The clutch master is identical to the brake master on early Spits (except
the brake master has a larger reservoir). The relief mechanism is simply
that the piston has to come all the way back to its resting position. This
allows the line to bleed back into the reservoir and the pressure
dissipates.
So it this is not happening, something is restricting it. Could be that
something is worn inside the master cylinder or the petal is being
restricted in some way.
If it is the master, it is not all that expensive to rebuild it unless the
bore is extremely worn or pitted. Mechanical restrictions are probably much
easier to fix.
When I experienced this in my brake system, it was caused by my inattention
to detail when I added the Tilton brake bias system. I had to build new
rods and did not allow enough play to let the piston come to the normal
resting position. A little grinding resolved the problem very quickly.
Joe
-----Original Message-----
From: spitfires-bounces@autox.team.net
[mailto:spitfires-bounces@autox.team.net] On Behalf Of jimmuller@rcn.com
Sent: Thursday, March 26, 2009 1:33 PM
To: Spitfires@autox.team.net
Subject: Re: [Spits] clutch hydraulics query
Thanks to all who responded so quickly.
> ...preventing the pedal from coming up all the way.
The problem I have with this explanation (and all similar) is that if the
pedal doesn't come up all the way it would also start its next journey down
from that same depressed position. (My clutch pedal is depressed? Should
it see a therapist?) Displacement at one end equals displacement at the
other, and the total volume in the system shouldn't change unless one moves
and the other doesn't. On the other hand, I can't discount all y'all's
experiences either. they certainly fall in with Dave M's suggestion that
the fluif return valve isn't working.
Time for new hydraulics unless I happen to have rebuild kits already on my
shelf and the cylinder bores are in good shape. In any case, I really
needed one more thing to do. :-)
Tanks again!
Spitfires@autox.team.net
http://autox.team.net/mailman/listinfo/spitfires
http://www.team.net/archive
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Spitfires@autox.team.net
http://autox.team.net/mailman/listinfo/spitfires
http://www.team.net/archive
|