Brake drum issue legality

I have never gotten an inspection with one or seen a drum measuring tool in the hand of a inspector. I am not doubting there are, just haven't seen one and just saying it isn't that common.

You got nothing to worry about with those drums. They look like typical wear to me.

 

I usually don't replace the drum until the brake cam rolls over. That's the sign there gone beyond.

 

THOSE cracks spidering across the drum? It's OOS. I don't exactly see glazing yet. But those drums with that type of spiderwebbing crossing side to side from the inside wheel outwards to where you are looking inside.

Solution, new drums. It's better to replace the drum now before those nice thick pads get cooked and then glazed and have to be replaced too.

 

accuride.com has a download of data on max. ID specifications.
I believe I've even seen the max. dia. cast into outside edge of some drums.
Not many people turn them anymore to resurface the ID.

 

Ive taken flat bed trailers into the shop to be inspected specifically inside the drums for a month as a sweep against company drivers abusing trolley valves. The drums, there were three on two trailers that spidered and glazed right across the whole surface all around inside. I did not pay much attention to them until the bosses got us involved to more closely pretrip for that problem. Which was a benefit anyhow because all my work with them was mountain on ice I cannot have a trailer not respond to my work.

 

For what it cost to turn them. It is about the same price for new. I replace drums when I replace the shoes.

 

We turned ours a couple years ago. We warped two trying to save a life last week. Those will have to be repalced because most rotors are designed with one turning in mind over it's life as a means to postpone total replacement.