"Shimming the cylinder so it is physically located farther toward the
rear of
the car puts that location at Point A plus 1/8 inch (or whatever the
amount
of "slack" is that you have eliminated)."
No....... shimming the cylinder just locates the rod further into the
cylinder by 1/8th inch in your example.
The rod is fixed to the throwout arm and it's position doesn't change.
You just push 1/8th inch of displaced brake fluid up out of your full
reservoir.
This takes a bit to get your mind around the first time. I drew a very
crude bitmap representation of what I'm trying to say . I don't know if
it'll come thru as an attachment to the list, but I can send it to
anyone that cares. :^)
Jim
----- Original Message -----
From: "Vink, Graham" <vinkg@fleishman.com>
To: "Six pack" <6pack@autox.team.net>
Sent: Wednesday, August 21, 2002 12:27 PM
Subject: RE: Clutch Problem Discussion
> Well, I like a good obscure technical discussion as well as the next
guy,
> especially if it threatens to erupt into a flame war and doesn't
involve
> fuel injection, so I'm jumping in with my two bits:
>
> IMHO (and contrary to some other posts by my esteemed fellow listers)
I
> believe it WOULD help slightly if you shimmed out the physical
location of
> the slave cylinder to remove any "slack" in the system (ie worn clevis
pin
> holes).
>
> If we agree that the spring always pulls back the piston of the slave
> cylinder to the same point in the cylinder, regardless of the
cylinder's
> location, then that becomes Point A.
>
> Shimming the cylinder so it is physically located farther toward the
rear of
> the car puts that location at Point A plus 1/8 inch (or whatever the
amount
> of "slack" is that you have eliminated).
>
> When you step on the clutch, you are no longer using the first 1/8
inch of
> piston travel to take up the "slack." So your full 1/2 inch of piston
> movement is being applied directly to the fork, throwout bearing, etc.
>
> This also could compensate modestly for any slack inside the clutch
case if
> it exists (for example, any space between the throwout bearing and the
> fingers on the clutch disc)
>
> I agree that such shimming does not affect the total travel range of
the
> piston. And I also agree the best solution is new parts.
>
> Graham
>
>
> -----Original Message-----
> From: James Franks [mailto:jimmble@adelphia.net]
> Sent: Wednesday, August 21, 2002 11:38 AM
> To: jay_welch@juno.com
> Cc: Six pack
> Subject: Re: Clutch Problem Discussion
>
>
> Jay,
>
> All you can do for a worn clevis and pin is repair and/or replace the
> worn parts. Shimming won't work, and neither will a spring. (All that
> will happen is the slack will be taken up at the beginning of the
> stroke, and the spring will drag the arm back the same distance on
the
> return. Net gain= 0. )
>
> Jim
> ----- Original Message -----
> From: <jay_welch@juno.com>
> To: <6pack@autox.team.net>
> Sent: Wednesday, August 21, 2002 9:16 AM
> Subject: Re: Clutch Problem Discussion
>
>
> > Hello All,
> >
> > My thoughts are that the addition of a 1/4" to 3/8" shim where the
> slave
> > attaches to the plate might make up for worn clevis pins/holes
between
> > the clutch pedal and the rod??? Would I be correct in that
> assumption??
> >
> > Jay Welch, Abington MA
> > Secretary, "Cape Cod British Car Club"
> > http://clubs.hemmings.com/capecodbritish/
> > 1973 TR6 driver, 1971 TR6 project
> > 1989 Mustang GT someday morphing into a Factory Five '65 Roadster
> >
> >
> > On Wed, 21 Aug 2002 05:42:38 -0700 (PDT) michael lunsford
> > <mblunsfordsr@yahoo.com> writes:
> > > 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
> > > HotJobs, a Yahoo! service - Search Thousands of New Jobs
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