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

This weekly maintenance procedure gives you a list of how to clean/inspect and replace (if needed) cab filters, check and adjust front idler position. It also checks the SystemOne undercarriage, together with the shim adjustment.
MaintainX
05/03/2021

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

13 steps
This weekly maintenance procedure gives you a list of how to clean/inspect and replace (if needed) cab filters, check and adjust front idler position. It also checks the SystemOne undercarriage, together with the shim adjustment.
  • 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

  • Illustration 203

  • 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.

Please note that any procedure, checklist, or other document available in the MaintainX Global Procedure Library is provided for general education and information only and does not constitute legal, medical, or financial advice. MaintainX makes the materials available AS IS and AS PROVIDED, without warranties of any kind. By downloading or using any such materials, you assume the risk that they may not be appropriate for your specific situation and agree that you are solely responsible for any such use, including compliance with applicable law and with meeting any conditions of product warranties.