I have run a McLeod Hydraulic Throwout Bearing in my sideoiler powered Kirkham for over a year with no problems. Yes, you do have to pull your trans to replace a leaking unit, but there are advantages in simplicity, smoothness and pedal feel that I believe makes it well worth the while. Some thoughts:
1. Proper set up is very important. Ideally, McLeod builds the unit to fit your particular application, that is, they will ask you to take an exact measurement from the surface of the pressure plate fingers/tines (depending on what type you are using) to the trans mounting flange. It is extremely important that is measurement be EXACT. Also, correct (read "equal") adjustment of the clutch fingers is mandatory.
2. Some folks inexplicably use DOT 4 fluid instead of the mandated DOT 3. McLeod is very specific about this, but the mistake is often made. The victims of this "oversight" will be the various O Rings in the system.
3. The original style
oil-lite pilot bearing should be sufficient if the concentricity and proper length of the mainshaft has been given proper attention. They are very tough. A very SMALL dab of moly on the ID of that bearing is added insurance, as is a very light buff with crocus cloth on the mainshaft where it connects with the bearing.
4. Rick is right. I am running a McLeod aluminum flywheel and it was a marvelous, close toleranced fit on my LeMans crank. If you are experiencing problems, check to ensure the proper application and if correct, look for burrs or other flaws on the crank boss.
5. A clutch pedal stop is a good idea. Insurance.
6. Be very careful when bolting up the pressure plate to the aluminum flywheel. The holes are not heli-coiled (should be), and will strip easily. Use a minute amount of antiseize to give the next guy a break, but use it very sparingly or it will give you a false torque reading.
Bud
