Spline shaft oil seal

[jsfarmall]

Changing the front spline shaft seal on the transmission, the seal I ordered from Napa does not have the retainer with it. Can the old seal be pulled out of the retainer and new one put in?

[Slim140]

Yes.

[Chet]

In addition to the Spline Shaft Oil Seal, when installing a new TRANSMISSION FRONT BEARING, WHICH SIDE OF THE BEARING GOES TOWARD THE TRAINSMISSION?

[Glen]

Hi,
jsfarmall,
the seal can be replaced, if the seal is separate from the retainer. If the seal and retainer are made together, then no, the retainer won't use a regular oil seal.

Chet,
I guess you mean the front bearing on the transmission upper shaft, the long clutch shaft.

You didn't say what style of bearing you have. Fully open, a seal on one side, or a seal on both sides.

I bought a new bearing at Case IH, and it is sealed on one side. The man there said to put it in with the sealed side to the rear, so the oil from the oil trough can get into the bearing.
The bearing I have, if I hold it up to a light, I can see light through the ID of the seal, so it is not fully sealed. Some oil can slowly run through it, evidently. I don't know if your bearing is like that or not.

[Chet]

Thanks Glen for the response.................. I will take your info and look at my bearing and see how it fits your description. I purchased my bearing from TM Tractor in CT.

[Chet]

Thanks Glen......... I cleared the air on this subject. My bearing is "sealed" on the back side. TM Tractor, my supplier, settled the issue with a new bearing from him..... great guy, great help, great parts. Next is getting the shaft "stuck up the Cub's rear", not simple with one eye and me.

[Glen]

Hi,
I guess you meant the bearing has the shield on one side, and is open on the other side.
Did you hold it up to a light, and see if you could see any light, looking from both sides, I wondered if the TM Tractor bearing is the same as the Case IH bearing.

[JohnMihevic]

In addition to the Spline Shaft Oil Seal, when installing a new TRANSMISSION FRONT BEARING, WHICH SIDE OF THE BEARING GOES TOWARD THE TRAINSMISSION?

I replaced my transmission input shaft, both bearings, and input shaft seal on my 1948 Cub this year. I bought the Cub from the original owner. The input shaft was never replaced. My original bearing and the CNH replacement have a shield on one side and is open on the other side. I installed my new bearing the same way the old one was, with the shield facing the front of the tractor. I still have my old shaft and bearing. Below are pics that show the bearing mounted on the shaft.

It makes sense to me to install it that way. If the shield is facing the rear of the tractor, the only oil the bearing gets is from the oil hole in the trough above the bearing. If the open face of the bearing is installed to face the rear of the tractor, it will still get oil from the "trough" oil hole. In addition, the gears spinning on the input shaft can now splash oil into the bearing which won't happen if the shield faces the rear of the tractor.

The "trough" oil holes in both my front and rear shaft bearings were plugged with sludge. A good preventative maintenance item would be to periodically remove the transmission cover plate and run a wire through the holes if they are plugged up. This is a simple job.

John M.

P.S. Note that the high speed input shaft, gears and bearings only get "oil splash" when the tractor is not in neutral and moving in one of the gears. The transmission "full" oil level only has the lower countershaft gears in the oil. If you are using the tractor PTO to power a rear attachment with the tractor stationary (such as an AC generator), it would be a good idea to move the tractor in a gear, periodically, to get some lube oil up on that input shaft and bearings.