1984 505 GL Front Brake Caliper Query
From: KLebrija1@aol.com
Date: Tue 05 Mar 2002 - 14:18:42 EST
I am in the final stages of finishing off my front end project on my
84,505 GL wagon. I believe it has Teves calipers (at least that's what they
look like in the book). There is, in the book, some mention about checking
the position of the piston using gauge "8.0805" which one must rest against
the upper part of the caliper.
The manual says that one should, "...Correct the position of the piston,
if necessary using a pair of circlip pliers, etc." Then it goes on to say
"mask the pads with adhesive tape(?) and coat with PERMATEX anti-squeal
compound."
If I look closely at the piston in the caliper I can see a slightly
machined surface on the outer rim of the piston, that takes up about 1/3 of
the of the circumference of the piston. I assume that this slight
indentation is what I have to adjust with gauge 8.0805.
As the machined surface appears to be in the wrong position, and I have,
of course, already installed the calipers, I will have to remove them to
properly position the pistons. I don't have gauge 8.0805, but I think I can
get close enough with a metal ruler and a protractor to guide me.
My questions are:
1. Why is this piston rotation important in the first place? I
know all about the ratcheting mechanism on disc rears, but these are front
brakes. Would there be a problem if I just put the pads in with the piston
in the incorrect position?
2. The manual says that, prior to installation, that I should
"mask the pads with adhesive tape and coat them with PERMATEX anti-squeal..."
I can understand the part about the PERMATEX, but masking tape?
I would, as always, greatly appreciate clarification of the above
questions as these issues are what is holding up completion of this job.
Thanks,
Ken
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