Some advice on a sticking brake required please.

[chipperhead]

My offside rear wheel is not spinning freely, I noticed the other day whilst driving it and after I stopped there was some heat coming from the wheel.
Normally if anything goes wrong I take it straight to a mechanic but I thought I may just have a quick look myself as I thought it may just need a quick strip, clean and copper grease.
I jacked and chocked the car and the wheel was indeed very difficult to spin, after I (eventually) removed the wheel I was confronted by the image below.

I presumed the next step was to unscrew bolt 'A' however the rubber cover 'B' started to twist so I put a spanner to hold nut 'C' then started to undo bolt 'A' again, this seemed to do the trick as the rubber didn't twist.
At this point I realised I wouldn't have enough time to go much further so tightened it back up and put the wheel back on.

Is this the right procedure and any tips on freeing it up?

Cheers

 

[Jamous]

Inside "B" is the slide on which the caliper moves on as the pads wear.
You were correct, to remove the caliper yuo need to hold "C" with a spanner while undoing "A".
once removed, the pads themselves may be siezed in the caliper or teh caliper piston may be siezed.
but being brutal mate, if you need to check how to remove the caliper you may be best getting someone to look at it for you, they are your brakes after all...

 

[chipperhead]

Inside "B" is the slide on which the caliper moves on as the pads wear.
You were correct, to remove the caliper yuo need to hold "C" with a spanner while undoing "A".
once removed, the pads themselves may be siezed in the caliper or teh caliper piston may be siezed.
but being brutal mate, if you need to check how to remove the caliper you may be best getting someone to look at it for you, they are your brakes after all...

Thanks for that, I appreciate what you're saying about not even knowing how to remove a caliper but I've never removed one before, I'm fairly respectable with tools and I'll only do what I'm 100% happy with.

 

[Fuzz]

Yes, correct procedure, only need to undo the bottom one though and swing the caliper up to get at brake pads, remove them (checking they are not the seizure) lower the caliper back down and now move caliper left to right to check if the sliders are seized.
Last stop will be checking the piston itself. one of them will be seized, if it's the piston, buy a new caliper, ain't worth the agro trying to un-seize it for it to last a month or so.
Sliders are a bit more forgiving.

 

[Jamous]

....... but if the brake is sticking as in OP you will need to undo both slides to remove the caliper to find the problem.

Also, if you undo the bottom bolt you may find there won't be enough free play on the handbrake cable to swing the caliper up, if you only remove the top bolt then the hose can stop you swinging the caliper.
Just remove both bolts it's easier.

It's a standard Girling type caliper, so easy enough to work on.

It may also be the handbrake mechanism or the cable itself, so watch the mechanism as someone operates the lever inside.