[MV] Enlarged brake drum (potential) problem

Dave Cole (DA_Cole@compuserve.com)
Tue, 26 Jan 1999 13:32:51 -0500

Before going to longer push pins, I'd mount up the turned drums and adjus=
t
the brakes with the adjusters. (I assume a 715 has screw adjusters on th=
e
bottom - right?) The screw adjusters should be able to make up of any
overturning of the drums. I would be hesitant to replace the push pins
with longers ones since it is difficult to estimate what will happen with=

longer pins. ( ie will they twist sideways in a panic brake, etc or will
something fatigue and fail) I'd try the adjusters first, back them out=

so the shoes just drag, pull off the drum and make sure that the adjuster=

isn't about to come apart, etc. If everything looks ok, I'd just stick
with what you have and not alter the components.

Regarding DOT 5 brake fluid, I thought that you had to have a certain typ=
e
of rubber components to stand up to the fluid. But I might be wrong abou=
t
that as I recall hearing about people bleeding out all of their old DOT 3=

brake fluid and running some type of rinsing solution through and then
refilling with Silicone. Personally I think I'd just stick with DOT 3 or=
4
and then plan on bleeding the brakes every two years. The last quart of
DOT 5 fluid I bought at NAPA was 30 bucks or more. That's about
$120/gallon!

Dave =

Message text written by "Mark Masse"
>CAN ANYONE THINK OF A DOWNSIDE TO INSTALLING LONGER PUSH RODS? I'm certa=
in
there must be one--wrong geometry, poor shoe wear qualities, anything? Wi=
ld
guesses welcome, too.

I figure my other plan would be to take out a second mortgage on the wife=

and kids and buy NOS drums.

Since I'm changing all rubber in the system, I plan on using the new
silicon-based DOT 5 (or was it DOT 6) brake fluid. Will there be any
negative effects with older, unused NOS rubber parts (master cylinder
rebuild kit specifically)?<

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