Odd steer tire wear, wobble in the front end over 50mph?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Gumper, Feb 8, 2019.

  1. Gumper

    Gumper Road Train Member

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    My steer tires are wearing strange. The inner rib of the left is worn down, and the outside of the right is the same. The odd thing is only half the circumference of each tire is like this, and the other half is in good shape. It causes a pretty good wobble in the front end over 50mph. The kingpins are tight as are all the steering components. Supposed to take it to get the alignment checked tomorrow morning. Already put new shocks on, but the old ones seemed fine. Any thoughts?
     
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    Pictures of those tires please. Normally caused by rear axle alignment problems.
     
    wore out Thanks this.
  4. Gumper

    Gumper Road Train Member

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    I’ll try to get a picture tonight. It’s dark now, but I’ll attempt it. The front inner drives were wearing on the inside too before I rotated them, but it was a wave pattern all the way around. It has the AG100 suspension.
     
  5. Gumper

    Gumper Road Train Member

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    All tires are over 100 psi. Ok it’s hard to tell with these, but the first one is the wear on the inner drive from the front drives. Both tires look like this. The snow is packed in the divots on the right side of the tire which is the inside.
    6E5591B4-CE52-4582-B1AE-53EBD0DCAD72.jpeg
    This is the drivers side. 180 degrees aren’t worn, the opposite side is almost to the cords.
    7E45EF27-EF3E-420B-B82F-1517E1A963C1.jpeg 870057EE-F38C-48D2-B10A-EC9EA26A2889.jpeg
    Passenger side with the outside half worn. Not as bad as the other side, but still significant.
    185F1E54-4F17-40F7-BAD8-557EB826EDD3.jpeg 9C7F44E9-AA30-4FF7-9E65-65464FCE9144.jpeg
     
    BoxCarKidd and Oxbow Thank this.
  6. Working2party

    Working2party Medium Load Member

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    I have fought the same wear pattern on my fleet for most of my career!!! The best results I’ve found have been:
    1. Retorque all wheelbearings
    2. Check suspension bushings repair if needed, 3 axle alignment.
    3. Make sure your steer tires are mounted with dry air, with 10 or 12 oz of balancing compound.
    4. Changing from a narrow tire to one with. Wider footprint.

    I’ve made these updates through my fleet in this order. So far I’ve kept this type of wear to a minimum. But every time I seem to get it figured out, it comes back.
     
    Diesel Dave and Gumper Thank this.
  7. BoxCarKidd

    BoxCarKidd Road Train Member

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    We had to up grade the last AG 100 here. It had some worn out threaded bolt looking connectors on both sides between the drive tires. Told they are not available.
    Check the other bushings and wheel bearings as mentioned.
     
  8. bryan21384

    bryan21384 Road Train Member

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    How long have you had those tires?
     
  9. Gumper

    Gumper Road Train Member

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    They’re dated 2014. Been on the truck since I bought it a year ago. Yokohama steers, Bridgestone drives.
     
  10. Trucker2211

    Trucker2211 Light Load Member

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    1) Get a true 3-axle alignment from a reputable shop that actually adjusts the suspension and steering components and not just “says” it checked out ok. Tell them you want a print-out of the readings before & after and ask what they adjusted.

    2) Get yourself a set of Centramatic wheel balancers for the front axle. A set of 2 (1 for each side) will run about $200 and are worth every penny and then some.

    3) Issues solved.
     
    BigCam9670 Thanks this.
  11. boneebone

    boneebone Road Train Member

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    Do you use Centramatics or Balancing Beads?

    I used to have the same problems on my steers until I installed Centramatics on, now the steers wear as smooth as glass.
     
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