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Or possibly he purchasef a vakve wuthout power beyond and has two tank lines. Dan

What is the make and model of the new valve? Dan

My bad - cant keep all the different threads straight. I got you confused with "What goes up..." Dan

Not positive but that return port looks to be fine for use with your valve. Take the forward one out and verify it just dumps into the hydraulic sump. Your pressure supply and pressure return are coming from the two ports on the block up front. Dan

Two obvious things to check: 1) Valve oil delivery is slow. 2) Exhaust oil flow is (partially) blocked I am guessing (pretty good one) that your loader valve has regen on the extend function. That sort of rules out #2 but its easy to check. Just disconnect the rod end hose (not the coupler)...

Actual testing with a scale says my L3901/LA525 with grapple will lift a 800 lb log. Transporting that is an adventure. Dan

If you lift the boom in float the base end of the cylinders will likely suck in a good bit of of air. Expect them to sag considerably when you let go. Dan

The loader can easily support itself but dont use the boom or bucket as a lifting point for the tractor. Dan

On my 2 year old L3901 with 4 years remaining? I an not even slightly concerned :) Dan

The 3pt still does not work with the return hooked to the outlet block? Dan

Far more likely when they are connected. Dan

OEMs are a wonderful objective source of comparitive product data. Dan

Yes it is supplied by Warren but I prefer the word "blended" 🙄 Dan

All I can tell you is experiment with the range selection. I was surprised to discover my L3901 cant even come close to pulling my asphalt driveway in high range. Dan

What size bush hog and how heavy was the vegatation? In middle range a 72" rear discharge finish mower going uphill hills in high grass is enough to drag down my L3901. The low range is there for a reason and it aint just about top speed. Dan

Yes. Dan

I am sure you will need a new longer hose for the loader power beyond. Dan

Forget the remotes. You make your connection at the outlet block under the right floorboard where the three loader hoses are connected. Top right port is pump, top left port is power beyond, and bottom port is tank return. One more time: Disconnect the power beyond hose and connect it to the...

At the loader valve power beyond connection to tractors hydraulic outlet block. Disconnect loader power beyond at hydraulic block and connect it to inlet of your new valve. Use a new hose if necessary Using new hose connect power beyond port of new valve to hydraulic block Install a tee on...

The reliefs on the individual valves are port reliefs. Dont mess with them unless you know how they work and how to set them. They are shock control and overload devices not working pressure devices. Dan