[Brakes] Binding rear brake.

[evdama]

Had an mot advisory three years ago regarding a stuck nearside caliper
Not binding as such but not willing to release immediately from the handbrake.
It popped itself free after a few yards.
Following year no advisory until it reappears then goes away again
I begin periodically freeing and regreasing the pins which keeps it in check.
The pads had worn down very unevenly as a result.
Time for a change .
With the disks and bearings still fairly good I opted to only change the pads.
However...





So I put new calipers pads,pins shims etc.
Bled nicely and working well.

However couple of weeks later the nearside is binding- hot compared to cool on the other side and the front disks..
Jacked up the body and I could barely rotate the wheel.

Pulled it apart again- check the pads weren't sticking 
Made sure the pins weren't over greased and causing themselves hydraulic lock.
Caliper glides freely.
Reassemble.
Wheel now spins with a little pad friction.

But last week it's binding again and the fuel consumption is up.

This morning I'd had enough and jacked it up ready to tear it apart again -but it's perfect.
I got the OH to sit in the car and operate the handbrake and the pedal while I spinned the wheel and it's all ticketyboo.

What could it be?
The discs seem true to the eye and bearings run silent.
The only other old part left is the carrier - it was the same side as the original issue but the new pins move orgasmically in it.

I thought it might be the new pads being reluctant to being  rammed into the old ones 'trenches'-possible but why only the nearside?
The handbrake cable moves freely both ways
I thought if it a free with th the body jacked up and binding when it's down it might be the cable routed badly but it's relaxed when back down on the tarmac and it's never been disturbed before other than replacing the calpers.

At the moment theres an uneasy truce .
I've just ragged the van around a deserted car park like a teenager and it's all fine.
Grateful for any ideas if it reappears?

[Multispacer]

Had an mot advisory three years ago regarding a stuck nearside caliper
Not binding as such but not willing to release immediately from the handbrake.
It popped itself free after a few yards.
Following year no advisory until it reappears then goes away again
I begin periodically freeing and regreasing the pins which keeps it in check.
The pads had worn down very unevenly as a result.
Time for a change .
With the disks and bearings still fairly good I opted to only change the pads.
However...





So I put new callipers, pads, pins shims etc.
Bled nicely and working well.

However couple of weeks later the nearside is binding- hot compared to cool on the other side and the front disks..
Jacked up the body and I could barely rotate the wheel.

Pulled it apart again- check the pads weren't sticking 
Made sure the pins weren't over greased and causing themselves hydraulic lock.
Calliper glides freely.
Reassemble.
Wheel now spins with a little pad friction.

But last week it's binding again and the fuel consumption is up.

This morning I'd had enough and jacked it up ready to tear it apart again -but it's perfect.
I got the OH to sit in the car and operate the handbrake and the pedal while I spinned the wheel and it's all ticketyboo.

What could it be?
The discs seem true to the eye and bearings run silent.
The only other old part left is the carrier - it was the same side as the original issue but the new pins move orgasmically in it.

I thought it might be the new pads being reluctant to being  rammed into the old ones 'trenches'-possible but why only the nearside?
The handbrake cable moves freely both ways
I thought if it a free with the the body jacked up and binding when it's down it might be the cable routed badly but it's relaxed when back down on the tarmac and it's never been disturbed before other than replacing the callipers.

At the moment there's an uneasy truce .
I've just ragged the van around a deserted car park like a teenager and it's all fine.
Grateful for any ideas if it reappears?

Could it be that the carrier has got so hot [when it seized] that it has actually gone out of shape? Or has that wheel had a 'severe belt' by either going up a kerb or down a pot-hole to push the carrier out of shape?

While this may seem unlikely, I had personal experience, while travelling as a passenger [in my son's VW Polo] he lost control of it as it aquaplaned and he hit a kerb with the front wheel [at a relatively low speed] but he managed to actually mis-shape the brake carrier. That took me a while to figure out exactly what was wrong after a changing a number of other components on that wheel for brake binding. We eventually replaced the carrier and all was good and honestly, we we had the old one out and compared it to the new one they didn't look any different to the naked eye but it was obviously misshapen enough.

[brodfather11]

Flexible rubber pipe inners ok?.

Heard of one having a flap/rip/separation in the inner pipe that acted like a valve occasionally.

Not very common though .

[shtu]

As a starter, I'd have a look at the handbrake cables and make sure they are OK, and also how to adjust the cables correctly.

On Mrs_Shtu's Polo, a garage massively over-tightened the cables, which meant the self-adjustment didn't work properly, and one of the calipers would intermittently seize up.


https://www.berlingoforum.com/thread-26010.html

[evdama]

The truce seems to be holding but there's some good ammo if it resurfaces thanks chaps

[geoff]

Hydraulics -

If the wheel is tight to turn when jacked up go to the bleed nipple

Slacken for a second and retighten, may get a small squirt of fluid

Now try turning the wheel and if now free to turn you’ve honed in on the problem and been able to discount lots of things.