any techniques, or just force it? Pad fell out so the pistons are well out. Googling now but thought id post here as well in case someone knows faster than google!

Cheers.

sierra calipers? you need to wind the piston back in

grinder spanner thing fits i hear

same question only asked a little while ago! search really is your friend! you need to put pressure on them when winding them in btw. I'm also assuming its rears as you should'nt have any trouble with the fronts.
cheers

G


[Edited on 4/9/09 by Mr G]

G clamp worked wonders on my celica caliper
Darren

A wind back tool is a good investment. If you start using mole grips etc you can rip the rubber thiny leading to grip and rubbish getting into the brake cylinder leading to scoring.

angry grinder spanner does the job!

As above if they're rears. If you can't return front caliper pistons by hand your brakes aren't in tip-top condition. You're somewhere along the path towards siezed pistons or flexi lines breaking down and closing up, and the resulting binding brakes.

EDIT: I was assuming the locost/toy car with no ABS

[Edited on 5/9/09 by Liam]

If it's just a pads-width, you could try taking the reservoir cap off and prising it back with a block of wood. Made a similar mistake on SWIMBO's old Fiesta a good few years ago - same calipers IIRC - and they went back in no problem. Whilst it's out, I might be tempted to push the rubbers back & clean the top edge where it tends to bind when the pads are new.

If piston & caliper have parted company, you'll need to pop it in some brake fluid to get it back in...

HTH - Francis

good guesses, but its vivaro fronts! You should know im not building at the min

The pad went tumbling down the road, and the piston got a touch scored on the disc. Its out far enough that it wobbles. Im going to loosen off the bleed nipple due to the ABS, and have a go with the G clamp. I managed on the sprinter with a quick clamp but that wasnt powerful enough for this.

If they have popped out past the seals, do i just need to lubricate it with some brake fluid?

Cheers!

As you say loosen the bleed nipple , then press the piston back into the bore but it needs to go back in squarely . If it doesn't go back in then you may have the piston jamming on the seal in which case clamp the brake hose , remove the piston and make sure the seal is fitted correctly in it's groove , lubricate piston and gently insert so it passes the seal. It would make sense to replace the caliper seals if you can get a repair kit. If all else fails then check out the cost of a recon caliper.

cheers bud!

nice the g clamp did the trick!

Thanks for the help!

One corner down, 3 to go

quote:

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Originally posted by JoelP
good guesses, but its vivaro fronts! You should know im not building at the min

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quote:

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Originally posted by JoelP
nice the g clamp did the trick!

Thanks for the help!

One corner down, 3 to go

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if it has abs make sure you remove the keys from the ignition..

some systems self test and push something like 100lbs per square inch through the piston, and if your fingers happen to be betwwen the piston and the disc...

well you know the rest..

Clamping the hose and opening the bleed nipple then using a wind back tool is my preferred approach. With a bit of care they hardly need bleeding afterwards...

by clamping, i assume you mean flat? Seems odd after the care i took not to kink it!