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Caterpillar D3K, D4K and D5K: Maintenance (Every 50 Service Hours or Weekly)

The weekly maintenance procedure helps you infect/replace your cab filter, lubricate your equalizer bar center center pin, lift cylinder yoke bearings and inspect track pins.
MaintainX
08/10/2022

Caterpillar D3K, D4K and D5K: Maintenance (Every 50 Service Hours or Weekly)

The weekly maintenance procedure helps you infect/replace your cab filter, lubricate your equalizer bar center center pin, lift cylinder yoke bearings and inspect track pins.

    Cab Filter (Fresh Air) - Clean/Inspect/Replace (If Equipped)

    Note: Enclosed ROPS only

    • Screenshot2021-02-05at8.01.23AM.png

    Front Idler Position - Check/Adjust

    SystemOne Undercarriage

    The following check is for Caterpillar SystemOne Undercarriages that have the center tread idler.

    Check

    The SystemOne undercarriage requires shim adjustment when the wear on the link and the roller system is at 25%, 50%, and 75%. Move a 4.5 mm (0.180 inch) shim from the bottom of the idler bearing block to the top.

    Check the shim adjustment after moving the 4.5 mm (0.180 inch) shim.

    Check

    • Screenshot2021-02-05at8.04.07AM.png

    Adjust

    Note: Be sure to add the same number of shims to both the left and right side so the idler will remain centered in the track roller frame.

    Fine Tuning the Idler Height

    If the machine performance remains unacceptable after the shim adjustments, try the following steps.

    Moving the Top Shims

    Moving the Bottom Shims

    Reassembly

    Ripper Linkage and Cylinder Bearings - Lubricate

    • Screenshot2021-02-05at8.15.54AM.png

    Track - Check/Adjust

    Check

    • Screenshot2021-02-05at8.17.55AM.png
    • Screenshot2021-02-05at8.22.02AM.png
    • Screenshot2021-02-05at8.22.27AM.png

    If the track appears to be too tight or too loose, proceed to “Track Adjustment”.

    Track Adjustment

    ! WARNING

    Do not remove any parts until all pressure has been relieved to avoid possible personal injury. Relieve pressure by opening relief valve one turn maximum. See maintenance guide for track ad- justment procedure.

    ! WARNING

    Grease is under high pressure.

    Grease coming out of the relief valve under pres- sure can penetrate the body causing injury or death.

    Do not watch the relief valve to see if grease is es- caping. Watch the track or track adjustment cylin- der to see if the track is being loosened.

    Loosen the relief valve only one turn.

    Illustration 202

    • Screenshot2021-02-05at8.27.31AM.png

      Illustration 203

      • Screenshot2021-02-05at8.27.59AM.png

        Track Pins - Inspect

        ! WARNING

        Fingers can be burned from hot pins and bush- ings. The pins and bushings in a dry joint can become very hot. It is possible to burn the fingers if there is more than brief contact with these components.

        Use the recommendations in order to extend the life of the undercarriage. Use the recommendations in order to avoid excessive downtime.

        Consult your Caterpillar dealer's Custom Track Service expert if you detect dry joints or leaks. Your Caterpillar dealer's Custom Track Service expert can perform track inspection.

      Source: MaintainX (Community Member)

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