114 and the second work port 112 of the ejecting control valve 66 the anti cavitation check valve 110 includes a check valve element 204 which normally closes the inlet 78 for pressurized fluid from the pump 76 fig1 the check valve element 204 is biased closed by a coil spring 206 a chamber 208 is provided with three openings 210 211 and 212 which communicate with the second work port 112 within the chamber 208 is a ball valve 218 which is free to move in and out of engagement with an annular seat 220 on the face of a retaining portion 222 of the check valve 110 the retaining portion 222 includes a chamber 224 which has orifices 226 228 and 230 which communicate with the exhaust core 114 and connect the work port 112 to the exhaust core via chambers 208 and 224 as is seen by fig1 in combination with fig3 when fluid flows from the chamber 44 and the piston 42 moves to the left suction is created on the second work port 112 which pulls fluid from the exhaust core 114 past the ball valve 218 and into the second work port the fluid then flows into the chamber 46 via line 52 so that oil fills the chamber 46 negating cavitation which would occur in the absence of the chamber.