This power unit use no-leak Dual way check valve to realize the complete isolation of two line. It make this two line totally independent in the action of lift and fall. It’s the ideal hydraulic power for multiple cylinder single lift system. This power unit widely used in primary and secondary (big scissor) fork lifter. Power Unit for Hydraulic Scissorlift 3.«ffi»mE*15-68CST, 1.This power unit is S3 working type, can not work continuously, can work repeatedly. 2.Before installation, please be sure the cleanliness of component like tank, tube and fittings, without any impurities. 3.Viscosity of oil should be 15-68CST, should be clean and without impurities. Suggest to use N46 hydraulic oil. If need to work all-weather, must use aviation hydraulic fluid. 4.This power unit is vertical installation. 5.After first work, oil tank should be checked immediately to see if there s enough oil. 6.After the first 100 working hour, hydraulic oil should be replaced. After that, the oil should be replaced every 3000 working hours.