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Trailer Brakes Grabbing

Discussion in 'Trucks and Trailers' started by ed2hess, Oct 11, 2010.

  1. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 13,846

    What causes the trailer brakes to grab. I know about the two adjustments
    on the controller and that helps some but? Since these are one year old could it be the gap has widened and if I adjust the bands closer to the drum it would help?
     
  2. seabee1

    seabee1 LawnSite Member
    Messages: 239

    if you adjust the shoe's closer to the drum they will just grab sooner ! the drums could have Axel grease ,oil ,or just has rust on the drum .check the control for adjustability it may have the rheostat inside burned out . check out the control first then check the adjustment on the drums ,check the shoes and drums for rust ,being out of round shoe's worn out ,grease or oil on the shoes .
     
  3. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 13,846

    What do the two controls on teh controller do? According to the LED one goes from 0 to 9. The other one goes up in increments of .5 and I am set for about 1.5 on that one.
     
  4. seabee1

    seabee1 LawnSite Member
    Messages: 239

    :confused:what brand and model controller do you have ?
     
  5. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 13,846

    Looks like it is Drawtite and Activator III. I'll take the tires off tomorrow but these were replaced last year. There are two controls on the box one is a slider (0 - 9) and a rotory dial (.5 - probably 10.). I know that if I move the rotory to 3.5 I can skid the tires with a load when braking. So I am guessing that the rotory puts more voltage on the brakes. The slider must have something to do with how quick they respond to my depressing the pedal. And seems to affect the disengaging. Moving the slider doesn't seem to affect the grabbing. I will check for oil and rust tomorrow.
     
  6. seabee1

    seabee1 LawnSite Member
    Messages: 239

  7. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 13,846

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