Shoe and drum problems
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Also on trueing drums, I don't just arbitrarily do it like I used to when I was in business. I've spent many hours standing in front of Aamco, Bear and FMC brake lathes. No matter how good you are at turning drums, they aren't really true. If you don't believe this, just true a drum, remove it from the lathe and then put it back in and start over. I've done this over and over and sometimes had to cut as deep as 20 thousandths to get the bit to contact full circle.
If it's a drum/hub and you are centering off the races, it is some better.
If it's a drum/hub and you are centering off the races, it is some better.
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Look at how a rear drum chucks in and what centers it. It's not something you'd make parts for NASA on. I know how to mount a drum in a lathe. If you don't believe me, just try it on your lathe.
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Try what I said and tell me a rear drum you already turned and chucked back in doesn't take a least a light cut to make the but touch all the way around.
And I always clean the surfaces where the mandrels set with a whiz wheel so there is no rust or crud to keep them from being concentric.
And I always clean the surfaces where the mandrels set with a whiz wheel so there is no rust or crud to keep them from being concentric.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
"Sorry about those new drums Mr. Smith. They're oversized now. Good news though, we have another pair they are on sale!"
Interesting info guys. I've always heard if drums are stored improperly they will get out of round, or dropped somewhere along the line can do it.
Interesting info guys. I've always heard if drums are stored improperly they will get out of round, or dropped somewhere along the line can do it.
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