Komatsu PC20-6, PC30-6, PC40-6 Hydraulic Excavator Service Repair Shop Manual - SEBM020R0604

This Complete Service Repair Workshop Manual PDF Download for the PC20-6, PC30-6, PC40-6 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 PC20-6 - S/N: 24001 and up
Komatsu PC30-6 - S/N: 10001 and up
Komatsu PC40-6 - S/N: 10001 and up


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 : SEBM020R0604
Total Pages : 345


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

10 STRUCTURE AND FUNCTION
POWER TRAIN
SWING CIRCLE
SWING MACHINERY
SPROCKET
TRACK FRAME AND RECOIL SPRING
IDLER
TRACK ROLLER
TRACK SHOE
HYDRAULIC PIPING
HYDRAULIC CIRCUIT SCHEMATICS
HYDRAULIC CIRCUIT DIAGRAM
HYDRAULIC TANK
HYDRAULIC TRIPLE GEAR PUMP
6-SPOOL CONTROL VALVE
2-SPOOL CONTROL VALVE
3-SPOOL CONTROL VALVE
CENTER SWIVEL JOINT
SWING MOTOR
TRAVEL MOTOR (WITH REDUCTION GEAR)
VALVE CONTROL
WORK EQUIPMENT
ELECTRICAL CIRCUIT DIAGRAM

20 TESTING AND ADJUSTING
TABLE OF JUDGEMENT STANDARD VALVE
TESTING AND ADJUSTING TOOL LIST
ADJUSTING VALVE CLEARANCE (PC20,30-6)
ADJUSTING VALVE CLEARANCE (PC40-6)
MEASURING COMPRESSION PRESSURE
TESTING AND ADJUSTING FUEL INJECTION TIMING (PC20,30-6)
TESTING AND ADJUSTING FUEL INJECTION TIMING (PC40-6)
BLEEDING AIR FROM HYDRAULIC CYLINDERS
MEASURING AND ADJUSTING HYDRAULIC PRESSURE
MEASURING HYDRAULIC PRESSURE OF ACCELERATION CIRCUIT (PC30,40-6)
MEASURING DISCHARGE AMOUNT OF PUMP
MEASURING OIL LEAKAGE FROM SWING, TRAVEL MOTORS
TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC20-6)
TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC30-6)
TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC40-6)
MEASURING LEAKAGE FROM HYDRAULIC CYLINDERS
TROUBLESHOOTING
PREPARATION OF TROUBLESHOOTING
HOW TO USE DIAGNOSTIC TABLE
PREVENTING RECURRENCE OF THE SAME TROUBLE
1.WORK EQUIPMENT, SWING, AND TRAVEL DO NOT MOVE, OR SPEED IS EXTREMELY SLOW
2.ARM IN (OUT) LACKS POWER (INCLUDING LACK OF SPEED)
3.BUCKET CURL (DUMP), BOOM RAISE (PUSHING UP CHASSIS), AND BOOM SWING LACK POWER (INCLUDING LACK OF SPEED)
4.ARM IN (OUT) OPERATION IS IMPOSSIBLE
5.BUCKET CURL (DUMP), BOOM RAISE (LOWER), BOOM SWING OPERATION IS IMPOSSIBLE
6.EXCESSIVE HYDRAULIC DRIFT OF WORK EQUIPMENT (BOOM, ARM, BUCKET, BLADE, BOOM SWING)
7.BLADE LACKS POWER (INCLUDING LACK OF SPEED)
8.BLADE OPERATION IS IMPOSSIBLE
9.LEFT (RIGHT) BOOM SWING LACKS POWER (INCLUDING LACK OF SPEED)
10.SWING OPERATION IS IMPOSSIBLE TO LEFT (OR RIGHT)
11.EXCESSIVE OVERRUN OF SWING ON SLOPES (HYDRAULIC DRIFT OF SWING)
12.EXCESSIVE OVERRUN WHEN SWING IS STOPPED
13.MACHINE NATURALLY DEVIATES TO ONE SIDE WHEN TRAVELING
14.MACHINE DOES NOT TRAVEL FORWARD (IN REVERSE)
15.TRAVEL SPEED DOES NOT CHANGE (PC30.40-6)

30 DISASSEMBLY AND ASSEMBLY
METHOD OF READING MANUAL
TABLE OF SPECIAL TOOLS
STARTING MOTOR
REMOVAL
INSTALLATION
ALTERNATOR
REMOVAL
INSTALLATION
WATER PUMP
REMOVAL
INSTALLATION
FUEL INJECTION PUMP
REMOVAL
INSTALLATION
NOZZLE HOLDER
REMOVAL
INSTALLATION
CYLINDER HEAD
REMOVAL (PC20.30-6)
INSTALLATION (PC20.30-6)
REMOVAL (PC40-6)
INSTALLATION (PC40-6)
HYDRAULIC OIL COOLER
REMOVAL
INSTALLATION
RADIATOR
REMOVAL
INSTALLATION
ENGINE
REMOVAL (PC20,30-6)
INSTALLATION (PC20,30-6)
REMOVAL (PC40-6)
INSTALLATION (PC40-6)
SWING CIRCLE
REMOVAL
INSTALLATION
SWING MACHINERY
REMOVAL
INSTALLATION
DISASSEMBLY (PC20.30-6)
ASSEMBLY (PC20.30-6)
DISASSEMBLY (PC40-6)
ASSEMBLY (PC40-6)
REVOLVING FRAME
REMOVAL
INSTALLATION
TRACK SHOE
REMOVAL
INSTALLATION
TRACK ROLLER
REMOVAL
INSTALLATION
IDLER, RECOIL SPRING
REMOVAL
INSTALLATION
RECOIL SPRING
DISASSEMBLY
ASSEMBLY
SPROCKET
REMOVAL
INSTALLATION
HYDRAULIC PUMP
REMOVAL
INSTALLATION
6-SPOOL CONTROL VALVE
REMOVAL
INSTALLATION
3-SPOOL CONTROL VALVE
REMOVAL
INSTALLATION
2-SPOOL CONTROL VALVE
REMOVAL
INSTALLATION
6-SPOOL CONTROL VALVE
DISASSEMBLY
ASSEMBLY
3-SPOOL CONTROL VALVE
DISASSEMBLY
ASSEMBLY
SWING MOTOR
REMOVAL
INSTALLATION
DISASSEMBLY
ASSEMBLY
CENTER SWIVEL JOINT
REMOVAL
INSTALLATION
DISASSEMBLY (PC20,30-6)
ASSEMBLY (PC20,30-6)
DISASSEMBLY (PC40-6)
ASSEMBLY (PC40-6)
TRAVEL MOTOR
REMOVAL
INSTALLATION
DISASSEMBLY (PC20-6)
ASSEMBLY (PC20-6)
DISASSEMBLY (PC30,40-6)
ASSEMBLY (PC30,40-6)
DISASSEMBLY (PC20-6)
ASSEMBLY (PC20-6)
DISASSEMBLY (PC30-6)
ASSEMBLY (PC30-6)
DISASSEMBLY (PC40-6)
ASSEMBLY (PC40-6)
BOOM CYLINDER
REMOVAL
INSTALLATION
ARM CYLINDER
REMOVAL
INSTALLATION
BUCKET CYLINDER
REMOVAL
INSTALLATION
BLADE CYLINDER
REMOVAL
INSTALLATION
BOOM SWING CYLINDER
REMOVAL
INSTALLATION
HYDRAULIC CYLINDER
DISASSEMBLY
ASSEMBLY
REPLACING HYDRAULIC CYLINDER PISTON RING
WORK EQUIPMENT
REMOVAL
INSTALLATION
BLADE
REMOVAL
INSTALLATION
BUCKET
REMOVAL
INSTALLATION
ARM
REMOVAL
INSTALLATION
ARM, BUCKET
REMOVAL
INSTALLATION
BOOM
REMOVL
INSTALLATION
FLOOR FRAME
REMOVAL
INSTALLATION

40 MAINTENANCE STANDARD
SWING CIRCLE
SWING MACHINERY
SPROCKET
TRACK FRAME AND RECOIL SPRING
IDLER
TRACK ROLLER
TRACK SHOE
TRIPLE GEAR PUMP
CENTER SWIVEL JOINT
SWING MOTOR
TRAVEL MOTOR BRAKE VALVE
6-SPOOL CONTROL VALVE
2-SPOOL CONTROL VALVE
3-SPOOL CONTROL VALVE
HYDRAULIC CYLINDER
WORK EQUIPMENT

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