Harry in Ky
Veteran Member
I think you're confused on a couple of different fronts. First of all, the 5902 valve plate doesn't have power beyond simply by virtue of three ports. The 4902 is also for power beyond, it merely forces you to find a third (sump) port somewhere else. Should one choose to ignore that, connect another valve in the series without that (and only two lines), you take your chances. Yes, many systems are set up that way and there are those who claim theirs works great like that. Fine. I don't do it that way.
Secondly, yes you do need the power beyond sleeve (which obviously your valve source rep didn't mention) in order for the three point to work properly. Third, the pressure "in" port on your loader valve is on the other side. The side where the relief valve is located. Right now you're plumbed into and out of the same port. You don't know that yet because you haven't actually put any oil through it. One more thing, you have a relief valve in the pump, and don't need the one in the valve. Loosen the nut, and screw the stem in a few turns to make sure it's set higher than the tractor system, or it might relieve at a lower pressure and affect performance.
Also, the parts list gives a pretty good description of the O rings you're looking for.
Secondly, yes you do need the power beyond sleeve (which obviously your valve source rep didn't mention) in order for the three point to work properly. Third, the pressure "in" port on your loader valve is on the other side. The side where the relief valve is located. Right now you're plumbed into and out of the same port. You don't know that yet because you haven't actually put any oil through it. One more thing, you have a relief valve in the pump, and don't need the one in the valve. Loosen the nut, and screw the stem in a few turns to make sure it's set higher than the tractor system, or it might relieve at a lower pressure and affect performance.
Also, the parts list gives a pretty good description of the O rings you're looking for.
Schematic, Manuals, Specifications and Diagrams for Hydraulic lift cover & related parts - 2000, 3000, 4000 | New Holland AG | MyCNHi US Store
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