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Old 03-22-2009, 09:48 PM
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repair brake drum?

Hi all, today I was cleaning rust off my brake drums and set one down in a percarious place. Of course it fell on the floor, and took a chunk out of the edge that overlaps the backing plate.

Should I toss it, leave it alone and use it, or try to repair it? It's probably not that expensive a part, but of course I'd have to replace them both. If I leave it alone and use it, will it be safe, and/or will it be out of balance? I have the tools to braze it, but not the best of skills. Did a search and realize it's possible, but is it worth it? I'm just a little po'ed at myself for letting it break.

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Old 03-23-2009, 06:19 AM
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A pic of the extent of the damage would be very helpful.
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Old 03-23-2009, 06:20 AM
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i dont think it would do anything but it could have micro hairline cracks now. i dont know? u could probably pick up a set at a salvage yrd pretty cheap. i wouldn't braze it .
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Old 03-23-2009, 06:36 AM
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Bite the bullet and replace them, IMO.

It may be OK except for the balance (if front, could be spun balanced on car), but if it were to fail it could kill someone, you possibly.

You may have a problem getting it turned. A machine shop would be within their rights to not turn a cracked or chipped drum.
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Old 03-23-2009, 09:42 AM
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I doubt seriously that you could ever get the drum perfectly round which obviously going to cause vibration issues. Secondly, the expansion and contraction of the metal from repeated braking is probably goin to cause those welds to fail in short order. Your probably looking at less than $100 to replace both of them, I think the piece of mind in knowing your not going to have a brake failure that could cause an accident or possibly damage other parts like wheels or tires is well worth the price of the new drums. Just my $.02
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Old 03-23-2009, 02:41 PM
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Here's a picture of the break. I'll probably replace them, but I was so ticked that I did such a stupid thing. Maybe I can blame it on the dog!
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Old 03-23-2009, 04:55 PM
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I have seen people run them like that.but i would replace them. cole
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Old 03-23-2009, 05:56 PM
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I would be concerned about it being round. They are cheap enough, I would just replace it
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Old 03-23-2009, 09:58 PM
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Yeah, you guys are right. I'll replace em both.
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Old 03-23-2009, 10:06 PM
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After seeing the pic, it is not likely to have mortally hurt the drum. Just take a grinder and deburr it, then cut the same piece away 180 out on the other side for balance.
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Old 03-24-2009, 07:07 AM
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Yeah I think I would run them that way. At least until you can get some new ones. You may not even notice much of a mis balance. I thought the damage was contacting the shoes. I know safety is important but i dont see any safety issue with that.
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Old 03-24-2009, 11:03 AM
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Thanks guys, it's going to be a long while before it gets on the road, so I'll worry about it then. You don't think brazing would be a good idea? More for asthetics than anything.
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