Komatsu D155A-6 Dozer Service Manual

Product Overview

The Komatsu D155A-6 Dozer Service Manual is an essential resource for service personnel, providing comprehensive guidelines on the maintenance, troubleshooting, and repair procedures for the Komatsu D155A-6 Dozer. This manual is crafted to be a professional guide, suitable for both beginners and experienced technicians.

Table of Contents

• 00 Index and Foreword: Introduction to the manual, including foreword and general information.
• 01 Specification: Detailed specification and technical data.
• 10 Structure, Function and Maintenance Standard:
  • Engine and Cooling System
  • Power Train
  • Undercarriage and Frame
  • Hydraulic System
  • Work Equipment
  • Cab and Attachments
  • Electrical System
• 20 Standard Value Table: Standard service value table.
• 30 Testing and Adjusting: Procedures for testing and making adjustments.
• 40 Troubleshooting: Identifying and resolving common issues.
• 50 Disassembly and Assembly: Step-by-step disassembly and assembly instructions.
• 60 Air Conditioner: Maintenance of the air conditioning system.
• 90 Diagrams and Drawings: Detailed diagrams and technical drawings.

General Instructions

This section consolidates the basic information and procedures that are common to “Disassembly and Assembly”, “Testing and Adjustments”, “Troubleshooting”, and “Removal and Installation”. It is crucial for the serviceman to master this section to enhance their practical knowledge and troubleshooting efficiency.

Detailed Sections

1. Structure and Function

This part provides a comprehensive explanation of the equipment’s structure with detailed drawings and circuit diagrams. It serves both as a practical guide for service personnel and a training textbook for new technicians.

2. Testing and Adjustments

Includes procedures for all necessary tests and adjustments, illustrated with photographs to show the correct use of measuring equipment and measurement locations, aiding in effective troubleshooting, checking, and adjustments.

3. Troubleshooting

A systematic listing of common problems with potential causes and solutions. While it is not exhaustive, the knowledge from “Structure and Function” and “Testing and Adjustments” can be applied to diagnose unlisted issues.

4. Manual Specifications for Dozer

This section specifies essential dimensions and tolerances needed for testing, adjustments, and repairs. It focuses on the most commonly worked-on machine parts, offering procedures for disassembly, assembly, and troubleshooting.

Hydraulic Motor Overview

The hydraulic motor described in this manual is a swash plate type axial piston motor that converts hydraulic pressure into rotational motion.

Principle of Operation

• The hydraulic pump directs oil through the valve plate into the cylinder block.
• Oil flows only on one side of the Y-Y line, creating pressure on the pistons.
• This pressure generates a force that is transferred to the thrust plate, divided into components resulting in torque.
• The generated torque causes the cylinder block to rotate, which is transferred to the output shaft.

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For more information, visit the Repair Manual website.