Komatsu Excavator PC1250-8R PC1250SP-8R service & repair manual

Description Komatsu Excavator PC1250-8R PC1250SP-8R service & repair manual

Komatsu Hydraulic Excavator PC1250-8R, PC1250SP-8R pdf workshop service repair manual + operation & maintenance manual

Serial numbers:
35001 and up
35406 and up

Specifications, testing, troubleshooting, maintenance, technical documentation, electrical diagrams, hydraulic schematics, adjusting, 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
Backhoe specification
Loading shovel specification
Weight table
Table of fuel, coolant and lubricants

Structure, function and maintenance standard
Engine and cooling system
PTO
PTO lubrication system
Radiator and oil cooler
Power train
Swing machinery
Swing circle
Final drive
Sprocket
Undercarriage and frame
Track frame, recoil spring
Idler
Carrier roller
Track roller
Track shoe
Hydraulic system
Hydraulic piping drawing
Hydraulic tank
Hydraulic pump
Line oil filter
Pilot oil filter
Return oil filter
Drain oil filter
Cooling fan pump
Cooling fan motor
Aftercooler fan motor
Control valve
Swing motor
Center swivel joint
Travel motor
PPC control relief valve
Accumulator
Valve control
PPC valve
Solenoid valve
Hydraulic cylinder
Work equipment
Dimensions of work equipment
Cab and its attachments
Air conditioner
Electrical system
Engine control
Electric control system
Monitor system
Sensor

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

Testing and adjusting
Tools for testing, adjusting, and troubleshooting
Sketch of special tool
Measuring engine speed
Measuring air supply pressure (Boost pressure)
Measuring exhaust temperature
Measuring exhaust color
Adjustment of valve clearance
Measurement of compression pressure
Measuring blow-by pressure
Measurement of engine oil pressure
Adjusting engine speed sensor
Handling fuel system parts
Releasing residual pressure in fuel system
Testing fuel pressure
Measurement of fuel return rate and fuel leakage
Bleeding air from fuel circuit
Testing fuel system for leakage
Procedure for checking alternator and replacing belt
Testing swing circle bearing clearance
Testing wear of sprocket
Testing and adjusting track shoe tension
Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit
Testing and adjusting control circuit oil pressure
Testing and adjusting piston pump control pressure
Testing servo piston stroke
Measuring PPC valve output pressure and testing swing PPC shuttle valve
Measuring solenoid valve output pressure
Adjusting work equipment, swing PPC valve
Testing travel deviation
Testing locations causing hydraulic drift of work equipment
Measuring oil leakage
Measurement of fan speed
Measurement of fan circuit oil pressure
Measuring fan pump EPC solenoid valve output pressure
Bleeding air
Releasing remaining pressure in hydraulic circuit
Testing procedures for diode
Special function of machine monitor
Handling controller voltage circuit
VHMS controller initial setting procedure
Precautions for replacing VHMS controller
Pm-clinic service

Troubleshooting
Failure code table and fuse locations
Failure code table
Fuse locations
General information on troubleshooting
Points to remember when troubleshooting
Sequence of events in troubleshooting
Checks before troubleshooting
Classification and troubleshooting steps
Information in troubleshooting table
Connection table for connector pin numbers
T- branch box and T- branch adapter table
Troubleshooting by failure code (Display of code)
Troubleshooting of electrical system (E-mode)
Troubleshooting of hydraulic and mechanical system (H-mode)
Troubleshooting of engine (S-mode)

Disassembly and assembly
General information on disassembly and assembly
How to read this manual
Coating materials list
Special tools list
Sketches of special tools
Engine and cooling system (SAA6D170E-5)
Removal and installation of engine, PTO and hydraulic pump assembly
Removal and installation of radiator and hydraulic oil cooler assembly
Removal of air aftercooler assembly
Removal and installation of fuel cooler and air conditioner condenser assembly
Removal and installation of fan motor assembly
Removal and installation of fuel tank assembly
Engine (SAA6D170E-5)
Removal and installation of fuel supply pump assembly
Removal and installation of cylinder head assembly
Removal and installation of fuel injector assembly
Removal and installation of engine front seal
Removal and installation of engine rear seal
Power train
Removal and installation of PTO assembly
Disassembly and assembly of PTO assembly
Removal and installation of swing machinery assembly
Removal and installation of swing motor and swing machinery assembly
Disassembly and assembly of swing machinery assembly
Disassembly and assembly of swing machinery assembly
Removal and installation of swing circle assembly
Disassembly and assembly of final drive assembly
Undercarriage and frame
Removal and installation of track shoe assembly
Disassembly and assembly of one link in field
Removal and installation of idler assembly
Disassembly and assembly of idler assembly
Disassembly and assembly of idler adjustment cylinder assembly
Removal and installation of recoil spring assembly
Disassembly and assembly of recoil spring assembly
Removal and installation of track roller assembly
Disassembly and assembly of track roller assembly
Removal and installation of carrier roller assembly
Disassembly and assembly of carrier roller assembly
Removal and installation of revolving frame assembly
Removal and installation of counterweight assembly
Hydraulic system
Removal and installation of hydraulic tank assembly
Removal and installation of hydraulic pump assembly
Removal and installation of main pump input shaft oil seal
Removal and installation of 5-spool control valve assembly (No. 1)
Removal and installation of 4-spool control valve assembly (No. 2)
Removal and installation of 4-spool control valve assembly (No. 3)
Disassembly and assembly of control valve assembly (No. 1)
Disassembly and assembly of control valve assembly (No. 2)
Disassembly and assembly of control valve assembly (No. 3)
Removal and installation of swing motor assembly
Removal and installation of center swivel joint assembly
Disassembly and assembly of center swivel joint assembly
Removal and installation of travel motor assembly
Disassembly and assembly of work equipment PPC valve assembly
Disassembly and assembly of travel PPC valve assembly
Disassembly and assembly of hydraulic cylinder assembly
Work equipment
Removal and installation of bucket cylinder assembly
Removal and installation of bottom dump cylinder assembly
Removal and installation of arm cylinder assembly
Removal and installation of boom cylinder assembly
Removal and installation of bucket assembly
Removal and installation of arm assembly
Removal and installation of boom assembly
Cab and its attachments
Removal and installation of operator cab assembly
Removal and installation of operator’s cab glass (Stuck glass)
Removal and installation of front window assembly
Remove and install work equipment control lever assembly
Electrical system
Removal and installation of air conditioner unit assembly
Removal and installation of monitor assembly
Removal and installation of pump controller assembly
Removal and installation of Orbcomm terminal assembly for VHMS
Removal and installation of VHMS controller assembly
Removal and installation of engine controller assembly

Diagrams and drawings
Hydraulic circuit diagrams
Electrical diagrams and drawings
Connector arrangement diagram

Engine SAA6D170E-5 workshop service manual