IH '75 Cub Clutch Release Bearing, is it still good???

Anonymous-0 · Aug 8, 2013

Just split a 1975 IH Cub. Had been sitting at a relative's farm for almost 10 years. Got it running, but could never get it in gear. I thought it might be a stuck clutch, but that seems alright.

Took off clutch release bearing (throw-out bearing), it is the graphite type and seems in good condition. However was frozen tight, like that area had never been greased.

Question - should inner graphite part rotate freely or should it be very tight? I took it apart and cleaned it, and the graphite still looks in good shape but is still tight.

Thank you in advance for your assistance. David

screwstick · Aug 8, 2013

The graphite doesn't spin, it should be tight. There is a grease zerk on the TOB, and the graphite wicks the oils from the grease to lubricate the contact surface. Works well if its maintained. While you have it off, soak it in oil, then grease and reinstall. Set the clutch fingers to 1 1/4" exactly, and after reassembling the tractor, set the pedal to 1" free play.
Check out this link: http://www.farmallcub.com/phpBB2/viewtopic.php?f=141&t=6994

Anonymous-0 · Aug 9, 2013

Screwstick, thanks for your quick reply, and diagram.

Forgot to ask another question. There is about a 1/4 in. clearance around the graphite "bearing" center and the pto shaft, is this how it should be???? Should the shaft "ride" on the bearing center?? Does not look like a center is missing and I did not find any metal or pieces of graphite around the housing or clutch area.

Sorry, but I am a newbie to IH, have worked on old Fords only. I really like this IH cub, it is in great shape, motor starts and running great and nothing is missing, just can't get the gears going.

Thanks again for your assistance. David

notjustair · Aug 9, 2013

This sounds dumb, but is there enough oil in the rearend? If the oil has leaked out there is nothing to provide enough friction to slow things down once the clutch is pushed. I had an old tractor like that. Filled it with oil and it went right into gear.

mkirsch · Aug 9, 2013

The clearance between the throwout bearing and the shaft is normal.

As others have said, the throwout bearing is fixed in place, and does not spin. The pressure plate fingers "scrub" on the bearing when you depress the clutch pedal.

If you can't get it into gear because it's grinding, the clutch isn't releasing. It doesn't take much for the disk to stick/rust to the flywheel or pressure plate, especially if the tractor hasn't run in 10 years.

Taking it apart you may see nothing obvious but it will likely be fine when you put it back together now.

Before you slide the tractor back together, adjust the height of the release fingers on the pressure plate. IIRC they should be adjusted at 1-1/4" from the main metal surface of the pressure plate to the surface on the fingers that scrubs on the throwout bearing.

After you do that adjust the pedal free play to factory spec. I think that's around 1" as well.

IH '75 Cub Clutch Release Bearing, is it still good???

Anonymous-0

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screwstick

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Anonymous-0

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notjustair

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mkirsch

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