Ra40 Clutch drama.

[maurice c]

Push rod isn't adjustable, should be pretty easy to add about 5-7 mm to a bit of metal though. Its a bit of trial and error but quite do-able.

I'm right in assuming that you cant adjust the pivot without pulling the box? Anybody had success by removing the arm rubber?

[allencr]

Push rod isn't adjustable, should be pretty easy to add about 5-7 mm to a bit of metal though.
Why, for what purpose, to correct some engineering mistake that only you can see?
I'm right in assuming that you cant adjust the pivot without pulling the box?
Nope, most likely not on whatever box you've got. But again WHY, It will accomplish nothing to do with your written problem?

If the pedal is soft from air, it has to be purged.
If the pedal is soft from air, its source has to be found & corrected - that's all of it.

[maurice c]

Well, as previously stated there is no air in the system, the spring was pulling the slave cylinder back giving the impression of air as this slack had to be pumped up again when you press the master. Removal of the spring completely cured the problem, the new push rod that I made up today seems to be spot on. The car is nearly 30 years old so maybe somebody adjusted the pivot, maybe somebody put a different spring on it. I'm not going to give it too much more though now that its working as it should.

[allencr]

Great!
Spot on?
That longer pushrod is going to bottom out the SC piston after the disk & pressure plate & flywheel wear a bit, and that will put continuous pressure on it & prevent the clutch from engaging completely while wearing out the release bearing.
It will also wear down the crank's thrust washers so you'll get back a little clearance back from that.

[maurice c]

Thanks to everyone for their input, you can always rely on the Chuckster IMO.