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Refurb of rear brake callipers #1637925
04/01/2020 15:49
04/01/2020 15:49
Joined: Sep 2010
Posts: 130
The Netherlands
J
jaaps2 Offline OP
Club Member 1560
jaaps2  Offline OP
Club Member 1560
On a journey
J

Joined: Sep 2010
Posts: 130
The Netherlands
While preparing a repaint of the rear brake callipers, I noticed one of the piston-rubbers is damaged. I happen to have a refurbishment kit.

Does someone know how to remove the piston? For my front Brembo callipers I just used air pressure via a brake nipple and the pistons popped out, but this does not work for the rear brakes.

Second question: there is also a rubber near the lever for the handbrake: between the lever and the housing. This is not included in my kit. Does anyone have experience with replacement and where to buy?

Attached some photo's.

Attached Files
IMG_1719.jpg (105 downloads)
IMG_1718.jpg (110 downloads)
IMG_1717.jpg (109 downloads)

20VT, build in 1997, first used in 1998
https://youtu.be/mI0jZIIBc2w
Re: Refurb of rear brake callipers [Re: jaaps2] #1637926
04/01/2020 16:19
04/01/2020 16:19
Joined: Mar 2019
Posts: 54
North Macedonia
386ka Offline
Reaping the fruits
386ka  Offline
Reaping the fruits

Joined: Mar 2019
Posts: 54
North Macedonia
I think that, because of the handbrake lever, the rear pistons are screwed to a lever in the caliper. That's why you need to unscrew the piston (turning it anti-clokwise?) so it will get free from the lever. That's why there are 4 grooves on the piston surface.

Re: Refurb of rear brake callipers [Re: jaaps2] #1637938
05/01/2020 12:13
05/01/2020 12:13
Joined: Sep 2010
Posts: 130
The Netherlands
J
jaaps2 Offline OP
Club Member 1560
jaaps2  Offline OP
Club Member 1560
On a journey
J

Joined: Sep 2010
Posts: 130
The Netherlands
My Brake-tool only works clockwise (to screw inwards). But its solved. Just repeat using the handbrake lever and finally the piston will be loose.


20VT, build in 1997, first used in 1998
https://youtu.be/mI0jZIIBc2w
Re: Refurb of rear brake callipers [Re: jaaps2] #1638066
10/01/2020 09:32
10/01/2020 09:32
Joined: Feb 2006
Posts: 123
Newbury
MIB Offline
Club Member 1579
MIB  Offline
Club Member 1579
On a journey

Joined: Feb 2006
Posts: 123
Newbury
I bought a full kit, including the pistons from Bigg Red here http://www.biggred.co.uk/brake-caliper-piston-repair-kit-brkp69
This kit includes the rubber seal for the handbrake lever cable.
It also includes some O rings used inside the self adjusting mechanism inside the pistons. This mechanism is very fiddly to remove as there is a difficult to reach internal circlip holding it all in. I used a tiny flat balde jewlers screwdriver to reach down and release the circlip, but it's very frustrating work, and don't break the circlip as they are very, very, very difficult to find!!


[Linked Image]
Bog standard!
Re: Refurb of rear brake callipers [Re: jaaps2] #1638073
10/01/2020 16:46
10/01/2020 16:46
Joined: Mar 2007
Posts: 11,094
Auld Reekie
Edinburgh Offline
Club Board member
Edinburgh  Offline
Club Board member
I AM a Coop

Joined: Mar 2007
Posts: 11,094
Auld Reekie
Yeah, second for the Bigg Red kit


Thanks again, Photobucket.
BumbleBee under restoration, in paintshop!...
Re: Refurb of rear brake callipers [Re: jaaps2] #1638085
10/01/2020 21:18
10/01/2020 21:18
Joined: Sep 2010
Posts: 130
The Netherlands
J
jaaps2 Offline OP
Club Member 1560
jaaps2  Offline OP
Club Member 1560
On a journey
J

Joined: Sep 2010
Posts: 130
The Netherlands
Yes, these would have been great. I allready have the ricambi originali set though. Happy that the rubbers for the levers and the pistons look fine on my breaks.


20VT, build in 1997, first used in 1998
https://youtu.be/mI0jZIIBc2w

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