Komatsu Excavator PC1250-11 PC1250LC-11 PC1250SP-11 workshop service manual

Description Komatsu Excavator PC1250-11 PC1250LC-11 PC1250SP-11 workshop service manual

Komatsu Hydraulic Excavator PC1250-11, PC1250LC-11, PC1250SP-11 pdf workshop service repair manual

Serial numbers:
50001 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
Abbreviation List
Foreword, Safety, Basic Information
How to Read the Shop Manual
Safety Notice for Operation
Precautions to Prevent Fire
Procedures If Fire Occurs
Precautions When You Discard Waste Materials
Precautions When You Handle Hydraulic Equipment
Precautions When You Disconnect and Connect Pipings
Precautions When You Handle Electrical Equipment
Precautions When You Handle Fuel System Equipment
Precautions When You Handle Intake System Equipment
Practical Use of KOMTRAX
Disconnect and Connect Push-Pull Type Coupler
Precautions for Disconnection and Connection of Connectors
How to Disconnect and Connect Deutsch Connector
How to Disconnect and Connect Slide Lock Type Connector
How to Disconnect and Connect Connector with Lock to Pull
How to Disconnect and Connect Connector with Lock to Push
How to Disconnect and Connect Connector with Housing to Rotate
How to Read the Codes for Electric Cable
Explanation of Terms for Maintenance Standard
Standard Tightening Torque Table
Conversion Table

Specifications
Specification Drawing
Working Range Drawings
Weight Table
Fuel, Coolant, Lubricants

Structure and Function
Boot-up System
Layout Drawing of Boot-up System
System Operating Lamp System
Battery Disconnect Switch
Engine System
Layout Drawing of Engine System
Engine Control System
Auto-Deceleration System
Automatic Low Idle System
Engine Automatic Warm-up System
Overheat Prevention System
Turbocharger Protection System
Automatic Idle Stop System
Component Parts of Engine System
Cooling System
Layout Drawing of Cooling System
Fan Speed Control System of Hydraulic Fan
Engine Output Control System of Hydraulic Fan
Fan Reverse Rotation System of Hydraulic Fan
Component Parts of Cooling System
Control System
Layout Drawing of Control System
Machine Monitor System
KomVision System
KOMTRAX Plus System
Component Parts of Control System
Hydraulic System
Layout Drawing of Hydraulic System
OLSS
Engine and Pump Combined Control System
Component Parts of Hydraulic System
Work Equipment System
Layout Drawing of Work Equipment System
Machine Push-up System
Heavy Lift System
Boom Shockless Control System
PPC Lock System
Work Equipment and Travel Automatic Lock System
Component Parts of Work Equipment System
Swing System
Layout Drawing of Swing System
Swing Control System Diagram
Swing Priority System Diagram
Swing Compensation System Diagram
Component Parts of Swing System
Travel System
Layout Drawing of Travel System
System Diagram of Travel Control System
Component Parts of Travel System
Pneumatic System
Layout Drawing of Pneumatic System
Pneumatic System Diagram
Component Parts of Pneumatic System
Lifting System
Hydraulically Operated Stairway System
Component Parts of Lifting System
Undercarriage and Frame
Layout Drawing of Undercarriage
Work Equipment
Structure of Work Equipment
Function of Work Equipment
Work Equipment Clearance Adjustment Shim
Bucket Clearance Adjustment Shim
CAB Related Parts
CAB
CAB Mount
CAB Tipping Stopper

Standard Value Table
Standard Value Table for Engine
Standard Value Table for Engine: PC1250-11
Standard Value Table for Engine: PC1250SP-11
Standard Value Table for Engine: PC1250LC-11
Standard Value Table for Machine
Standard Value Table for Machine: PC1250-11
Standard Value Table for Machine: PC1250SP-11
Standard Value Table for Machine: PC1250LC-11
Standard Value Table for Machine: PC1250-11 (Loading Shovel Specification)
Machine Posture and Procedures to Measure Performance
Machine Posture and Procedures to Measure Performance (Loading Shovel Specification)

Testing and Adjusting
Precautions Before Work
Related Information on Testing and Adjusting
Tools for Testing and Adjusting
Sketch of Tools for Testing and Adjusting
Engine and Cooling System
Examine Engine Speed
Examine Boost Pressure
Examine Exhaust Gas Temperature
Examine Exhaust Gas Color
Examine Mass Air Flow and Temperature Sensor
Examine and Adjust Valve Clearance
Examine Compression Pressure
Examine Blowby Pressure
Examine Engine Oil Pressure
Examine EGR Valve and VGT Oil Pressure
Examine Fuel Pressure
Examine Fuel Return Rate and Leakage
Bleed Air from Fuel System
Examine Fuel Circuit for Leakage
Examine Supply Pump
Handle Cylinder Cut-out Mode Operation
Examine Alternator
Handle No-Injection Cranking Operation
Clean Fuel Doser
Write Injector Compensation Value to Engine Controller
Write Correction for Ash in Soot Accumulation to Engine Controller
Power Train
Examine Swing Circle Bearing Clearance
Undercarriage and Frame
Examine Sprocket Wear
Examine and Adjust Track Tension
Hydraulic System
Release Remained Pressure in Hydraulic Circuit
Examine and Adjust Oil Pressure in Work Equipment, Swing, and Travel Circuits
Examine and Adjust Oil Pressure in Control Circuit
Examine and Adjust Piston Pump Control Oil Pressure
Examine Servo Piston Stroke
Examine Outlet Pressure of Solenoid Valve
Examine PPC Valve Outlet Pressure
Examine Swing PPC Shuttle Valve Outlet Pressure
Adjust Play of Work Equipment and Swing PPC Valves
Examine Travel Deviation
Examine Cooling Fan Speed
Examine Aftercooler Fan Speed
Examine Oil Pressure in Fan Pump Circuit
Examine Aftercooler Fan Pump Circuit Oil Pressure
Examine Fan Pump EPC Electric Current
Examine Fan Pump EPC Solenoid Valve Outlet Pressure
Examine Parts Which Cause Hydraulic Drift of Work Equipment
Examine Oil Leakage
Bleed Air from Hydraulic System
CAB Related Parts
Examine CAB Tipping Stopper
How to Adjust Mirrors
Electrical System
Set and Operate Machine Monitor
How to Start Up KOMTRAX Terminal
Default Setting of KOMTRAX Plus Controller
Default Setting of Wireless LAN Modem
Download Data from KOMTRAX Plus Controller
Adjust After Replacement of KOMTRAX Plus Controller
Adjust After Replacement of Wireless LAN Modem
Adjust KomVision Camera Angle
Adjust KomVision Related Function
Set Region of Bluetooth® Compatible Radio
Handle Voltage Circuit of Engine Controller
Handle Battery Disconnect Switch
Examine Diodes
Pm Clinic
Pm Clinic Service
Perform Quick Pm

Troubleshooting
Precautions Before Work
Related Information to Troubleshooting
General Troubleshooting Points
Troubleshooting Points for Aftertreatment System
Sequence of Events in Troubleshooting
Checks Before Troubleshooting
Inspection Procedure Before Troubleshooting
Test in Accordance with Testing Procedure
Preparation for Troubleshooting of Electrical System
Procedure for Troubleshooting
Symptom and Troubleshooting Numbers
Information Shown in Troubleshooting Table
How to Diagnose Open Circuit of Hydraulic Pressure Sensor System Wiring Harness
Connector List and Layout
Connector List and Layout (Loading Shovel Specification)
Connector Contact Connection Table
T-Branch Box and T-Branch Adapter Table
Fuse Location Table
Precautions When You Clean and Replace KDPF (KCSF and KDOC)
Prepare of Short Socket Adapter (For Failure Codes [CA1883], [CB1883], [CA3135] and [CB3135])
Failure Code Table
Troubleshooting by Failure Code (Display of Code)
Troubleshooting of Electrical System (E-Mode)
Troubleshooting for Hydraulic and Mechanical Systems (H Mode)
Troubleshooting of Engine (S-Mode)

Disassembly and Assembly
Precautions Before Work
Related Information on Disassembly and Assembly
How to Read This Manual
Coating Materials List
Special Tool List
Sketches of Special Tools
Engine and Cooling System
Remove and Install Supply Pump Assembly
Remove and Install Injector Assembly
Remove and Install Fuel Doser Assembly
Remove and Install Cylinder Head Assembly
Remove and Install EGR Valve Assembly
Remove and Install EGR Cooler Assembly
Remove and Install Starter Assembly
Remove and Install Alternator Belt
Remove and Install Radiator Assembly
Remove and Install Hydraulic Oil Cooler Assembly
Remove and Install Aftercooler Assembly
Remove and Install Cooling Fan Motor Assembly
Remove and Install Engine, PTO, and Hydraulic Pump Assembly
Remove and Install Engine Front Oil Seal
Remove and Install Engine Rear Oil Seal
Remove and Install Fuel Cooler Assembly
Remove and Install Engine Hood Assembly
Remove and Install Fuel Tank Assembly
Remove and Install KDPF Assembly
Disassemble and Assemble KDPF Assembly
Remove and Install Bellows Pipe Assembly
Remove and Install KCCV Assembly
Remove and Install Air Cleaner Assembly
Remove and Install Air Conditioner Compressor Assembly
Remove and Install Air Conditioner Condenser Assembly
Power Train
Disassemble and Assemble PTO Assembly
Remove and Install PTO Assembly
Remove and Install Travel Motor and Final Drive Assembly
Disassemble and Assemble Final Drive Assembly
Remove and Install Swing Motor and Swing Machinery Assembly
Disassemble and Assemble Swing Machinery Assembly
Remove and Install Swing Circle Assembly
Undercarriage and Frame
Remove and Install Idler Assembly
Disassemble and Assemble Recoil Spring Assembly
Remove and Install Track Roller Assembly
Remove and Install Carrier Roller Assembly
Disassemble and Assemble One Track Link Assembly in Field
Separate and Connect Track Assembly
Disassemble and Assemble Idler Assembly
Disassemble and Assemble Idler Adjustment Cylinder Assembly
Disassemble and Assemble Track Roller Assembly
Disassemble and Assemble Carrier Roller Assembly
Remove and Install Revolving Frame Assembly
Remove and Install Counterweight Assembly
Hydraulic System
Remove and Install Center Swivel Joint Assembly
Disassemble and Assemble Center Swivel Joint Assembly
Remove and Install Hydraulic Tank Assembly
Remove and Install Hydraulic Pump Assembly
Remove and Install Control Valve Assembly
Remove and Install Swing Motor Assembly
Disassemble and Assemble Work Equipment PPC Valve Assembly
Disassemble and Assemble Travel PPC Valve Assembly
Disassemble and Assemble Grease Gun Assembly
Work Equipment
Remove and Install Bucket Cylinder Assembly
Remove and Install Bucket Cylinder Assembly (Loading Shovel Specification)
Remove and Install Arm Cylinder Assembly
Remove and Install Arm Cylinder Assembly (Loading Shovel Specification)
Remove and Install Boom Cylinder Assembly
Remove and Install Boom Cylinder Assembly (Loading Shovel Specification)
Remove and Install Bucket Assembly
Remove and Install Bucket Assembly (Loading Shovel Specification)
Remove and Install Arm Assembly
Remove and Install Arm Assembly (Loading Shovel Specification)
Remove and Install Boom Assembly
Remove and Install Boom Assembly (Loading Shovel Specification)
Disassemble and Assemble Work Equipment Cylinder Assembly
Disassemble and Assemble Bottom Dump Cylinder Assembly (Loading Shovel Specification)
CAB Related Parts
Remove and Install Top Guard Assembly
Remove and Install Operator Cab Assembly
Remove and Install Operator Cab Glass (Adhered Glass)
Remove and Install Front Window Assembly
Remove and Install Floor Frame Assembly
Remove and Install Air Conditioner Unit Assembly
Remove and Install Operator Seat
How to Remove and Install Seat Belt
Remove and Install Work Equipment Control Lever Assembly
Remove and Install Front Wiper Assembly
Electrical System
Remove and Install Engine Controller Assembly
Remove and Install Pump Controller Assembly
Remove and Install KomVision Controller Assembly
Remove and Install Machine Monitor Assembly
Remove and Install Mass Air Flow and Temperature Sensor
Remove and Install KCCV Crankcase Pressure Sensor
Remove and Install KomVision Camera
Remove and Install KOMTRAX Terminal Assembly
Remove And Install KOMTRAX Plus Controller Assembly
Remove and Install Wireless LAN Unit Assembly

Maintenance Standard
Engine and Cooling System
Maintenance Standard for Engine Mount
Maintenance Standard for PTO
Maintenance Standard for Cooling System
Maintenance Standard for Cooling Fan Pump
Maintenance Standard for Cooling Fan Motor
Power Train
Maintenance Standard for Swing Circle
Maintenance Standard for Swing Machinery
Maintenance Standard for Final Drive
Maintenance Standard for Sprocket
Maintenance Standard for Sprocket Tooth Profile Full-Scale Drawing
Undercarriage and Frame
Maintenance Standard for Track Frame and Idler Cushion
Maintenance Standard for Idler
Maintenance Standard for Track Roller
Maintenance Standard for Carrier Roller
Maintenance Standard for Track Shoes
Maintenance Standard for Double Shoes
Hydraulic System
Maintenance Standard for Main Pump
Maintenance Standard for Swing Motor
Maintenance Standard for Control Valve
Maintenance Standard for Variable Back Pressure Valve
Maintenance Standard for Work Equipment and Swing PPC Valve
Maintenance Standard for Travel PPC Valve
Maintenance Standard for Solenoid Valve
Maintenance Standard for Center Swivel Joint
Work Equipment
Maintenance Standard for Work Equipment Linkage
Maintenance Standard for Work Equipment Linkage (Loading Shovel Specification)
Maintenance Standard for Boom Cylinder
Maintenance Standard for Boom Cylinder (Loading Shovel Specification)
Maintenance Standard for Arm Cylinder
Maintenance Standard for Arm Cylinder (Loading Shovel Specification)
Maintenance Standard for Bucket Cylinder
Maintenance Standard for Bucket Cylinder (Loading Shovel Specification)
Maintenance Standard for Bottom Dump Cylinder (Loading Shovel Specification)

Appendix
Precautions Before Work
Air Conditioner System
Precautions for Refrigerant
Air Conditioner Component
Specifications of Air Conditioner
Structure and Function of Refrigeration Cycle
Outline of Refrigeration Cycle
Component Parts of Air Conditioner System
Air Conditioner Unit
Component Parts of Air Conditioner Unit
Air Conditioner Controller
Compressor
Condenser
Receiver Drier
Air Conditioner Related Sensors
Explanation of Procedure for Test of and Troubleshooting of Air Conditioner
Circuit Diagram and Configuration of Connector Pins of Air Conditioner
System Diagram of Air Conditioner
Input and Output Signals of Air Conditioner Controller
Locations of Air Conditioner Parts and Layout of Connectors
Examine Air Leakage (Duct)
How to Examine Air Leakage (Duct)
Examine Air Conditioner with Self-Diagnosis Function
Open the Electrical System Abnormality Record Screen in Service Mode of Machine Monitor
Examine Vent (Mode) Changeover
How to Examine Vent (Mode) Changeover
Examine Fresh/Recirc Air Changeover
How to Examine Fresh/Recirc Air Changeover
Examine Sunlight Sensor
How to Examine Sunlight Sensor
Examine Refrigerant (Dual) Pressure Switch
How to Examine Refrigerant (Dual) Pressure Switch
Examine Relay
How to Examine Relay
Air Conditioner Troubleshooting Chart
Information Shown in Troubleshooting Table
A-1 Troubleshooting for Power Supply System (Air Conditioner Does Not Operate)
A-2 Troubleshooting for Compressor and Refrigerant System (Air is Not Cooled)
A-3 Troubleshooting for Blower Motor System (No Air Comes Out or Air Flow is Abnormal)
A-4 Troubleshooting for Fresh/Recirc Air Changeover
Troubleshooting by Gauge Pressure
Connect Service Tool
How to Connect Service Tool
Precautions for Disconnection and Connection of Air Conditioner Piping
Handle Compressor Oil

Circuit Diagrams
Hydraulic Circuit Diagram
Symbols Used in Hydraulic Circuit Diagram
Hydraulic Circuit Diagram (Loading Shovel Specification)
Electrical Circuit Diagram
Symbols Used in Electric Circuit Diagram

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