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: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, March 26, 2009 1:33 PM To: [email protected] 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! [email protected] http://autox.team.net/mailman/listinfo/spitfires http://www.team.net/archive _______________________________________________ Support Team.Net http://www.team.net/donate.html [email protected] http://autox.team.net/mailman/listinfo/spitfires http://www.team.net/archive
