)......................................................516 FAILURE CODE IN MECHANICAL SYSTEM [B@BCNS] (ENGINE COOLING WATER OVERHEATING).........................................................517 FAILURE CODE IN MECHANICAL SYSTEM [B@BCZK] (ABNORMALLY LOWERED RADIATOR WATER LEVEL)..................................................518 FAILURE CODE IN MECHANICAL SYSTEM [B@HANS] (HYDRAULIC OIL OVERHEATING)................................................................519 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE).............................................................................................520 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE........................................................................................521 E-1 ENGINE DOES NOT START ............................................................................................................522 E-2 ENGINE STOPS WHILE IN OPERATION...................................................................................................529 E-3 ENGINE SPEED IS IRREGULAR, OR THERE IS HUNTING....................................................................................530 E-4 ENGINE DOES NOT STOP..............................................................................................................532 E-5 AUTO-DECELERATOR DOES NOT WORK....................................................................................................535 E-6 AUTO ENGINE WARM-UP DEVICE DOES NOT WORK..........................................................................................536 E-7 PREHEATER DOES NOT WORK...........................................................................................................537 E-8 ALL WORK EQUIPMENT, SWING AND TRAVEL DO NOT MOVE..................................................................................539 E-9 ONE-TOUCH POWER MAX. SWITCH DOES NOT WORK.........................................................................................541 E-10 NO DISPLAY IN MONITOR PANEL AT ALL...............................................................................................542 E-11 PART OF DISPLAY ON MONITOR PANEL IS MISSING......................................................................................544 E-12 MONITOR PANEL DISPLAYS CONTENTS IRRELEVANT TO THE MODEL..........................................................................544 E-13 FUEL LEVEL MONITOR RED LAMP LIGHTS UP WHILE ENGINE IS RUNNING....................................................................545 E-14 ENGINE COOLING WATER TEMPERATURE GAUGE DOES NOT INDICATE CORRECTLY...............................................................546 E-15 HYDRAULIC OIL TEMPERATURE GAUGE DOES NOT DISPLAY CORRECTLY.......................................................................547 E-16 FUEL GAUGE DOES NOT DISPLAY CORRECTLY............................................................................................548 E-17 SWING LOCK MONITOR DOES NOT DISPLAY CORRECTLY....................................................................................549 E-18 WHEN THE MONITOR SWITCH IS OPERATED, NO DISPLAY APPEARS..........................................................................550 E-19 WINDSHIELD WIPER DOES NOT WORK...................................................................................................551 E-20 ALARMING BUZZER CANNOT BE CANCELLED..............................................................................................553 E-21 "BOOM RAISE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION......................................................................554 E-22 "BOOM LOWER" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION......................................................................555 E-23 "ARM DIGGING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.....................................................................556 E-24 "ARM DUMPING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.....................................................................557 E-25 "BUCKET DIGGING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION..................................................................558 E-26 "BUCKET DUMPING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION..................................................................559 E-27 "SWING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION...........................................................................560 E-28 "TRAVEL" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION..........................................................................562 E-29 "TRAVEL DIFFERENTIAL PRESSURE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION....................................................564 E-30 "SERVICE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION.........................................................................566 E-31 AIR CONDITIONER DOES NOT WORK....................................................................................................568 E-32 TRAVEL ALARM DOES NOT SOUND......................................................................................................581 TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H-MODE)...............................................................................583 SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEMS.....................................................................................584 INFORMATION CONTAINED IN TROUBLESHOOTING TABLE........................................................................................586 H-1 ALL WORK EQUIPMENT LACK POWER, OR TRAVEL AND SWING SPEEDS ARE SLOW................................................................587 H-2 ENGINE SPEED SHARPLY DROPS OR ENGINE STALLS.......................................................................................588 H-3 NO WORK EQUIPMENT, TRAVEL OR SWING MOVE...........................................................................................589 H-4 ABNORMAL NOISE IS HEARD FROM AROUND HYDRAULIC PUMP................................................................................589 H-5 AUTO-DECELERATOR DOES NOT WORK....................................................................................................590 H-6 FINE CONTROL MODE DOES NOT FUNCTION...............................................................................................590 H-7 BOOM MOVES SLOWLY OR LACKS POWER..................................................................................................591 H-8 ARM MOVES SLOWLY OR LACKS POWER...................................................................................................592 H-9 BUCKET MOVES SLOWLY OR LACKS POWER................................................................................................593 H-10 WORK EQUIPMENT DOES NOT MOVE IN ITS SINGLE OPERATION.............................................................................593 H-11 WORK EQUIPMENT HAS A BIT TOO FAST HYDRAULIC DRIFT................................................................................594 H-12 WORK EQUIPMENT HAS BIG TIME LAG..................................................................................................595 H-13 OTHER WORK EQUIPMENT MOVES WHEN RELIEVING SINGLE CIRCUIT.........................................................................595 H-14 ONE-TOUCH POWER MAX. SWITCH DOES NOT OPERATE.....................................................................................595 H-15 IN COMPOUND OPERATION, WORK EQUIPMENT WITH LARGER LOAD MOVES SLOWLY..............................................................596 H-16 IN SWING + BOOM RAISE OPERATION, BOOM MOVES SLOWLY...............................................................................596 H-17 IN SWING + TRAVEL, TRAVEL SPEED DROPS SHARPLY....................................................................................596 H-18 MACHINE SWERVES IN TRAVEL........................................................................................................597 H-19 MACHINE TRAVELS SLOWLY...........................................................................................................598 H-20 MACHINE CANNOT BE EASILY STEERED OR LACKS POWER..................................................................................599 H-21 TRAVEL SPEED DOES NOT SHIFT, OR IT IS TOO SLOW OR FAST...........................................................................600 H-22 TRACK SHOE DOES NOT TURN (ON ONE SIDE ONLY)......................................................................................600 H-23 MACHINE DOES NOT SWING...........................................................................................................601 H-24 SWING ACCELERATION IS POOR, OR SWING SPEED IS SLOW...............................................................................602 H-25 EXCESSIVE OVERRUN WHEN STOPPING SWING............................................................................................603 H-26 THERE IS BIG SHOCK WHEN STOPPING SWING...........................................................................................604 H-27 THERE IS BIG ABNORMAL NOISE CAUSED WHEN STOPPING SWING...........................................................................604 H-28 SWING NATURAL DRIFT IS TOO BIG...................................................................................................605 TROUBLESHOOTING OF ENGINE (S-MODE)........................................................................................................606 METHOD OF USING TROUBLESHOOTING CHARTS................................................................................................607 S-1 STARTING PERFORMACE IS POOR (STARTING ALWAYS TAKES TIME)..........................................................................611 S-2 ENGINE DOES NOT START ............................................................................................................613 S-3 ENGINE DOES NOT PICK UP SMOTHLY (FPLLOW-UP IS POOR)...............................................................................616 S-4 ENGINE STOPS DURING OPERATIONS....................................................................................................617 S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING).........................................................................................618 S-6 ENGINE LACKS OUTPUT (OR LACKS POWER)..............................................................................................619 S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION)....................................................................................620 S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE)...........................................................................621 S-9 OIL BECOMES CONTAMINATED QUICKLY..................................................................................................622 S-10 FUEL CINSUMPTION IS EXCESSIVE....................................................................................................623 S-11 OIL IS IN COOLING WATER, OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN..........................................................624 S-12 OIL PRESSURE MONITOR LIGHTS UP (DROP IN OIL PRESSURE)............................................................................625 S-13 OIL LEVEL RISES (WATER, FUEL IN OIL).............................................................................................626 S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING).................................................................................627 S-15 ABNORMAL NOISE IS MADE...........................................................................................................628 S-16 VIBRATION IS EXCESSIVE...........................................................................................................629 30 DISASSEMBLY AND ASSEMBLY.......................................................................................................................630 HOW TO READ THIS MANUAL.......................................................................................................................632 REMOVAL AND INSTALLATION OF ASSEMBLIES....................................................................................................632 DISASSEMBLY AND ASSEMBLY OF ASSEMBLIES....................................................................................................633 PRECAUTIONS WHEN PERFORMING OPERATION.........................................................................................................634 SPECIAL TOOL LIST.............................................................................................................................636 SKETCHES OF SPECIAL TOOLS.....................................................................................................................640 STARTING MOTOR ASSEMBLY.......................................................................................................................642 REMOVAL...................................................................................................................................642 INSTALLATION..............................................................................................................................642 FUEL INJECTION PUMP ASSEMBLY..................................................................................................................643 SPECIAL TOOLS.............................................................................................................................643 REMOVAL...................................................................................................................................643 INSTALLATION..............................................................................................................................645 ENGINE FRONT SEAL.............................................................................................................................647 REMOVAL...................................................................................................................................647 INSTALLATION..............................................................................................................................648 ENGINE REAR SEAL..............................................................................................................................649 SPECIAL TOOLS ............................................................................................................................649 REMOVAL...................................................................................................................................649 INSTALLATION..............................................................................................................................650 CYLINDER HEAD ASSEMBLY........................................................................................................................655 SPECIAL TOOLS.............................................................................................................................655 REMOVAL...................................................................................................................................655 INSTALLATION..............................................................................................................................658 RADIATOR ASSEMBLY.............................................................................................................................661 REMOVAL...................................................................................................................................661 INSTALLATION..............................................................................................................................662 HYDRAULIC OIL COOLER ASSEMBLY.................................................................................................................663 REMOVAL...................................................................................................................................663 INSTALLATION..............................................................................................................................664 ENGINE AND HYDRAULIC PUMP ASSEMBLIES..........................................................................................................665 SPECIAL TOOLS.............................................................................................................................665 REMOVAL...................................................................................................................................665 INSTALLATION..............................................................................................................................668 FINAL DRIVE ASSEMBLY..........................................................................................................................669 REMOVAL...................................................................................................................................669 INSTALLATION..............................................................................................................................669 DISASSEMBLY AND ASSEMBLY..................................................................................................................670 SPECIAL TOOLS.........................................................................................................................670 DISASSEMBLY...........................................................................................................................670 ASSEMBLY..............................................................................................................................673 SWING MOTOR,SWING MACHINERY ASSEMBLY..........................................................................................................679 REMOVAL...................................................................................................................................679 INSTALLATION..............................................................................................................................679 DISASSEMBLY AND ASSEMBLY..................................................................................................................680 SPECIAL TOOLS.........................................................................................................................680 DISASSEMBLY...........................................................................................................................680 ASSEMBLY..............................................................................................................................682 SWING MOTOR,SWING MACHINERY ASSEMBLY..........................................................................................................687 SPECIAL TOOLS ............................................................................................................................687 DISASSEMBLY...............................................................................................................................687 ASSEMBLY..................................................................................................................................689 CARRIER ROLLER ASSEMBLY.......................................................................................................................695 SPECIAL TOOLS.............................................................................................................................695 ASSEMBLY..................................................................................................................................695 TRACK ROLLER ASSEMBLY.........................................................................................................................696 SPECIAL TOOLS.............................................................................................................................696 ASSEMBLY..................................................................................................................................696 IDLER ASSEMBLY................................................................................................................................697 SPECIAL TOOLS.............................................................................................................................697 DISASSEMBLY...............................................................................................................................697 ASSEMBLY..................................................................................................................................698 RECOIL SPRING ASSEMBLY........................................................................................................................700 SPECIAL TOOLS.............................................................................................................................700 DISASSEMBLY...............................................................................................................................700 ASSEMBLY..................................................................................................................................701 SPROCKET......................................................................................................................................702 REMOVAL...................................................................................................................................702 INSTALLATION..............................................................................................................................702 TRACK SHOE ASSEMBLY...........................................................................................................................703 SPECIAL TOOLS.............................................................................................................................703 EXPANSION OF TRACK SHOE...................................................................................................................703 ASSEMBLY..................................................................................................................................704 SWING CIRCLE ASSEMBLY.........................................................................................................................705 REMOVAL...................................................................................................................................705 INSTALLATION..............................................................................................................................705 REVOLVING FRAME ASSEMBLY......................................................................................................................706 REMOVAL...................................................................................................................................706 INSTALLATION..............................................................................................................................708 CENTER SWIVEL JOINT ASSEMBLY..................................................................................................................709 REMOVAL...................................................................................................................................709 INSTALLATION..............................................................................................................................710 DISASSEMBLY AND ASSEMBLY..................................................................................................................711 SPECIAL TOOLS.........................................................................................................................711 DISASSEMBLY...........................................................................................................................711 ASSEMBLY..............................................................................................................................711 HYDRAULIC TANK ASSEMBLY.......................................................................................................................712 REMOVAL...................................................................................................................................712 INSTALLATION..............................................................................................................................713 CONTROL VALVE ASSEMBLY........................................................................................................................714 REMOVAL...................................................................................................................................714 INSTALLATION..............................................................................................................................716 DISASSEMBLY AND ASSEMBLY..................................................................................................................717 SPECIAL TOOLS.........................................................................................................................717 ASSEMBLY..............................................................................................................................718 HYDRAULIC PUMP ASSEMBLY.......................................................................................................................721 SPECIAL TOOLS.............................................................................................................................721 REMOVAL...................................................................................................................................721 INSTALLATION..............................................................................................................................723 OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT........................................................................................................724 REMOVAL...................................................................................................................................724 INSTALLATION..............................................................................................................................724 WORK EQUIPMENT PPC VALVE ASSEMBLY.............................................................................................................725 ASSEMBLY..................................................................................................................................725 TRAVEL PPC VALVE ASSEMBLY.....................................................................................................................727 ASSEMBLY..................................................................................................................................727 HYDRAULIC CYLINDER ASSEMBLY...................................................................................................................728 SPECIAL TOOLS.............................................................................................................................728 DISASSEMBLY...............................................................................................................................728 ASSEMBLY..................................................................................................................................730 WORK EQUIPMENT ASSEMBLY.......................................................................................................................734 SPECIAL TOOLS.............................................................................................................................734 REMOVAL...................................................................................................................................734 INSTALLATION..............................................................................................................................735 AIR CONDITIONER UNIT ASSEMBLY.................................................................................................................737 SPECIAL TOOLS.............................................................................................................................737 REMOVAL...................................................................................................................................737 INSTALLATION..............................................................................................................................739 COUNTERWEIGHT ASSEMBLY........................................................................................................................742 REMOVAL...................................................................................................................................742 INSTALLATION..............................................................................................................................742 OPERATOR'S CAB ASSEMBLY.......................................................................................................................743 REMOVAL...................................................................................................................................743 INSTALLATION..............................................................................................................................744 OPERATOR'S CAB GLASS (STUCK GLASS)............................................................................................................748 SPECIAL TOOLS ............................................................................................................................749 REMOVAL...................................................................................................................................749 INSTALLATION..............................................................................................................................750 FRONT WINDOW ASSEMBLY.........................................................................................................................758 REMOVAL...................................................................................................................................758 INSTALLATION..............................................................................................................................760 MONITOR ASSEMBLY..............................................................................................................................764 REMOVAL...................................................................................................................................764 INSTALLATION..............................................................................................................................764 GOVERNOR PUMP CONTROLLER ASSEMBLY.............................................................................................................765 REMOVAL...................................................................................................................................765 INSTALLATION..............................................................................................................................765 90 OTHERS.........................................................................................................................................766 HYDRAULIC CIRCUIT DIAGRAM.....................................................................................................................767 PC300-7, PC300LC-7: SERIAL NO.40001-45000 PC300-7, PC350LC-7: SERIAL NO.20001-25000 ..........................................................768 ELECTRICAL CIRCUIT DIAGRAM (1/4)..........................................................................................................768 ELECTRICAL CIRCUIT DIAGRAM (2/4)..........................................................................................................769 ELECTRICAL CIRCUIT DIAGRAM (3/4)..........................................................................................................770 ELECTRICAL CIRCUIT DIAGRAM (4/4)..........................................................................................................771 PC300-7, PC300LC-7: SERIAL NO.45001 AND UP PC300-7, PC350LC-7: SERIAL NO.25001 AND UP.........................................................772 ELECTRICAL CIRCUIT DIAGRAM (1/4)..........................................................................................................772 ELECTRICAL CIRCUIT DIAGRAM (2/4)..........................................................................................................773 ELECTRICAL CIRCUIT DIAGRAM (3/4)..........................................................................................................774 ELECTRICAL CIRCUIT DIAGRAM (4/4)..........................................................................................................775
DESCRIPTION:
KOMATSU PC300, 300LC-7 PC350, 350LC-7 SHOP MANUAL SEBM025811 – 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 26/12/24
