Clutch Swap-out

rnicholas

Member
I rebuilt a BN I had and got it running. But I didn't have any clutch. That is, with the clutch pedal all the way down the fingers on the clutch were not being depressed enough to release the clutch plate. So, I adjusted the linkage in the torque tube as far as possible but the gears were still grinding to get into gear. I adjusted it a little more and it started a loud TAT-TAT-TAT from the clutch. So my question is this. Can I not switch out a clutch from an A to the BN? Because that is what I did thinking they were interchangeable. I guess not. So, I wanted to hear from you guys before I break this thing into to see what the problem might be. I did replace the throw-out bearing I might add.
 
Clutch will interchange.

Is it possible the lined plate was installed backwards or was bent during the splitting and reconnection process?
 
From the A,AV, and B Service manual - same clutch

this sentence: "The normal maximum clearance between the release bearing and the release fingers
should be 7/16".

This clearance can be measured through the inspection hole in the bottom of the torque tube.

Hope this helps you.
 
I agree, driven disk in backwards will do it. A clutch shaft with burrs or wear patterns will also force a new disk into the FW. Jim
 
Your noise is due to the fingers being depressed so far the ends are hitting the disc or the throw out bearing is hitting the hub of disc. . When the clutch is properly assembled to flywheel the fingers will lay parallel to the flywheel. You can live with them being somewhat higher than that height but not lower as they normally keep coming higher as disc wears.

If new bearing did not fit on sleeve like old one and sleeve protrudes more that could also be your problem and also explain why you had to adjust linkage so much.
 
I agree with Bob and Jim good chance you have the clutch disk in backwards BTDT and learned that the hard way back when I was a teenager on a 1971 GMC pickup truck
 
(quoted from post at 20:34:33 03/07/19) I agree with Bob and Jim good chance you have the clutch disk in backwards BTDT and learned that the hard way back when I was a teenager on a 1971 GMC pickup truck

When you have your tractor split again check the pilot bushing in the crankshaft. The shaft drags on my B and it's hard to get into gear when it's cold. If I stop the engine and shift into gear and hold the clutch down and let the engine run a little to warm up the lube on the pilot bushing it works fine. There is not enough drag that the tractor will move with the pedal down and the transmission is in gear. Just enough to turn the transmission making shifting hard.
 
(quoted from post at 20:34:33 03/07/19) I agree with Bob and Jim good chance you have the clutch disk in backwards BTDT and learned that the hard way back when I was a teenager on a 1971 GMC pickup truck

When you have your tractor split again check the pilot bushing in the crankshaft. The shaft drags on my B and it's hard to get into gear when it's cold. If I stop the engine and shift into gear and hold the clutch down and let the engine run a little to warm up the lube on the pilot bushing it works fine. There is not enough drag that the tractor will move with the pedal down and the transmission is in gear. Just enough to turn the transmission making shifting hard.
 
A backwards clutch plate is a possibility. I can't remember paying much attention when I set the disk in place before bolting the clutch onto the flywheel. I also changed out the clutch plate as the one in it was down to the brads.
 

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