Your Lift-All system is a "single-acting" system. Oil under pressure comes out of the one port on the right side, and/or the two ports on the left side. The oil can be used to move a cylinder, and when pressure is released by moving the lever all the way forward, the oil flows back to the pump reservoir through the same line. Gravity is used to lower the implement which the cylinder raised. The only times you need a return line to the reservoir is if you are using it to run a hydraulic motor, or a double-acting cylinder. In the case of the motor, oil is in a continuous loop flow from the pump through the motor and back to the reservoir. That return line can be plumbed into the fill-port with a pipe tee. If you desire "double-acting" hydraulics, which can move a cylinder both directions, you'll need some additional valving. IH offered a "Christmas tree" attachment that mounted a valve above the fill-port and provided directional control. Those are uncommon, and cost $$$. It will be cheaper to do it with aftermarket parts, and that won't be exactly cheap, either. Keep in mind that your hydraulic system only works when the clutch is released, and is low-pressure by modern standards.
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Today's Featured Article - Talk of the Town: How to Remove a Broken Bolt - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want t
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