Would you reuse this rear brake drum?

Status
Not open for further replies.
Any one else notice the spiral tool mark where the lathe operator just backed the Z axis out without moving the X?
 
Saw it and kept my council.

Had to think for a sec because was still contemplating the cam lobe thread.
 
jbruney said:
Saw it and kept my council.

Had to think for a sec because was still contemplating the cam lobe thread.
Click to expand...
If I was poor ( as in my very early motorbike days... ) I would have looked more at the sprocket teeth meat than the interior brake surfaces. Let's be honest , the rear drum brake is not up to the job without $pending. Buy new.
 
Pretty sure the somewhat blurry image is depicting the heat checking (cracking) axially in several places.
 
The right face of many of the teeth look like they have a consistent wear pattern to me.
 
I used dye penetrant on the suspect area of the drum:

After 10 min:
Would you reuse this rear brake drum?

After 15 hours:
Would you reuse this rear brake drum?

Going in the scrap bin.
 
That sprocket is smoked.
It will wear the chain FAST, which wears the front sprocket. Unless you're planning on only 100 parade miles per year, in which case, it'll last a while.
Would you reuse this rear brake drum?
 
Be aware, the replacement I got was poor quality, the staking of the drive lugs was incomplete/random, and the protrusion was too high. I had to peen, and grind to make it work.
Inspect carefully the new part.
 
NickZ said:
Meaning that as I rotate the rear wheel while lightly pushing on the brake pedal, I can feel friction for part of the wheel revolution and no friction for the rest.
Click to expand...
The consensus is to change it. I agree.

Focusing on a part of what you said, it sounds like the rear brake was not applied while tightening the dummy or one-piece axel (whichever you have). I would install new shoes and a new drum and it's important to centralize the shoes/brake plate while tightening the axel.
 
marshg246 said:
The consensus is to change it. I agree.

Focusing on a part of what you said, it sounds like the rear brake was not applied while tightening the dummy or one-piece axel (whichever you have). I would install new shoes and a new drum and it's important to centralize the shoes/brake plate while tightening the axel.
Click to expand...
Did all that. Much better now. Brake applies evenly now, but still have occasional squeal.
 
NickZ said:
Did all that. Much better now. Brake applies evenly now, but still have occasional squeal.
Click to expand...
Leading edges might need a little more relief (bevel), you may have the brake adjusted slightly too tight, or the brake not fully releasing - all assuming the squeal is when not breaking. If it happens when braking, I would take it back apart and clean very well to remove any grease or oil and sand lightly - you may be starting to glaze.
 
Status
Not open for further replies.

Similar threads

D
  • Locked
Would you reuse these connecting rods?
Replies
15
Views
1,725
ashman
ashman
Back
Top