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Cummins Big Cam NT88 Jake Brake

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by A73Mac, Jan 9, 2020.

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  1. Jan 9, 2020 #1
    A73Mac

    A73Mac Bobtail Member

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    Dec 24, 2011
    Dallas, Texas
    0
    I have a Cummins NT88, CPL 0840 which is a fixed timing model. Jacobs calls for a Model 430 with a 016007 housing assy.

    I have a set of Model 430's but they are 014878 housings for step timing.

    If I change out the Auto-Lash Adjusting Screws with P/N 16012, or new P/N 20511, will they work? Or are there other differences?

    I appreciate any help I can get. Thank you.
     
    A73Mac, Jan 9, 2020
    A73Mac, Jan 9, 2020
    #1
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  3. Jan 9, 2020 #2
    x1Heavy

    x1Heavy Road Train Member

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    x1Heavy, Jan 9, 2020
    x1Heavy, Jan 9, 2020
    #2
    Hulld Thanks this.
  4. Jan 9, 2020 #3
    Hulld

    Hulld Road Train Member

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    Hulld, Jan 9, 2020
    Hulld, Jan 9, 2020
    #3
    Coffey and A73Mac Thank this.
  5. Jan 9, 2020 #4
    A73Mac

    A73Mac Bobtail Member

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    Dec 24, 2011
    Dallas, Texas
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    Well, the set I have is actually Jacob's not TecBrake. But I thank you just the same.
     
    A73Mac, Jan 9, 2020
    A73Mac, Jan 9, 2020
    #4
    Coffey, x1Heavy and Hulld Thank this.
  7. Jan 10, 2020 #5
    Hulld

    Hulld Road Train Member

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    Hulld, Jan 10, 2020
    Hulld, Jan 10, 2020
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  8. Jan 10, 2020 #6
    Hulld

    Hulld Road Train Member

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    Hulld, Jan 10, 2020
    Hulld, Jan 10, 2020
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    Coffey Thanks this.
  9. Jan 10, 2020 #7
    Hulld

    Hulld Road Train Member

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    Funny?
    it won’t post the correct link to the Jacobs application guide?
     
    Hulld, Jan 10, 2020
    Hulld, Jan 10, 2020
    #7
  10. Jan 10, 2020 #8
    SmokinCAT

    SmokinCAT Road Train Member

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    The housings are not backwards compatible.
     
    SmokinCAT, Jan 10, 2020
    SmokinCAT, Jan 10, 2020
    #8
    Coffey, spsauerland, pushbroom and 1 other person Thank this.
  11. Jan 10, 2020 #9
    A73Mac

    A73Mac Bobtail Member

    13
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    Dec 24, 2011
    Dallas, Texas
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    This information out out of the Jacob's 430 installation manual is what I'm referring to. Hoping that the housings are the same just with different slave piston auto lash adjusting screws.
     

    Attached Files:

    A73Mac, Jan 10, 2020
    A73Mac, Jan 10, 2020
    #9
  12. Jan 12, 2020 #10
    A73Mac

    A73Mac Bobtail Member

    13
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    Dec 24, 2011
    Dallas, Texas
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    By this do you mean that there are other physical differences between those for fixed and those for step timing?
     
    A73Mac, Jan 12, 2020
    A73Mac, Jan 12, 2020
    #10
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