Pneumatic lift leather seal

Farmall B & BN Tractors, 1939-1947

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Wylieboy
Posts: 29
Joined: Mon Apr 27, 2020 11:24 pm
Zip Code: 75098

Pneumatic lift leather seal

Postby Wylieboy » Sat Nov 21, 2020 2:00 am

Now that the B is running (quite well, actually!), I am moving on to re-building the pneumatic lift. I took it apart, and it all looks fine, except of course, for the leather seal on the piston. And the cable wrapped around the piston in the groove is Not a continuous circle, it’s just a length of what looks like a lawnmower throttle cable. Where do I get a leather, and is the cable thing Ok?

Jim Becker
Team Cub
Team Cub
Posts: 15271
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Pneumatic lift leather seal

Postby Jim Becker » Sat Nov 21, 2020 2:08 pm

Been a while since I had one of those expansion springs in my hand. Your description sounds close. Does one end of the part end with a straight section that fits into the other end? The leather (piston cup) is part 15184E. You might be able to find a lead using google. Gene Bender (in Iowa) does a lot with these lift systems and may be able to help with a cup. Here is an old thread with some of his contact information:
viewtopic.php?f=170&t=23737

Wylieboy
Posts: 29
Joined: Mon Apr 27, 2020 11:24 pm
Zip Code: 75098

Re: Pneumatic lift leather seal

Postby Wylieboy » Sat Nov 21, 2020 11:06 pm

The expansion spring is hollow, and has about an inch long wire stuck in one end, which seems to link it to the other end, forming the circle. If I can find a cup, I think I’ll be in business.

Wylieboy
Posts: 29
Joined: Mon Apr 27, 2020 11:24 pm
Zip Code: 75098

Re: Pneumatic lift leather seal

Postby Wylieboy » Tue Nov 24, 2020 11:12 am

Have you ever been inside the pressure valve on top the manifold? Is it just a butterfly valve, or more complicated?

Jim Becker
Team Cub
Team Cub
Posts: 15271
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Pneumatic lift leather seal

Postby Jim Becker » Tue Nov 24, 2020 11:30 am

No, a butterfly valve would probably always be stuck. I'm not sure what you would call it. It is sort of a cross between a flap valve and a globe valve. The internal parts are pretty well illustrated in the parts catalog.

Wylieboy
Posts: 29
Joined: Mon Apr 27, 2020 11:24 pm
Zip Code: 75098

Re: Pneumatic lift leather seal

Postby Wylieboy » Tue Nov 24, 2020 11:41 am

Mine is empty, all welded up, even welded to the manifold. If it doesn’t look too complicated, I might have my machinist son try to make one.

Wylieboy
Posts: 29
Joined: Mon Apr 27, 2020 11:24 pm
Zip Code: 75098

Re: Pneumatic lift leather seal

Postby Wylieboy » Tue Nov 24, 2020 11:55 am

Where does one find said parts catalog?

Jim Becker
Team Cub
Team Cub
Posts: 15271
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: Pneumatic lift leather seal

Postby Jim Becker » Tue Nov 24, 2020 12:21 pm

In the PDF manuals on this site. If you want a hard copy, there are multiple sources of used originals or Binder Books should have a reprint.

Wylieboy
Posts: 29
Joined: Mon Apr 27, 2020 11:24 pm
Zip Code: 75098

Re: Pneumatic lift leather seal

Postby Wylieboy » Tue Nov 24, 2020 12:30 pm

Thanks!


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