Komatsu Mini Excavator PC20MR-3 service & repair manual

Description Komatsu Mini Excavator PC20MR-3 service & repair manual

Komatsu Mini Excavator PC20MR-3 pdf workshop service manual

Serial number 20001 and up

Specifications, testing, adjusting, troubleshooting, technical data, electrical diagrams, hydraulic schematics, assembly, disassembly, removal, installation instructions and other information

MANUAL CONTENT:
Index and foreword
Foreword and general information
Safety notice
How to read the shop manual
Explanation of terms for maintenance standard
Handling of electric equipment and hydraulic component
Handling of connectors newly used for engines
How to read electric wire code
Precautions when carrying out operation
Method of disassembling and connecting push-pull type coupler
Standard tightening torque table
Conversion table

Specification
Specification and technical data
Specification dimension drawing
Working range drawing
Specifications
Weight table
Table of fuel, coolant and lubricants

Structure, function and maintenance standard
Engine and cooling system
PTO
Cooling system
Power train
Swing circle
Undercarriage and frame
Track frame
Idler cushion
Idler
Track roller
Sprocket
Track shoe
Hydraulic system
Hydraulic components layout drawing
Hydraulic tank and filter
Center swivel joint
Travel motor
Hydraulic cylinder
Solenoid valve
Hydraulic pump
Control valve
CLSS
Operation for each function and valve
Swing motor
PPC valve
Work equipment
Dimensions of each part of work equipment
Cab and its attachments
Floor
Electrical system
Engine control system
Electric control system
KOMTRAX system
Component parts of system
Monitor system
Sensors

Standard value table
Standard service value table
Standard value table for engine related parts
Standard value table for chassis related parts

Testing and adjusting
List of testing, adjusting, and troubleshooting tools
Measuring engine speed
Adjusting valve clearance
Measuring compression pressure
Measuring engine oil pressure
Testing and adjusting fuel injection timing
Bleeding air from fuel circuit
Testing and adjusting fan belt tension
Adjusting fuel control lever linkage
Measurement of clearance in swing circle bearings
Testing and adjusting track shoe tension
Testing and adjusting oil pressures in work equipment, travel, swing, and blade circuits
Measuring control circuit basic pressure
Testing and adjusting pump 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
Measurement of oil leakage from cylinder
Releasing residual pressure from hydraulic circuit
Bleeding air from cylinder
Pressurizing hydraulic tank
How to open and close (tilt) floor
Inspection procedures for diode
How to start operation of KOMTRAX terminal
Lamp display of KOMTRAX terminal
Preparation work for troubleshooting of electrical system

Troubleshooting
General information on troubleshooting
Points to remember when troubleshooting
Sequence of events in troubleshooting
Check before troubleshooting
Classification and troubleshooting steps
Probable problems and troubleshooting No
Connection table for connector pin numbers
T- branch box and T- branch adapter table
Troubleshooting of electrical system (E-mode)
Troubleshooting of hydraulic and mechanical system (H-mode)
Troubleshooting of engine (S-mode)
Troubleshooting of Machine monitor System(M-mode)

Disassembly and assembly
General information on disassembly and assembly
How to read this manual
Coating materials list
Special tool list
Engine and cooling system
Removal and installation of fuel injection pump assembly
Removal and installation of radiator and hydraulic oil cooler assembly
Removal and installation of engine and hydraulic pump assembly
Power train
Removal and installation of swing circle assembly
Undercarriage and frame
Removal and installation of track shoe assembly
Disassembly and assembly of idler assembly
Disassembly and assembly of recoil spring
Disassembly and assembly of track roller assembly
Removal and installation of floor frame assembly
Removal and installation of revolving frame assembly
Hydraulic system
Disassembly and assembly of control valve assembly
Removal and installation of center swivel joint assembly
Disassembly and assembly of center swivel joint assembly
Removal and installation of swing motor and swing machinery assembly
Disassembly and assembly of hydraulic cylinder assembly
Work equipment
Removal and installation of blade assembly
Removal and installation of work equipment assembly
Cab and its attachments
Removal and installation of front window assembly
Removal and installation of operator's cab glass (stuck glass)
Electric system
Removal and installation of KOMTRAX terminal

Diagrams and drawings
Hydraulic diagrams and drawings
Hydraulic circuit diagram
Electrical diagrams and drawings
Electrical circuit diagram
Connector list and stereogram

Engine 3D76E-6 workshop service manual