John deere 301a power steering pump

[Dconk91]

I havent had a chance to look, but nothing is coming out of return line, for some reason the pressure continues to build, unless i turn the wheel,

 

[Dconk91]

Also key 10 is my supply line to power steer pump and 7 is pressure line, when i first mounted the ford ps pump i isolated the open center system by attaching key 5 to return side of pump and key 7 to pressure side, the pump has its own reservior, after filling reservior with about 1 gallon of fluid and i still had nothing returning to reservior i figured someyting was off, fluid would stay in reservior until i moved the steering wheel in either direction, it would draw fluid but never return it,

 

[Dconk91]

How much psi is needed to operate the system, i cant find a part number on steering valve

 

[Tx Jim]

Sorry I can't remember the PS pump pressure & I don't have access to a 300 tech manual.

 

[Dconk91]

Ok its been a while since i have posted, i had a child so tractor had to wait, anyhow im back at it, im going to upgrade my open center steering to closed center, i removed the old steering valve today p/n T22829, which is correct for open center, however im looking to put a closed center valve on it, what part number will fit, and besides the pressure valve downstream from reversor what else do i need?

 

[Tx Jim]

If your tractor has an open center pump then it's older than a 301A more like a model 300. CC PS valve housing casting #s are shown in photo below

 

[Dconk91]

Also is this the correct control valve needed?

 

[Tx Jim]

photo you posted is of pressure control valve which gives priority hyd pressure so power steering will operate correctly when other hyd functions are utilized when power steering wheel is turned.