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Doing a rack job on dd13 engine.

Discussion in 'Freightliner Forum' started by All out Trucking, Jan 25, 2022.

  1. Jan 25, 2022 #1
    All out Trucking

    All out Trucking Bobtail Member

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    Jan 25, 2022
    0
    I have 2013 cascadia dd13 with 714,000 miles. What does that mean, the effect on the engine, consist of and how often should this be done.
     
    All out Trucking, Jan 25, 2022
    All out Trucking, Jan 25, 2022
    #1
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  3. Jan 25, 2022 #2
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,780
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    romulus,mi
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    It means adjusting the valve lash to manufacturer specs. If you don't know when it was last done, do it. Should be good till 1 million.
     
    QUALITYTRUCK, Jan 25, 2022
    QUALITYTRUCK, Jan 25, 2022
    #2
  4. Jan 25, 2022 #3
    Bean Jr.

    Bean Jr. Road Train Member

    5,337
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    Mar 30, 2014
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    Running the rack is a misnomer. 2 cycle Jimmies controlled the throttle with a rack gear, ala rack and pinion steering. As setting that was part of doing the overhead on them, they calledit "Running the rack" to differentiate from tuning a Cummins.
     
    Bean Jr., Jan 25, 2022
    Bean Jr., Jan 25, 2022
    #3
    Hammer166, Dino soar, msh and 2 others Thank this.
  5. Jan 25, 2022 #4
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    As mentioned above, no rack on anything on-road built in the last 20-25 years.
     
    AModelCat, Jan 25, 2022
    AModelCat, Jan 25, 2022
    #4
    Bean Jr., msh and QUALITYTRUCK Thank this.
  7. Jan 26, 2022 #5
    msh

    msh Light Load Member

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    Jul 18, 2021
    Los Angeles, CA
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    DD says first valve lash adjustment must be done after 100k, then after 500k miles. I do adjustments every 250k miles...
     
    msh, Jan 26, 2022
    msh, Jan 26, 2022
    #5
  8. Jan 27, 2022 #6
    Dino soar

    Dino soar Road Train Member

    4,589
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    Dec 8, 2017
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    I see you guys talking about rack jobs and DD I thought you were talking about something like this:

    Eo6lrsHUwAcyLVa.jpg

    e95b79856a87652d7adb89d9cef1809f.jpg
     
    Dino soar, Jan 27, 2022
    Dino soar, Jan 27, 2022
    #6
    QUALITYTRUCK, Hammer166 and Bean Jr. Thank this.
  9. Jan 28, 2022 #7
    MAMservices

    MAMservices Light Load Member

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    1,689
    Aug 9, 2021
    Mississippi
    0
    MAMservices, Jan 28, 2022
    MAMservices, Jan 28, 2022
    #7
    Bean Jr. Thanks this.
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