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Thread: 29JD crankcase oil amount

  1. #1
    Join Date
    Feb 2009
    Location
    South Germany
    Posts
    66

    Default 29JD crankcase oil amount

    Own now a 1929 JD and my experiences with that Harley are young. One of my several questions is, how much is the right amount
    of oil in the motor cankcase? It means, when I drain it, how much should it get out...
    And, second, have the original 1929 Riders Hand Book, but the fotos are bad visible. E.g. has anyone the foto at page8, mechanical
    oil pump, in a sharp Version? Thanks George

  2. #2
    Join Date
    Jan 2006
    Location
    Menomonie, WI
    Posts
    1,372

    Default

    On my 1925 JD I always want to see more than 3 oz and less than 6 oz when I dumped the oil.

    Jerry

    Quote Originally Posted by Schorsch View Post
    Own now a 1929 JD and my experiences with that Harley are young. One of my several questions is, how much is the right amount
    of oil in the motor cankcase? It means, when I drain it, how much should it get out...
    And, second, have the original 1929 Riders Hand Book, but the fotos are bad visible. E.g. has anyone the foto at page8, mechanical
    oil pump, in a sharp Version? Thanks George

  3. #3
    Join Date
    Feb 2009
    Location
    South Germany
    Posts
    66

    Default 29JD crank case oil

    Quote Originally Posted by Jerry Wieland View Post
    On my 1925 JD I always want to see more than 3 oz and less than 6 oz when I dumped the oil.

    Jerry
    Hi Jerry, thank you for your reply - helpful for me. I have 7.7 oz normally - too much I think. The ball at the hand oil pump is tight.
    May be my mechanical oil pump puts too much oil into the Motor...? George

  4. #4
    Join Date
    Aug 2013
    Location
    1 mile east of the Rocky Mountains.
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    969

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    one cause of over oiling can be that the mechanical oiler its self is worn. significant force is placed on the 2 spring loaded pins that rotate against the swash plate that causes the holes the plungers operate in to elongate. these 2 pins are responsible for metering the oil in the desired amount. if there is enough wear in those holes, even no washers behind the adjusting screw will not decrease the amount of oil enough to prevent over oiling. my understanding is 9 ounces of oil in the crank case is where the flywheels begin to drag leading to overheating.

  5. #5
    Join Date
    Jan 2003
    Location
    England
    Posts
    1,426

    Default

    On the VL I would say 150-200 ml of oil in the cases. More than this and it comes out of the motor. You can hold the mechanical oil pump swash plate more vertical with a longer screw at the rear, such as 037, 038 or 039, and this reduces the stroke of the little pistons inside. First check the oil pump is set up correctly - just wide open with the throttle wide open.

  6. #6
    Join Date
    Apr 2013
    Posts
    23

    Default

    I have found 3oz is too little. I have much less wear running 5oz. Less than this doesn't supply enough oil to the cam/timing gears.

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