Komatsu Excavator Service Manual

Product Overview

This comprehensive service manual for the Komatsu PC750-6, PC750LC-6, and PC800-6 Excavators offers detailed guidelines on the structure, function, testing, adjusting, disassembly, assembly, and maintenance of each component. Designed to deliver an in-depth understanding of the machinery, this manual is an essential tool for troubleshooting and upkeep.

Key Features

• Structure and Function Details: A thorough explanation of the structural components and their functions, aiding in troubleshooting.
• Testing and Adjustment Instructions: Step-by-step guides for performing pre-repair and post-repair checks, along with necessary adjustments.
• Disassembly and Assembly Procedures: Detailed order of operations and safety precautions for component removal and reinstallation.
• Maintenance Standards: Charts and specifications for fuel, coolant, and lubrication to ensure optimal performance.

Benefits

• Enhance understanding of excavator components and operations.
• Streamlined troubleshooting with comprehensive charts linking problems to causes.
• Effective maintenance planning with prescribed standards and specifications.

Usage Recommendations

• Measure engine oil pressure under operational coolant temperature.
• Execute disassembly and assembly following the sequence outlined to avoid errors.
• Regularly refer to troubleshooting charts when encountering operational issues.

Instructions to Measure Engine Oil Pressure:

1. Remove the oil low-pressure switch (1) or oil high-pressure switch (2). Secure the wiring harness with tape to avoid contact with the cylinder block.
2. Attach nipple q to oil pressure gauge C2, then connect to the oil pressure gauge.
3. Start the engine to measure oil pressure at low and high idling speeds.
4. Once measurement is complete, disconnect equipment and restore original settings.

The oil pressure switch torque specification is 2.9 – 5.9 Nm (0.3 – 0.6 kgm).