Komatsu Excavator PC228US-2, PC228USLC-1, and PC228USLC-2 Manual

Product Overview

This comprehensive manual is designed for the Komatsu Excavator models PC228US-2, PC228USLC-1, and PC228USLC-2. It provides detailed information on machine specifications, component functions, maintenance procedures, and troubleshooting techniques to ensure efficient and safe operation.

Key Features

• General Information: Covers machine dimensions, performance specifications, component weights, and fuel, coolant, and lubricant specification charts.
• Structure and Function: Offers insights into the structure and function of each component, serving as a vital reference for troubleshooting.
• Testing and Adjustments: Contains procedures for checks to be performed before and after repairs, adjustments post-checks, and troubleshooting charts linking problems to potential causes.
• Disassembly and Assembly: Step-by-step guides for removing, installing, disassembling, or assembling components, including safety precautions.

Benefits

• Enhances understanding of excavator components and operations.
• Provides reliable troubleshooting information to minimize downtime.
• Improves maintenance practices with detailed procedures.
• Boosts safety with recommended precautions for handling heavy components.

Usage Recommendations

• Always use lifting equipment with adequate capacity when moving heavy components.
• Check lifting gear such as wire ropes, chains, and hooks for any damage before use.
• Follow the recommended order during disassembly and assembly to prevent damage.
• Operate the lifting equipment slowly to avoid collisions within the machine’s components and environment.

Manual Extract – Disassembly of Brake Valve

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Removal of Spool:

• Remove plug (324) from the rear flange (301) and the O-ring (336) from the plug.
• Ensure the motor is on the turning worktable for ease of work.
• Never reuse the removed O-ring (336).
• Necessary tools include a socket wrench and a wrench adapter, socket size 41.
• Remove 2 springs (328), 2 stoppers (325), and the spool (323) from the rear flange (301), taking care not to damage the periphery of the spool or the sliding surface.
• Slant the rear flange with either plug port down to allow the spool to slide for easy removal.