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Steer Tire Dipping

Discussion in 'Trucks [ Eighteen Wheelers ]' started by NCBirdman, Nov 23, 2011.

Page 1 of 4
  1. Nov 23, 2011 #1
    NCBirdman

    NCBirdman Light Load Member

    58
    11
    Sep 14, 2011
    Hickory, NC
    0
    Need some help.
    New to me truck, 07 Pete 387
    Steers look to be 80 to 90%.
    Air preasure at 110%
    24" full size.
    Inside of passenger side is starting to dip a little, drivers side is even.
    I have driven truck regional for the past few weeks. Around 1900 miles.
    Pulls a little to the left, and has a slight vibration in the steering wheel, not to bad through.
    385K miles.
    What could be causing the dip.
    Thanks
     
    NCBirdman, Nov 23, 2011
    NCBirdman, Nov 23, 2011
    #1
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  3. Nov 23, 2011 #2
    dancnoone

    dancnoone "Village Idiot"

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    Do you mean cupping ???

    Bad kingpin or worn shocks can cause that.
     
    dancnoone, Nov 23, 2011
    dancnoone, Nov 23, 2011
    #2
  4. Nov 23, 2011 #3
    mgfg

    mgfg Road Train Member

    1,753
    626
    Mar 29, 2010
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    Alignment
    Tire Pressure
    Loose Wheel Bearings
    Worn Shocks
     
    mgfg, Nov 23, 2011
    mgfg, Nov 23, 2011
    #3
  5. Nov 23, 2011 #4
    NCBirdman

    NCBirdman Light Load Member

    58
    11
    Sep 14, 2011
    Hickory, NC
    0
    Yep, mean cupping.
    Tire pressure is same on both tires.
    Slight pull to the left would prob mean out of alignment.
    I will have to get it check out before it gets too bad.
    Thanks
     
    NCBirdman, Nov 23, 2011
    NCBirdman, Nov 23, 2011
    #4
  7. Nov 23, 2011 #5
    popmartian

    popmartian Road Train Member

    1,015
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    May 31, 2009
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    Got any pics? Are you talking about thread wear? it sounds like the alignment or suspension could be causing uneven wear.

     
    popmartian, Nov 23, 2011
    popmartian, Nov 23, 2011
    #5
  8. Nov 23, 2011 #6
    stranger

    stranger Road Train Member

    3,640
    4,959
    Oct 10, 2006
    NC
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    Shocks, wheel bearing, negative camber, too much caster on one side, king pin, rear axles out of alignment. If the rear axles are out of alignment, you will have outside wear on one steer tire, and inside wear on the other.

    Most places will put it on the machine, and if it's within specs, they wont touch the caster and camber, even though that will be your problem. The secret is getting the cross degrees between the two sides to be close.

    Try Caldwell Alignment on 321 in Hudson, which I consider extremely good, or Custom Alignment on hwy 18/64 just out of Morganton, going toward Lenoir. Both are old school places that fix it right.
     
    stranger, Nov 23, 2011
    stranger, Nov 23, 2011
    #6
  9. Nov 23, 2011 #7
    PackRatTDI

    PackRatTDI Licensed to Ill

    14,765
    22,568
    Jul 15, 2006
    El Chuco, Tejas
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    Mine was cupping on the right really bad. Had a bad shimmy at 45mph. It was a bad shock.
     
    PackRatTDI, Nov 23, 2011
    PackRatTDI, Nov 23, 2011
    #7
  10. Nov 23, 2011 #8
    NCBirdman

    NCBirdman Light Load Member

    58
    11
    Sep 14, 2011
    Hickory, NC
    0
    We used Cladwell back in the day, they were very good.
    They would actually shave tires to get them true.

    @popmartian I do not have any pictues of the tires, ust got back in, I will upload some in the mornig.
    Thanks
     
    NCBirdman, Nov 23, 2011
    NCBirdman, Nov 23, 2011
    #8
  11. Nov 23, 2011 #9
    stranger

    stranger Road Train Member

    3,640
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    Oct 10, 2006
    NC
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    I used to buy new tires, run them a few thousand miles, then have Caldwell true them. Smoothest ride ever.
     
    stranger, Nov 23, 2011
    stranger, Nov 23, 2011
    #9
  12. Nov 23, 2011 #10
    Flightline

    Flightline Road Train Member

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    Oct 1, 2011
    Almost There
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    Just a bad shock caused cupping on one side? You only got the shocks replaced and this curred it?
     
    Flightline, Nov 23, 2011
    Flightline, Nov 23, 2011
    #10
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