Posted by ScottyHOMEy on February 27, 2009 at 19:13:17 from (70.105.240.166):
In Reply to: Re: Farmall H clutch posted by dan harjes on February 27, 2009 at 18:14:42:
The swing arm you refer to is on a shaft. There will be another arm on the inside that moves a sleeve(carrier) holding the throw out (release)bearing forward to contact the clutch fingers. At rest with the pedal up, the face of the bearing should be close (1/4" or so) to the clutch fingers. I expect you'll find it much further away.
The clutch consists of two parts that you will be able to see from underneath. First there is the cover, which will be bolted to the flywheel. In the center of the rear of the cover you will see the clutch fingers, which are hinged near the outer edge of the cover. In operation, the throwout bearing pushes the inner ends of the fingers forward against the pressure of springs built into the cover, causing the pressure plate (the third part, which isn't readily visible) to pull away from the flywheel, taking the pressure off of the friction disc, which is sandwiched between the pressure plate and the face of the flywheel.
Did this problem come up suddenly? Has anybody done any work on the clutch lately (as in, did you buy it rebuilt already)? Are there any odd noises or do you feel any rhythmic banging or snapping through the pedal?
If you can reach them, try moving the fingers by hand. Turn the engine by hand so that you can chdck them all. A little wiggle/play in and out on their hinges is okay, but if they flop back and forth, we might be on to something.
I worked on an M (similar setup) for a fellow a few years back. He'd paid for a fully restored tractor, but had the same problem you're having. It did appear to be a new clutch up in there, but the fingers were flopping all over. The clutch had never been adjusted to specs before it was installed (most of them are pre-adjusted right out of the box).
That was that case, but a failure of the pins that the fingers hinge on can cause the problem. A failure in your linkage shaft or arms could do it.
Give a look up in there and fiddle around and come on back with what you find.
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