Help me explain what he did wrong...

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Money-Mike, Jun 27, 2019.

  1. Money-Mike

    Money-Mike Light Load Member

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    Right rear chamber caught a rock on a construction site and bent the bracket and rod. Brake was dragging and had to replace.

    In-house mechanic replaced it but I cant get him to understand that the rod length is wrong and angle of the slack to rod is off and can get shut down.... I dont even think the top shoe is touching the #### drum.

    20190627_081404.jpg
     
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  3. Superhauler

    Superhauler TEACHER OF MEN

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    Bent the whole s - cam bracket ? Your right not lined up correctly....big red flag !!!!
     
  4. Money-Mike

    Money-Mike Light Load Member

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    Yea we've had a few of our regular f550's get hung up on some of these magic boulders, knocked someone's oil pan the other day.

    So the chamber and s-cam bracket are brand new. He swears he cut the rod the same length and I was like, there is no possible way you did. The thing is like 2-3 inches more out of the chamber than the other and the slack angle is like at 45-60 degrees.

    Did he cage one and not the other when he measured or is he just full of it?
     
  5. spsauerland

    spsauerland Road Train Member

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    Picture with brakes released or applied?
     
    pushbroom Thanks this.
  6. Brandt

    Brandt Road Train Member

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    Looks like the other brake chamber is rusting out.

    Did he adjust the slack adjuster, that possible also.
     
  7. Money-Mike

    Money-Mike Light Load Member

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    Parking brakes are applied
     
  8. Money-Mike

    Money-Mike Light Load Member

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    I have no clue. I was driving the spare 1991 when he was installing it.

    Not really rusted, it's a construction hauler so its covered in really fine dust, concrete dust, mud, etc.
     
  9. AModelCat

    AModelCat Road Train Member

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    Auto slacks typically always want to adjust to a 90 degree applied angle. Cut the pushrod too short, it'll overstroke. Cut it too long and the brakes might end up too tight. I'd verify the brake is properly adjusted before anything else.
     
    spsauerland Thanks this.
  10. spsauerland

    spsauerland Road Train Member

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    Take picture of them released.
     
  11. Money-Mike

    Money-Mike Light Load Member

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    I know that yesterday with the same rod length, the brakes were not touching and the drum would spin freely. He says he adjusted them (this morning), but I suspect that didnt happen.
     
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