Rear brakes acting odd, grab extremely hard

Discussion in 'Kenworth Forum' started by irishluck09, Nov 17, 2022.

  1. irishluck09

    irishluck09 Light Load Member

    217
    91
    Nov 24, 2019
    0
    98 w900 n14 13spd

    So when Im empty of bobtailing, my brakes have been acting pretty weird.

    When I go to apply them i gently push down, which doesnt immediatly grab, and then it grabs hard were myself will actually jerk forward a bit. Sometimes it sounds like a hard grind noise or a squeak when stopping. I guess some would referr to it as dump truck brakes?

    I dont know what to look at first. The shoes are good and I keep the slacks adjusted, but I know they shouldnt grab as hard as they do when you apply the first little bit of brake pressure.

    Anyone have any thoughts? This is on the drives. I orginally thought it was the steer axle so I had replaced the shoes, drums, slacks and air pods and nothing had changed which then I realized it was coming from the drive axles instead.
     
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  3. Jed2009

    Jed2009 Light Load Member

    141
    411
    Jan 8, 2020
    Midwest
    0
    Any warble / pulsating when stopping at low speeds? I ended up getting new drums and shoes but didn’t realize my s cams on 3 of 4 ends were ruined. Torched the new drums within a week. Made them warp. I would try my hardest to touch the brake with my toenail… but they’d still grab and sometimes even drag the tires. Also pulsate / wobble as I get slowed down.

    I replaced the drums finally, and it’s nice and smooth now. It was the worst bobtail. Bad with empty trailer. Least noticeable with a full load. Much better now.
     
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