11 replies to this topic

[stevelane]

Can't find anything that matches this on the forum so sorry if I do cover any old ground

Recently changed my two rear brake cylinders and when putting the drums back on they are both rubbing on the back plate.

It's not the brakes themselves, they are adjusted right off at the moment and there is no resistance in the hub/drum turning, just that it rubs in the back.

I've double checked the torque on the hub nuts and that seems ok

It is possible that they rubbed before without me noticing and it has been a while since the car was on the road.

Anyone know what adjustments I can make to stop it happening or shed any light on reasons?

[filski]

If the hub nut torque ok then i got silly question did you fit the shoes back on the right way? As in did you put the springs the same place etc (i know as they can rub sometimes)

 

1) If not that then I had problem with the adjuster screwed right in so loosen that up all the way,

 

2) If not that it may help to put some break cleaner on the shoes and the inside of the drum

 

3) if not that then i have no idea, some one more knowledgable will be able to assist.

[stevelane]

The springs were rubbing and I adjusted that do that the hubs turn freely with out noise but as soon as the drums went in you could feel it touch the backplate where there is a slight lip overhanging

[stevelane]

No one have any thoughts on this?

[filski]

So the actual brake drum is what catching on the back plate?

 

if so and its not ver loud as in just brushing sound then I woldnt worry about it. As long as your hub nut on and torqued + split pin incerted and the breaks are adjusted, you should have no problem.

 

I think the sound will go away as the back plate is designed to have the drum sort of sink in to it but if the back plate is old/ new it may be just alittle tight round edges. I may be of course corrected on this, but in my view as long as you wheels are on and the brakes are working thne there is no issue. unles the noise is soo loud that ou can her inside of your car.

 

hope that helps

[A-Cell]

Can you see any witness marks on the brake backplate where it may be rubbing?
Is there excessive corrosion on the lip of he brake drum, this effectively makes the drum 'grow' (ferrous oxide is bigger than iron! That's why you get rust bubbles). It is possible for the backplate to be deformed slightly and needs to be gently reshaped to stop the rubbing. Ie tapped with a hammer. I have also seen bent back plates especially at the bottom when presumably they have had a jack put under them to lift radius arm up to replace damper.

[stevelane]

Thanks

Not driven the car for a while but would doubt very much that you'd hear it inside the car.

I was of the same opinion that as long as the brakes and hub were ok that it should be safe but as a relative novice I like to double check

[A-Cell]

May even just be a build up dirt and or rust. You should see any rub marks in the dirt! Give it a good clean first. You are right to check it out. Not meant to rub, but if only very slight it won't do any real harm. Nice to have things right though. Good luck.

[stevelane]

Makes sense about dirt or rust as the car has been standing for a while, will give them both a good clean and see if that makes any difference, thanks

[filski]

Good luck buddy =)

[stevelane]

Thanks guys, gave them a real good clean up and seems a lot better, still a slight noise but nothing you would notice

[A-Cell]

Glad it's sorted! Happy mini-ing.