Komatsu PC490LCi-11 Hydraulic Excavator Shop Service Manual 86044 and up (SEN06944-03)

This Service Manual provides clear, step-by-step instructions for maintaining, diagnosing, and repairing Komatsu equipment. It includes detailed procedures, diagrams, specifications, and troubleshooting guides to help technicians perform accurate and efficient service work.

CONTENTS:

00 Index and Foreword
Index
Abbreviation List
Foreword, Safety, Basic Information
01 Specifications
Table of Contents
Specifications
10 Structure and Function
Table of Contents
Urea SCR System
Boot-up System
Engine System
Cooling System
Control System
Hydraulic System
Work Equipment System
ICT System
Swing System
Travel System
Undercarriage and Frame
Work Equipment
CAB Related Parts
20 Standard Value Table
Table of Contents
Standard Value Table for Engine
Standard Value Table for Machine
30 Testing and Adjusting
Table of Contents
Precautions Before Work
Related Information on Testing and Adjusting
Engine and Cooling System
Power Train
Undercarriage and Frame
Hydraulic System
Work Equipment
CAB Related Parts
Electrical System
ICT System
Pm Clinic
40 Troubleshooting
Table of Contents
Precautions Before Work
Related Information to Troubleshooting
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)
50 Disassembly and Assembly
Table of Contents
Precautions Before Work
Related Information on Disassembly and Assembly
Engine and Cooling System
Power Train
Undercarriage and Frame
Hydraulic System
Work Equipment
CAB Related Parts
Electrical System
60 Maintenance Standard
Table of Contents
Engine and Cooling System
Power Train
Undercarriage and Frame
Hydraulic System
Work Equipment
80 Appendix
Table of Contents
Precautions Before Work
Air Conditioner System
Component Parts of Air Conditioner System
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
Locations of Air Conditioner Parts and Layout of Connectors
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
Examine Fresh/Recirc Air Changeover
Examine Sunlight Sensor
Examine Refrigerant (Dual) Pressure Switch
Examine Relay
Air Conditioner Troubleshooting Chart 1
Air Conditioner Troubleshooting Chart 2
Information Shown in Troubleshooting Table
Failure Code [879AKA]
Failure Code [879AKB]
Failure Code [879BKA]
Failure Code [879BKB]
Failure Code [879CKA]
Failure Code [879CKB]
Failure Code [879DKZ]
Failure Code [879EMC]
Failure Code [879FMC]
Failure Code [879GKX]
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
Precautions for Disconnection and Connection of Air Conditioner Piping
Handle Compressor Oil
90 Circuit Diagrams
Table of Contents
Hydraulic Circuit Diagram
Electrical Circuit Diagram

Format: PDF (Printable Document)
File Language: English
File Pages: 4384
File Size: 119.86 MB
Brand: Komatsu
Model: PC490LCi-11 Hydraulic Excavator
Book No: SEN06944-03
Serial No: 86044 and up