Komatsu PC750-7, PC750SE-7, PC750LC-7, PC800-7, PC800SE-7 Hydraulic Excavator Service Repair Workshop Manual - SEBM031307
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This Complete Service Repair Workshop Manual PDF Download for the Komatsu PC750-7, PC750SE-7, PC750LC-7, PC800-7, PC800SE-7 Hydraulic Excavator has easy to read text sections with top quality diagrams, pictures and illustrations. The step by step instructions show you how to fault find or complete any repair or overhaul, correctly and efficiently, saving time and avoiding costly mistakes. All specifications and tolerances are listed. Functions of components and systems are also explained.
APPLICABLE MODELS :
Komatsu PC750-7 - S/N: 20001 and up
Komatsu PC750SE-7 - S/N: 20001 and up
Komatsu PC750LC-7 - S/N: 20001 and up
Komatsu PC800-7 - S/N: 40001 and up
Komatsu PC800SE-7 - S/N: 40001 and up
TABLE OF CONTENTS :
- GENERAL
- STRUCTURE AND FUNCTION
- TESTING AND ADJUSTING
- DISASSEMBLY AND ASSEMBLY
- MAINTENANCE STANDARD
- OTHERS
MANUAL SPECIFICATION :
File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Product Code : SEBM031307
Total Pages : 836
This 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 is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!!
This manual PDF download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having PDF files instead of a hard-printed manual is that you can use the Search feature in Acrobat to find just what your looking for and just print out the exact pages you need or all manual.
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CONTENTS
01 GENERAL
SPECIFICATION DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
FUEL, COOLANT AND LUBRICANTS
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
PTO
PTO LUBRICATION SYSTEM
POWER TRAIN
SWING MACHINERY
SWING CIRCLE
FINAL DRIVE
SPROCKET
TRACK FRAME AND RECOIL SPRING
IDLER
CARRIER ROLLER
TRACK ROLLER
TRACK SHOE
MOTOR GREASE PUMP
HYDRAULIC TANK
HYDRAULIC PUMP
RETURN OIL FILTER
LINE OIL FILTER
DRAIN OIL FILTER
L.H. 5-SPOOL CONTROL VALVE
R.H. 4-SPOOL CONTROL VALVE
STRAIGHT-TRAVEL VALVE
SWING MOTOR
CENTER SWIVEL JOINT
TRAVEL MOTOR
PPC CONTROL RELIEF VALVE
PPC ACCUMULATOR
VALVE CONTROL
WORK EQUIPMENT, SWING PPC VALVE
TRAVEL PPC VALVE
SOLENOID VALVE
HYDRAULIC CYLINDER
WORK EQUIPMENT
DIMENSIONS OF WORK EQUIPMENT
AIR CONDITIONER
ENGINE CONTROL
MACHINE CONTROL SYSTEM
MONITOR SYSTEM
SENSORS
20 TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
TESTING AND ADJUSTING
TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
MEASURING ENGINE SPEED
MEASURING INTAKE AIR PRESSURE (BOOST PRESSURE)
MEASUREMENT OF EXHAUST GAS TEMPERATURE
MEASUREMENT OF EXHAUST GAS COLOR
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
MEASURING BLOW-BY PRESSURE
MEASURING ENGINE OIL PRESSURE
HANDLING OF FUEL SYSTEM EQUIPMENT
REMAINING PRESSURE RELIEF FROM FUEL SYSTEM EQUIPMENT
MEASUREMENT OF FUEL PRESSURE
TESTING LEAKAGE THROUGH PRESSURE LIMITER AND RETURN RATE FROM INJECTOR
AIR BLEEDING FROM FUEL CIRCUIT
INSPECTION OF LEAKAGE FROM FUEL SYSTEM
ADJUSTING ENGINE SPEED SENSOR
TESTING AND ADJUSTING FAN BELT TENSION
TESTING AND ADJUSTING ALTERNATOR BELT TENSION
TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT
INSPECTION OF SWING CIRCLE BEARING CLEARANCE
TESTING AND ADJUSTING TRACK SHOE TENSION
TESTING AND ADJUSTING WORK EQUIPMENT, SWING, AND TRAVEL CIRCUIT OIL PRESSURES
TESTING AND ADJUSTING CONTROL CIRCUIT OIL PRESSURE
TESTING AND ADJUSTING PISTON PUMP CONTROL PRESSURE
INSPECTION OF SERVO PISTON STROKE
MEASUREMENT OF PPC VALVE OUTPUT PRESSURE
MEASURING OUTLET PRESSURES OF SOLENOID VALVE, SWING PPC SHUTTLE VALVE, AND SWING PRIORITY SELECTOR VALVE
ADJUSTING WORK EQUIPMENT, SWING PPC VALVE
TESTING AND ADJUSTING TRAVEL DEVIATION
INSPECTION OF LOCATIONS OF HYDRAULIC DRIFT OF WORK EQUIPMENT
MEASURING OIL LEAKAGE
RELEASE OF RESIDUAL PRESSURE FROM HYDRAULIC CIRCUIT
BLEEDING AIR FROM EACH PART
INSPECTION PROCEDURES FOR DIODE
SPECIAL FUNCTION OF MONITOR PANEL
HANDLING ENGINE CONTROLLER HIGH VOLTAGE CIRCUIT
PREPARATION WORK
PM-CLINIC SERVICE
UNDERCARRIAGE INSPECTION
TROUBLESHOOTING
POINTS TO REMEMBER WHEN TROUBLESHOOTING
SEQUENCE OF EVENTS IN TROUBLESHOOTING
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE
CHECKS BEFORE TROUBLESHOOTING
CLASSIFICATION AND STEPS FOR TROUBLESHOOTING
CONNECTOR LOCATION CHART AND ELECTRICAL CIRCUIT DIAGRAM BY SYSTEM
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
T-BRANCH BOX AND T-BRANCH TABLE
TROUBLESHOOTING WHEN ERROR CODE "ELECTRICAL SYSTEM" AND FAILURE CODE "MECHANICAL SYSTEM" ARE DISPLAYED
BEFORE CARRYING OUT TROUBLESHOOTING OF DISPLAYED CODE
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE
ERROR CODE IN ELECTRICAL SYSTEM E112 (WIPER DRIVE (FOR) S/C)
ERROR CODE IN ELECTRICAL SYSTEM E113 (WIPER DRIVE (REV) S/C)
ERROR CODE IN ELECTRICAL SYSTEM E114 (WASHER DRIVE S/C)
ERROR CODE IN ELECTRICAL SYSTEM E115 (WIPER WORKING ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E116 (WIPER PARKING ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E117 (ENG. CONTROLLER S-NET COMM ERR.)
ERROR CODE IN ELECTRICAL SYSTEM E118 (PUMP CONTROLLER S-NET COMM ERR.)
ERROR CODE IN ELECTRICAL SYSTEM E128 (MONITOR COMM. ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E201 (CO CANCEL SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E202 (TRAVEL JUNCTION SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E203 (SWING BRAKE SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E204 (2-STAGE RELIEF SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E205 (SWING PRIORITY SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E206 (TRAVEL SPEED SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E207 (FLASH LIGHT RELAY S/C)
ERROR CODE IN ELECTRICAL SYSTEM E211 (CO CANCEL SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E212 (TRAVEL JUNCTION SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E213 (SWING BRAKE SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E214 (2-STAGE RELIEF SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E215 (SWING PRIORITY SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E216 (TRAVEL SPEED SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E217 (MODEL SELECTION ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E218 (S-NET COMM. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E221 (TRAVEL ALARM S/C)
ERROR CODE IN ELECTRICAL SYSTEM E224 (F PUMP P. SENSOR ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E225 (R PUMP P. SENSOR ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E226 (PRESS. SENSOR POWER ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E227 (ENGINE SPEED SENSOR ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E232 (TVC SOL. S/C)
ERROR CODE IN ELECTRICAL SYSTEM E233 (TVC SOL. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E257 (PUMP COMM. ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E302 (STEP LIGHT RELAY S/C)
ERROR CODE IN ELECTRICAL SYSTEM E304 (STEP LIGHT POWER HOLD RELAY S/C)
ERROR CODE IN ELECTRICAL SYSTEM E315 (BATTERY RELAY DRIVE S/C)
ERROR CODE IN ELECTRICAL SYSTEM E91B (ENGINE NE SENSOR PROBLEM)
ERROR CODE IN ELECTRICAL SYSTEM E91C (ENGINE G SENSOR PROBLEM)
ERROR CODE IN ELECTRICAL SYSTEM E920 (ENGINE TYPE SELECTION ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E921 (ENGINE TYPE MISMATCH)
ERROR CODE IN ELECTRICAL SYSTEM E931 (FUEL DIAL SYS. ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E934 (ENGINE COOLANT SENSOR HI ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E936 (ENGINE OIL PRESS. SW. ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E93C (ENGINE BOOST SENSOR ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E93D (ENGINE FUEL TEMP. SENSOR ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E953 (ENGINE COMM. ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E954 (SHORT ENGINE STARTER SW.)
ERROR CODE IN ELECTRICAL SYSTEM E955 (ENGINE S-NET ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E956 (ENGINE POWER FAILURE (1))
ERROR CODE IN ELECTRICAL SYSTEM E957 (ENGINE POWER FAILURE (2))
ERROR CODE IN ELECTRICAL SYSTEM E95A (ENGINE Q-ADJ. SW. SIGNAL ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E96A (ENGINE COOLANT SENSOR LO ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E970 (PCV1 OVER CURRENT)
ERROR CODE IN ELECTRICAL SYSTEM E971 (PCV2 OVER CURRENT)
ERROR CODE IN ELECTRICAL SYSTEM E974 (PCV1 LINE CUT)
ERROR CODE IN ELECTRICAL SYSTEM E975 (PCV2 LINE CUT)
ERROR CODE IN ELECTRICAL SYSTEM E977 (RAIL PRESS. SENSOR ERROR)
ERROR CODE IN ELECTRICAL SYSTEM E979 (RAIL PRESS. HIGH)
ERROR CODE IN ELECTRICAL SYSTEM E97A (RAIL PRESS. ABNORMAL)
ERROR CODE IN ELECTRICAL SYSTEM E97B (RAIL PRESS. LOW)
ERROR CODE IN ELECTRICAL SYSTEM E97C (RAIL PRESS. TOO LOW)
ERROR CODE IN ELECTRICAL SYSTEM E97D (RAIL PRESS. OUT OF CONTROL)
ERROR CODE IN ELECTRICAL SYSTEM E980 (ENG. CONTROLLER ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM E981 (FUEL INJECTOR 1 DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E982 (FUEL INJECTOR 2 DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E983 (FUEL INJECTOR 3 DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E984 (FUEL INJECTOR 4 DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E985 (FUEL INJECTOR 5 DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E986 (FUEL INJECTOR 6 DISC.)
ERROR CODE IN ELECTRICAL SYSTEM E98A (FUEL INJECTOR 1-3 S/C)
ERROR CODE IN ELECTRICAL SYSTEM E98B (FUEL INJECTOR 4-6 S/C)
FAILURE CODE IN MECHANICAL SYSTEM A000N1 (ENG. HI OUT OF STD)
FAILURE CODE IN MECHANICAL SYSTEM AA10NX (AIRCLEANER CLOGGING)
FAILURE CODE IN MECHANICAL SYSTEM AB00KE (CHARGE VOLTAGE LOW)
FAILURE CODE IN MECHANICAL SYSTEM [email protected] (ENG. OIL PRESS. LOW)
FAILURE CODE IN MECHANICAL SYSTEM [email protected] (ENG. OIL LEVEL LOW)
FAILURE CODE IN MECHANICAL SYSTEM [email protected] (ENG. COOLANT OVERHEAT)
FAILURE CODE IN MECHANICAL SYSTEM [email protected] (ENG. COOLANT LVL LOW)
FAILURE CODE IN MECHANICAL SYSTEM [email protected] (HYDR. OIL OVERHEAT)
FAILURE CODE IN MECHANICAL SYSTEM DA80MA (AUTO. LUB ABNORMAL)
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)
BEFORE CARRYING OUT TROUBLESHOOTING (E-MODE)
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE
E-1 ENGINE DOES NOT START (ENGINE DOES NOT ROTATE)
E-2 PREHEATER DOES NOT OPERATE
E-3 AUTO ENGINE WARM-UP DEVICE DOES NOT WORK
E-4 AUTO-DECELERATOR DOES NOT OPERATE
E-5 ALL WORK EQUIPMENT, SWING AND TRAVEL DO NOT MOVE
E-6 MACHINE PUSH-UP FUNCTION DOES NOT OPERATE NORMALLY
E-7 BOOM SHOCKLESS FUNCTION DOES NOT OPERATE NORMALLY
E-8 ANY ITEM IS NOT DISPLAYED ON MONITOR PANEL
E-9 PART OF DISPLAY ON MONITOR PANEL IS MISSING
E-10 MONITOR PANEL DISPLAYS CONTENTS IRRELEVANT TO THE MODEL
E-11 FUEL LEVEL MONITOR RED LAMP LIGHTS UP WHILE ENGINE IS RUNNING
E-12 ENGINE COOLANT THERMOMETER DOES NOT DISPLAY NORMALLY
E-13 HYDRAULIC OIL TEMPERATURE GAUGE DOES NOT DISPLAY CORRECTLY
E-14 FUEL GAUGE DOES NOT DISPLAY CORRECTLY
E-15 SWING LOCK MONITOR DOES NOT DISPLAY CORRECTLY
E-16 WHEN MONITOR SWITCH IS OPERATED, NOTHING IS DISPLAYED
E-17 WINDSHIELD WIPER AND WINDOW WASHER DO NOT WORK
E-18 ALARMING BUZZER CANNOT BE CANCELLED
E-19 "BOOM RAISE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-20 "BOOM LOWER" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-21 "ARM IN" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-22 "ARM OUT" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-23 "BUCKET CURL" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-24 "BUCKET DUMP" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-25 "SWING" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-26 "LEFT TRAVEL" IS NOT DISPLAYED NORMALLY IN MONITORING FUNCTION
E-27 "RIGHT TRAVEL" IS NOT DISPLAYED NORMALLY IN MONITORING FUNCTION
E-28 "SERVICE" IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-29 AIR CONDITIONER DOES NOT WORK
E-30 STEP LIGHT DOES NOT LIGHT UP OR GO OFF
E-31 ELECTRIC GREASE GUN DOES NOT OPERATE
E-32 TRAVEL ALARM DOES NOT SOUND OR DOES NOT STOP SOUNDING
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE)
BEFORE TROUBLESHOOTING FOR HYDRAULIC AND MECHANICAL SYSTEMS (H MODE)
INFORMATION IN TROUBLESHOOTING TABLE
H-1 SPEED OR POWER OF ALL WORK EQUIPMENT, TRAVEL, AND SWING IS LOW
H-2 ENGINE SPEED LOWERS REMARKABLY OR ENGINE STALLS
H-3 ALL WORK EQUIPMENT, TRAVEL, AND SWING SYSTEMS DO NOT WORK
H-4 ABNORMAL SOUND IS HEARD FROM AROUND PUMP
H-5 BOOM SPEED OR POWER IS LOW
H-6 SPEED OR POWER OF ARM IS LOW
H-7 SPEED OR POWER OF BUCKET IS LOW
H-8 BOOM DOES NOT MOVE
H-9 ARM DOES NOT MOVE
H-10 BUCKET DOES NOT MOVE
H-11 HYDRAULIC DRIFT OF WORK EQUIPMENT IS LARGE
H-12 TIME LAG OF WORK EQUIPMENT IS LARGE
H-13 HEAVY LIFT FUNCTION DOES NOT OPERATE OR STOP
H-14 MACHINE PUSH-UP FUNCTION DOES NOT OPERATE OR STOP
H-15 BOOM SHOCKLESS FUNCTION CANNOT BE TURNED ON OR OFF
H-16 MACHINE DEVIATES IN ONE DIRECTION
H-17 MACHINE DEVIATES LARGELY AT START
H-18 MACHINE DEVIATES LARGELY DURING COMPOUND OPERATION
H-19 TRAVEL SPEED OR POWER IS LOW
H-20 MACHINE DOES NOT TRAVEL (ONLY ONE TRACK)
H-21 TRAVEL SPEED DOES NOT CHANGE
H-22 UPPER STRUCTURE DOES NOT SWING
H-23 SWING SPEED OR ACCELERATION IS LOW
H-24 SWING SPEED OR ACCELERATION IS LOW DURING COMPOUND OPERATION OF SWING AND WORK EQUIPMENT
H-25 UPPER STRUCTURE OVERRUNS EXCESSIVELY WHEN IT STOPS SWINGING
H-26 LARGE SHOCK IS MADE WHEN UPPER STRUCTURE STOPS SWINGING
H-27 LARGE ABNORMAL SOUND IS MADE WHEN UPPER STRUCTURE STOPS SWINGING
H-28 HYDRAULIC DRIFT OF SWING IS LARGE
TROUBLESHOOTING OF ENGINE (S MODE)
POINTS TO REMEMBER WHEN TROUBLESHOOTING
METHOD OF USING TROUBLESHOOTING CHARTS
S-1 STARTING PERFORMANCE IS POOR (STARTING ALWAYS TAKES TIME)
S-2 ENGINE DOES NOT START
S-3 ENGINE DOES NOT PICK UP SMOOTHLY (FOLLOW-UP IS POOR)
S-4 ENGINE STOPS DURING OPERATIONS
S-5 ENGINE DOES NOT ROTATE SMOOTHLY (HUNTING)
S-6 ENGINE LACKS OUTPUT (OR LACKS POWER)
S-7 EXHAUST SMOKE IS BLACK (INCOMPLETE COMBUSTION)
S-8 OIL CONSUMPTION IS EXCESSIVE (OR EXHAUST SMOKE IS BLUE)
S-9 OIL BECOMES CONTAMINATED QUICKLY
S-10 FUEL CONSUMPTION IS EXCESSIVE
S-11 OIL IS IN COOLING (OR COOLANT SPURTS BACK, OR COOLANT LEVEL GOES DOWN)
S-12 OIL PRESSURE CAUTION LAMP LIGHTS UP (DROP IN OIL PRESSURE)
S-13 OIL LEVEL RISES (COOLANT, FUEL IN OIL)
S-14 COOLANT TEMPERATURE BECOMES TOO HIGH (OVERHEATING)
S-15 ABNORMAL NOISE IS MADE
S-16 VIBRATION IS EXCESSIVE
30 DISASSEMBLY AND ASSEMBLY
METHOD OF USING MANUAL
PRECAUTIONS WHEN CARRYING OUT OPERATION
SPECIAL TOOL LIST
REMOVAL AND INSTALLATION OF FUEL SUPPLY PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL INJECTOR ASSEMBLY
REMOVAL AND INSTALLATION OF NOZZLE TIP
REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL
REMOVAL AND INSTALLATION OF ENGINE REAR SEAL
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL AND INSTALLATION OF AFTERCOOLER CORE
REMOVAL AND INSTALLATION OF FAN GUARD, RADIATOR AND HYDRAULIC OIL COOLER ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL COOLER AND AIR CONDITIONER CONDENSER ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE, PTO AND HYDRAULIC PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF PTO ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF PTO ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY
REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY
REMOVAL AND INSTALLATION OF SWING MACHINERY ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF SWING MACHINERY ASSEMBLY
REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY
REMOVAL AND INSTALLATION OF TRACK SHOE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF ONE LINK IN FIELD
REMOVAL AND INSTALLATION OF IDLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF IDLER ADJUSTMENT CYLINDER ASSEMBLY
REMOVAL AND INSTALLATION OF RECOIL SPRING ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY
REMOVAL AND INSTALLATION OF CARRIER ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY
REMOVAL AND INSTALLATION OF TRACK ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL AND INSTALLATION OF MAIN PUMP (NO.1 PUMP) ASSEMBLY
REMOVAL AND INSTALLATION OF MAIN PUMP (NO.2 PUMP)
REMOVAL AND INSTALLATION OF MAIN PUMP INPUT SHAFT OIL SEAL
REMOVAL AND INSTALLATION OF CONTROL AND PTO LUBRICATION PUMP ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF MAIN RELIEF VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY (WORK EQUIPMENT)
REMOVAL AND INSTALLATION OF SOLENOID VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF BOOM DAMPING VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF SWING MOTOR ASSEMBLY
REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT
DISASSEMBLY AND ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY
REMOVAL AND INSTALLATION OF TRAVEL MOTOR ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF BUCKET CYLINDER ASSEMBLY (BACK HOE)
REMOVAL AND INSTALLATION OF BUCKET CYLINDER ASSEMBLY (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF ARM CYLINDER ASSEMBLY (BACK HOE)
REMOVAL AND INSTALLATION OF ARM CYLINDER ASSEMBLY (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF BOOM CYLINDER ASSEMBLY (BACK HOE)
REMOVAL AND INSTALLATION OF BOOM CYLINDER ASSEMBLY (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF BOTTOM DUMP CYLINDER ASSEMBLY (LOADING SHOVEL)
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY
REMOVAL AND INSTALLATION OF BUCKET ASSEMBLY (BACK HOE)
REMOVAL AND INSTALLATION OF BUCKET ASSEMBLY (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF ARM ASSEMBLY (BACK HOE)
REMOVAL AND INSTALLATION OF ARM ASSEMBLY (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF BOOM ASSEMBLY (BACK HOE)
REMOVAL AND INSTALLATION OF BOOM ASSEMBLY (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF WORK EQUIPMENT (BACK HOE)
REMOVAL AND INSTALLATION OF WORK EQUIPMENT (LOADING SHOVEL)
REMOVAL AND INSTALLATION OF OPERATOR'S CAB ASSEMBLY
REMOVAL AND INSTALLATION OF OPERATOR'S CAB GLASS (STUCK GLASS)
REMOVAL AND INSTALLATION OF FRONT WINDOW ASSEMBLY
REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY
90 OTHERS
HYDRAULIC CIRCUIT DIAGRAM (PC750-7, PC750SE-7, PC800-7, PC800SE-7)
HYDRAULIC CIRCUIT DIAGRAM (LOADING SHOVEL SPECIFICATION, PC750-7, PC750SE-7)
ELECTRICAL CIRCUIT DIAGRAM (1/6) (PC750-7, PC750SE-7, PC800-7, PC800SE-7)
ELECTRICAL CIRCUIT DIAGRAM (2/6) (PC750-7, PC750SE-7, PC800-7, PC800SE-7)
ELECTRICAL CIRCUIT DIAGRAM (3/6) (PC750-7, PC750SE-7, PC800-7, PC800SE-7)
ELECTRICAL CIRCUIT DIAGRAM (4/6) (PC750-7, PC750SE-7, PC800-7, PC800SE-7)
ELECTRICAL CIRCUIT DIAGRAM (5/6) (PC750-7, PC750SE-7, PC800-7, PC800SE-7)
ELECTRICAL CIRCUIT DIAGRAM (6/6) (LOADING SHOVEL SPECIFICATION, PC750-7, PC750SE-7)
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Komatsu PC750-7, PC750SE-7, PC750LC-7, PC800-7, PC800SE-7 Excavator Shop Manual - SEBM031307.pdf