Fluid is delivered by the pump through the valve body and grooves of spool 1 to the left end of power cylinder 2, moving piston 3 and table 4, attached to the piston, to the right. From the right end of cylinder 2, fluid is discharged through the valve to the tank. Upon travel of the table, trip dogs a, mounted on the table, engage lugs d of rotary pilot valve 5, turning the valve member. A part of the fluid is delivered by the pump to this valve and further, opening ball check valve 6, shifts valve spool 1 to its extreme left-hand position. Fluid from the left end of spool 1 is discharged through flow-control valve 7 and valve 5 to the tank. After this, fluid is delivered by the pump to the right end of cylinder 2, moving piston 3 and table 4 to the left.
$4188$CHP,Dr$