Diff switch 2002 379 Peterbilt

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dock94, Oct 17, 2020.

  1. Oct 17, 2020 #1
    Dock94

    Dock94 Bobtail Member

    3
    4
    Aug 11, 2020
    0
    In pursuit of changing a gauge out on the 379 I must have pulled a little hard on the Diff switch and now have a hisss (air leak).
    Anybody ever change out a diff switch on a 2002 Pete 379?? If so how do I go about detaching the air lines? Cut em?
     
    Dock94, Oct 17, 2020
    Dock94, Oct 17, 2020
    #1
    TTNJ and blairandgretchen Thank this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Oct 17, 2020 #2
    lester

    lester Midwest's #1 Feed Hauler

    2,959
    8,098
    Jan 2, 2012
    NW, Iowa
    0
    No I think they use push lock fittings. Just try pushing the line in tight
     
    lester, Oct 17, 2020
    lester, Oct 17, 2020
    #2
    blairandgretchen Thanks this.
  4. Oct 17, 2020 #3
    062

    062 Road Train Member

    6,352
    34,037
    Oct 20, 2013
    0
    Probably have quick connect fitting with the plastic collar. To remove line, push collar in and pull line out. To make it easier use a wrench just bigger than the line to push in or drain air.
     
    062, Oct 17, 2020
    062, Oct 17, 2020
    #3
    blairandgretchen and pushbroom Thank this.
  5. Oct 18, 2020 #4
    blairandgretchen

    blairandgretchen Road Train Member

    14,018
    77,324
    Dec 9, 2011
    South west Missouri
    0
    This is for a 1995, but I’d assume it’s similar - push lock fittings.

    746BE727-C254-4267-8CFE-8DA7F932EEB2.jpeg
     
    blairandgretchen, Oct 18, 2020
    blairandgretchen, Oct 18, 2020
    #4
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.