locoboy
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| posted on 27/3/04 at 06:08 PM |
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Pug 306 HDI Brakes
Calling all pug owners.....
Set about changing the rear disks on mates car this morning, bendix floating single pot calliper affairs.
Dead easy to get the pads out but i couldnt get the piston back in to allow enough room for the new pads.
I unhooked the handbrake cable from the lever on the calliper, still didnt make much difference.
I used a G Clamp too and that didnt shift it.
I even undid the bleed nipple and tried to g-clamp it, the fluid just dripped out, it didnt speed up or squirt when i applied the pressure with the
clamp, Why not?
I ended up kind of hammering it back enough to take the new pads, the disks will need replacing in the next few months and today there wasnt enought
room to fit new pads and new disks, but when i change the disks i want to put new pads on again.
Is there a part of the procedure i missed out or was it just a sticky piston (both sides were the same) I cant think of anything i missed out or could
have undone / removed to make it easier.
Its got ABS too if that makes a difference.
Anyone got any advice...............apart from take it to a dealer 
[Edited on 10/12/04 by colmaccoll]
ATB
Locoboy
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nicklondon
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| posted on 27/3/04 at 07:18 PM |
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i think some pistons screw out as pads wear and have to be screwed back in for replacement but i mite be wrong.
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phil
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| posted on 27/3/04 at 07:24 PM |
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if they are like citroen brake calipers that also incorperate a hand brake, the piston must be wound back into the caliper(clockwise). one of the pads
will have a raised notch on the side that fits in to a cut out in the piston side, hope that helps you.
phil.......
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phelpsa
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| posted on 27/3/04 at 08:15 PM |
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I recon they will be the same as the citroen calipers, as most things are the same (engines, hubs, mechanicals).
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theconrodkid
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| posted on 27/3/04 at 10:01 PM |
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you need to screw the piston in as you push,medium swan necks if you havnt got the right tool
who cares who wins
pass the pork pies
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locoboy
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| posted on 28/3/04 at 01:09 AM |
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whats a swan neck?
and will i have fucked it by bashing it a few times?
Phil, 2 out of 4 of the pads had a raised notch but when fitted in the calliper the notch didnt reach the recessed + in the piston face so i didnt
think it was of any significance.
hope i hanvt buggered the bloody things
ATB
Locoboy
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phil
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| posted on 28/3/04 at 07:03 AM |
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the peg needs to sit in the cut out of the piston(on my citroen there are four notches but only one is used, it has a line
stamped under it. the other notches are there to help you wind the piston back in.)
You may need to turn the piston to line the notch up with the peg of the pad.
cheers phil
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theconrodkid
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| posted on 28/3/04 at 07:34 AM |
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swan necks are like big waterpump pliers,best to get the right tool as its cheaper than buying new calipers,just hope you havnt broken them
[Edited on 28/3/04 by theconrodkid]
who cares who wins
pass the pork pies
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Ben_Copeland
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| posted on 28/3/04 at 08:11 AM |
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Hammering them back in... would not of done them much good. We have the right tool at work. You might be lucky, but sounds like you might of buggered
them.
Ben
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locoboy
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| posted on 28/3/04 at 10:42 AM |
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Handbrake works ok and they dont bind when the callipers are used and released,
Why would the lump on the pad need to go into the piston slot, surely this would mean the piston wouldnt be able to wind its self out to the corret
place to take up pad wear a spiral fashion?
ATB
Locoboy
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Ben_Copeland
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| posted on 28/3/04 at 10:49 AM |
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If thats the way it works by spiralling out.. then i would expect the open face with slot would turn separate from the piston, thus meaning the open
face stays in one place... not really played with peugoet rear brakes, so that was a bit of a guess
Ben
Locost Map on Google Maps
Z20LET Astra Turbo, into a Haynes
Roadster
Enter Your Details Here
http://www.facebook.com/EquinoxProducts for all your bodywork needs!
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theconrodkid
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| posted on 28/3/04 at 02:18 PM |
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inside the piston looks like a swiss watch,as the piston is pushed out the mechanism winds out on a screw,thats why you have to wind them in,ps dont
try to take it apart
who cares who wins
pass the pork pies
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locoboy
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| posted on 28/3/04 at 02:48 PM |
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Still dont understand how the piston can turn out whan the notch is engaged on the pad?
Also the pads i took out didnt have a notch on them, is it vital to have it?
ATB
Locoboy
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theconrodkid
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| posted on 28/3/04 at 02:57 PM |
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the piston dosnt turn going out,the reason for having all the mechanism is for hand brake adjustment,pads should have a notch to stop piston
turning,pump it up on the foot brake before trying handbrake as well
who cares who wins
pass the pork pies
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ChrisW
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| posted on 28/3/04 at 03:07 PM |
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Going down to the garage in a bit Col so I'll dig out the Haynes book of lies and see what that says about Pug rear calipers. Might have some
pictures to help Conrod's explanation!
BTW I did rear pads and discs on my Cabrio and don't remember any problems which either means the calipers went back easily or the handbrake
mechanism was self explanatory!
Chris
[Edited on 28/3/04 by ChrisW]
My gaff my rules
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locoboy
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| posted on 28/3/04 at 04:59 PM |
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Cheers Chris, would appreciate the haynes input.......
maybe im just being a thick twat
Conrod, Will it cause a problem if the piston wants to turn on the way out because the notch isnt located in the piston?
[Edited on 28/3/04 by colmaccoll]
ATB
Locoboy
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theconrodkid
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| posted on 28/3/04 at 05:21 PM |
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probly mean the handbrake wont adjust up
who cares who wins
pass the pork pies
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