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Wheels over torqued?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by wall_404, Jul 23, 2015.

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  1. Jul 23, 2015 #1
    wall_404

    wall_404 Bobtail Member

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    Apr 22, 2015
    Ontario, Canada
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    Can anyone to tell if wheels have been over torqued? Seems I can't win in the wheel department. I have a driver who just went on holidays so we have our trainer driving that truck for the next two weeks. He just had wheel issues on the the highway. I was going to set the torque wrench to 600 to see if they are over torqued. The guy that was driving it was torquing them 2 or 3 times a week. If they're all over torqued can the torque just be backed off and readjusted or should the studs on all wheels be replaced?
    Thanks
     
    wall_404, Jul 23, 2015
    wall_404, Jul 23, 2015
    #1
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  3. Jul 23, 2015 #2
    daf105paccar

    daf105paccar Road Train Member

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    Did any off the studs break off?
    Is this with aluminum or steel rims?
     
    daf105paccar, Jul 23, 2015
    daf105paccar, Jul 23, 2015
    #2
    wall_404 Thanks this.
  4. Jul 23, 2015 #3
    wall_404

    wall_404 Bobtail Member

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    Apr 22, 2015
    Ontario, Canada
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    Steel rims and they all snapped off. I know they were all checked before the truck left the yard because I was there, nothing was loose, it rained the night before - no tell tale rust marks.
     
    wall_404, Jul 23, 2015
    wall_404, Jul 23, 2015
    #3
  5. Jul 23, 2015 #4
    daf105paccar

    daf105paccar Road Train Member

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    I think you allready know what needs to happen..........
    Bring the truk home asap and replace all the studs.
    Then have a friendly chat with the driver.(remember he is as strong as a horse )
    Make shure you have the right torque settings (get from manufacturer) and put in all truck a torquewrench.
    Then talk to your mechanics .(most likely they are using their airwrenches at the highest setting to tighten wheelstuds.)
    Make it clear to ALL that the torquewrench is the only correct tool.

    ps if things don't change ,in the future you will break more then studs.
    Trucks with diskbrakes don't like to be overtorqued.
     
    daf105paccar, Jul 23, 2015
    daf105paccar, Jul 23, 2015
    #4
    wall_404 Thanks this.
  7. Jul 23, 2015 #5
    GrapeApe

    GrapeApe Road Train Member

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    Why and how was he torqueing them 2-3 times per week? It depends on how tight they were, if they were so tight that a wheel broke off, I'd play it safe and replace all the studs. Over torqueing will stretch the studs and make them weaker, which is probably why they were coming loose. Everytime he tightened them, they stretched a little more.

    Think of any bolt as a spring, when its tightened, it stretches, which is the clamping force because the bolt is trying to spring back to its original length. If it's stretched to the point where it deforms, you loose clamping force.
     
    GrapeApe, Jul 23, 2015
    GrapeApe, Jul 23, 2015
    #5
    Ruthless, Heavyd and wall_404 Thank this.
  8. Jul 23, 2015 #6
    rollin coal

    rollin coal Road Train Member

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    Why are you torquing to 600 ft lbs? Every sticker I ever saw on a truck or trailer always said 450-500 ft lbs. 450 is plenty. Wheels don't need to be re-torqued multiple times a week.
     
    rollin coal, Jul 23, 2015
    rollin coal, Jul 23, 2015
    #6
    bubbanbrenda, Johny41 and wall_404 Thank this.
  9. Jul 23, 2015 #7
    wall_404

    wall_404 Bobtail Member

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    Apr 22, 2015
    Ontario, Canada
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    We torque to 500. Was only going to try 600 to see if they were over torqued. The one driver thinks he needs to torque all wheels 2 or 3 times a week. Another driver we have says he retorques after 100 KM but doesn't bother. The driver that had the problem yesterday hand checked them all before leaving.
     
    wall_404, Jul 23, 2015
    wall_404, Jul 23, 2015
    #7
  10. Jul 23, 2015 #8
    wall_404

    wall_404 Bobtail Member

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    Apr 22, 2015
    Ontario, Canada
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    We didn't how many times a week until I called him yesterday. I have a feeling he was giving it a couple of extra clicks as well, which stretched them to the point they snapped. There was a lot of construction on the route yesterday, potholes and bumps. Got the truck off the road, repaired it to the point we could get it back to our yard. Happened 10 minutes from home thankfully.
     
    wall_404, Jul 23, 2015
    wall_404, Jul 23, 2015
    #8
  11. Jul 23, 2015 #9
    allan5oh

    allan5oh Road Train Member

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    The way to check for stud stretch is with a straight edge. Put the straight edge along the threads and you will see a gap somewhere.

    Of only one stud has a problem, replace it and the two around it. If more than one stud has an issue, all studs need to be replaced.
     
    allan5oh, Jul 23, 2015
    allan5oh, Jul 23, 2015
    #9
    not4hire and wall_404 Thank this.
  12. Jul 23, 2015 #10
    boneebone

    boneebone Road Train Member

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    It sounds like the driver has OCD, there's no reason to re-torque the wheel nuts 2-3 times a week.

    If the nuts are torqued to the proper specs, there's no reason they're going to come loose.
     
    boneebone, Jul 23, 2015
    boneebone, Jul 23, 2015
    #10
    Bean Jr. and wall_404 Thank this.
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