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Farmall & IHC Tractors Discussion Forum
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Super C Two Point Hydraulics

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Bud

08-19-2003 12:38:33




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Can anyone explain the function of the Check Valve Block Assembly that is located on the work platform just in front of the seat ( part # 360 402 R92 )? I was having problems getting my hitch to lower until I bypassed this block. Without the " Block " the two point seems to work fine. Obviously it has some function but what?
Thanks




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DHuth2

08-19-2003 20:39:59




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 Re: Super C Two Point Hydraulics in reply to Bud, 08-19-2003 12:38:33  
I believe what you have there is a load check valve....its purpose is to prevent any oil from leaving the rod end of the cylinder unless there is a slightly higher pressure on the base end supply or vise versa. It will prevent cavitation of cylinder when you are lowering with a reduced GPM like when you are idling or when pump is not pumping. We use them alot on hyd. motors to lock them from turning or from overspeeding when turning an unbalanced load. The valve will have a shuttle and spring and a couple of seat assemblies sometimes using balls.I bet that if you have a two way cylinder and don't run tractor , the hitch will lower when you push lever now.Hope this helps....

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Hugh MacKay

08-19-2003 18:28:06




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 Re: Super C Two Point Hydraulics in reply to Bud, 08-19-2003 12:38:33  
Bud: It's been a few years but I think that check valve block assembly is designed so hitch will not lower unless engine is running. If I remember correctly the thinking was someone unfamilar with tractor may touch the hitch lever with considerable weight on it and they or someone else could get hurt. It probably gives some protection in preventing hitch from leaking down overnight as well.



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Brian Schmidt

08-25-2003 18:56:15




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 Re: Re: Super C Two Point Hydraulics in reply to Hugh MacKay, 08-19-2003 18:28:06  
You are both right. It is used to keep the hitch from drifting down at all. The valve is not that tight to hold oil under high pressure.



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