If you haven't been, check out
www.hydroholics.net manifolds section. Basically, when the pump gets activated fluid gets sent to all four corners and depending what you're looking to lift, you activate the dumps that will NOT build pressure therefore the fluid's path of least resistance is to fill (and lift) those opposite corners. The 5th dump is opened (along with the pressurized dumps) to redirect the fluid back into the pump reservoir. Standing three wheel will depend on the vehicle, weight placement, cylinder size, and which switches you have wired to allow the three wheel function. If you have any questions, feel free to hit me up:
derek@hydroholics.net