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X15 Top End Set

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by north60, Feb 22, 2021.

  1. Feb 22, 2021 #1
    north60

    north60 Bobtail Member

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    Doing a top end set on a X15 Performance Series. After setting the valves you are supposed to check the running clearance on the jake brake rockers. What position is this checked in, anytime the exhaust valve is closed?
     
    north60, Feb 22, 2021
    north60, Feb 22, 2021
    #1
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  3. Feb 22, 2021 #2
    Goodysnap

    Goodysnap Road Train Member

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    Correct. Set brake clearance after adjusting exhaust valve clearance on the same cylinder.

    Spec is 7mm. Allen wrench works good substitute for buying the expensive Hockey stick from Cummins.
     
    Goodysnap, Feb 22, 2021
    Goodysnap, Feb 22, 2021
    #2
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  4. Feb 22, 2021 #3
    north60

    north60 Bobtail Member

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    I set the brake clearance already. My question is with the "Running Clearance" .025"-.110"
     
    north60, Feb 22, 2021
    north60, Feb 22, 2021
    #3
  5. Feb 22, 2021 #4
    Goodysnap

    Goodysnap Road Train Member

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    All adjustments are made with valves closed.
     
    Goodysnap, Feb 22, 2021
    Goodysnap, Feb 22, 2021
    #4
  7. Feb 22, 2021 #5
    pup

    pup Light Load Member

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    Check the running clearance after you make the adjustment. Let the engine brake rocker sit in its neutral or detent position. .025-.110 between the brake rocker & valve. I use a .025 & a stack up of guages to make up the .110 .
     
    pup, Feb 22, 2021
    pup, Feb 22, 2021
    #5
    north60 Thanks this.
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