- The above diagram shows 8 hydraulic vehicle lift (details below). An 917 compressor keeps the oil pressure constant What is the pressure drop (as a positive number) between the air and Point A? What is the air pressure if the pressure st point A is b psig? What is the weight of the lift and cylinder? Also, if the cylinder is required to lift a certain weight (which includes the weight of the cylinder), what would the pressure at Point A need to be? 0.88 1,048 B = b (psiq) = x (in) y (in] = z in) = Lift Cylinder Diameter (in) = Required Weight 1bl 320 83 9 13.606 Question 1 Answer Table Water Specific Weight (lbyt) 01 Specific Weight (lby ft") Ap (lbyft) 4p (lb in) Air Pressure (psie) Lift Weight (lbs) Needed Pressure at A (gig)