Clean all the hydraulic parts before mounting the power unit for fork lift The viscosity of the oil should be 15-68 cst Rated Input Power: 1600w Voltage: 12v/ 24v Gear Pump: 1.1-3.2 ml/rev Flow rate: 3.3-8.3 LPM Double acting with 3 way 4 position solinoid valve Power up and Down. Check valve to reverse flow. Use for applications when load holding and fifferent pressure setting on extend and retract are needed. Pumping station, Adjustab