Brake problems with 2007 Volvo V70

[Kira]

I've a 2007 Volvo V70 FWD base model. It has parking brake shoes in a "high hat" which is cast into the rear rotors.
I applied the parking brakes while rolling down my short drive and into the street and got huge crunching.
I thought brake material and more severe damage.

Got her back in the drive and now I cannot budge the rotor off.
It revolves a bit in either direction, but the broken parts quickly jam any attempt to revolve the rotor.
The shoes are worn, and the system cable is slackened.
Is it slide hammer time?

 

[Mechanician]

A rubber mallet against the drum/disc may be a better start.
Start trying to get the parts to jump into a less binding position while trying to rotate the disc.

 

[Kira]

Shot a little Kroil (penetrant) at the hub/rotor interface, not much.
I've been rhythmic in my tapping.

 

[Jetronic]

did you try to slacken the adjuster? The cable doesn't need touching if it's not that one that's stuck

 

[Astro14]

Brake shoe delaminated. Now it’s jammed.

Be careful with using force. Slacken the cable completely at the parking brake handle - gently pry up the trim and use a 10mm open end wrench.

Try rotating the disc 90 degrees to free up the hardware from the jammed debris.

You will likely break the shoe retaining springs to get this apart. Too much force and you will break their mounts. Which requires new backing plates.

Get a hardware kit before proceeding further, you’ll need those springs.

 

[Number_35]

Can you grab the pins (that hold the parking-brake shoes in place) from the back and cut the end off?

That might let the shoes flop around enough to stop them binding.

 

[Astro14]

Shot a little Kroil (penetrant) at the hub/rotor interface, not much.
I've been rhythmic in my tapping.

Not going to make a difference.

 

[Astro14]

Can you grab the pins (that hold the parking-brake shoes in place) from the back and cut the end off?

That might let the shoes flop around enough to stop them binding.

No. They’re held on with springs that fit into stamped brackets on the inside of the backing plate.

 

[Delta]

Brake shoe delaminated. Now it’s jammed.

Be careful with using force. Slacken the cable completely at the parking brake handle - gently pry up the trim and use a 10mm open end wrench.

Try rotating the disc 90 degrees to free up the hardware from the jammed debris.

You will likely break the shoe retaining springs to get this apart. Too much force and you will break their mounts. Which requires new backing plates.

Get a hardware kit before proceeding further, you’ll need those springs.

This. Unfortunately it's probably going to be a forceful removal process and all the hardware and pads will be needed for the parking brake assembly.

Also a good reason to frequently exercise the parking brake!

 

[Astro14]

This. Unfortunately it's probably going to be a forceful removal process and all the hardware and pads will be needed for the parking brake assembly.

Also a good reason to frequently exercise the parking brake!

Doesn’t help to exercise it, in this case.

The shoes are known for delaminating.

So, exercising it, a good idea, doesn’t prevent delaminating of the shoes.

 

[Chris142]

you need to back off the adjuster

 

[Astro14]

you need to back off the adjuster

He said he did, but I agree - ensure that it is completely backed off.

 

[John105]

A rubber mallet against the drum/disc may be a better start.
Start trying to get the parts to jump into a less binding position while trying to rotate the disc.

Agreed. On my ls430 I stupidly forgot I had set the parking brake and I was able to yank the rotor off, ripping the components off as well….it would seem the rotor can in fact be removed even with a fully functional parking brake set

 

[sloinker]

The worst emergency brake design ever! IMO, Good Luck!

 

[Kira]

Yup, to all of you.
I know the layout and fear the destroyed backing plate.
One of the retention springs actually exited the backing plate. It was lying there with a hunk of backing plate.....my heart sank.
Re lube/heat: The contact zone is a universal place to apply anti-seize. It washes away and rust can take hold.
I'll let the Sun go down a bit before continuing.

Still plenty of service brake left but I'll gladly trash these rotors to be able to continue the job.

 

[Donald]

did you try to slacken the adjuster? The cable doesn't need touching if it's not that one that's stuck

+ 1 - slacken the adjusters.

Do you use parking brake on regular basis?

I have had a similar situation where I could pull the rotor out a little but something was holding it back and it would not come free.

 

[Kira]

The cable is slackened completely.
I cycle the parking brake quite regularly because I know the inadequacy of the parts.

FYI: I bought this vehicle 7.5 years ago. Its brakes were in top shape.
The genuine Volvo parking brake shoes grabbed like old fashioned contact cement.
Within three months, the parking brakes were every bit the true joke everyone knows them to be.

Guess that borough:
If it was 30 years ago, I'd pay a local businessman to do these brakes while attending a ball game.

 

[Jetronic]

The cable is slackened completely.
I cycle the parking brake quite regularly because I know the inadequacy of the parts.

FYI: I bought this vehicle 7.5 years ago. Its brakes were in top shape.
The genuine Volvo parking brake shoes grabbed like old fashioned contact cement.
Within three months, the parking brakes were every bit the true joke everyone knows them to be.

Guess that borough:
If it was 30 years ago, I'd pay a local businessman to do these brakes while attending a ball game.

There's an adjuster in the drum that needs slackening. Slackening the cable does nothing if that was adjusted properly before. Don't ever adjust the cable to compensate for wear either.

 

[Astro14]

There's an adjuster in the drum that needs slackening. Slackening the cable does nothing if that was adjusted properly before. Don't ever adjust the cable to compensate for wear either.

That is absolutely not the case in the OP car. The only adjustment is done at the handbrake. There is no adjustment in the brake itself.

Here is a look at the parking brake in a P2 Volvo, from last month, when I did a rear wheel hub on the XC-90.

You can see the small retaining springs holding the shoes in place.

You can also see that there is no adjuster in the brake itself - slack and adjustment is all taken up at the handbrake.

There is a 10mm nut on a threaded rod at the handle on his car - an adjustable linkage under the console by the driver’s right ankle on the XC-90

 

[Kira]

THIS JUST IN:
I'm adding this development to my two-day old thread.
I'll be brief.

I mistakenly bought ventilated rotors for this V70. They're ~1" thick.
The solid rotors on the car are ~1/2" thick.
Q: Can I use the ventilated rotors on my car? The answer depends on whether the caliper can go wide enough, I suppose.
The overall diameter of 288mm matches.
Anybody know?


STORY:
During a garage clean-out years ago, I was given all the new, unused parts a fellow had abandoned.
The receipts were there, and I used the credit plus some cash for parts for my own car. I never visually checked the parts I bought.
Call it an oversight as I'm not the 'careless type'.