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Old 01-08-2010, 12:33 PM
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New Drum Brakes Screeching

Didn't have time to do it myself, so took my '69 C-20 in to have the front drums done. New shoes, drums, wheel cylinders and hoses. Mechanic told me I'd probably have to adjust the shoes in a few days. Drove it home, stopped O.K. Next day the front drums are screeching, howling. Adjusted the shoes until there was a slight drag on the drums then backed them off a little bit. Still screeching. Do I need to adjust the shoes out some more?

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Old 01-08-2010, 12:48 PM
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Do you know what shoes he used? If he used semi metallic or metallic shoes they will squeal. Also if he used a house brand el cheapo shoe they will sequel also
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Old 01-08-2010, 12:59 PM
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I ordered the shoes from Classic Parts, so not sure what they were. I just pulled the drums and readjusted the shoes, still making noise.
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Old 01-08-2010, 01:22 PM
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Pulled the drums again. On the side that's making noise, it looks like the primary shoe is only making contact on the ends of the shoe.
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Old 01-08-2010, 02:49 PM
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Quote:
Originally Posted by Sinister
Pulled the drums again. On the side that's making noise, it looks like the primary shoe is only making contact on the ends of the shoe.
you didn't over stop trying to brake in and heated them new pads into
having hot spots , crystallizing them ?
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Old 01-08-2010, 02:58 PM
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Contact area on the shoe in question looks O.K., doesn't look burnt or crystalized, it's just making contact towards the ends of the shoe. Really weird.
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Old 01-08-2010, 06:54 PM
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Quote:
Originally Posted by Sinister
Contact area on the shoe in question looks O.K., doesn't look burnt or crystalized, it's just making contact towards the ends of the shoe. Really weird.
The bad shoe may be for an over size drum. This would cause contact on teh ends only and also would make noise.
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Old 01-08-2010, 07:22 PM
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hmmmmmh?

I'm a little suspicious of the work that got done...when was the last time a reputable mechanic sent anyone home with the expectation that the customer would have to adjust the brakes a few days later???? He should have been able to set them right and they then self-adjust as needed. AND, if only the ends are contacting, something is wrongo-mongo! Probably wrong shoes.
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Old 01-09-2010, 08:33 PM
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I called Classic Parts and told them what was going on, they're sending out new shoes. Thinking it might be a bad drum, I swapped drums from one side to another and the sound went away. I'll check the contact area on the shoe later this week .I also thought it was weird that I would have to adjust the shoes, like *** did I just pay these guys for?
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Old 01-09-2010, 08:43 PM
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New Drum Brakes

they didn't turn the drums ?
are they past turning ?
do yours have the springs around them ?
did you have to back off to remove ?
lot of ?'s ain't it ?
brake shop might have the answer , a good one .
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Old 01-09-2010, 09:05 PM
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Quote:
Originally Posted by burnt olds
they didn't turn the drums ?
are they past turning ?
do yours have the springs around them ?
did you have to back off to remove ?
lot of ?'s ain't it ?
brake shop might have the answer , a good one .
I said in the original post that the drums are new. The problem seems solved.
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