Brake Boss Wrench

Brake Boss Wrench
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  • Item #: BC-100-BB2000
  • Manufacturer: Brak Chek
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Price $30.00

Hex sizes are 9/16", 7/16", 12mm and 5/16" square.

  • 9/16" for manual adjusters and Bendix ASA-5
  • 7/16" for Crewson, Gunite and Haldex ABA
  • 12mm for some older model Borg and Beck
  • 5/16" square for ArvinMeritor (Rockwell)

To adjust ArvinMeritor autoslacks, there is a need to backoff the adjuster to disengage the anti-reverse pawl or use 105PWL, Pawl Release Tool, available through our online store.


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