Brake drums

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PanJud
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Brake drums

#1

Post by PanJud » Thu Sep 08, 2011 4:21 am

What are the odds that the new drum is as warped as existing one? (Front---kicking my arse, I have to leave it loosed so it doesn't drag every revolution, to the point where it barely holds me on a hill. Difficult to find someone who can true these things, noone seems to have a setup which can hold them)


perplexed



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Re: Brake drums

#2

Post by jdpan » Thu Sep 08, 2011 5:02 am

Drum brakes were invented right along with the wheel. If it's not working there's something wrong. I prefer mechanical drums, my old '57 stopped on a dime,,, the discs I have now, not so much.

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Re: Brake drums

#3

Post by steinauge » Thu Sep 08, 2011 11:51 am

Could be a warped drum.Did you fit the shoes to the drum? Did you center the brake when you assembled?-To center get the wheel off the ground,loosen the anchor bolt,have someone turn the wheel as you slowly apply the brake until it wont turn anymore,tighten anchor bolt.Anyone with a lathe should be able to skim the drum.It can be set up in a 3 jaw chuck.Just be sure to wrap a piece of inner tube around the o.d of the drum so it doesnt chatter while machining it I have often found new aftermarket drums that were WAY out of true.

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Re: Brake drums

#4

Post by john HD » Thu Sep 08, 2011 12:00 pm

i had an imported repro drum and sprocket that was so bad it made the chain bounce off the frame and chain guard.

into the scrap bin, i think cotten got the sprocket for his gate project. so at least i got 5 bucks back out of it!

john

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Re: Brake drums

#5

Post by PanJud » Thu Sep 08, 2011 5:31 pm

I ought have mentioned front mechanical ('62) Yah, have gone thru the 'slowly spinng wheel while tightening bolts opposite each other slowly'....That process DOES improve things somewhat, comes out different every time though. I've taken the old drum to 2-3 places, only guy with a set-up it could be affixed to was at a machine shop....maybe will try afew places with newer drum before I proceed further

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Re: Brake drums

#6

Post by awander » Sun Sep 11, 2011 12:48 am

What have you got against machine shops?

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Re: Brake drums

#7

Post by PanJud » Sun Sep 11, 2011 4:02 am

awander wrote:What have you got against machine shops?
Only 1 machine shop about, the guy had a stroke.....had to close down his business. DID ascertain the drum was warbled a bit--as I stared at it, could see where metal edge of shoe was hitting about half of the drum---little skinny line about 1/8--3/16" wide. Should rephrase that--DRUM isn't warbled, but that's the net effect. Might need to figure out here to put a shim or 2 between 2 of the 5 lug-bolts and hub

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