Tasmin Clutch

[Kerberos]

Clutch was slipping at Cadwell and by the end of the day I struggled to get up the hill to the paddock. On stripping it down the friction plate is worn on the flywheel side but the other side is brand new, the copper rivets holding the lining on are still gleaming.

Now my mechanical understanding is limited but I am struggling to understand how the clutch could semi work (it didn't drag and although I wasn't the fastest around Cadwell I did get round). My limited understanding is the friction plate is sandwiched between the flywheel and the clutch and should have 50% of the spring pressure on each side of it because it is loose on the splines.

Just wondering if anyone else had ever known this on a Tas, before I pay my entry fee for Rockingham assuming another clutch will resolve the problem. (I had done a 1/2 day at croft and all Friday at Cadwell on the dodgy clutch so a quick blast round the car park may not show up any problems)

Cheers

[rev-erend]

Not heard of that but given the evidence - sounds like the flywheel has either been contaminated with oil or the surface is very uneven.

I suggest you use a degreasing solution (acetone / panel wipe etc..) to wipe it clean and either have it lathed flat or feel and insspect it carefully for ridges.

[oakdale]

When the clutch is operated only the pressure plate moves relative to the splines on the spigot shaft, so the clutch plate has to slide on the splines to release from the flywheel.
It's normal for there to be more wear on the flywheel side of the plate because of this, but if it's excesssive, then it suggests the plate is sticking on the splines.
Although the plate may seem free to slide on the splines, during spirited gearchanges the plate can stick due to torque still being applied to the splines during the gearchange.
I would very lightly coat the splines with copper grease to try to prevent this.

[payner2008]

oakdale said:

When the clutch is operated only the pressure plate moves relative to the splines on the spigot shaft, so the clutch plate has to slide on the splines to release from the flywheel.
It's normal for there to be more wear on the flywheel side of the plate because of this, but if it's excesssive, then it suggests the plate is sticking on the splines.
Although the plate may seem free to slide on the splines, during spirited gearchanges the plate can stick due to torque still being applied to the splines during the gearchange.
I would very lightly coat the splines with copper grease to try to prevent this.

+1.

[Kerberos]

Thanks for the advice, new clutch in, copper greased up and hopefully all set for Rockingham.

Cheers Mick