Moss and BPNW sell the o-ring. BPNW also sells Nitrided pistons for the
PB series caliper. I took 4 pairs apart this past weekend and out of 8
pucks only 3 were reusable. 2 calipers were corroded, so I ordered 6
pistons and stored the 3 reusable ones. I media blasted the halves and
used my set of dental picks to clean the grooves. I noticed that the
mating surfaces have a super-thin coating of silver paint that did not
come off easily with the glass media. Does anyone have any knowledge
abut that?
Bob Kramer
Sales Manager
RDO Equipment Co.
16415 North IH 35
Pflugerville, TX 78660
512-272-4141
Fx 512-272-9365
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of Fubog1@aol.com
Sent: Thursday, January 11, 2007 12:40 PM
To: vinttr4@geneseo.net; fot@autox.team.net
Subject: Re: [Fot] Caliper questions
In a message dated 1/11/2007 12:40:38 PM Eastern Standard Time,
vinttr4@geneseo.net writes:
I fully expect the bores to be totally corroded, so of course I'll
have to split the calipers to clean them up. The manual says don't do
it, but I don think I'll have a choice
"DO NOT PART THE TWO HALVES OF THE CALIPER"
Yeah you can split them but it's best to do it at night in a closed
locked
garage so the caliper police don't catch you doing it... It's kinda like
removing mattress tags... under penalty of law...:-)
Actually it's hard to clean the bore WITHOUT splitting them, especially
the
top side of the groove where you can't see. There's usually a corrosion
build
up in there, I use a little bent scraper to clean it out. It can get to
the
point of effectively making the groove narrower & the seal wont fit
properly.
Pegasus sells the square-section o-ring as well.
The difference in the pistons is the style of dust seal... & price. I
don't
use the dust seals so that's a moot point.
There's no torque spec, I use 40ish on the 3/8 & 60-65 on the 7/16
bolts.
Like Steve said, there are different pads to suit big & small pins, &
the
pads differ in profile of friction material as well, tapered &
straight-sided.
I like the tapered because the straight sided pads will usually wear
uneven
from top to bottom, more towards the OD of the disc, where the speed
is
greater.
HTH
Glen
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