03-11-2020, 12:48 PM
I've just been through this on a 3-speed clutch when I fitted a new clutch cover plate that had already had the grub screws fitted
and found that getting the depth of slot even was quite critical.
As a retired engineer I initially thought I could get it correct by measuring each toggle lever from the face of the crankcase and then converting these measurements into the amount to take off each grub screw bearing in mind that any change over the grub screw is multiplied by around 3 when it comes to movement at the toggle end. I did this to try to eliminate any other errors caused by wear in the toggle levers or their pivots.
Although I checked and double checked my measurements this didn't really work out and when I ran the car for the first time the clutch disengaged fine but I had a really bad vibration through the clutch pedal.
Based on some suggestions on here I then filed each grub screw to achieve exactly the same slot depth to an accuracy of around 0.1 mm and this time the results were fine.
The dimension I ended up with from the ends of the toggle levers to the crankcase face was just under 5/16" but if I did the job again I think I would have tried to get a bit more clutch disengagement as I still get a bit of a crunch when engaging first gear. That being said the problem I have is probably due to wear in the thrust race housing which I may try to rectify when I have the time.
John.
and found that getting the depth of slot even was quite critical.
As a retired engineer I initially thought I could get it correct by measuring each toggle lever from the face of the crankcase and then converting these measurements into the amount to take off each grub screw bearing in mind that any change over the grub screw is multiplied by around 3 when it comes to movement at the toggle end. I did this to try to eliminate any other errors caused by wear in the toggle levers or their pivots.
Although I checked and double checked my measurements this didn't really work out and when I ran the car for the first time the clutch disengaged fine but I had a really bad vibration through the clutch pedal.
Based on some suggestions on here I then filed each grub screw to achieve exactly the same slot depth to an accuracy of around 0.1 mm and this time the results were fine.
The dimension I ended up with from the ends of the toggle levers to the crankcase face was just under 5/16" but if I did the job again I think I would have tried to get a bit more clutch disengagement as I still get a bit of a crunch when engaging first gear. That being said the problem I have is probably due to wear in the thrust race housing which I may try to rectify when I have the time.
John.