Rear brake piston setting up.

L

Lister John

New Member
Hi All

I am on the rear calipers now and the pistons are wound in, so when I put the existing pads in will I have to wind the pistons out to compensate for the wear on the pads?

Am I right in saying this is what the piston setting tool is for?

I dont have the tool and the diff is on the bench, so will it be ok to wind the piston out with a scewdriver? and how much gap should I leave please?

Thanks in advance and if you have any pics of doing this I would appreciate it

Cheers for now...John
 
Hi
The tool is to wind the pistons in with the calipers fitted .If they are off you can wind then in with whatever you like
I would say wind the pistons out so the pads just fit or you'll be using the handbrake a lot to get it to self adjust
 
Thanks for the reply, I have the diff removed to do this job and a small bit of welding on the bump stop mounts at the same time

Cheers..John
 
Bring the pistons back out by operating the handbrake quadrant on the caliper. You should do this with the disc out, and take it up until with the quadrant released the disc just slides in between the pads nicely. If you do it with the disc in there you'll never get a good handbrake.
 
Hi, I will do this tomorrow hopefully, basically I need the same amount of clearence as on the front discs? ...So the disc almost touches he pads (like when the brake pedal is released after braking)

Thanks
 
Hello John,

In the case of the front and rear pads, contact with the discs is never lost. The front pads don't move away from the discs when the pedal pressure is released, rather the pressure that was being applied to them is removed. The rear calipers have the location of one pad fixed, and the caliper swings as the pads wear. You can see this by looking at the shape of new pads as opposed to old.

Ron.
 
Hi, i 100% totally agree with HarveyP6 on using the handbrake lever on the caliper to actuate the self adjuster & taking all possible free play out. (disconnect handbrake linkage pivot pin at the caliper first to make life easier). This method gives you a better feeling pedal & a better handbrake. The movement of the piston is marginal at the best of times, so any excess free play between the pad & disc will affect braking effort & pedal movement. An alternative to doing this with the disc removed is to remove the smaller brake pad (disc fitted), work the handbrake lever to move the adjuster and try to refit the pad. Keep going on the handbrake lever (a click at a time) until you can just insert the pad without binding.
Glen :twisted:
 
DaveHerns said:
Doesn't what I suggest have the same effect and save wear on the self adjuster ?
Click to expand...
It does indeed, but they're pretty hard wearing :)
I do feel for the little teeth though :( Kind of hurts my ears like hearing people yank up their handbrake so you know how many clicks for each neighbours car :LOL:
 
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