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Hydraulic leak on Farmall 140

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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Paul Bertrand
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Hydraulic leak on Farmall 140

Postby Paul Bertrand » Wed Mar 04, 2015 9:15 pm

Today I developed a hyraulic on what my aftermarket manual calls the hydraulic manifold. The two steel tubes going from the hydraulic pump to the hydraulic block. The leak is on the lower tube, right at the flange that bolts to the hydraulic pump. My nieghbor suspects it is only an o-ring. But my manuel only says to change both manifold gaskets when disassembling the hydraulic unit. It doesn't give details about the pump or manifold, only the block. I will take the manifod off tomorrow and inspect it. I didn't see a crack in the line or paint blown away.It is a 1959 model 140. If anyone can help, it will be greatly appreciated!

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havoc1482
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Re: Hydraulic leak on Farmall 140

Postby havoc1482 » Wed Mar 04, 2015 9:55 pm

There are 2 orings at the connection between the pump and manifold. One for each line. If one of those is broken or damaged it will leak from there.
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Re: Hydraulic leak on Farmall 140

Postby rjohnson » Wed Mar 04, 2015 11:23 pm

I'm going to agree wit the o-ring theory.

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Re: Hydraulic leak on Farmall 140

Postby Paul Bertrand » Thu Mar 05, 2015 8:48 am

Thanks to all! I will go to my local IH dealer, although they have no parts, and get a part number and order a complete set of o-rings for both ends of the manifold.

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Re: Hydraulic leak on Farmall 140

Postby Don McCombs » Thu Mar 05, 2015 9:09 am

You might want to take a looks at the manuals at the following link. Although they are not for the 140, the systems are the same. You will find O-rings only at the pump end of the manifold. The other end requires a fiber gasket.

http://www.cleancomputes.com/Cub/Super% ... index.html
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Re: Hydraulic leak on Farmall 140

Postby Dale Finch » Thu Mar 05, 2015 9:14 am

If it is like a Cub and SA, it uses just the 2 o-rings at the pump end. The Touch Control block end has a gasket.

If I were home, I would pop a couple into an envelope and mail them to you for free, as I have done a few TC rebuilds and there are extras in the kit...they MIGHT be of special material to handle the fluid...not sure.

Suggest you also check right where the lines go into the rectangular block at the pump, to make sure the leak isn't coming from there. I have seen a lot of lines with brazed repairs there. And one more possibilty to check is look for pinholes in those lines. The Cub I just worked on had a VERY small pinhole that weeped, then went slowly downhill and ended up right at the pump where it finally dripped. Ended up replacing the whole manifold, because where there is one pinhole from rust, there are probably more.

Anyway, if it is just the o-rings (hopefully), maybe someone else has a couple they can send you...good luck!
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Re: Hydraulic leak on Farmall 140

Postby havoc1482 » Thu Mar 05, 2015 10:43 pm

I have a ton of the o-rings from McMaster-Carr that I ordered for my Super As pump. You can only buy in bulk bags so I have no use for them. I can just slip you a couple in a envelope free of charge.
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Re: Hydraulic leak on Farmall 140

Postby Paul Bertrand » Fri Mar 06, 2015 8:28 pm

Thank all you guys for your help and kindness! My local IH dealer had the o-rings, to my surprise. I change all four of them ( because my 140 has an auxillary Hydraulic unit mounted to the main hydraulic block). So there is a flat plate at both ends of the maniold with two o-rings at each end, instead of a gasket where the manifold connects to the hydraulic block. However, o-rings are not the problem. There is a crack in the tubing where it joins the flat block at the pump end, so I will have it TIG welded by proffesionls. TIG is similar to brazing, but much stronger. TIG is used in very high pressure lines.
So I wll clean up the manifold this weekend, with ether or denatured alcohol or both, and send it to the shop Monday. I will always keep a lookout for a used manifold at a reasonable price, especially if I can find one of these rare ones.
If anyone has more comments or advice, it will be most welcomed!!!

Thanks Again'
Paul

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Re: Hydraulic leak on Farmall 140

Postby Don McCombs » Fri Mar 06, 2015 11:14 pm

Well, I'll be. Learn something every day.
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Re: Hydraulic leak on Farmall 140

Postby Boss Hog » Sat Mar 07, 2015 7:19 pm

Paul Bertrand wrote:Thank all you guys for your help and kindness! My local IH dealer had the o-rings, to my surprise. I change all four of them ( because my 140 has an auxillary Hydraulic unit mounted to the main hydraulic block). So there is a flat plate at both ends of the maniold with two o-rings at each end, instead of a gasket where the manifold connects to the hydraulic block. However, o-rings are not the problem. There is a crack in the tubing where it joins the flat block at the pump end, so I will have it TIG welded by proffesionls. TIG is similar to brazing, but much stronger. TIG is used in very high pressure lines.
So I wll clean up the manifold this weekend, with ether or denatured alcohol or both, and send it to the shop Monday. I will always keep a lookout for a used manifold at a reasonable price, especially if I can find one of these rare ones.
If anyone has more comments or advice, it will be most welcomed!!!

Thanks Again'
Paul


keep an eye on e bay the manifold you have is on there once in a while, most do not know the difference :wink:

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Re: Hydraulic leak on Farmall 140

Postby Denny Clayton » Sat Mar 07, 2015 9:22 pm

Boss Hog wrote:
If you see any listed by Harvester 45 you can count on them being good he is a good guy
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Re: Hydraulic leak on Farmall 140

Postby ricky racer » Sat Mar 07, 2015 10:33 pm

If the tubing is cracked flush with the back of the block, TIG welding might be a challenge due to the silver solder used in the building of the assembly. The silver solder might contaminate the weld however you can silver solder it to make the repair. I've welded a lot of hydraulic lines and think that silver solder might be the better course of action to take. If the crack was an inch from the block, you could TIG weld it but myself, I'd silver solder (silver braze) it.
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Re: Hydraulic leak on Farmall 140

Postby Paul Bertrand » Wed Mar 11, 2015 12:43 pm

I got the manifold back last night and installed it this morning. No leaks, even put wieght on the drawbar to test it. At least not for now anyway! I really appreciate the info about the silver solder. I had no idea how those lines were welded to the rectanugular block, but now I know for future referance. The welder did say it would splatter while he was welding, probably because of silver solder. Thanks to all for your input, info, and advice!
But the 140 is back on the job, at least for now!

Paul

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Re: Hydraulic leak on Farmall 140

Postby Paul Bertrand » Wed Mar 11, 2015 9:52 pm

Also thanks for the info about ebay and Harvester 45. I sure would like a spare,especially in the middle of planting season!
Thanks Again,
Paul


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