It's almost time to do a COMPLETE brake system overhaul on my M715. Part of
that will, naturally, be turning the drums on a lathe. Some of the drums are
grooved--probably to 30 or 40 thousandths. Resurfacing will therefore take
out quite a bit of surface material. I'm not too worried about drum
failure--there's still plenty of overall thickness.
What DOES concern me is overextending the wheel cylinder pistons (they have
to travel outward that much farther to make the shoes contact the drum). One
of my contingency plans in case this happens is to install longer push rods
on the wheel cylinders. I've gone over it a few times in my head and
couldn't think of anything wrong with this plan.
CAN ANYONE THINK OF A DOWNSIDE TO INSTALLING LONGER PUSH RODS? I'm certain
there must be one--wrong geometry, poor shoe wear qualities, anything? Wild
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)?
Thanks in Advance,
--Mark Masse
1967 Kaiser M715 w/w
http:www/islc.net/~mmasse
mailto:mmasse@islc.net
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