Figured I'd put this here for now so I can find it latter.
Disconnect the negative battery cable.
Remove the side panels.
Remove the tunnel cover.
Sand the drive shaft clean in the areas in front of the driveshaft output yoke and the cooling fan. Apply some sort of lubricant such as WD 40 to the driveshaft.
Remove the snap ring in the front recess of the cooling fan and slide it forward on the driveshaft.
While rotating the fan on the driveshaft, move the fan forward about 3 inches.
Put a jack under the rear end and raise the tractor about 3 inches. Put a block between the housing and the jack to distribute the weight.
Install a jack stand between the frame rails and up under the drive shaft, just forward of the driveshaft output yoke, the one that attaches to the rear rag joint.
Rotate the drive shaft so the spirol pin in the transmission input yoke is in the vertical position.
Lower the tractor, using the jack that you have under the rear, until the drive shaft is LIGHTLY! resting on the jack stand. The jack stand MUST be right in front of the driveshaft output yoke. The driveshaft Must be supported well enough that when you drive the spirol pins out you cause no damage to the transmission input bearing.
Now, drive the spirol pin out of the transmission input yoke.
Now drive the spirol pin from the driveshaft output yoke. You may have to raise, rotate, lower to get that pin in an accessible position.
Once both pins are out, raise the tractor with the jack, enough to remove the jack stand.
Rotate the yokes and rag joint assembly about the shaft and move it forward.
Be aware; if you have a single rear rag joint there will be a ball bearing inside the transmission input yoke that aids in driveshaft centering, do not loose this.
Remove the bolts that attach the driveshaft input yoke to the front rag joint.
Remove the driveshaft from the machine.
Replace the fan. Inspect and if needed replace the front rag joint, and the rear rag joint and both front and rear ball bushings.
cooling fan part # IH-547749-R1
rag joint part # 722-3000
ball bushing part #941-3004
5/16” x 1 ¼” coiled spring pins. Mcmaster-carr #91598A526
Put it back together.
Sorry, this is just from memory, and I been drinkin’, so use at your own risk!