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Thread: Looking for part #

  1. #1
    Join Date
    Nov 2008
    Location
    phelan ca
    Posts
    208

    Default Looking for part #

    Looking for a part # for a 39 9k grader master cylinder cap and gasket I believe 1 1/4 theads
    1929 cat fifteen,1942 cat12 grader,1956 D47u with 4S blade,

  2. #2
    Join Date
    Nov 2006
    Location
    Corralitos, Ca.
    Posts
    15,309

    Default

    Cap/plug 4B8987
    Gasket 4B8988

  3. #3
    Join Date
    Nov 2008
    Location
    phelan ca
    Posts
    208

    Default Thank you

    Can they be found at auto parts store
    1929 cat fifteen,1942 cat12 grader,1956 D47u with 4S blade,

  4. #4
    Join Date
    Nov 2006
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    Corralitos, Ca.
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    Default

    Looks like the old type Ford master cylinder to me.

  5. #5
    Join Date
    Nov 2007
    Location
    NW Ohio
    Posts
    4,124

    Default

    4B8987 Plug [cap] is $11.92 from Cat gasket must be included, 4B8988 does not show but could have changed part #s check with Cat.

  6. #6
    Join Date
    Nov 2008
    Location
    phelan ca
    Posts
    208

    Default

    Ok that's not bad. 1961 Corvette uses the same but they want 55.00 so looks like I will get from cat
    1929 cat fifteen,1942 cat12 grader,1956 D47u with 4S blade,

  7. #7
    Join Date
    Nov 2006
    Location
    Corralitos, Ca.
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    Default

    Plug the number in to ebay!!!!!

  8. #8
    Join Date
    Nov 2008
    Location
    phelan ca
    Posts
    208

    Default

    Now the question is did someone put a different master cylinder on it in its lifetime my cap measures 1 1/4 outside of treads and I don't know what the cat one measures
    1929 cat fifteen,1942 cat12 grader,1956 D47u with 4S blade,

  9. #9
    Join Date
    Dec 2006
    Location
    victoria australia
    Posts
    3,395

    Default Brake Master Cylinder

    Hi Team,
    seem to recall most of the M/C's or indeed most brake components, were Wagner or Lockheed.
    Cheers,
    Eddie B.

  10. #10
    Join Date
    Nov 2006
    Location
    Corralitos, Ca.
    Posts
    15,309

    Default

    4B8987 is 1-1/4 UNEF which is 18 tpi.

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