Re: OT truck problems

Posted by P Backus on January 10, 2006 at 08:12:48 from (69.128.32.197):

In Reply to: OT truck problems posted by tn terry t on January 10, 2006 at 03:23:53:

There is no way that the master cylinder can "pressure up" the
resevoir area, even if it is a bad master cyl, like some suggested.
Unless I"m missing something here, if it was bad, it would just
let brake fluid get past the piston, and the only thing that would
cause is a soft or descending pedal. In order to put pressure in
the master, it would have to "get" fluid from somewhere else,
which it can"t do.
You said it"s almost new; is it an aftermarket new master cyl? I"m
wondering about the condition of the sealing surface on the top
of the resevoir. Is it just a rough casting? If you had a milling
machine, I"d take it off and mill it just enough to make it clean
and flat and smooth. Maybe even a mill file across the top would
do the trick, but make sure the filings don"t get in the fluid.
Paul

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