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Thread: JDH oil pump

  1. #1

    JDH oil pump

    What Oil Pump fits the JDH? my 28 oil pump doesn't!
    A good friend will come and bail you out of jail.....
    But a true friend will be sitting next to you saying...
    Damn we screwed up!

  2. #2

    Re: JDH oil pump

    It's the same oil pump as used on singles of the same period. The threaded lug on the back is longer to project thru the thicker aluminum case cover. It also has a two hole bracket mount on top for a control wire bracket. Fred Lange in CA makes a special nut that allows the use of a standard oil pump on the two cam cover.
    Mark Masa

  3. #3
    Join Date
    Nov 2007
    Location
    South Australia
    Posts
    939

    Re: JDH oil pump

    I have also seen and have a pic posted somewhere on here of a throttle controlled pump with a sight glass on a JDH
    regards Phil

  4. #4
    Join Date
    Nov 2007
    Location
    South Australia
    Posts
    939

    Re: JDH oil pump

    Quote Originally Posted by vlscout View Post
    I have also seen and have a pic posted somewhere on here of a throttle controlled pump with a sight glass on a JDH
    regards Phil
    found it in How many real JDH's are left

  5. #5

    Re: JDH oil pump

    Last edited by 2cam; 02-20-2012 at 11:59 AM.

  6. #6
    Join Date
    Nov 2008
    Location
    new britain pa
    Posts
    1,779

    Re: JDH oil pump

    eric here is how you can make your 2nd oil line


    you can drill and tap the jd and jdh oil pump body for more lines

  7. #7

    Re: JDH oil pump

    Anyone have a single oil pump for sale? got the special nut for the pump with the motor from Fred Lange, he didn't say I would need a single type pump!
    A good friend will come and bail you out of jail.....
    But a true friend will be sitting next to you saying...
    Damn we screwed up!

  8. #8

    Re: JDH oil pump

    With that special nut, you can just use a standard 1928-29 JD oil pump. If you have the single oil pump ( the same as the JDH oil pump), you don't need the special nut.

  9. #9

    Re: JDH oil pump

    Ok Mark
    just checked the nut supplied, looks just like the original but with a shoulder, tried my pump but when I line it up with the 2 holes in the cover the pump is off centre. maybe its not the special nut?
    maybe i'm doing it wrong? I have to rotate the pump to align the brass feed? and fixing screw hole then it clears the dome in the cover but, puts the threaded section that goes over the drive, off centre to the hole in the cover?
    Still waiting to hear back from Fred!
    A good friend will come and bail you out of jail.....
    But a true friend will be sitting next to you saying...
    Damn we screwed up!

  10. #10

    Re: JDH oil pump

    Hi Dingo,

    Here picture of the oil pump mount on my 2cam
    IMG_1389.jpg

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