Komatsu Mini Excavator PC20MR-2 PC27MR-2 PC30MR-2 service & repair manual

Description Komatsu Mini Excavator PC20MR-2 PC27MR-2 PC30MR-2 service & repair manual

Komatsu Mini Excavator PC20MR-2, PC27MR-2, PC30MR-2 pdf workshop service manual

Serial numbers:
PC20MR-2 F00003 and up
PC27MR-2 F00103 and up
PC30MR-2 F00103 and up

Technical documentation, specifications, troubleshooting, maintenance, electrical diagrams, hydraulic schematics, testing, adjusting, assembly, disassembly, removal, installation instructions and other information

MANUAL CONTENT:
General
Specification dimension drawing
Working range drawing
Specifications
Weight table
Lubricants, fuel and coolant specifications

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
PTO
Cooling system
Power train
Swing circle
Track frame
Swing machinery
Idler cushion
Idler
Hydraulic components layout drawing
Hydraulic tank
Track roller
Carrier roller
Sprocket
Track shoe
Center swivel joint
Travel motor
Travel motor
Hydraulic cylinder
Solenoid valve
Hydraulic pump
CONTROL VALVE
Control valve
Clss
Operation for each function and valve
Swing motor
Swing motor
Ppc valve
Work equipment
Dimensions of each part of work equipment
Floor
Engine control
Electric control system
Component parts of system
Monitor system
Monitor panel
Sensors

TESTING AND ADJUSTING
Standard value table for engine related parts
Standard value table for chassis related parts
List of testing, adjusting, and troubleshooting tools
Measuring engine speed
Measurement of exhaust gas color
Adjusting valve clearance
Adjusting valve clearance
Measuring compression pressure
Measuring compression pressure
Measuring engine oil pressure
Testing and adjusting fuel injection timing
Testing and adjusting fuel injection timing
Bleeding air from fuel circuit
Testing and adjusting alternator belt tension
Testing and adjusting alternator belt tension
Adjusting fuel control lever linkage
Measurement of clearance in swing circle bearings
Testing wear of sprocket
Testing and adjusting track shoe tension
Testing and adjusting oil pressures in work equipment, travel, swing, and blade circuits
Measuring and adjusting oil pressures in work equipment, travel, boom swing, swing, and blade circuits
Measuring control circuit basic pressure
Testing and adjusting pump ls differential pressure
Measuring and adjusting ls differential pressure
Measuring solenoid valve output pressure
Measuring ppc valve output pressure
Adjusting play of work equipment and swing ppc valves
Measuring swing holding brake release pressure
Measuring swing holding brake release pressure
Testing and adjusting travel deviation
Measurement of oil leakage from cylinder
Releasing residual pressure from hydraulic circuit
Bleeding air from cylinder
Pressurizing hydraulic tank
Bleeding air from each part
How to open and close (tilt) floor
Inspection procedures for diode

Troubleshooting
Points to remember when troubleshooting
Sequence of events in troubleshooting
Points to remember when carrying out maintenance
Checks before troubleshooting
Classification and procedures of troubleshooting
Connectors list and stereogram
Classification and procedures of troubleshooting
Types and locations of connectors
Connector arrangement diagram
Connection table for connector pin numbers
T-adapter - boxes and t-adapter table
Troubleshooting of electrical system PC20MR-2 (Except monitor panel) (E mode)
Troubleshooting of electrical system PC27MR-2 PC30MR-2 (Except monitor panel) (E mode)
Troubleshooting of hydraulic and mechanical system (PC20MR-2) (H mode)
Troubleshooting of hydraulic and mechanical system (PC27MR-2 PC30MR-2) (H mode)
Troubleshooting of monitor panel system (PC20MR-2) (M mode)
Troubleshooting of monitor panel (PC27-30MR-2) system (M-mode)
TROUBLESHOOTING OF ENGINE (PC20MR-2) (S-MODE)
TROUBLESHOOTING OF ENGINE (PC27-30MR-2) (S-MODE)

Disassembly and assembly
How to read this manual
Precautions when performing operation
Special tool list
Removal and installation of fuel injection pump assembly
Removal and installation of fuel injection pump assembly
Removal and installation of radiator and hydraulic oil cooler assembly
Removal and installation of radiator and hydraulic oil cooler assembly
Removal and installation of engine and hydraulic pump assembly
Removal and installation of engine and hydraulic pump assembly
Removal and installation of track shoe assembly
Disassembly and assembly of idler assembly
Disassembly and assembly of recoil spring assembly
Disassembly and assembly of carrier roller assembly
Disassembly and assembly of track roller assembly
Removal and installation of center swivel joint assembly
Removal and installation of center swivel joint assembly
Disassembly and assembly of center swivel joint assembly
Removal and installation of floor frame assembly
Removal and installation of floor frame assembly
Removal and installation of swing motor and swing machinery 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 work equipment assembly
Removal and installation of revolving frame assembly
Removal and installation of revolving frame assembly
Removal and installation of swing circle assembly
Disassembly and assembly of control valve assembly
Disassembly and assembly of hydraulic cylinder assembly
Disassembly and assembly of hydraulic cylinder assembly
Removal and installation of air conditioner unit assembly
Removal and installation of front window assembly
Removal and installation of operator’s cab glass (stuck glass)

Hydraulic circuit diagram
Electrical circuit diagram

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