Komatsu PC160LC-7E0, PC180LC-7E0, PC180NLC-7E0 Excavator Manual

Table of Contents

00 Index and foreword
01 Specification
10 Structure, function and maintenance standard
20 Standard value table
30 Testing and adjusting
40 Troubleshooting
50 Disassembly and assembly
90 Diagrams and drawings

1. Composition of shop manual

This shop manual contains the necessary technical information for services performed in a workshop. For
ease of understanding, the manual is divided into the following sections.

00. FOREWORD
This section explains the safety and basic information.

01. GENERAL
This section explains the specifications of the machine for the Excavator.

10. STRUCTURE AND FUNCTION, MAINTENANCE STANDARD
This section explains the structure, function, and maintenance standard values of each component.
The structure and function sub-section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting. The maintenance standard sub-section explains the criteria and remedies for disassembly and service.

20. TESTING AND ADJUSTING
Standard value table
This section explains the standard values for new machine and judgement criteria for testing, adjusting, and troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts in troubleshooting.

Testing and adjusting
This section explains measuring instruments and measuring methods for testing and adjusting, and method of adjusting each part. The standard values and judgement criteria for testing and adjusting are explained in Testing and adjusting.

Troubleshooting
This section explains how to find out failed parts and how to repair them. The troubleshooting is divided by failure modes. The S mode of the troubleshooting related to the engine may be also explained in the Chassis volume and Engine volume. In this case, see the Chassis volume.

30. DISASSEMBLY AND ASSEMBLY Excavator
This section explains the special tools and procedures for removing, installing, disassembling, and assembling each component, as well as precautions for them. In addition, tightening torque and quantity and weight of coating material, oil, grease, and coolant necessary for the work are also explain.

90. OTHERS (chassis volume)/Repair and replacement of parts (engine volume)
• Chassis volume
This section gives hydraulic circuit diagrams and electrical circuit diagrams.
• Engine volume
This section explains the method of reproducing, repairing, and replacing parts.

Releasing residual pressure from fuel system

– Pressure is generated in the low-pressure circuit and high-pressure circuit of the fuel system while the engine is running.
Low-pressure circuit:

• Feed pump Fuel main filter Supply pump High-pressure circuit: Supply pump Common rail InjectorThe pressure in both low-pressure circuit and high-pressure circuit lowers to a safety level automatically 30 seconds after the engine is stopped.
• Before the fuel circuit is checked and its parts are removed, the residual pressure in the fuel circuit must be released completely.
• Accordingly, observe the following: Before checking the fuel system or removing its parts, wait at least 30 seconds after stopping the engine until the residual pressure in the fuel circuit is released. (Do not start the work just after stopping the engine since there is residual pressure.)