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Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by EnglishMark, Mar 10, 2020.

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  1. Mar 10, 2020 #1
    EnglishMark

    EnglishMark Light Load Member

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    Feb 15, 2011
    orlando, Fl
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    Ok so this may take awhile to explain,
    I got new brakes/drums all round installed on my truck (07 Freightliner Columbia) after I left the shop there is/was a shake in the steering while braking at about 45 mph.. so braking from 65 down was ok till I got to bout 45 then shakes like crazy.
    So after a week I take it back to the shop and turns out my truck was spec'd with x30 drums, they get a set in put them on. No change .. so they call Freightliner in Orlando order new x30 drums for the front and x30 lightweights for the back and allllll new shoes. Installed... No change, .. went to another shop today they checked everything, bearings, kingpins, every engine mount trans mount body mounts, adjusted allllll the brakes and replaced the front slack adjusters (as a last resort) still shakes.
    Tires were new back in October michelins wearing perfectly. They were stumped, I'm over 2500 into this now for a simple brake job. Steering does not shake while driving only braking .. help.
     
    EnglishMark, Mar 10, 2020
    EnglishMark, Mar 10, 2020
    #1
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  3. Mar 10, 2020 #2
    shatteredsquare

    shatteredsquare Road Train Member

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    ctrl-z
     
    shatteredsquare, Mar 10, 2020
    shatteredsquare, Mar 10, 2020
    #2
    Badmon Thanks this.
  4. Mar 10, 2020 #3
    Judge

    Judge Road Train Member

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    Could be an out of round drum, just because its new doesnt mean its good.
    Could be a bad wheel bearing, but yes you said those were checked.
    Try jacking up the front end and see which tire won't spin freely., if they both spin very lightly apply brakes and see which one can't be turned
     
    Judge, Mar 10, 2020
    Judge, Mar 10, 2020
    #3
    EnglishMark Thanks this.
  5. Mar 10, 2020 #4
    6wheeler

    6wheeler Road Train Member

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    This is just a wild guess because it's happened to me.

    When the brake job was done, the drums were installed and then the air was released applying full brake to the drum that wasn't seated to the hub.

    Then when the wheels were put back on it didn't make a complete seat because the brakes were already applied. Might want to check lug nuts too

    Make any sense?
     
    6wheeler, Mar 10, 2020
    6wheeler, Mar 10, 2020
    #4
    shatteredsquare Thanks this.
  7. Mar 10, 2020 #5
    EnglishMark

    EnglishMark Light Load Member

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    Feb 15, 2011
    orlando, Fl
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    Judge we did that today, kingpins, bearings all good. These are the 3rd set of drums in 6 weeks .. law of averages says at least one set should of been good.
     
    EnglishMark, Mar 10, 2020
    EnglishMark, Mar 10, 2020
    #5
  8. Mar 10, 2020 #6
    EnglishMark

    EnglishMark Light Load Member

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    Feb 15, 2011
    orlando, Fl
    0
    Yeah makes sense but we have installed 3 sets of drums now .. plus had the wheels off n on 3 times today, plus drums off today, shoes look great after 2 weeks no odd wear .. I'm stumped.. last resort is take it to Freightliner but I'm already 2500 into this
     
    EnglishMark, Mar 10, 2020
    EnglishMark, Mar 10, 2020
    #6
    6wheeler Thanks this.
  9. Mar 10, 2020 #7
    Judge

    Judge Road Train Member

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    Ok. Who did they brakes?
    Were they put on backwards?
    (Yes it can be done in a hurry and not paying attention)

    Did you use new inserts and springs?
    Or the old ones?
     
    Judge, Mar 10, 2020
    Judge, Mar 10, 2020
    #7
  10. Mar 10, 2020 #8
    Judge

    Judge Road Train Member

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    If it only started when they did the brakes, one shoe is a little shorter, not much, inch maybe, if the first guy put it on wrong, then the next just followed suit, they could still be wrong.
     
    Judge, Mar 10, 2020
    Judge, Mar 10, 2020
    #8
  11. Mar 10, 2020 #9
    Hulld

    Hulld Road Train Member

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    If there is any rust or debris on the hub faces the drum will not sit completely flat to the hub and can cause a shutter upon brake application.
    Also one of the aluminum hubs could be bent if they beat the old drums off with a sledge hammer.
     
    Hulld, Mar 10, 2020
    Hulld, Mar 10, 2020
    #9
    EnglishMark and spsauerland Thank this.
  12. Mar 10, 2020 #10
    lester

    lester Midwest's #1 Feed Hauler

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    Wait a second, how can brakes be put on backwards? There's no way
     
    lester, Mar 10, 2020
    lester, Mar 10, 2020
    #10
    pushbroom Thanks this.
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