if you have to use it and need lift half up, run a hose from the 3x5 cover under the seat ( plug there ). and run it to the hyds sump fill, that will let pressure off the lift piston. then chain the lift arms to the axle with a block of wood under them to keep them at set height.
that willlet you drag a drawbar implement. and not ruin the pump. oil will cycle out of the top cover back to hyds sump under lefs side of seat ( fill hole )