Re: Brake shoe question


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Posted by Vaughn [99.110.84.217] on Friday, October 14, 2011 at 10:25:52 :

In Reply to: Brake shoe question posted by Dan [72.92.129.135] on Thursday, October 13, 2011 at 12:20:42 :

Per the Army's TM 9-1808B

Diameter of new Drum = 14-1/8 in.
Thickness of new shoe lining = 1/4 in.
Drum wear limit = .020 in.

Generally oversized shoe lining = 1/4 in. + an additional .030 in. in material

A one ton rated truck is required to have riveted linings. Truck has built-in intelligence to prevent scoring of drum by lining rivets. The adjustment cam is cut in a manner that allows maximum wear of lining. Once lining meets that limit, the adjustment cam can be turned 360 degrees indicating replacement of lining is needed.

Some owners using glued linings have built the cam edge up by welding on material. The result is a scoured drum surface. Not recommended.




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