Trailer brakes locking up on one axle

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by tnc110, Oct 20, 2024.

  1. tnc110

    tnc110 Light Load Member

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    Trailer is tri axle. Front and rear axles lift. Center axle has abs sensors. Disc brakes on all 3 axles. The other day I had the rear axle lifted and could spin it in reverse by hand but it would lock up if I tried to spin it forward by hand.

    was under a load the other day with all axles down and when I would release the brake it was like one axle was applying break pressure in 1second pulses…like abs was engaging.

    All 4 tires on rear axle look like they have been drug on spots around the diameter.

    any ideas what’s going on here?
     
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  3. tnc110

    tnc110 Light Load Member

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    May 22, 2016
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    Never mind…. IMG_6999.jpeg
     
    Heavyd, Shawn2130, Oxbow and 4 others Thank this.
  4. blairandgretchen

    blairandgretchen Road Train Member

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  5. tnc110

    tnc110 Light Load Member

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    What would cause a rotor to break like this. Just too much salt/rust?
     
    Concorde Thanks this.
  6. FLHT

    FLHT Road Train Member

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    Heat
     
    Concorde Thanks this.
  7. Goodysnap

    Goodysnap Road Train Member

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    Cheap steel and salt on the roads certainly makes it worse.

    If available look for coated rotors will last longer in Rust belt.
     
    Rideandrepair, Shawn2130 and Oxbow Thank this.
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