Yuken vane pump A56 A56-L A56-L-R-01-C-K-32 A56-L-R-04-H-K-32 Hydraulic Yuken piston pump

Before first staring, fill pump case with clean operating oil via the filling port. In order to avoid air blockage when first starting, adjust the control valves so that the discharged oil from the pump is returned direct to the reservoir or the actuator moves in a free load.