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Re: turning brake drums...

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Posted by Bill Goodwin on June 27, 2005 at 05:59:24:

In Reply to: Posted by on June 26, 2005 at 23:42:57:

: : Does anyone know the maximum I.D. that you can turn a 9" drum to?

: IIRR, Colorado law said we could turn drums .060" over the original DIAMETER, and wear them to .090" over. The next question is, were these 9" drums actually 9" new, and not 8.950", or 9.095", or something? Q.

I think Q is on the right track. Each state will have a requirement and some may be different. I do not know the max amount allowed here in Maryland. I do know the guage inspection stations use tells them if they can turn or not. I think it has more to do with the thickness of the drum rather than the percise orignal diameter. Most shops here will not turn if in doubt or already over. A shop can be sued if a durm shoud crak or brake and cause a accident. (Historic's don't need inspections here) The point is safty. The brakes have a max travel distance at the cyl and only so much adjustment at the shoes. .06 to .09 would seem to be about at that limit and still have brakeing force. I know ive done it replaceing orignal durms is a pain with revoming the studs. How you use your Jeep now comes into question. Heavy brake use causes heat and too thin drums will fail. Bill

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