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Farmall & IHC Tractors Discussion Forum
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Farmall H belly bump control

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Kevin

07-26-2005 05:23:56




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Why is it at shows i always see the belly pump control rods in the down position to lower a loader? I keep mine in the middle position wich doesnt move the loader at all now that i dont have the loader on any more. However maybe im wrong and thats why its leaking so much?




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NDS

07-26-2005 08:32:39




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 Re: Farmall H belly bump control in reply to Kevin, 07-26-2005 05:23:56  
With handle in middle "hold" position you could be holding up to 800 psi pressure against internal valves with handle in down position there will be 0 pressure inside pump.



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RustyFarmall

07-26-2005 11:49:50




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 Re: Farmall H belly bump control in reply to NDS, 07-26-2005 08:32:39  
That is true only if you have an implement on the tractor that is being held in the raised position. If there is nothing plugged into the hydraulic outlets, there will be no pressure against the pump or valves.



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NDS

07-27-2005 06:43:51




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 Re: Farmall H belly bump control in reply to RustyFarmall, 07-26-2005 11:49:50  
I beg to disagree if lever is pulled back and pump is working outlets will have pressure no matter if they are capped. The only way this pressure can be relieved is to lower lever or leak down through faulty valve. On the other hand if cylinder is hooked to system it will only hold amount of pressure required to exspand cylinder. The recomended way to check maximum pressure pump can build is to cap 2 outlets and put pressure guage in 3rd outlet.

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Dave in CT

07-26-2005 07:53:14




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 Re: Farmall H belly bump control in reply to Kevin, 07-26-2005 05:23:56  
I rebuilt a belly pump a couple of years ago. One of the springs had lost its expansion capabilities. I believe this was because it was left in a compressed state. I always leave my control rod all the way down to relax all the springs.



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Andy Martin

07-26-2005 05:28:08




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 Re: Farmall H belly bump control in reply to Kevin, 07-26-2005 05:23:56  
The middle position uloads the pump but locks the discharge line, so it could suffer some leakage due to thermal growth.

I leave mine down to keep everything loose.



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RustyFarmall

07-26-2005 05:26:29




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 Re: Farmall H belly bump control in reply to Kevin, 07-26-2005 05:23:56  
You are right, it should be in the middle position. Where is the leak coming from?



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Kevin

07-26-2005 11:05:39




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 Re: Farmall H belly bump control in reply to RustyFarmall, 07-26-2005 05:26:29  
The leak has developed around when the liftall pump and under side of the tractor meet.



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Andy Martin

07-26-2005 05:28:34




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 Re: Farmall H belly bump control in reply to RustyFarmall, 07-26-2005 05:26:29  
Why?



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RustyFarmall

07-26-2005 05:44:57




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 Re: Farmall H belly bump control in reply to Andy Martin, 07-26-2005 05:28:34  
I guess because that's the way I've always done it. I just now read through the owners manual for the hydraulic lift-all, and didn't find anything to verify my opinion one way or the other. In fact, there is no mention of what position the lever should be in when the lift-all is not being used.



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