[Spridgets] TB Bearing Resting / Clutch Springs

Bob Van Kirk racerbob70 at yahoo.com
Wed May 6 20:04:39 MDT 2009


 
  A similiar spring setup was standard on all of the classic Minis but it was
atttached to the trowout arm and the slave cylinder

--- On Wed, 5/6/09, Kirk Hargreaves <khargreaves2 at gmail.com> wrote:

From: Kirk Hargreaves <khargreaves2 at gmail.com>
Subject: [Spridgets] TB Bearing Resting / Clutch Springs
To: spridgets at autox.team.net
Cc: davegran at tds.net
Date: Wednesday, May 6, 2009, 8:43 PM

I noticed that the way the parts are sold via Moss is that the rod that
pushes the TB arm/fork from the slave cyl snaps into the face of the slave
cyl piston so that the rod is held back thus removing friction from the TB
when your foot is off the clutch pedal.

When re-doing my clutch it so happened that I did not have the same rod
which would match up to the slave cyl piston and create this union. . . thus
nothing in place to hold the rod back, and in turn to keep the TB off the
springs when not needed, not in use.

As such, I ran an outboard light weight spring to ensure that the carbon
face on the TB is not consistently receiving friction from the clutch
springs.

The previous owner of my car had it set up in such a way that the TB
*was*resting full time on the
clutch springs. .  that TB blew up after less than three thousand miles.
The TB was cooked as well as the backing plate.  It looked to me as though
the entire unit was unable to take the constant friction that was placed
upon it.

I now have a few thousand miles with the outboard spring in place and
everything seems to be working fine.

It is interesting that opinions vary on this as much as they do.  It seems
to make sense that where you have friction you will also engender wear?

Kirk
59 BE
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