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Thread: harley 1937 U transmission rebuilding

  1. #1
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    Default harley 1937 U transmission rebuilding

    Hi, please advice....
    I just finished rebuilding of 37 U transmission.
    I just seal main drive gear like this... IMG_8638.jpg

    so how many cc oil should be in?

    tks
    Shin

  2. #2
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    Shin!

    Please fill it to the bottom of the filler plug threads, level of course.

    I'll guess in the neighborhood of 630 cc.

    And please use the same oil as for the motor; Good luck!

    ....Cotten
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  3. #3
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    hi Mr.Cotton, got it! thanks!!

  4. #4
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    Hi Mr,Cotton,

    I use oil single 50 for the motor. same one for the transmission too? not thicker one ... like 80 or 90?

  5. #5
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    North Hills, CA and Pine Grove, CA
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    50 or 60. The same as you use in the engine.
    Be sure to visit;
    http://www.vintageamericanmotorcycles.com/main.php
    Be sure to register at the site so you can see large images.
    Also be sure to visit http://www.caimag.com/forum/

  6. #6
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    ok, thanks Chris.

  7. #7
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    Please note, Shin,

    Oil can only access the main drive gear bearings by seeping past thrust washers.

    A heavy lube would be restrictive.

    ...Cotten
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  8. #8
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    got it! thanks Mr. Cotton!

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