Mystery wheel squeak

[dan1w]

S211.

One of my rear wheels has been squeaking, sounds like brake squeal but it's there when not braking and dissappears when you do.

Took the wheel off to investigate today thinking the pads would be low but they look okay. It's hard to get the wheel to make the noise but every now and then when I turn it it lets out a sound similar to running your finger arouns the rim of a wine glass.

It doesn't seem to be coming from the caliper area, more the top of the disc or even the hub. It seems more likely to make the sound when I turn the disc applying sideways pressure. The surround behind the disc isn't making contact with the disc.

Also, my parking brake is a bit clunky. The pedal doesn't go down smoothly. Could something have gone ping on the parking brake mechanism?

 

[dan1w]

Well I think I've answered my own question. Applied the parking brake and the wheel in question still spins freely.

Anyone know if this is likely to be down to something in the mechanism in the hub or a broken or maladjusted cable somewhere?

 

[00slk]

Check the retaining springs for the brake shoes, I had one of the springs just touching the wheel bolt, took a bit to suss out. Pull the hub off and have a look?
Wheel bearing?

 

[LostKiwi]

Could also be parking brake lining detached from shoes.

 

[dan1w]

Had the disc off now after much grief with a rounded bolt.

The shoes aren't sitting flush and the bottom one is jutting out and worn on one edge.

Never worked on a parking brake. How are these supposed to sit flush? They're only supported on one side.

 

[dan1w]

Looking at pictures it seems there are supposed to be two springs that kind of screw the shoes down to hub, is that right?

Found one spring in the disc, so I suppose I better put it all back together and get a new spring tomorrow.

 

[LostKiwi]

There is a spring retainer to pull each shoe back against the backplate and two more springs to pull the shoes together when the brake isn't operated.

 

[mioba]

If your not experienced with brakes get it done by a pro. Albeit a parking brake

 

[dan1w]

I'm fine with brakes and working on cars in general, I haven't paid a mechanic in over a decade unless he has a computer I don't. I've just never had a need to work on a parking brake mechanism. I understand how it all goes together now. I the took the shoes off and refitted them.

Thanks for all the input, found the other spring hiding in there as well, both springs broken. Two new ones on order.

 

[joderest]

its worth replacing the shoes at the same time on both side so as you do not have to do the job again, they are known to de laminate with age, they are not expensive. I have to do this on my ML very soon, just waiting for shoes to arrive,as mine fell apart and are in there under a temp fix

 

[00slk]

Yep, springs, I was right......Makes a change