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Farmall & IHC Tractors Discussion Forum
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Strange Farmall Hydraulics Continued

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Ryan George

03-18-2004 14:04:52




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Here are the pictures that i said i would post. sorry, been swamped this week with finals. the link will take you to the picture page and then click on 1942 farmall H. i also have a few more pictures available. if you would like to see then, email me at George.264@osu.edu. thanks!

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RB

03-18-2004 16:30:26




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 Re: Strange Farmall Hydraulics Continued in reply to Ryan George, 03-18-2004 14:04:52  
The releif valve is what you have circled, it is hooked up ok, the releif valve when activated must dump back to reservoir. From the tee below the relief valve the hose should run to a remote valve (single, double or whatever it must be open center for IH) then return out of the valve to reservoir. The oil returning to these old "belly pumps" will backup and come out the breather. A better return is to gut the belly pump and use one of the three side ports. Leave the fill tube for just that and lengthen it if possible, being sure that it can vent the system.

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NDS

03-18-2004 15:34:05




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 Re: Strange Farmall Hydraulics Continued in reply to Ryan George, 03-18-2004 14:04:52  
The part that I can see looks rather straight forward. Out of belly resorvoir to live pump. Out of pump to relief valve that dumps back into resorvoir. From there pressre line goes to where control valve should be and return line dumps back into top of resovoir. My guess is that control valve has been removed and it is set up to just circulate. Then again I could be all wrong. Pulley looks like drive for late model one row cotton picker.

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Greg

03-18-2004 16:34:26




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 Re: Re: Strange Farmall Hydraulics Continued in reply to NDS, 03-18-2004 15:34:05  
I agree with NDS. The live pump draws fluid from the belly pump. Normally it would flow from the live pump through the pressure relief valve to the control valve then back to the tank (by the fill cap) The way this is set up it is flowing from the relief valve to the tank. In other words, the pressure relief valve is always seeing 'overpressure'. I'll bet the hose from the pump to the pressure valve jumps when you first crank the engine over. It shouldn't do that.

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JDKIA

03-18-2004 14:51:20




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 Re: Strange Farmall Hydraulics Continued in reply to Ryan George, 03-18-2004 14:04:52  
On mine (two- way non-live) it has two hoses coming form the pump one hooks to where the drain plug should be, the other hooks to the elbow coming out of the pump, yours appears to have a distributor pump on it, in which case there needs to be a resivor some where I would assume based on the hoses that yours is set up to use the belly pump as a resivour, the images below are self explanitory, the question marks appear to be filler caps but I wasn't sure so I just put a question mark (If they work..)

They used a lot of elbows and fittings for some reason..

here are those images

third party image

third party image

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Ryan George

03-18-2004 16:14:32




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 Re: Re: Strange Farmall Hydraulics Continued in reply to JDKIA, 03-18-2004 14:51:20  
I posted a better picture showing the plumbing surrounding the fill tube. The first pictures didn't do justice to the mess that is there. the link is below.



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NDS

03-18-2004 16:41:01




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 Re: Re: Re: Strange Farmall Hydraulics Continued in reply to Ryan George, 03-18-2004 16:14:32  
That is a relief valve. You can pipe point A to point B but you will just be pumping oil out of bottom of resorvoir and back into top with no way to put it to any use. All you need is control valve plumbed between pressure line from relief valve and return line back into top of resorvoir.If you take relief valve out of system you stand good chance of stripping pump drive gears. Flex line after relief valve looks like it is about ready to burst and give someone hot oil bath.

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Ryan George

03-18-2004 16:58:40




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 Re: Re: Re: Re: Strange Farmall Hydraulics Continu in reply to NDS, 03-18-2004 16:41:01  
thanks again for all the help guys. one last picture for your confirmation. thanks alot!!!



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NDS

03-18-2004 17:22:26




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 Re: Re: Re: Re: Re: Strange Farmall Hydraulics Con in reply to Ryan George, 03-18-2004 16:58:40  
That should do it RB had good suggestion about rerouting return line.



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Ryan George

03-18-2004 14:58:46




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 Re: Re: Strange Farmall Hydraulics Continued in reply to JDKIA, 03-18-2004 14:51:20  
we had originally thought that the belly was used as a resevoir. when the tractor is running, there is oil coming out of the breather (fill cap). also, any idea where a control valve would go to run a lift cylinder?



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Old Farmall

03-23-2004 17:10:54




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 Re: Re: Re: Strange Farmall Hydraulics Continued in reply to Ryan George, 03-18-2004 14:58:46  
All you are doing is recirculating your hydraulic oil if there is no valve in the vertical pipe that returns to the filler pipe. If there is a valve in that line, and it looks like there could be one, make shure it is OPEN or all the oil will have to go back to the filler pipe through the bypass valve which would load down your engine! Your belly pump is your resevoir! It looks like they took the drive shaft out and are using that area for the suction line. You could take the riser pipe out where the hose from the bypass valve runs, which is your pressure line, and run that hose to your valve PRESSURE IN connection on a new two way valve. OUT line would go back to the filler pipe. Make sure your filler cap does NOT have a breather hole in it or it WILL leak oil. Drill and tap this hole and put a plug in it. On the old original Christmas tree valve systems, they had a small valve in this hole that you would close when using the two way hydraulics. When using a one way cylinder, you would have to open this valve. Good luck.

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Hugh MacKay

03-18-2004 14:30:31




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 Re: Strange Farmall Hydraulics Continued in reply to Ryan George, 03-18-2004 14:04:52  
Ryan: If he's not in his grave, you should find the designer of that, just to see what makes him tick.



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