Komatsu PW140-7 Excavator Service Manual

Table of Contents

00 FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-1
01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
10 STRUCTURE, FUNCTION AND MAINTENANCE
STANDARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
20 TESTING AND ADJUSTING. . . . . . . . . . . . . . . . . . . . . . . . 20-1
20 TESTING AND ADJUSTING. . . . . . . . . . . . . . . . . . . . . . 20-101
20 TESTING AND ADJUSTING
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-201
20 TESTING AND ADJUSTING
Troubleshooting when failure code is indicated . . . . 20-301
20 TESTING AND ADJUSTING
Troubleshooting of electrical system (E-Mode) . . . . . 20-501
20 TESTING AND ADJUSTING
Troubleshooting of electrical system
(Error Checking of items without Monitor codes) . . . 20-601
20 TESTING AND ADJUSTING
Troubleshooting of hydraulic and mechanical system
(H-Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-701
30 DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . 30-1
90 OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1

This shop manual has been prepared as an aid to improve the quality of repairs by giving the operator an accurate
understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure
you understand the contents of this manual and use it to full effect at every opportunity.

This shop manual mainly contains the necessary technical information for operations performed in a service workshop.
The manual is divided into chapters on each main group of components; these chapters are further divided into the
following sections.

STRUCTURE AND FUNCTION
This 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.

TESTING AND ADJUSTING
This sections explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs.
Troubleshooting charts correlating Problems to Causes are also included in this section.

DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.

MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.