STRUCTURE AND FUNCTION CONTROL VALVE CONTROL VALVE (3-SPOOL) STANDARD D B B3 A3 A B2 A2 PB3 PA3 G G PA2 F F PB2 PA1 E E B1 A1 PB1 C C T P1 B TS D A RKS00250 P1: from gear pump T: to tank Ts: to tank A1: to lift arm cylinder (head side) A2: to bucket cylinder (head side) A3: to attachment port B1: to lift arm cylinder (bottom side) B2: to bucket cylinder (bottom side) B3: to attachment port 10-32 SK818-5 SK820-5 turbo