First thing is that the pressure is going to be about 750 on a good day. That is the normal pressure for a Liftall with no modifications in that era. It is an open center system meaning it makes pressure when the the pump control rod is pulled, and no other time. This pressure is applied to both the front elbow outlets at the same time (it is a T inside) The left rear is a delay port we will not discuss it, leave it plugged. The two way valve is usually hooked to the right pressure port, and its Center (return) is dumped into the reservoir. When the 2 way is ni neutral, and the pump control rod is pulled and held back, the fluid circulates through the 2way and back to the reservoir. If you hook up hoses to the 2 way and put couplings on the hoses there should be pressure at each coupling when the 2way valve is moved to put pressure in that hose. If there is air in the hose, the air can pressurize and blow oil out of the reservoir cap. The cap should not be vented with 2 way cylinders connected to the 2way valve. A motor, or 2way cylinder puts oil back in the reservoir as it goes out to the other end of the cylinder/or returns from the motor discharge. The diagram provided is reasonable. the valve shown is hydraulically the same as a IH christmas tree 2 way valve. Jim
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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