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  1. R

    Komatsu pc78mr tracks

    Looking for a used set of 450x81Nx76 tracks for my machine. Don’t use enough for new tracks. Anyone know anybody out there that has a 50% set. On the east coast.
    • RTCPC78
    • Thread
    • rubber tracks steel tracks
    • Replies: 0
    • Forum: Excavators
  2. R

    Grease for ring gear and bearing?

    What grease are most using for ring gear and bearing? I found this on my excavator. Drained water and removed as much grease as I could. Manual says NLGI 2 grease. I plan on repacking with 1.5 gal of grease. Just wondering what most are using? Everything seems pretty sealed up, how could the...
    • RTCPC78
    • Thread
    • grease lube ring and pinion ring gear
    • Replies: 8
    • Forum: Excavators
  3. R

    Equivalent Komatsu TO 30 final drive oil

    What is an available oil that is comparable to the TO 30 Komatsu oil. I have heard that some are adding SAE 30 wt oil and my concern is that it doesn't have the proper additives for the shear loads of the planetary gears in the final drive. I have also heard 90 wt gear oil as well. Any advice...
  4. R

    Komatsu PC78MR-6 boom/cab lighting-no power

    I am trying to repair the lighting on my PC78MR-6 and have tracked the power to the switch and all is good, power is coming to switch, switch works, display screen lights up, but I have no power coming to any lights on the cab or the boom. Any help in tracking down where the wiring runs for...
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