rebuilding rear calipers

Konstantin Bogach kbogach at comcast.net
Tue Mar 5 00:01:59 EST 2002


Today I did that C-clip on the second caliper.  I took 5 min!  Yesterday I
said to myself: ":You, fool, should've bought new or rebuilt calipers".  It
was a minute of weakness and I am taking those words back.  I still can not
finish assembling calipers because I am still looking for cheaper price for
rebuld kits (boot and piston seal).  If I don't find it tomorrow I will buy
it for $25x2=$50 (almost a rebuilt caliper).

I have a question for people who did it and still remember details. What
size of O-ring (which seals e-brake mechanism from brake fluid) on the
threaded shaft did you use? Shaft diameter is 10mm but 10mm ID O-rings I
bought seem too loose. At least, it is more loose than original O-ring. It
even visually is slightly bigger than the oringinal O-ring.  3/8'' ID (9.5
mm) O-ring is slightly smaller, maybe because it it thiner (1.56 mm against
1.8-2 mm).  Closest metric sizes I saw are 9.1 and 10.1 mm which do not
fit.  Any thoughts?
By the way,  the Ethylen Propylen O-rings should be used in brake fluids.
DO NOT USE Buna-N (Nitrile) or Neopren or Viton O-rings. This is what I
found doing research.  Please, let me know if yuor experience says something
different. For example, you used neoprene O-rings  for years without
problem.

Thank you.

Konstantin Bogach.

Konstantin Bogach.

Konstantin Bogach wrote:

> I spent bigger part of Sunday trying to install C-clip in a rear brake
> caliper. I did  ot 30 min ago and instead of going to bed I tried  to
> finish the job and pierced rubber boot.  Damn!  The second one is about
> to be torn -big crack on both sides. So, I need 2 rebuild kits.
> Cheapest I found is $25 from NAPA (imported from Europe).
> Anyone know better source?
> I am telling you, that c-clip is a big PITA.   I used a big carpenter
> clamp to drive spring retainer down (using deep socket) and than spent 4
> hourse to put the c-clip in place.   What happened is one of retainer
> vanes (could not find better word) bent when it was driven into recess
> and it impeded c-clip to snap in place.
>
> Konstantin Bogach.




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