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Brake Drag

Discussion in 'Intermediate CJ-5/6/7/8' started by Iandavidh, Apr 17, 2020.

  1. Apr 25, 2020
    Iandavidh

    Iandavidh Member

    California
    Joined:
    Sep 24, 2018
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    398
    So I had my dad drive the Jeep while I listened to it and I definitely heard some rattling in the passenger rear drum. We did the 10-15 forward and back stops to make the self adjusters adjust themselves. Noticed the passenger rear tire was locking up during the moderate brake applications. I held my foot on the pedal for 3 minutes per the factory manual troubleshooting diagrams and didn’t feel much of a difference in pedal feel but the brakes were definitely grabby.

    That was all yesterday.

    Today I took all of the drums off and did not see anything out of the ordinary other than the front drums being difficult to take off(they went back on fine)

    I don’t have much experience with this so I’m a bit baffled
     
  2. Apr 25, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
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    When it’s at its tightest, crack a bleeder front and back. See if fluid shoots out.
     
  3. Apr 25, 2020
    Iandavidh

    Iandavidh Member

    California
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    That’ll narrow it down as to whether it is a mechanical or a hydraulic issue right?
     
  4. Apr 25, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
    Joined:
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    Basically. I’m really curious if it’s heat related, and if it’s predominantly front or back, and if that’s the circuit that is closest to the exhaust.

    And if it is, I’d check why the back pressure isn’t feeding back into the reservoir. I think the piston should rest in a spot that would allow pressure to release.
     
  5. Apr 25, 2020
    Iandavidh

    Iandavidh Member

    California
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    398
    Under normal circumstances there would be no fluid shooting out at all right?
     
  6. Apr 25, 2020
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Aug 3, 2003
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    Another diagnostic clue would be to do five minute drive, then check the temperature of each hub/drum. If one or more are hotter than the others, focus there first.

    An infra-red thermometer is handy as a cat for doing this, but your fingers will suffice.
     
    ITLKSEZ likes this.
  7. Apr 25, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
    Joined:
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    It should weep or dribble, but it shouldn’t be under enough pressure to shoot out with force.
     
    Iandavidh likes this.
  8. Apr 26, 2020
    Iandavidh

    Iandavidh Member

    California
    Joined:
    Sep 24, 2018
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    398
    I still have the old drums. Would it be worth it to swap those back on and see if it makes any difference?
     
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