Farmall H Loader, Hydraulics Problem

I Figured even with "h" control valve always in the up position the loader should go down when the external control valve is moved down. As the return line from the external control valve is plumbed back to tank.

Could the control valve be faulty?

any suggestions on how to do this properly would be greatly appreciated.
Note, I did remove the Vent cap, and it made it no better

thanks alot, hope i didnt confuse you to much
Matt

Unless you have dual-acting cylinders for the lift, there's really no point in having a second spool valve. Just use the ports sticking out the side of the tractor's torque tube, the single on the one side and the front port on the other. Plumbing is much simpler that way, too.

That's not gonna work. Either use the H's system or get a separate PTO pump/tank and use your other valve.

You're trying to keep dogs and cats in the same room here. They are fightin' each other. :>)

Allan

pressure line from belly pump to inlet of control valve

return line from control valve to fill port of belly pump

pressure port of control valve to cylinders

the reason i got it hooked into this is becuause I am gonna use the control valve so i can hook it up to 2 way hydraulic implaments that I own, IE a mower

See where the bind is?

The H is a one-way system and you're trying to run it thru a two-way valve.

Just isn't gonna work, ol' Sport. You either need a one way (read: dump) valve or a loader that has two-way cylinders.

The way you have it plumbed now, when you want to "lower", that oil has no where to exit to because it is dead-heading (except for the bleed channel) inside that valve.

Allan

There's nothing wrong with trying to run the H's one-way hydraulics through a two-way valve. Two-way valves (i.e. the christmas tree valves) have been an option on the letter series Farmalls from almost the beginning. In fact, that's how hydraulics work on any tractor... One-way fluid is redirected through a two-way valve to make two-way hydraulics.

The REAL problem is in trying to operate a one-way cylinder through a two-way valve, for the reasons you stated. In this case, the pressure is probably bleeding by a worn spool, causing the loader to go up sometimes.

I just wanted to make a correction because what you said is kind of misleading, and would cause some people to think that you can't have two-way hydraulics on a letter series tractor.

No, didn't mean that at all.

What I was trying to say was that if he is using a "one-direction" system, he has to use a "one-direction" valve.

Sounds like he is trying to make an old one-way loader work with a "two-direction" valve. :>)

Allan