This subject is a bit of a 'pet peeve', so I'm going to explain my
understanding of the systems a bit further.
The clutch doesn't work like the brakes. The throwout arm doesn't care
where you put the slave cylinder. The little spring behind the slave
piston pushes back as far as it can after you release the pedal, and
that's where the pushrod stops, regardless of where the cylinder is. I
have had a piston pop clear out of the slave once with it mounted on the
wrong side (oops!), so I am referring to adding spacer washers to a
properly installed cylinder here.
With the brakes, you are physically moving the shoes closer to the drum.
The big heavy springs on the shoes pull them back after each application
of the brakes. By adjusting the shoes closer, you are shrinking the gap
that the hydraulics must cover when the pedal is pushed, so your pedal
doesn't travel as far.
You CANNOT change the relationship of the throwout bearing to the
clutch pressure plate fingers by altering the slave cylinder location.
Can't, can't can't. The starting and ending points of the throw will be
identical, and no 'slack' will be removed.
A lot has already been written on the clutch subject, the use of return
springs, new designs for throwout bearings, etc., and a search of the
archives should help there. The guys from the Buckeye club, and others
have summarized the subject well.
I'm not flaming you Mike, just trying to relate what I have learned
about a system that gives us all fits at times. I'm glad you could fix
your problem, though I think it was due to some other reason. :^)
Jim
----- Original Message -----
From: "michael lunsford" <mblunsfordsr@yahoo.com>
To: <6pack@autox.team.net>
Sent: Wednesday, August 21, 2002 8:42 AM
Subject: Clutch Problem Discussion
> Jim Franks wrote:
>
> <Date: Tue, 20 Aug 2002 09:49:19 -0400
> From: "James Franks" <jimmble@adelphia.net>
> Subject: Re: Clutch Problem
>
> <Mike,
>
> <Moving the slave cylinder, or adding washers, or lengthening the
> pushrod
> does NOT change the travel range of the slave cylinder piston. It may
> move the travel to an unworn area in the slave cylinder bore, which is
> the only potential benefit of doing this. ( I have gained a few years
> service from a bad slave this way) With new or unworn parts, assemble
> as
> designed for best result>
>
> My response to the above is that I know that the range of the slave
cylinder does not change with these alterations. The suggested changes
result in the slave cylinder being in a position that takes up any
slackness between the pushrod and the initial disengagement of the throw
out bearing fork to the clutch. This idea is identical to the fact that
the adjustment of the rear brake shoes to the point where they are
closer to the drums results in less travel in the brake pedal. This may
not be the actual problem but it is a lot easier to check/try this idea
than to remove the transmission to check the fork/throw out
bearing/clutch. I learned this lesson the hard way by putting the slave
on the wrong side of the plate during my restoration-BTDT. Good Luck.
>
> Mike Lunsford, 1970 TR6
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