[ngreen]

The force is Pressure x Area. For a 2" bore cyclinder extending it it (pi x r X r), the area, x (psi), pressure. The radius of 2" is on so the area equals pi. The force equals pi times the psi. If you are using the max psi, 60, it is 60 x 3.14 = 188 pounds of force. This is when extending. While retracting the force is less, 170 pounds, because the piston takes up some a the surface area. You can use this on the other piston except the area and radius will be different. The one that came in the kit I believe was a 1.5" bore. So (3/4 x 3/4 x pi) is the area. Time it time the maz pressure, 60 psi, and you get a 106 pounds of force extending. When retracting you have to subtract the area of the piston from the area of the cyclinders bore surface. I would say retracting would be near 85 lbs without looking it up.