Things dont add up

[BMud]

I asked a question to you guys a while ago about my pto leaking on a 39 B, SN 78072. I was advised to get the rope type seal, found it in my parts manual...it was hiding in plain sight, didnt find it before. Now for the interesting part.

I open up the PTO housing and I find my existing seal, part number AB2578R. So I scratched my head and went back to the manual, that part started somewhere around SN 82000 (forget the exact number), which I assume is the start of the 1940 B's. Butttttttt, according to my plate I have SN 78072. The big question is, did someone swap my tag or is it possible that someone swapped out my PTO housing? I guess it isnt a big deal, the three seals I thought I needed cost about 10 bucks total, the "correct" seal is 14.45. It dont add up. :?: Thanks guys.

 

[johns48jdb]

can you get the number off of the power trol. it might help answer your questions. i put two of the seals in mine years ago and it still leaked a little. i'm into it again replacing the seals on the rear axles and i'm going to put a third one in there. i think i might havve to clean the shaft up real good this time before i put it in again. never put a seal back just exactly like it was. you have to put it in futher or not as far on have a sleeve to slide over the shaft. where the old seal was there will be a groove cut in the shaft from the seal believe it or not. putting the new seal back in place exactly where is was before only means it wll continue to leak.

 

[Rusty wheel]

A little trick I learned while rebuilding hydraulic pumps and fluid motors is if you are installing a lip seal you can remove the spring and install an appropriate size rubber "o" ring. This will give you a tighter fit on the shaft and prevent those pesky little leaks. rw

 

[johns48jdb]

sounds like that would put to much pressure on the rubber part of the seal and make it wear out quicker. it might work for a while, but i don't see that lasting long. i prefer to just relocate the seal to a different place on the shaft or when possible putting in a double seal. my shaft on my 48 b is pretty rough so i'm going to put three on them in there.

 

[Rusty wheel]

The right size o ring will tighten up the seal slightly, but that's the whole idea if you have a worn spot in the shaft. It won't cause an exceptional amount of wear on the seal because the oil keeps the rubber lubricated. Polishing the shaft will do more good than anything else. Two or three seals will work just fine if you have room, just adds a little to the cost....rw