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Those are suppose to be raised. If they are grooved it means the grooves are below the raised part. I don't think grinding them down will do anything. It's not very thick metal.
Last edited by KansasCityREPU; Sep 23, 2022 at 06:12 PM.
Thanks, I was gonna weld over the indentation that the brake shoes made and grind it flat. I'm just wondering if being locked into those groves that were made over time, prevents the shoes from needed movement.
I'm sure the metal is very thin, that's why I thought about welding over the grooves. I doubt it's going to get much more wear since I don't drive but about 1500-2000 a year.
Depending on how deep the dgrooves are you can use an abrasive scotch brite disc on a die grinder and smooth the points out. Those are the contact and pivot points for the brake shoes. Once they are clean and flat you'll want to apply a small amount of grease to each point to facilitate easier movement of each shoe and to prevent the shoes from sticking on the backing plate.
I was able to drop a few welds an grind them smooth down to 600 grit paper.
Brakes are all back together, bled and driven. They work well, but I'll readjust after I put some miles on it.
One thing I never really thought about, how are the rear drums centered on the axles? Up front, there's the hub, but nothing on the back, except the lugs and little screws. Both of which have some play in them.