Komatsu PC400-7, PC400LC-7 Hydraulic Excavator Shop Manual (50001 and up) – SEBM037600

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Komatsu PC400-7, PC400LC-7 Hydraulic Excavator Service Repair Workshop Manual (50001 and up) – SEBM037600

This Complete Service Repair Workshop Manual PDF Download for the Komatsu PC400-7, PC400LC-7 Hydraulic Excavator (S/N: 50001 and up) 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 PC400-7 – S/N: 50001 and up
Komatsu PC400LC-7 – S/N: 50001 and up

PC400, 400LC-7 mount the SAA6D125E-3 engine.
For details of the engine, see the 125-3 Series Engine Shop Manual.

TABLE OF CONTENTS :

– GENERAL
– STRUCTURE, FUNCTION
– MAINTENANCE STANDARD
– TESTING, ADJUSTING
– DISASSEMBLY AND ASSEMBLY
– OTHER

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Product Code : SEBM037600
Total Pages : 735

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.

CONTENTS

01 GENERAL
SPECIFICATION DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
FUEL, COOLANT AND LUBRICANTS

10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
ENGINE RELATED PARTS
RADIATOR・OIL COOLER・AFTERCOOLER
POWER TRAIN
FINAL DRIVE
SPROCKET
SWING MACHINERY
SWING CIRCLE
TRACK FRAME AND RECOIL SPRING
IDLER
CARRIER ROLLER
TRACK ROLLER
TRACK SHOE
HYDRAULIC PIPING DRAWING
HYDRAULIC TANK
HYDRAULIC PUMP
LS(PC)-EPC VALVE
VARIABLE VOLUME VALVE
CONTROL VALVE
MAIN RELIEF VALVE
CLSS
SELF PRESSURE REDUCING VALVE
SWING MOTOR
REVERSAL PREVENTION VALVE
CENTER SWIVEL JOINT
TRAVEL MOTOR
TRAVEL JUNCTION VALVE
VALVE CONTROL
TRAVEL PPC SHUTTLE VALVE
WORK EQUIPMENT・SWING PPC VALVE
TRAVEL PPC VALVE
SERVICE PPC VALVE
SOLENOID VALVE
PPC ACCUMULATOR
RETURN OIL FILTER
BOOM HYDRAULIC DRIFT PREVENTION VALVE
ARM HYDRAULIC DRIFT PREVENTION VALVE
QUICK RETURN VALVE
LIFT CHECK VALVE
ATTACHMENT CIRCUIT SELECTOR VALVE
HOLDING VALVE
HYDRAULIC CYLINDER
WORK EQUIPMENT
COMBUSTION HEATER AND PARTS RELATED TO HEATER
ENGINE CONTROL
ELECTRONIC CONTROL SYSTEM
MONITOR SYSTEM (MULTI MONITOR SPECIFICATION)
7-SEGMENT MONITOR SYSTEM
SENSOR

20 TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
TESTING AND ADJUSTING
TESTING, ADJUSTING, AND TROUBLESHOOTING TOOLS TABLE
MEASURING ENGINE SPEED
MEASURING INTAKE AIR PRESSURE (BOOST PRESSURE)
MEASURING EXHAUST TEMPERATURE
MEASURING EXHAUST GAS COLOR
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
MEASURING BLOW-BY PRESSURE
MEASURING ENGINE OIL PRESSURE
HANDLING OF FUEL SYSTEM DEVICES
RELEASING RESIDUAL PRESSURE FROM FUEL SYSTEM
MEASURING FUEL PRESSURE
BLEEDING AIR FROM FUEL CIRCUIT
INSPECTION OF FUEL CIRCUIT FOR LEAKAGE
ADJUSTING ENGINE SPEED SENSOR
TESTING AND ADJUSTING FAN BELT AND ALTERNATOR BELT TENSION
MEASURING CLEARANCE OF SWING CIRCLE BEARING
TESTING AND ADJUSTING TRACK SHOE TENSION
TESTING AND ADJUSTING OIL PRESSURE IN WORK EQUIPMENT, SWING, AND TRAVEL CIRCUITS
MEASURING BASIC PRESSURE IN CONTROL CIRCUIT
TESTING AND ADJUSTING OIL PRESSURE IN PUMP PC CONTROL CIRCUIT
TESTING AND ADJUSTING OIL PRESSURE IN PUMP LS CONTROL CIRCUIT
MEASURING SOLENOID VALVE OUTPUT PRESSURE
MEASURING PPC VALVE OUTPUT PRESSURE
ADJUSTING PLAY OF WORK EQUIPMENT AND SWING PPC VALVES
TESTING PARTS WHICH CAUSE HYDRAULIC DRIFT OF WORK EQUIPMENT
RELEASING RESIDUAL PRESSURE IN HYDRAULIC CIRCUIT
MEASURING OIL LEAKAGE
BLEEDING AIR FROM EACH PART
TESTING PROCEDURE OF DIODE
SPECIAL FUNCTIONS OF MONITOR PANEL (MULTI MONITOR SPECIFICATION)
HANDLING OF HIGH-VOLTAGE CIRCUIT OF ENGINE CONTROLLER
PREPARATION WORK FOR TROUBLESHOOTING FOR ELECTRICAL EQUIPMENT SYSTEM (STANDARD SPECIFICATION)
PM-CLINIC SERVICE
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 ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH 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
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE
ERROR CODE IN ELECTRICAL SYSTEM [E112] (SHORT-CIRCUITING IN NORMAL ROTATION SYSTEM OF WINDSHIELD WIPER MOTOR DRIVE)
ERROR CODE IN ELECTRICAL SYSTEM [E113] (SHORT-CIRCUITING IN REVERSE ROTATION SYSTEM OF WINDSHIELD WIPER MOTOR DRIVE)
ERROR CODE IN ELECTRICAL SYSTEM [E114] (SHORT-CIRCUITING IN WINDOW WASHER DRIVE SYSTEM)
ERROR CODE IN ELECTRICAL SYSTEM [E115] (ABNORMAL WINDSHIELD WIPER MOTION)
ERROR CODE IN ELECTRICAL SYSTEM [E116] (ABNORMALITY IN RETRACTING WINDSHIELD WIPER)
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] (SHORT-CIRCUITING IN TRAVEL INTERLOCKING SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E203] (SHORT-CIRCUITING IN SWING HOLDING BRAKE SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E204] (SHORT-CIRCUITING IN MERGE/DIVIDE SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E205] (SHORT-CIRCUITING IN 2-STAGE RELIEF SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E206] (SHORT-CIRCUITING IN TRAVEL SPEED SHIFTING SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E211] (DISCONNECTION IN TRAVEL INTERLOCKING SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E213] (DISCONNECTION IN SWING HOLDING BRAKE SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E214] (DISCONNECTION IN MERGE/DIVIDE SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E215] (DISCONNECTION IN 2-STAGE RELIEF SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E216] (DISCONNECTION IN TRAVEL SPEED SHIFTING SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E217] (ABNORMAL INPUT MODEL CODE)
ERROR CODE IN ELECTRICAL SYSTEM [E218] (S-NET COMM. DISC.)
ERROR CODE IN ELECTRICAL SYSTEM [E222] (SHORT-CIRCUITING IN LS-EPC SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E223] (DISCONNECTION IN LS-EPC SOLENOID SYSTEM)
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] (ABNORMALITY IN ENGINE ROTATION SENSOR)
ERROR CODE IN ELECTRICAL SYSTEM [E228] (SHORT-CIRCUITING IN ATTACHMENT RETURN SWITCHING RELAY)
ERROR CODE IN ELECTRICAL SYSTEM [E232] (SHORT-CIRCUITING IN PC-EPC SOLENOID)
ERROR CODE IN ELECTRICAL SYSTEM [E233] (DISCONNECTION IN PC-EPC SOLENOID SYSTEM)
ERROR CODE IN ELECTRICAL SYSTEM [E238] (DISCONNECTION IN ATTACHMENT RETURN SWITCHING RELAY)
ERROR CODE IN ELECTRICAL SYSTEM [E245] (SHORT-CIRCUITING IN ATTACHMENT OIL FLOW RATE ADJUSTING EPC)
ERROR CODE IN ELECTRICAL SYSTEM [E246] (DISCONNECTION IN ATTACHMENT OIL FLOW RATE ADJUSTING EPC)
ERROR CODE IN ELECTRICAL SYSTEM [E247] (ARM IN PPC PRESSURE SENSOR ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM [E248] (BUCKET CURL PPC PRESSURE SENSOR ABNORMALITY)
ERROR CODE IN ELECTRICAL SYSTEM [E257] (PUMP ABNORMALITY)
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)
ERROR CODE IN MECHANICAL SYSTEM [A000N1] (ENGINE HIGH-IDLING SPEED OUT OF STANDARD)
ERROR CODE IN MECHANICAL SYSTEM [A000N2] (ENGINE LOW-IDLING SPEED OUT OF STANDARD)
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. WATER OVERHEAT)
FAILURE CODE IN MECHANICAL SYSTEM [[email protected]] (ENG. WATER LVL LOW)
FAILURE CODE IN MECHANICAL SYSTEM [[email protected]] (HYDR. OIL OVERHEAT)
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE
E-1 ENGINE DOES NOT START (THE 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 ONE-TOUCH POWER MAX, FUNCTION DOES NOT OPERATE
E-7 MACHINE PUSH-UP FUNCTION DOES NOT OPERATE NORMALLY
E-8 ATTACHMENT CIRCUIT DOES NOT CHANGE
E-9 NO DISPLAY IN MONITOR PANEL AT ALL
E-10 PART OF DISPLAY ON MONITOR PANEL IS MISSING
E-11 MONITOR PANEL DISPLAYS CONTENTS IRRELEVANT TO THE MODEL
E-12 FUEL LEVEL MONITOR RED LAMP LIGHTS UP WHILE ENGINE IS RUNNING
E-13 ENGINE WATER TEMPERATURE GAUGE DOES NOT DISPLAY CORRECTLY
E-14 HYDRAULIC OIL TEMPERATURE GAUGE DOES NOT DISPLAY CORRECTLY
E-15 FUEL GAUGE DOES NOT DISPLAY CORRECTLY
E-16 SWING LOCK MONITOR DOES NOT DISPLAY CORRECTLY
E-17 WHEN MONITOR SWITCH IS OPERATED, NOTHING IS DISPLAYED
E-18 WINDSHIELD WIPER AND WINDOW WASHER DO NOT WORK
E-19 ALARM BUZZER CANNOT BE CANCELLED
E-20 “BOOM RAISE” IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-21 “BOOM LOWER” IS NOT CORRECTLY DISPLAYED IN MONITOR FUNCTION
E-22 “ARM IN” IS NOT DISPLAYED NORMALLY IN MONITORING FUNCTION
E-23 “ARM DUMPING” IS NOT CORRECTLY DISPLAYED IN MONITORING FUNCTION
E-24 “BUCKET CURL” IS NOT DISPLAYED NORMALLY IN MONITORING FUNCTION
E-25 “BUCKET DUMPING” IS NOT CORRECTLY DISPLAYED IN MONITORING FUNCTION
E-26 “SWING” IS NOT DISPLAYED NORMALLY IN MONITORING FUNCTION
E-27 “TRAVEL” IS NOT CORRECTLY DISPLAYED IN MONITORING FUNCTION
E-28 “TRAVEL DIFFERENTIAL PRESSURE” IS NOT CORRECTLY DISPLAYED IN MONITORING FUNCTION
E-29 “SERVICE” IS NOT CORRECTLY DISPLAYED IN MONITORING FUNCTION
E-30 TRAVEL ALARM DOES NOT SOUND OR DOES NOT STOP SOUNDING
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE)
SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEM
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE
H-1 ALL WORK EQUIPMENT LACK POWER, OR TRAVEL AND SWING SPEEDS ARE LOW
H-2 ENGINE SPEED SHARPLY DROPS OR ENGINE STALLS
H-3 NO WORK EQUIPMENT, TRAVEL OR SWING MOVE
H-4 ABNORMAL NOISE IS HEARD FROM AROUND HYDRAULIC PUMP
H-5 AUTO-DECELERATOR DOES NOT WORK
H-6 FINE CONTROL MODE DOES NOT FUNCTION
H-7 BOOM MOVES SLOWLY OR LACKS POWER
H-8 ARM MOVES SLOWLY OR LACKS POWER
H-9 BUCKET MOVES SLOWLY OR LACKS POWER
H-10 WORK EQUIPMENT DOES NOT MOVE IN ITS SINGLE OPERATION
H-11 WORK EQUIPMENT HAS A BIT TOO FAST HYDRAULIC DRIFT
H-12 WORK EQUIPMENT HAS BIG TIME LAG
H-13 OTHER WORK EQUIPMENT MOVES WHEN RELIEVING SINGLE CIRCUIT
H-14 ONE-TOUCH POWER MAX. FUNCTION DOES NOT WORK
H-15 MACHINE PUSH-UP FUNCTION DOES NOT WORK
H-16 IN COMPOUND OPERATION, WORK EQUIPMENT WITH LARGER LOAD MOVES SLOWLY
H-17 IN SWING + BOOM RAISE OPERATION, BOOM MOVES SLOWLY
H-18 IN SWING + TRAVEL, TRAVEL SPEED DROPS SHARPLY
H-19 MACHINE SWERVES IN TRAVEL
H-20 MACHINE TRAVELS SLOWLY
H-21 MACHINE CANNOT BE EASILY STEERED OR LACKS POWER
H-22 TRAVEL SPEED DOES NOT SHIFT, OR IT IS SLOWER OR FASTER THAN PRESET SPEED.
H-23 TRACK SHOE DOES NOT TURN (ON ONE SIDE ONLY)
H-24 MACHINE DOES NOT SWING
H-25 SWING ACCELERATION IS POOR, OR SWING SPEED IS SLOW
H-26 EXCESSIVE OVERRUN WHEN STOPPING SWING
H-27 THERE IS BIG SHOCK WHEN STOPPING SWING
H-28 THERE IS BIG ABNORMAL NOISE CAUSED WHEN STOPPING SWING
H-29 SWING NATURAL DRIFT IS TOO BIG
H-30 ATTACHMENT CIRCUIT DOES NOT CHANGE
H-31 FLOW RATE IN ATTACHMENT CIRCUIT CANNOT BE ADJUSTED
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 WATER (OR WATER SPURTS BACK, OR WATER LEVEL GOES DOWN)
S-12 OIL PRESSURE CAUTION LAMP LIGHTS UP (DROP IN OIL PRESSURE)
S-13 OIL LEVEL RISES (WATER, FUEL IN OIL)
S-14 WATER TEMPERATURE BECOMES TOO HIGH (OVERHEATING)
S-15 ABNORMAL NOISE IS MADE
S-16 VIBRATION IS EXCESSIVE

30 DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
PRECAUTIONS WHEN PERFORMING OPERATION
SPECIAL TOOL LIST
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE REAR SEAL
REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL
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 STARTING MOTOR ASSEMBLY
REMOVAL AND INSTALLATION OF RADIATOR ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE AND HYDRAULIC PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY
REMOVAL AND INSTALLATION OF SWING MOTOR AND SWING MACHINERY ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF SWING MOTOR AND SWING MACHINERY ASSEMBLY
REMOVAL AND INSTALLATION OF SPROCKET
REMOVAL AND INSTALLATION OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY
EXPANSION AND INSTALLATION OF TRACK SHOE ASSEMBLY
REMOVAL AND INSTALLATION OF OPERATOR’S CAB (STANDARD SPECIFICATION)
REMOVAL AND INSTALLATION OF PUMP CONTROLLER (STANDARD SPECIFICATION)
REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY
REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT
REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF OF CENTER SWIVEL JOINT ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VELVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY
REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY
REMOVAL AND INSTALLATION OF OPERATOR’S CAB GLASS (STUCK GLASS)
REMOVAL AND INSTALLATION OF FRONT WINDOW ASSEMBLY

90 OTHERS
HYDRAULIC CIRCUIT DIAGRAM (1/2)
HYDRAULIC CIRCUIT DIAGRAM (2/2)
ELECTRICAL CIRCUIT DIAGRAM (1/5) (EXTREME COLD SPEC.)
ELECTRICAL CIRCUIT DIAGRAM (2/5) (EXTREME COLD SPEC.)
ELECTRICAL CIRCUIT DIAGRAM (3/5) (EXTREME COLD SPEC.)
ELECTRICAL CIRCUIT DIAGRAM (4/5) (EXTREME COLD SPEC.)
ELECTRICAL CIRCUIT DIAGRAM (5/5) (EXTREME COLD SPEC.)

 

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Komatsu PC400-7, PC400LC-7 Hydraulic Excavator Shop Manual (50001 and up) – SEBM037600.pdf

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