| Re: [GMCnet] Brake Problems [message #271148 is a reply to message #270726] |
Tue, 03 February 2015 20:55   |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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kerry pinkerton wrote on Thu, 29 January 2015 08:09Gary Berry wrote on Thu, 29 January 2015 08:47... They fixed it by having the brake pads arched to match the brake drums. Each of the pads were just running on the tips. Not sure where one can have arcing done, but it fixed their problem....
Pretty common back in the 50's and 60's. Especially on old MOPARs. I've got a buddy with a machine but I've never needed to use it. Easy to check. Pull the drum, pull the shoe, check that the arc of the shoe matches the inside of the drum.
If the drum has been turned a lot or the shoes slightly out of spec, the arc can be off enough that the shoe won't be in full contact. I'm not sure that will cause the problem that he's describing but it would definitely effect brake effectiveness.
Arcing or cam grinding is now illegal in many areas due to asbestos problems. You can buy used machines but most shops will no longer do cam grinding. Unless you are OSHA compliant, I don't think you can get a new machine. Since drum brakes are disapearing in the industry, ther aren't too many people that know how to do it correctly.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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