Loader plumbing

J_J · Oct 3, 2011

Car Doc said:
That dawned on me also that would bypass the filter this weekend thinking about how I am going to do mine for sure so the sump return is the best way.

I agree since basically most of the oil could be bypassing the filter thru the loader valve and right back in the inlet of the pump except when the loader valve is being operated.

I am wondering if there is some sort of slight restriction by going thru the 3pt the way these that are plumbed in series meaning it isn't a straight thru arrangement?

If there is that would most certainly could explain why there are some slow loaders out here.

I have a buddy that has a 2420D and his VN loader is plumbed with a bypass going into the sump and not in series with the 3pt. So I know for a fact not every single loader out there is plumbed in series fwtw some body somewhere is looking at this differently besides a few of us. My other friend that just bought a VN 1610D has a VN loader and I am not sure how its plumbed but I will be looking the first chance I get.

A slow loader is basically due to low volume.

There are valves with regen to speed up hyd flow. Have you seen a bucket with regen dump? Very fast.

Just about all return ports should go to the tank/reservoir. You can run a hose for each valve or tee several hoses together.

Open center valves pressure flow have to be connected in series unless you use something like priority valves to divide the flow, and then each flow has it's own path, but that path could have one valve or multiple valves, but must be connected in series to the tank.

Car Doc · Oct 3, 2011

J_J said:
If you have a valve with PB as the last valve, you could plug the PB port, and use the OUT port to tank, or plug the out port and use the PB sleeve to pass on the fluid.

Yes I do and this is how I plan on doing mine with the OUT going back into the top of the trans case/sump which is our "tank" right now the OUT is ran to the 3pt.

Car Doc · Oct 4, 2011

Car Doc said:
Just for further conversation on some differences in our machines and for posterity. I am posting pics of my 3pt block and like I said these ports may be the correct way to plumb an auxiliary attachment?

It may have the return built in the block to dump into the trans case I have no idea so anybody have an idea please feel free to say it.

Found the answer if anyone else has this same 3pt valve! :thumbsup:

I was looking in my 336 manual for a pressure test port the procedure and specs etc and on page 270-10-11 and 270-15-2 found the auxiliary valve for loader and how it works etc.

The lower port is pres out and the upper port is in return. I clamped a clear plastic hose into the fittings to verify it flowed and which direction and it does.

I did try raising the 3pt (it was down doing the flows test) and noticed the hose swelling so I quit that yikes.

So am hoping the 3pt will not need to be clear down for the aux valve to work for rear remotes. I plan on running my splitter on those ports as long as there is enough pressure to do the job and want to be able to raise it to where it doesn't kill my back time will tell on that.

project_X · Oct 4, 2011

Car Doc said:
Found the answer if anyone else has this same 3pt valve! :thumbsup:

I was looking in my 336 manual for a pressure test port the procedure and specs etc and on page 270-10-11 and 270-15-2 found the auxiliary valve for loader and how it works etc.

The lower port is pres out and the upper port is in return. I clamped a clear plastic hose into the fittings to verify it flowed and which direction and it does.

I did try raising the 3pt (it was down doing the flows test) and noticed the hose swelling so I quit that yikes.

So am hoping the 3pt will not need to be clear down for the aux valve to work for rear remotes. I plan on running my splitter on those ports as long as there is enough pressure to do the job and want to be able to raise it to where it doesn't kill my back time will tell on that.

Here is my thread on attaching rear remotes to my 1602D.
I still have the loader plumbed like the instructions on Hoye, but am going to put the PB and replumb in the fall. Your block is likely similar to mine.

Scotty Dive · Oct 7, 2011

I want to ask a question to see if this is normal. I have a Vtek loader that I believe it cut into the pressure line - like most have posted here. I do not have any curl upward or downward pressure when my 3 pt hitch raise lever is in the all the way up position. Normal? Anything I can do to remedy this? I looked breifly at my loader valve and do not see any markings of a PBY port - and for what its worth I can't seem to locate a manufacturer - but that might be hidden under the miuting bracket.

J_J · Oct 7, 2011

If your FEL is the first valve in series, then it will use whatever hyd is available.

Do you have PB?

If you don't have PB, and are using the tank port to feed the 3pt, when you raise the 3pt lever up , you are pressurizing the total hyd system and the tank port on the FEL valve is seeing the 3pt relief pressure. The cyl fluid has no place to go.

Does you lift cyls work?

Your 3pt valve should not be in the max up position, but slightly down in neutral. In the max up position, you are causing the fluid to be relieved.

If you tee a gage in the IN port of the FEL, you can monitor the hyd system pressure, when any of the valves are operated.

How many hoses are on the loader valve? If it is 7, you have PB.

If you only have 6 hoses, then you are using the tank port for the hyd flow path.

deepNdirt · Oct 7, 2011

For anyone needing to have a visual on a what the PB adapter looks like here is the one on my control, and the 7 lines JJ speak of,

winston1 · Oct 7, 2011

Sounds like your 3 point is trying to lift higher even though it is at the top. Does your pump sound loaded when the handle is all the way in the lift position. If so, your feedback linkage may need a little adjustment. May not be the problem at all. Just thinking out loud. :thumbsup:

Scotty Dive · Oct 9, 2011

I think you might be right that when my 3 pt is all the way up the valve is loaded....So thats good news that I can adjust that.

Here is a picture of my loader valve....I am a novice with hydraulics. What does this valve tell you guys?