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Thread: D4 6U .. Starting Engine Pinion brake needs Adjustment

  1. #1
    Join Date
    Dec 2006
    Location
    Saint Marys, Kansas
    Posts
    71

    Default D4 6U .. Starting Engine Pinion brake needs Adjustment

    Hi Guys,
    Sorry to ask, .... but I don't have a Service Manual that addresses the diesel engine starter pinion brake adjustment.

    When I pull the lever back the pinion brake still works, but not as well as it used to.

    Brake will usually still stop the pinion for a "no grind" engagement if I idle pony back as slow as possible .... but it needs help.

    Info on adjustment would be appreciated.
    Is the adjustment the same on a D2 4U as on the D4 6U?

    Thanks,
    Dan

  2. #2
    Join Date
    Nov 2007
    Location
    NW Ohio
    Posts
    2,639

    Default

    oil level is very important also, 30w oil should be fine. some times the pinion seal will leak oil into the clutch housing.

  3. #3
    Join Date
    Nov 2006
    Location
    Faunsdale, AL USA
    Posts
    3,616

    Default

    Here's a link to Sasquatch's video showing the clutch modification he did to solve the problem.
    https://youtu.be/5Xb9WzUxo5s
    If you want to try something a little less ambitious, drain the pinion oil and refill with ATF. It is not as thick and not as slick as motor oil, so it helps the brake and clutch work better. This allows the clutch to be adjusted looser and that makes the brake work better as well.
    D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time

  4. #4
    Join Date
    Dec 2006
    Location
    Saint Marys, Kansas
    Posts
    71

    Default

    Thanks for the suggestions !!

    Dan

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