Martin wrote:
>Do you really need the pin that is installed on the throwout bearing holder?
>It is suppose to be there to prevent the bearing and holder from turning 360
>degrees. Why should that be prevented?
Martin:
I just finished a clutch installation on my '73 TR6 a few weeks ago. I
ordered a sleeve from Moss and it came without the pin. Then, I ended up
ordering the clutch kit from British Parts Northwest... this is the one
with the Sachs pressure plate and a Toyota throwout bearing. In this case,
the Toyota TO bearing has a different inside diameter than that TR6 OEM
bearing, so they supplied a "custom" sleeve with the bearing already
installed. This sleeve also was absent the pin. Greg at British Parts
Northwest indicated to me that they supply those sleeves with no pin
because the pin ends up causing more trouble than it prevents. (assuming
that it prevents any, that is) Specifically, allowing the sleeve to rotate
freely means that perhaps every time you depress the clutch pedal, the pins
in the ends of the fork will be contacting a "new" part of that groove,
therefore spreading out the wear around the entire circumference of that
groove. If there is sufficient space when the clutch is engaged (foot OFF
the pedal) between the "fingers" of the diaphragm spring and the TO
bearing, then it should not matter that there is no pin. The
bearing/sleeve assembly will not rotate because it will not be touching
anything that is rotating. The minute you lean on the pedal, however, the
bearing will touch the fingers, the bearing will start rotating with the
fingers, and the pressure of the fork pins pushing on the sleeve will not
allow the sleeve to rotate.
In any case, whether it was advisable or not, I installed it with no pin.
The benefit to installing it WITH the pin is not obvious to me. I assume
that if the pin was necessary, the parts suppliers would supply the sleeve
with the pin in place.
Hope this answers your question.
Pete Chadwell
1973 TR6
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