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Super A belt pulley

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Jay Poole

Member
I've got a "48 SA that had a belly mower pulley on it, I don't have a belly mower and the pulley was in the way so I removed it. I was "bush hogging" with a 3ph mower when I noticed gear oil coming from around the belt pulley shaft. Seems that this tractor had two seals on the belt pulley. The parts book is confusing as to which seals I need. Has anyone run across this and do I need 2 seals or can I just replace with one seal. It just seems odd that you have a seal in a seal. Any help will be appreciated.
Thanks, Jay
 
Jay: When you removed the pulley, did you replace it with anything. Those tractors, if equipped with pulley, came new with a pipe type collar to slide over shaft, held in place by flat washer and bolt as pulley was. I think the pipe also keeps the seal in place.
 
Are you talking about the actual belt pulley or a pulley mounted to the PTO shaft to drive the mower? You'll want to have that terminology correct if you go to order new seals, just in case they might be different for each application. (The belt pulley is oriented perpendicular to the long axis of the tractor, and the PTO is parallel to that axis.)

In either case, your parts book will show a single seal on either shaft. The new reality is that the shells of the seals now available are not as deep as the originals, and it is quite common to put two seals on those shafts, one over the other. This is sometimes also and effective cure for a spot in the shaft that might have been worn down far enough that a new seal on that same spot would still leak. If in using two seals you are able to get the seal surfaces on different, unworn spots on the shaft, you should get a good seal. Some folks go so far as to pack grease between the two seals. That might be overkill if you've got a good surface on the shaft to seal to, but falls into the "can't hurt, might help" category in my view.

HTH
 
Hugh, I didn't I left the shaft bare. This is my first experience with one of these tractors. When I replace the seal I need to make a collar to hold the seal in place?
 
When you removed the pulley what did you do with the narrow bushing that fits around the shaft and the O.D.fits the seal I.D. Then if you arent going to replace the pulley you need the long bushing and large washer with a cap screw to hold the bushing on the shaft it will also keep the narrow bushing that rides in the seal. Just helped a fellow do his on an A that he is restoring. You can make the long bushing and make it longer so the end will ride in the seal. A flat washer and cap screw will hold it on.
 
The shaft seal on the belt pulley shaft runs on a bushing that is held in place by either the belt pulley being on the shaft, or a shaft cover that you put on the shaft when the belt pulley is removed. The cover is held with the same bolt and washer that retains the pulley. So if you put nothing on the shaft when you removed the pulley, you probably lost the bushing with the result there is a large space between the seal and the shaft. So you need the bushing and the shaft sleeve to retain it, not a new seal.
 
No you dont need a collar to keep the seal in but you do need somethinfg to fill the space between the shaft and the seal thats why i told you about the short bushing that goes where the seal sets.
 
(quoted from post at 01:07:11 09/30/08) No you dont need a collar to keep the seal in but you do need somethinfg to fill the space between the shaft and the seal thats why i told you about the short bushing that goes where the seal sets.
Click to expand...
Thanks much fellows this clears up my problem, thats what has happen to me I have lost the bushing in the seal. Now I have to set out and find a bushing. Thanks for all your help.

Jay
 
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