Pete,
You may be correct and I don't have any information to dispute what you say,
however, even with the pin in there is enough rotational movement to wear down
the pins in the fork. It seems to me, and I've be wrong before, that if the
sleeve can rotate freely it will wear down the pins faster.
Andy
At 12/16/98 7:36:00 PM, you wrote:
>
>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
>
>
>
|