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  1. J

    1996 Komatsu PC60-6 - Left track backwards moves full speed, left track forward very slow

    Not that model but on other excavators I have flipped the lines at the manifold for the drives. If the drive is still slow it's usually the drive. If not, you can proceed with troubleshooting
  2. J

    HM400 Box Control

    Believe or not, just had this issue on a HM400-2. Found the issue in the electronic pilot control. It is mounted on side of the hydraulic tank. Can't say for sure the HM400-1 is the same. I believe there is a switch in that dump handle but can't remember if it can be purchased separately.
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