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Reusing Shackle Ubolts

Discussion in 'Early CJ5 and CJ6 Tech' started by Brislin06, Dec 28, 2019.

  1. Dec 28, 2019
    Brislin06

    Brislin06 New Member

    Pennsylvania
    Joined:
    Oct 23, 2017
    Messages:
    37
    Hello gents.....a few months back I replaced my leaf pack in the rear. I installed new ubolts and nuts. I’m going to put an add a leaf in so the ubolts have to come apart. My question is should I reuse those ubolts and nuts? they have been on the Jeep for less than a year.
     
  2. Dec 28, 2019
    jeep2003

    jeep2003 Active Member

    Vestal NY
    Joined:
    May 30, 2006
    Messages:
    1,492
    Iv never had a problem reusing them
     
    Twin2, Iandavidh and ojgrsoi like this.
  3. Dec 29, 2019
    Jeff Bromberger

    Jeff Bromberger Straight outta Bellevue! 2020 Sponsor 2019 Sponsor

    Dallas Metroplex...
    Joined:
    Jun 28, 2019
    Messages:
    86
    I was taught that once you torque them up, you should not re-use them due to stretching of the threads.

    Your case, of course, is interesting since by adding a leaf, you're changing the threads that you'll be torque-ing up.

    What I'd do is say reuse it, but check torque later on (after a ride or two) to handle any stretch that may have happened.
     
  4. Dec 29, 2019
    masscj2a

    masscj2a Member 2020 Sponsor 2019 Sponsor

    Chester Mass
    Joined:
    Dec 27, 2013
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    481
    If I didn't have new ones, I have used the old ones. No problems yet over 45 years. But if I have new I use them. I know that doesn't help much.
     
  5. Dec 30, 2019
    Labeeman

    Labeeman New Member

    Joined:
    Feb 24, 2016
    Messages:
    37
    I reused mine after doing a lot of reading on different forums. A majority of people said it was ok to use them as most people will not put enough stress on them to cause any problems.
     
  6. Dec 30, 2019
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,632
    I have re-used them even though told not to.

    But I noticed that on my YJ that it seemed that "re-torquing" never ended until I chickened out and just stopped trying.

    I suspect they may have been continually stretching, and the question thus would be, at what point do they fail? And what would the consequences be?

    New U-bolts can be made to order at many parts places, and are not real expensive.
     
  7. Jan 1, 2020
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    4,537
    I use 'used' U-bolts for fitting and building. I always replace them with NEW once I'm done and going to run the rig. I too was taught not to use them again as they are designed to stretch at torque and NOT be reused. Had this confirmed by the guys at the 'Spring' shop I use that makes my new ones... 'Course they have a vested interest in using new, but it has always made sense to me and they are not that expensive.

    I might do a 'test run' with used, but never keep them on that way.
     

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