JoelP
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| posted on 4/9/09 at 05:33 PM |
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getting pistons back into callipers
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.
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blakep82
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| posted on 4/9/09 at 05:45 PM |
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sierra calipers? you need to wind the piston back in
grinder spanner thing fits i hear
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Mr G
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| posted on 4/9/09 at 06:00 PM |
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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]
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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turbodisplay
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| posted on 4/9/09 at 06:05 PM |
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G clamp worked wonders on my celica caliper
Darren
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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BenB
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| posted on 4/9/09 at 06:12 PM |
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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.
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Johneturbo
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| posted on 4/9/09 at 06:44 PM |
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angry grinder spanner does the job!
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Liam
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| posted on 4/9/09 at 07:27 PM |
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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]
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mediabloke
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| posted on 4/9/09 at 08:00 PM |
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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
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JoelP
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| posted on 4/9/09 at 08:39 PM |
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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!
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rusty nuts
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| posted on 4/9/09 at 08:50 PM |
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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.
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JoelP
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| posted on 4/9/09 at 08:52 PM |
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cheers bud!
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JoelP
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| posted on 4/9/09 at 09:45 PM |
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nice  the g clamp did the trick!
Thanks for the help!
One corner down, 3 to go 
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blakep82
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| posted on 4/9/09 at 09:57 PM |
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quote:
Originally posted by JoelP
good guesses, but its vivaro fronts! You should know im not building at the min
my mind reading must be a bit off today
glad you got them sorted
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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britishtrident
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| posted on 5/9/09 at 06:53 AM |
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quote:
Originally posted by JoelP
nice the g clamp did the trick!
Thanks for the help!
One corner down, 3 to go
Never force the pistons back on calipers with built in handbrake mechanism ! it knackers the self adjusters.
To get the pistons to go back you either have to take the lid of the master cylinder or (preferred method on ABS systems) clamp the hose and open a
bleed nipple a little.
On Sierra syle rear calipers use a combination of turning and pushing back, Front calipers pistons should lever back quites easily -- if they
don't the caliper needs overhauled.
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gavin174
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| posted on 5/9/09 at 09:33 AM |
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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..
http://www.essexkitcarclub.com
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BenB
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| posted on 5/9/09 at 11:45 AM |
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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...
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JoelP
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| posted on 5/9/09 at 02:08 PM |
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by clamping, i assume you mean flat? Seems odd after the care i took not to kink it!
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