TR2/3/3A Clutch Slave Adjustment

[RedTR3]

To set the clutch slave pushrod using the factory manual procedure, is the .079" gap set with the slave piston in it's "natural" un-energized position (without the return spring connected)?

 

[CJD]

The piston should be fully pressed into the cylinder, and the fork held against the release bearing. The play left over is what you are measuring. The return spring serves to fully bottom the piston when the clutch is released, and to pull the release bearing away from the clutch.

 

[RedTR3]

Thanks John, but I'm still not sure I understand...because it is possible to move the piston about 1/2" from it's resting position (toward the front of the car), however the piston will not stay in that position due to the spring inside the cylinder. So if that is the point that the piston is bottomed out, how can I measure the play if the pushrod is wanting to move back to it's resting position? Sorry if this is a dumb question, but I'll get it eventually...

 

[titanic]

I think you need to keep the external spring connected so that the piston stays at the bottom of the cylinder. Without the external spring, the clutch becomes self adjusting, like used on the TR6, and with the possibility of causing other problems.
Berry

 

[CJD]

Here is an interpretation of the manual description:

Leaving everything connected, including the spring, loosen the lock nut on the pushrod fork. Now turn the pushrod to lengthen it until you sense that it has fully compressed the slave piston into the cylinder. You should be able to do this by hand, so you can feel the increase in resistence as the piston bottoms, but before the clutch release fingers start to move.

Now, using a .079 feeler gage, place the gage on the end of the fork and screw the locknut back down to meet the feeler gage. At this point you will have the feeler gage "pinched" between the nut and the fork. Remove the feeler gage, and spin the pushrod (with the nut) until the nut touches the fork. Now tighten the nut with a wrench to lock it.

This procedure allows you to get the .079" of play without having to fight the springs while you are doing it.

 

[RedTR3]

Thanks John, that is a perfect description for an amateur like me...just what I needed.

Tim