Peterbilt keeps breaking airbag studs

Discussion in 'Ask An Owner Operator' started by tamip, May 23, 2021.

  1. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    20210521_161156.jpg 20210521_234734.jpg 20210516_153024.jpg 20210502_181805.jpg 20210502_181654.jpg 20210521_161156.jpg 20210521_234734.jpg 20210516_153024.jpg 20210502_181805.jpg 20210502_181654.jpg 20210521_161156.jpg 20210521_234734.jpg 20210516_153024.jpg 20210502_181805.jpg 20210502_181654.jpg 20210521_161156.jpg 20210521_234734.jpg 20210516_153024.jpg 20210502_181805.jpg 20210502_181654.jpg 20210521_161156.jpg I have a 2011 peterbilt 386 with the low leaf suspension. The problem I keep having is for some unknown reason the rear air bag studs keep breaking. I've already replaced 4 airbags so this needs to be fixed. After the first stud broke we assumed the stud was damaged and put another bag on. Well after the 2nd air bag broke I made an appointment to get my leaf spring bushings done. They were pretty bad. The torque rods on top were replaced before the air bag issues started. The shop did a 3 axle alignment when they did the bushings. These bags typically last maybe a week or two tops before they break again. Anyone have this problem before? Please help.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. AModelCat

    AModelCat Road Train Member

    21,927
    101,243
    Jul 7, 2015
    Canuckistan
    0
    Doesn't look like its breaking to me. Looks like its bending. Going on a limb and going to guess loose u-bolts or broken center bolt in the spring pack. That spring has got to be walking back and forth or it is severely misaligned.
     
    lester, 77fib77, slow.rider and 3 others Thank this.
  4. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    Never said bending I said it keeps breaking the studs.
     
  5. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    The leaf spring bushings were just done. All new u bolts and such
     
    slow.rider Thanks this.
  6. AModelCat

    AModelCat Road Train Member

    21,927
    101,243
    Jul 7, 2015
    Canuckistan
    0
    I never said leaking either. I don't see broken studs either. I see bent studs.
     
  7. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    Yea I used wrong word lol
     
    77fib77 Thanks this.
  8. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    That one in the picture got fixed before it broke the stud
     
    77fib77 and slow.rider Thank this.
  9. Mattmanstroked

    Mattmanstroked Light Load Member

    167
    234
    Nov 24, 2019
    0
    Been there and done this. Had three fail like this in one day.

    Replace the leveling valve.
     
    Coffey, Midwest Trucker and slow.rider Thank this.
  10. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    3 in one day ####
     
    77fib77 and Nostalgic Thank this.
  11. tamip

    tamip Light Load Member

    79
    38
    Oct 9, 2013
    0
    Let me guess rear axle too
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  • Draft saved Draft deleted