Another front drum / brake problem

Vin-tin

Vin-tin

Well-known member
So i'm down to my last corner of the new brake / drum installation.
I have a problem with the one front brake drum rubbing as I spin the hub. I discovered it's rubbing on the outer edge of the shoe(s). I sanded the lining flush with the edge of the metal bands and it's still rubbing.
I can eliminate the rub completely if I back off on the spindle nut, but then the hub has in and out play.
Would it be advisable to shim-out the inner wheel bearing race?
and if yes, do they make something specifically for that?

I thought it would be best to shim the race, rather than the bearing.

How else would you fix this?
 
I would grind down the metal part of the shoe if that is what is hitting on the inner drum.
Make sure ( I am sure you checked) the shoe is firmly planted against the backing plate.

Could be some crud holding the shoe away from the backing plate.
 
Ed H. said:
I would grind down the metal part of the shoe if that is what is hitting on the inner drum.
Make sure ( I am sure you checked) the shoe is firmly planted against the backing plate.

Could be some crud holding the shoe away from the backing plate.
Click to expand...

No crud. Everything was blasted and painted.
I can push the shoes towards the backing plate, but the shoe springs pull it away again slightly. I figured that's normal as you don't want the shoes contacting the backing plate...?
 
180 a said:
check to see if the drum has the radius relieved so the shoe does not hit that radius
Click to expand...
It does look as though they could have machined a little deeper to remove more of the radius.
I shimmed-out the bearing race about .010-.015. Now it only rubs ever so slightly. I can live with that. It will probably get better as it wears-in when I get the chassis on the road (some day :rolleyes:)
 
My suggestion:
Grab yourself a spray can of paint and give the inside of the drum a squirt. Refit everything and give the drum a turn. When you dismantle and inspect, you'll easily see where it is rubbing. Relieve it and retest. Repeat as many times as is needed to get the drum turning freely. This way, you'll only be removing the minimum amount of material.
 
The shoes should rest against the backing plate. If the springs pull them away, then something is wrong. I also put a touch of grease on the spots where the shoes rest against the backing plates.
 
I agree with Tom & Synchro. Shimming the bearing is not a good idea. That could promote the inner race turning and wear axle.

John
 
Vin-tin said:
No crud. Everything was blasted and painted.
I can push the shoes towards the backing plate, but the shoe springs pull it away again slightly. I figured that's normal as you don't want the shoes contacting the backing plate...?
Click to expand...

Later cars have spring and washer holding shoe against the backing plate. I would make sure there is a little pressure on the shoe towards the drum.
 
I'm with Tom and Synchro. I don't recall ever doing a brake job with the shoes being pulled away from the backing plate that has worked out well.
There is usually a raised pad on the backing plate that is lightly greased and the shoes ride on that pad.
interested to see what you find that resolves the issue. I also agree with NOT spacing the bearing out... band aid for another problem IMO
 
had the same problem and found that it was not the shoe dragging but the outside edge of the drum was rubbing on the outer flange of the backing plate. I had .088" machined from the outside edge of the drum and it works fine. Outside edge: I mean if you look at the surface of the drum that the shoes fit into then it is the outer edge (90 degrees from the brake surface)
 
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