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Super A PTO Seal relacement, etc

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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Dale Finch
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Super A PTO Seal relacement, etc

Postby Dale Finch » Tue Mar 01, 2011 11:01 pm

After sandblasting my '48 SA, I noticed, a few days later, evidence of seepage from the seals and gaskets as well as where the shims are. I plan to replace the seals and gaskets, but my current question is how are the shims sealed? There are no gaskets between them, so what is to keep them from seeping after reassembly?

Image



When I removed the bearing retainer, there were 2 seals...Seal #48954D (as per the parts manual) along with what looks like a felt seal (not shown in the parts manual):

INSIDE VIEW
Image

OUTSIDE VIEW
Image

I remember from rebuilding my Cub's PTO, that the new seals were thinner than the original, and sometimes folks just stacked a new one in front of the old one. Is that what has happened here? Should I remove both and install the #48954D (actually a superceded number now)? Is there, indeed, a second felt-type seal that should be there?

Once again, thanks for any input.

Dale
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Re: Super A PTO Seal relacement, etc

Postby Boss Hog » Tue Mar 01, 2011 11:27 pm

Dale I only use one NAPA has them

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Dale Finch
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Tractors Owned: '51 Cub #140966 "Bruno" with Woods 59 mower
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'56 Cub #194370 "Boris" with Mott Flail mower
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Re: Super A PTO Seal relacement, etc

Postby Dale Finch » Tue Mar 01, 2011 11:38 pm

Thanks! I am starting a list for my local NAPA store. Plan to get some filters for Bubba (the SA) and Bertha (my Cub) at the April filter sale!

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Re: Super A PTO Seal relacement, etc

Postby Gary Dotson » Wed Mar 02, 2011 7:27 am

Generally the shims will seal on their own, but if you want to be sure, put a very thin coat of Loc-tite on them as they're being assembled. Be sure to tighten the bolts right away.

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Re: Super A PTO Seal relacement, etc

Postby Harold R » Wed Mar 02, 2011 8:24 am

Dale,
Your pictured seal was built to last. The replacement will be flimsy and half of the material. I didn't double up the PTO oil seal on my mowing cub and got about 4 years out of it before it started seeping. Even doubled up, (if there's room), I bet two won't last as long as the original. :(

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Dale Finch
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'55 Cub #191739 "Bertha" with Woods 42 mower
'56 Cub #194370 "Boris" with Mott Flail mower
Circle of Safety: Y
Location: NC, Chapel Hill

Re: Super A PTO Seal relacement, etc

Postby Dale Finch » Wed Mar 02, 2011 10:05 am

And I assume the original types are no longer available? Should I double seal it from the beginning? There is obviously plenty of room.

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Re: Super A PTO Seal relacement, etc

Postby Bigdog » Wed Mar 02, 2011 10:46 am

Dale - doubling up does not have the value that it first appears to. The outer seal will be running dry because the inner seal is working. By the time the inner seal wears enough to leak the outer seal will be worn out from running dry. Just inspect the shaft and make sure your seal is set to a depth where it will run on a smooth section of the shaft.
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Dale Finch
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Posts: 6645
Joined: Tue Apr 27, 2010 11:34 am
Zip Code: 27517
Tractors Owned: '51 Cub #140966 "Bruno" with Woods 59 mower
'55 Cub #187541 "Betty" with Fast Hitch
'55 Cub #190482 "Ben" with Woods 42 mower
'55 Cub #191739 "Bertha" with Woods 42 mower
'56 Cub #194370 "Boris" with Mott Flail mower
Circle of Safety: Y
Location: NC, Chapel Hill

Re: Super A PTO Seal relacement, etc

Postby Dale Finch » Wed Mar 02, 2011 4:40 pm

That certainly makes sense! And while I have your attention, is there a trick to pulling the bearing off the belt pulley housing? The manuals for the SA are quite lacking in details like the cub stuff...bummer. I hate to start with brute force if there is a better way.

ALso, I haven't tried removing the PTO housing yet, but wondered if there is any kind of problem/sequencing pulling it off regarding the shift lever? I know the cub manual said something about keeping the lever either engaged or disengaged (can't remember which).

Thanks! Dale
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Re: Super A PTO Seal relacement, etc

Postby JSTRICKLAND » Thu Nov 10, 2016 10:12 pm

I know this is a old post but I have the same problem. I have the napa seal in hand and wonder which way it goes back in? Solid side facing the pulley (the one with numbers on it) or open side?

James

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Re: Super A PTO Seal relacement, etc

Postby JSTRICKLAND » Fri Nov 11, 2016 7:18 am

Need Help on this 48954d seal for the Super A pto belt pulley, I have read the previous entries on this but now wondering which way the seal goes back in. I have the NAPA seal not enough beef there for sure. Does the flat part with the numbers face the pulley or the other way around?

Thanks
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Re: Super A PTO Seal relacement, etc

Postby Gary Dotson » Fri Nov 11, 2016 8:08 am

Install it with the open side toward the oil (number out).

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Re: Super A PTO Seal relacement, etc

Postby JSTRICKLAND » Sat Nov 12, 2016 8:32 pm

My shaft also has a red plastic like band on it. Dad who looked it up in his parts manual said that it was a spacer. Does the seal go over the spacer?
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Re: Super A PTO Seal relacement, etc

Postby Jim Becker » Sun Nov 13, 2016 12:06 am

The seal should run on a sleeve. The sleeve should be held in place by the pulley or a spacer if there is no pulley. Originally both the sleeve and spacer were steel.


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