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M clutch adjust

R

Raymond in Co

Member
I am looking at purchasing a 1950 M and test drove it and found that the clutch lets out very high in its travel.It grabs just before the pedal is back to its normal at rest position. I have the I&T manual and it says clutch adjustment is self evident, well it isn"t to me so my question is if there is thread (about an inch)left on the clutch pedal rod, is that enough to bring it back to a reasonable let out? The thread is available at the radiator side of the clutch pedal rod. And is there a better I&T manual out there. This one is lousy.
Thanks in advance.
 

I agree. That M needs a new clutch. The symptoms described cannot be adjusted out.

The I&T manual is very good for specifications and settings, but it assumes that you already know how to adjust the free travel of a clutch, and I think the IH manuals will be the same way.
 
Actually the Owner's Manual will likely have a better description of clutch adjustment than either the I&T or the IH Service Manuals.
 
Don't worry about a high clutch engagement as most of the new clutches will do this worry about the free travel and if it less then and inch then adjust the free travel and when it will no longer pull its self in road gear then put a clutch in .
 
If it doesn't slip, you don't need a clutch. Adjust so that free play is 1 1/8 inches from the pedal to the transmission cover. If it is as close to the cover as you say, you will soon need one.
 
I&T manual is a service manual, not a maintenance manual. I like it as well or better than the IH repair manuals.
 
Can I adjust the clutch so that it starts to engage 1 inch or so after it is released with the clutch pedal rod thread that I described? THere is about and inch of thread left on the front side of the tractor. Or is that the full adjustment already?

Thanks
 
I am only going to be driving it around my house,but I awant it to be smoother than it is. It grabs too fast at the high pedal.
 
The rod pushes. Find the place where the pedal touches the tractor platform (where your feet are).
Push on the pedal with your hand. it should have easy motion for a little, then push much harder. The distance from platform to pedal shank should be 1-1/8 to 1-1/4". Adjust the rod shorter (requires removing the pin, loosening the jamb nut, and turning the clevis on the threads, until the hand pressure freeplay is set.
A grabby clutch will not be fixed doing this, but it will be correct. A grabby clutch will either get better with use, or not. If not it can be replaced without splitting the tractor. JimN
 
The clutch doesn't grab, I used the wrong word. It doesn't engage until it is 1"from top of travel. Then it seems like it does it relatively all at once. I would like to lower the point of engagement closer to the floor plate. If I do have to replace thr clutch, I'm glad to hear I don't have to split it.

R
 
Just a reminder that you do NOT have to split the M to replace the clutch. Drop the hydraulic pump and you can replace the clutch from below.

Also, use threaded rod to lift the pump back in place after you are happy with the installation of the new clutch.
 
You don't want the "point of engagement" any closer to the floor plate. You're already withing the range of the tolerance for your freeplay, which is what keeps your throwout bearing andc lutch fingers out of contact while you're not stepping on the pedal.

Start with your freeplay adjustment as JimN described.

Do yo have freeplay at all? I suspect not. Freeplay is that distance that you can push the pedal down by hand against the resistance of the pedal return spring, before running into the heavy resistance of the springs on the clutch.

You seem focused on the thread available to the front for adjustment. How much do you have to the rear?

With the freeplay set as Jim N describes, you should be able to peek in and see something on t he order of 3/16-1/4" clearance between the face of the throwout bearing and the contact surfaces of the clutch fingers.
 
I will check on the amount of free play. The tractor is about 50 miles from me at the moment.I havent bought it yet. I"ll do some more homework and get back with you. Thanks. I appreciate your time.
 
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