Komatsu PC300,PC400,LC,HD,-5 Mighty Hydraulic Excavator Service Repair Shop Manual - SEBM02070507

This Complete Service Repair Workshop Manual PDF Download for the PC300-5, PC300LC-5, PC300-5, PC300LC-5 Mighty, PC300HD-5, PC400-5, PC400LC-5, PC400-5, PC400LC-5 Mighty, PC400HD-5 Komatsu 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 PC300-5 - S/N: 20001 and up
Komatsu PC300-5 MIGHTY - S/N: 21401 and up
Komatsu PC300LC-5 - S/N: 20001 and up
Komatsu PC300LC-5 MIGHTY - S/N: 21401 and up
Komatsu PC300HD-5 - S/N: 21401 and up
Komatsu PC400-5 - S/N: 20001 and up
Komatsu PC400-5 MIGHTY - S/N: 20603 and up
Komatsu PC400LC-5 - S/N: 20001 and up
Komatsu PC400LC-5 MIGHTY - S/N: 20603 and up
Komatsu PC400HD-5 - S/N: 20603 and up

PC300, 300LC-5, PC300, 300LC-5 MIGHTY, PC300HD-5 mount the SA6D108-1 engine;
PC400, 400LC-5, PC400, 400LC-5 MIGHTY, PC400HD-5 mount the S6D125-1 engine.


TABLE OF CONTENTS :

10 STRUCTURE AND FUNCTION
20 TESTING AND ADJUSTING
30 DISASSEMBLY AND ASSEMBLY
40 MAINTENANCE STANDARD


MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Product Code : SEBM02070507
Total Pages : 713


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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COVER
CONTENTS

10 STRUCTURE AND FUNCTION
POWER TRAIN
FINAL DRIVE
SWING CIRCLE
SWING MACHINERY
TRACK FRAME AND RECOIL SPRING
IDLER
TRACK ROLLER, CARRIER ROLLER
TRACK SHOE
HYDRAULIC PIPING
HYDRAULIC CIRCUIT DIAGRAM
HYDRAULIC TANK
OLSS (OPEN CENTER LOAD SENSING SYSTEM)
HYDRAULIC PUMP
LINE OIL FILTER
CONTROL VALVE
SWING MOTOR
CENTER SWIVEL JOINT
TRAVEL MOTOR
VALVE CONTROL
PPC VALVE
ACCUMULATOR, SAFETY LOCK VALVE
SOLENOID VALVE ASSEMBLY
SHUTTLE VALVE
BOOM HOLDING VALVE
HYDRAULIC CYLINDER
ELECTRICAL WIRING DIAGRAM
ELECTRICAL CIRCUIT DIAGRAM
ENGINE CONTROL SYSTEM
PEMC SYSTEM
EMACC (ELECTRONIC MONITOR AND CONTROL CONSOLE)

20 TESTING AND ADJUSTING
TABLE OF JUDGEMENT STANDARD VALUE
STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM
TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
TESTING AND ADJUSTING FUEL INJECTION TIMING
TESTING AND ADJUSTING TRAVEL OF GOVERNOR MOTOR LEVER
ADJUSTING ENGINE SPEED SENSOR
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT
TESTING AND ADJUSTING CHARGING PUMP PRESSURE
TESTING AND ADJUSTING MAIN PUMP CONTROL PRESSURE
TESTING AND ADJUSTING TRAVEL DEVIATION
MEASURING STROKE OF SERVO PISTON
MEASURING OUTPUT PRESSURE OF PPC VALVE
ADJUSTING WORK EQUIPMENT, SWING PPC VALVE
TESTING PPC SHUTTLE VALVE
MEASURING SOLENOID VALVE OUTLET PORT PRESSURE
TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT
BLEEDING AIR
RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT
TROUBLESHOOTING
POINTS TO REMEMBER WHEN TROUBLESHOOTING
SEQUENCE OF EVENTS IN TROUBLESHOOTING
PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
HANDLING CONNECTORS
CHECKS BEFORE TROUBLESHOOTING
ELECTRICAL CIRCUIT DIAGRAM
POSITION OF CONNECTORS FOR TROUBLESHOOTING
CONNECTION TABLE FOR CONNECTOR
EXPLANATION OF FUNCTIONS OF CONTROL MECHANISM OF ELECTRICAL SYSTEM
DISPLAY METHOD FOR MONITOR PANEL, PUMP CONTROLLER AND ENGINE THROTTLE CONTROLLER
ACTION OF SELF-DIAGNOSTIC FUNCTION AND SYMPTOMS ON MACHINE
METHOD OF USING JUDGEMENT TABLE
METHOD OF USING TROUBLESHOOTING CHARTS
TROUBLESHOOTING OF ENGINE THROTTLE CONTROLLER SYSTEM (E MODE)
ENGINE THROTTLE CONTROLLER OR IN ENGINE RELATED PARTS
POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING ON ENGINE THROTTLE CONTROLLER SYSTEM
E-1 [ABNORMALITY IN POWER SOURCE SYSTEM OR CONTROLLER] IS DISPLAYED (ALL LAMPS OFF)
E-2 [SHORT CIRCUIT IN GOVERNOR MOTOR] IS DISPLAYED
E-3 [ABNORMALITY IN BATTERY RELAY] IS DISPLAYED
E-4 [DISCONNECTION IN WIRING HARNESS OF GOVERNOR MOTOR] IS DISPLAYED
E-5 [ABNORMALITY IN GOVERNOR POTENTIOMETER] IS DISPLAYED
E-6 [ABNORMALITY IN FUEL CONTROL DIAL] IS DISPLAYED
E-7 [ABNORMALITY IN NO.2 THROTTLE SIGNAL] IS DISPLAYED
E-8 ENGINE DOES NOT START
E-9 ENGINE ROTATION IS IRREGULAR
a) IDLING ROTATION IS IRREGULAR
b) THERE IS HUNTING
E-10 LACK OF OUTPUT POWER (MAX. ENGINE SPEED IS TOO LOW)
E-11 ENGINE DOES NOT STOP
E-12 AUTOMATIC WARMING-UP OPERATION IS DEFECTIVE
TROUBLESHOOTING OF PUMP CONTROLLER SYSTEM (C MODE)
CHART FOR DISTINGUISHING IF FAILURE IS IN PUMP CONTROLLER OR IN HYDRAULIC RELATED PARTS
C-1 [OFF] SELF-DIAGNOSTIC DISPLAY OF CONTROLLER DOES NOT LIGHT UP
C-2 [01] [SHORT CIRCUIT IN 2-STAGE RELIEF SOLENOID VALVE SYSTEM] IS DISPLAYED
C-3 [03] [SHORT CIRCUIT IN ARM HALF FLOW SOLENOID VALVE SYSTEM] IS DISPLAYED
C-4 [04] [SHORT CIRCUIT IN SWING BRAKE SOLENOID VALVE SYSTEM] IS DISPLAYED
C-5 [05] [SHORT CIRCUIT IN TRAVEL SPEED SOLENOID VALVE SYSTEM] IS DISPLAYED
C-6 [07] [SHORT CIRCUIT IN CO CANCEL SOLENOID VALVE SYSTEM] IS DISPLAYED
C-7 [08] [SHORT CIRCUIT IN TVC SOLENOID SYSTEM (1) ] IS DISPLAYED
C-8 [09] [SHORT CIRCUIT IN TVC SOLENOID VALVE SYSTEM (2) ] IS DISPLAYED
C-9 [11] [DISCONNECTION IN 2-STAGE RELIEF SOLENOID VALVE SYSTEM] IS DISPLAYED
C-10 [13] [DISCONNECTION IN ARM HALF FLOW SOLENOID VALVE SYSTEM] IS DISPLAYED
C-11 [14] [DISCONNECTION IN SWING BRAKE SOLENOID VALVE SYSTEM] IS DISPLAYED
C-12 [15] [DISCONNECTION IN TRAVEL SPEED SOLENOID VALVE SYSTEM] IS DISPLAYED
C-13 [17] [DISCONNECTION IN CO CANCEL SOLENOID VALVE SYSTEM] IS DISPLAYED
C-14 [18] [DISCONNECTION IN TVC SOLENOID VALVE SYSTEM] IS DISPLAYED
C-15 [21] [ABNORMALITY IN NO.2 THROTTLE SIGNAL SYSTEM] IS DISPLAYED
C-16 [22] [ABNORMALITY IN THROTTLE SIGNAL SYSTEM] IS DISPLAYED
C-17 [23] [ABNORMALITY IN FRONT PUMP PRESSURE SENSOR SIGNAL SYSTEM] IS DISPLAYED
C-18 [24] [ABNORMALITY IN REAR PUMP PRESSURE SENSOR SIGNAL SYSTEM] IS DISPLAYED
C-19 [25] [ABNORMALITY IN PRESSURE SENSOR POWER SOURCE SYSTEM] IS DISPLAYED
C-20 [26] [ABNORMALITY IN ENGINE SPEED SENSOR SYSTEM] IS DISPLAYED
C-21 [28] [ABNORMALITY IN AUTO-DECELERATION SIGNAL OUTPUT SYSTEM] IS DISPLAYED
C-22 [29] [ABNORMALITY IN OVERHEAT SIGNAL SYSTEM] IS DISPLAYED
C-23 [. ] [CONTROLLER ABNORMAL SYSTEM] IS DISPLAYED
TROUBLESHOOTING OF PUMP CONTROLLER INPUT SIGNAL SYSTEM (F MODE)
F-1 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [P2] [WORK EQUIPMENT・SWING OIL PRESSURE SWITCH]
F-2 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [P6] [TRAVEL OIL PRESSURE SWITCH]
F-3 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [B5] [SWING LOCK SWITCH]
F-4 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [HI OR LO] [TRAVEL SPEED SWITCH]
F-5 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [AD] [AUTO-DECELERATION SWITCH]
F-6 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [UP] [POWER MAXIMIZING SWITCH]
F-7 PUMP CONTROLLER MONITOR DOES NOT DISPLAY [ . ] [DECIMAL POINT OF [ENGINE SPEED SENSOR]
F-8 PUMP CONTROLLER WORKING MODE DISPLAY DOES NOT SWITCH
F-9 PUMP CONTROLLER POWER SET DISPLAY DOES NOT SWITCH
TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE)
H-1 SPEEDS OF WORK EQUIPMENT, TRAVEL, SWING ARE ALL SLOW
H-2 THERE IS EXCESSIVE DROP IN ENGINE SPEED, OR ENGINE STALLS
H-3 WORK EQUIPMENT, TRAVEL, SWING DO NOT MOVE, OR SPEED IS EXTREMELY SLOW
H-4 WORK EQUIPMENT, TRAVEL, SWING LACK POWER
H-5 POWER SET SELECTION SYSTEM DOES NOT SWITCH
H-6 ABNORMAL NOISE GENERATED (FROM AROUND PUMP)
H-7 AUTO-DECELERATION DOES NOT WORK
H-8 BOOM, ARM SPEED IS EXTREMELY SLOW
H-9 WORK EQUIPMENT (BOOM, ARM, BUCKET) SPEED IS SLOW
H-10 WHEN BOOM AND ARM ARE OPERATED SIMULTANEOUSLY, BOOM IS SLOW
H-11 WORK EQUIPMENT (BOOM, ARM, BUCKET) LACKS POWER
H-12 EXCESSIVE HYDRAULIC DRIFT
H-13 EXCESSIVE TIME LAG
H-14 DOES NOT ENTER F.O MODE
H-15 WHEN ARM AND SWING ARE OPERATED SIMULTANEOUSLY, ARM IS SLOW
H-16 WHEN MACHINE IS TRAVELING, IT DEVIATES TO ONE SIDE
H-17 EXCESSIVE DEVIATION DURING COMPOUND OPERATIONS
H-18 EXCESSIVE DEVIATION WHEN STARTING
H-19 TRAVEL LACKS POWER (OR SPEED IS SLOW)
H-20 TRAVEL SPEED DOES NOT SWITCH
H-21 MACHINE DOES NOT MOVE (ONE SIDE ONLY )
H-22 DOES NOT SWING
H-23 SWING SPEED IS SLOW OR ACCELERATION IS POOR
H-24 EXCESSIVE OVERRUN WHEN STOPPING SWING
H-25 EXCESSIVE SHOCK WHEN STOPPING SWING
H-26 EXCESSIVE ABNORMAL NOISE WHEN STOPPING SWING
H-27 EXCESSIVE HYDRAULIC DRIFT OF SWING
H-28 WHEN OPERATED SIMULTANEOUSLY WITH ARM, SWING SPEED IS SLOW
TABLE OF FAILURE MODES AND CAUSES
TROUBLESHOOTING OF MONITOR SYSTEM (P MODE)
P-1 MONITOR PANEL LAMPS DO NOT LIGHT UP FOR 3 SECONDS WHEN STARTING SWITCH IS TURNED ON
a) NO MONITOR PANEL LAMPS LIGHT UP
b) SOME MONITOR PANEL LAMPS DO NOT LIGHT UP
P-2 MONITOR PANEL LAMPS ALL LIGHT UP WHEN STARTING SWITCH IS TURNED ON, BUT DO NOT GO OUT
P-3 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CHECK ITEMS FLASH (LEVELS FOR CHECK ITEMS ARE AS SPECIFIED)
a) COOLANT LEVEL FLASHES
b) ENGINE OIL LEVEL FLASHES
c) HYDRAULIC OIL LEVEL FLASHES
P-4 PREHEATING IS NOT BEING USED, BUT PREHEATING DISPLAY LIGHTS UP
P-5 WHEN STARTING SWITCH IS TURNED ON AND ENGINE IS STARTED, CHECK ITEMS FLASH
a) ALTERNATOR SYSTEM
b) ENGINE OIL PRESSURE SYSTEM
P-6 WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), CAUTION ITEMS FLASH
P-7 WHEN STARTING SWITCH IS TURNED ON AND ENGINE IS STARTED, CAUTION ITEMS FLASH
a) ENGINE OIL PRESSURE FLASHES
b) COOLANT LEVEL FLASHES
c) COOLANT TEMPERATURE FLASHES
d) CHARGE FLASHES
e) FUEL LEVEL FLASHES
P-8
a) WHEN STARTING SWITCH IS TURNED ON (ENGINE STOPPED), BUZZER DOES NOT SOUND FOR 1 SECOND
CAUTION ITEM IS FLASHING BUT BUZZER DOES NOT SOUND
b) THERE IS NO ABNORMALITY DISPLAY ON THE MONITOR, BUT THE BUZZER SOUNDS
P-9 PANEL LIGHTING OF MONITOR PANEL DOES NOT LIGHT UP
P-10 COOLANT TEMPERATURE SHOWS ABNORMALLY LOW TEMPERATURE
P-11 COOLANT TEMPERATURE GAUGE GIVES NO DISPLAY
P-12 FUEL GAUGE ALWAYS DISPLAYS FULL
P-13 FUEL GAUGE GIVES NO DISPLAY
P-14
a) LAMPS DO NOT LIGHT UP
b) LAMPS LIGHT UP EVEN WHEN LAMP SWITCH IS NOT OPERATED
P-15
a) WIPERS DO NOT WORK
b) WIPERS WORK EVEN WHEN WIPER SWITCH IS NOT OPERATED
P-16
a) FAN DOES NOT WORK
b) FAN WORKS EVEN WHEN FAN SWITCH IS NOT OPERATED
P-17 WORKING MODE DOES NOT SWITCH
P-18 POWER SET DOES NOT SWITCH
P-19 AUTO-DECELERATION DOES NOT SWITCH (DOES NOT ENTER AUTO-DECELERATION; AUTO-DECELERATION IS NOT CANCELED)
P-20 TRAVEL SPEED DOES NOT SWITCH BETWEEN HI AND LO
P-21 WARMING-UP OPERATION IS NOT CARRIED OUT BELOW 30℃, OR WARMING-UP OPERATION IS NOT CANCELED EVEN WHEN TEMPERATURE GOES ABOVE 30℃
P-22 EVEN WHEN SWING LOCK SWITCH IS TURNED ON (LOCK), SWING LOCK LAMP ON MONITOR PANEL DOES NOT LIGHT UP
P-23 FUEL LEVEL SENSOR SYSTEM DEFECTIVE
P-24 COOLANT TEMPERATURE SENSOR SYSTEM DEFECTIVE
P-25 ENGINE OIL LEVEL SENSOR SYSTEM DEFECTIVE
P-26 COOLANT LEVEL SENSOR SYSTEM DEFECTIVE
P-27 HYDRAULIC OIL LEVEL SENSOR SYSTEM DEFECTIVE

30 DISASSEMBLY AND ASSEMBLY
METHOD OF USING MANUAL
PRECAUTIONS WHEN CARRYING OUT OPERATION
SPECIAL TOOL LIST
WEIGHT TABLE
TIGHTENING TORQUES AND STANDARD VALUES TABLE
STARTING MOTOR
REMOVAL AND INSTALLATION
ALTERNATOR
REMOVAL AND INSTALLATION
ENGINE OIL COOLER
REMOVAL AND INSTALLATION
FUEL INJECTION PUMP
REMOVAL AND INSTALLATION
WATER PUMP
REMOVAL AND INSTALLATION
NOZZLE HOLDER
REMOVAL AND INSTALLATION
TURBOCHARGER
REMOVAL AND INSTALLATION
THERMOSTAT
REMOVAL AND INSTALLATION
ENGINE FRONT OIL SEAL
REMOVAL AND INSTALLATION
ENGINE REAR OIL SEAL
REMOVAL AND INSTALLATION
GOVERNOR MOTOR
REMOVAL AND INSTALLATION
CYLINDER HEAD
REMOVAL AND INSTALLATION (PC300)
REMOVAL AND INSTALLATION (PC400)
AFTERCOOLER CORE
REMOVAL AND INSTALLATION (PC300)
HYDRAULIC COOLER
REMOVAL AND INSTALLATION
RADIATOR, HYDRAULIC OIL COOLER
REMOVAL AND INSTALLATION
ENGINE, HYDRAULIC PUMP
REMOVAL AND INSTALLATION (PC300)
REMOVAL (PC400)
INSTALLATION (PC400)
DAMPER
REMOVAL AND INSTALLATION
CENTER SWIVEL JOINT
REMOVAL AND INSTALLATION
DISASSEMBLY AND ASSEMBLY
FINAL DRIVE
REMOVAL AND INSTALLATION
DISASSEMBLY
ASSEMBLY
TRAVEL MOTOR
DISASSEMBLY
ASSEMBLY
SPROCKET
REMOVAL AND INSTALLATION
SWING MOTOR
REMOVAL AND INSTALLATION
DISASSEMBLY
ASSEMBLY
SWING MACHINERY
REMOVAL AND INSTALLATION
DISASSEMBLY
ASSEMBLY
REVOLVING FRAME
REMOVAL AND INSTALLATION
SWING CIRCLE
REMOVAL AND INSTALLATION
IDLER, RECOIL SPRING
REMOVAL AND INSTALLATION
RECOIL SPRING
DISASSEMBLY AND ASSEMBLY
TRACK ROLLER
REMOVAL AND INSTALLATION
CARRIER ROLLER
REMOVAL AND INSTALLATION
TRACK SHOE
REMOVAL AND INSTALLATION
CHARGING PUMP
REMOVAL AND INSTALLATION
HYDRAULIC PUMP
REMOVAL AND INSTALLATION
DISASSEMBLY
ASSEMBLY
HYDRAULIC PUMP INPUT SHAFT OIL SEAL
REMOVAL AND INSTALLATION
CONTROL VALVE
REMOVAL AND INSTALLATION
DISASSEMBLY
ASSEMBLY
MAIN RELIEF VALVE
REMOVAL AND INSTALLATION
DISASSEMBLY AND ASSEMBLY
TVC VALVE
REMOVAL AND INSTALLATION
CO-NC VALVE
REMOVAL AND INSTALLATION
SERVO VALVE
REMOVAL AND INSTALLATION
WORK EQUIPMENT PPC VALVE
REMOVAL AND INSTALLATION
DISASSEMBLY AND ASSEMBLY
TRAVEL PPC VALVE
REMOVAL AND INSTALLATION
DISASSEMBLY AND ASSEMBLY
BOOM HOLDING VALVE
REMOVAL AND INSTALLATION
DISASSEMBLY AND ASSEMBLY
PPC SHUTTLE VALVE
REMOVAL AND INSTALLATION
BOOM CYLINDER
REMOVAL AND INSTALLATION
ARM CYLINDER
REMOVAL AND INSTALLATION
BUCKET CYLINDER
REMOVAL AND INSTALLATION
BOTTOM DUMP CYLINDER
REMOVAL AND INSTALLATION
HYDRAULIC CYLINDER
DISASSEMBLY
ASSEMBLY
WORK EQUIPMENT
REMOVAL AND INSTALLATION
BUCKET
REMOVAL AND INSTALLATION
ARM
REMOVAL AND INSTALLATION
ARM, BUCKET
REMOVAL AND INSTALLATION
BOOM
REMOVAL AND INSTALLATION
OPERATOR'S CAB
REMOVAL AND INSTALLATION
COUNTERWEIGHT
REMOVAL AND INSTALLATION
ENGINE THROTTLE CONTROLLER
REMOVAL AND INSTALLATION
PUMP CONTROLLER
REMOVAL AND INSTALLATION
MONITOR PANEL
REMOVAL AND INSTALLATION
PROCEDURE FOR FLUSHING HYDRAULIC CIRCUIT
PC300
PC400

40 MAINTENANCE STANDARD
FINAL DRIVE
SWING MACHINERY
SWING CIRCLE
TRACK FRAME AND RECOIL SPRING
IDLER
TRACK ROLLER
CARRIER ROLLER
TRACK SHOE
HYDRAULIC PUMP
CHARGING PUMP AND RELIEF VALVE
CONTROL VALVE
TRAVEL SHUTTLE VALVE
SWING MOTOR
TRAVEL MOTOR
PPC VALVE
PPC SHUTTLE VALVE
BOOM HOLDING VALVE
HYDRAULIC CYLINDER
WORK EQUIPMENT

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