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Proper Name For These Parts... And Function?

Discussion in 'Flat Fender Tech' started by Eric, Aug 7, 2022.

  1. Aug 7, 2022
    Eric

    Eric Member

    CA
    Joined:
    Apr 13, 2006
    Messages:
    121
    I would search the forums for information on my own, but I do not know what these are called. They were on a 2A I had years ago. I know they go between the axle bumper and the frame. They seem to be designed to be a spacer (maybe their name?) but there might be a proper name for them. I am refering to the cast iron pieces in the photo... one is in place and the other is not.

    CJ2A axle bumper spacer.jpg

    Along with their name, what is their function? Would it reduce the travel of the axle?

    Thanks,

    Eric
     
  2. Aug 7, 2022
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

    Bozeman, MT
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    Jul 18, 2013
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    They are known as bump stops....the do limit the up travel of the axle to a 'safe' amount. Safe meaning it might be to keep some part of the axle from traveling to far up that it hits something (starter motor, front driveshaft, tire into the fender etc)...sometimes its also used to ensure the axle stops moving up before the shock reaches full compression - using the shock to limit as a bumpstop usually results in a broken/bent shock and can be sketchy at paved road speeds when hitting bumps and pot holes etc.
     
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  3. Aug 7, 2022
    oldtime

    oldtime oldtime

    St. Charles,...
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    Aug 14, 2006
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    3,254
    I prefer to use the original Willys nomenclature.
    The rubber is a standard item on all willys and is always referred to as an “Axle Bumper”,
    The cast iron items are listed under “special equipment and accessories” and are referred to as “axle bumper spacers”. They are associated with options such as a Monroe lift and the rear pto units.
     
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  4. Aug 7, 2022
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
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    I second both of the above.
     
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  5. Aug 7, 2022
    Eric

    Eric Member

    CA
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    Apr 13, 2006
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    Thanks! This old dog learned something new today! :)
     
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  6. Aug 26, 2022
    OnlyOneDR

    OnlyOneDR Member 2021 Sponsor 2020 Sponsor

    R
    Joined:
    Mar 4, 2020
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    107
    Initially on the 2A they were installed up front when there was a crankshaft mounted hydraulic pump to prevent axle contact with the pump and mount. On later 2As they were installed as standard. With the 3A the frame was re-designed to eliminate the need for the spacer on the front; the frame is physically thicker and "dips down" more so the bumper is all that is needed.
     
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