Download Komatsu D51EX-22, D51PX-22 Crawler Tractor Complete Workshop Service Repair Manual

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6 Replies to “Download Komatsu D51EX-22, D51PX-22 Crawler Tractor Complete Workshop Service Repair Manual”

  1. Keep the screw in a flat table or tyre set to start only to see whether the unions are finally flat .

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  5. Replacing the Exhaust Gas Recirculation (EGR) valve on a Komatsu D51EX-22 or D51PX-22 Crawler Tractor involves several key components and steps. Here’s a general outline of the main components and procedures involved in this process:

    ### Main Components:

    1. **EGR Valve**: The primary component being replaced. It controls the flow of exhaust gases back into the engine’s intake to reduce emissions.

    2. **Gaskets**: New gaskets are necessary to ensure a proper seal between the EGR valve and the engine to prevent leaks.

    3. **Bolts and Fasteners**: These may need to be replaced if they are damaged or corroded. Ensure you have the correct size and type for reinstallation.

    4. **EGR Cooler (if applicable)**: Some setups may include an EGR cooler that may need to be disconnected during the valve replacement.

    5. **Hoses and Clamps**: Inspect hoses and clamps connected to the EGR system for wear and replace if necessary.

    ### Steps for EGR Valve Replacement:

    1. **Preparation**:
    – Gather the necessary tools (socket set, wrenches, screwdrivers, etc.).
    – Ensure the engine is cool and the tractor is on a flat surface.

    2. **Disconnect the Battery**: To ensure safety, disconnect the negative battery terminal to prevent electrical shorts.

    3. **Remove Components**: Depending on the specific layout, you may need to remove various components or covers to access the EGR valve (such as the intake manifold or exhaust components).

    4. **Disconnect the EGR Valve**:
    – Remove vacuum lines or electrical connectors attached to the EGR valve.
    – Loosen and remove the bolts securing the valve to the engine.

    5. **Inspect and Clean**: Before installing the new valve, inspect the mounting surface for any debris or old gasket material. Clean the area to ensure a good seal.

    6. **Install the New EGR Valve**:
    – Place a new gasket on the mounting surface.
    – Position the new EGR valve and secure it with bolts, tightening them to the manufacturer’s specified torque settings.

    7. **Reassemble Components**: Reattach any components or hoses that were removed to access the EGR valve.

    8. **Reconnect the Battery**: Reconnect the negative battery terminal.

    9. **Test the System**: Start the engine and check for any leaks around the EGR valve or related components. Monitor the engine performance to ensure everything is functioning correctly.

    10. **Diagnostic Check (if necessary)**: If your tractor is equipped with diagnostic capabilities, perform a check to ensure that there are no error codes related to the EGR system.

    ### Final Notes:
    Always refer to the specific service manual for your Komatsu D51EX-22 or D51PX-22 for detailed instructions, torque specifications, and safety procedures as the exact steps may vary based on the model and engine configuration. If you are unsure or inexperienced, consider consulting with a professional mechanic.

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