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TO35 Pressure Plate Issues

M

MadMonk

New User
Greetings to all. I have a 1955 Ferguson TO35 with the dual clutch. Was backing up when the clutch pedal lost resistance, went all the way down and the old girl lunged back. Shut her down and had no clutch action at all. Split it in half and found the 3 pressure plate fingers had sheared off.
It has taken me a while to find a complete used pressure plate. Found one that I was guaranteed would be an exact match, put it in (with new pilot and throw out), bolted the tractor back together and, through the inspection cover on the underside, find that when the clutch pedal is fully depressed, it is still a good 2+ inches away from contacting the throw out bearing. Separated it again (only a few bolts this time) and even if I were to readjust the fingers,there is now way they are going to contact the bearing.
Am I missing something here?
Both plates appear identical, bolted in place on the flywheel no problem. I cannot compare the old plate fingers as they are sheared half off.
All rusty in the picture, but it had been sand blasted and looked new. Been sitting a while.
Any pointers would be great appreciated. Thx M

mvphoto48150.jpg
 
First, get a service manual. It will explain how to adjust the assembly and how to adjust the release pedal on the release bearing shaft. The pedal free play is set by loosening the pedal clamp and rotating the shaft clockwise in the clamp.
 
Check the linkage and make sure a pin or bolt has not sheared so the linkage is no longer working as it should. Seen that on a number of machines where the arm the throw out bearing mounts or the lever on the out side where the clutch pedal rod hook to has sheared so the parts can not work as they should any longer
 
I do not have a service manual, but there really is not much adjustable other than the pedal itself on the shaft. The "finger" adjustment is, from what I can see, for fine tuing the contact to the bearing. I will get a manual though, because I am missing something here.... Thx
 
I have triple checked all movements on everything that moves slides or pushes.The bearing comes all the way out.
 
Assuming you did replace the throw out bearing, (as worn through fingers are usually caused by a bad bearing), and compared the length of the new bearing.

Did you try loosening the pinch bolt on the clutch pedal and turning the shaft while holding the pedal up? There should be about 1/4" clearance between the pedal arm and the bottom of the running board mount.
 
(quoted from post at 21:49:49 01/21/20) Assuming you did replace the throw out bearing, (as worn through fingers are usually caused by a bad bearing), and compared the length of the new bearing.

Did you try loosening the pinch bolt on the clutch pedal and turning the shaft while holding the pedal up? There should be about 1/4" clearance between the pedal arm and the bottom of the running board mount.
Click to expand...

Yes, both bearings are new and identical to the ones that came out (the throw out was totally locked up).
And the clutch pedal shaft, even when fully turned "out", still does not bring the contact any closer.
It is all split open again and I will be seeing if something was assembled wrong, however everything went into its own place and there is nothing left over on the table.
 
You should be able to lay a straight edge across the pp fingers, measure to the back of the block surface, then lay the straight edge across the bell housing and measure to the front of the bearing, see what is not happening.

Is it possible the release fork set screws that hold it to the shaft are sheered or loose?
 
To all the guys who gave me pointers and tips concerning the problem with the pressure plate I put on my 35, I ended up taking it to a pro who found that the backing plate on the unit was a good inch and 3/4 thinner than the original one that came off (that bolts to the flywheel). He says it must have been off a diesel engine. He took it apart and reassembled onto the original backing plate and she works like brand new. Now some fresh paint and back to work. Pics to come. Thx to all.
 
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