COMPONENT LOCATIONS CONTROL VALVE PORTS CX130 / CX160 2 - 13 CX EXCAVATORS Port Description 4A3 Bucket close 4B3 Bucket open 4A2 Boom lower 4B2 Boom raise 4A1 LH forward travel 4B1 LH reverse travel 5A5 Arm (dipper) retract (close) 5B5 Arm (dipper) extend (open) 5B2 RH swing 5A2 LH swing 5A4 Option circuit 5B4 Option circuit 5A1 RH forward travel 5B1 RH reverse travel PR – PL Pump inlet, P1-P2 P0 – OPT Supply to option spool R1 – R3 Plugged R2 FL – FR Neutral de-stroke signal PX1 Upper pressure switch PX2 Travel pressure switch PS1 DR1 – DR2 Leak-off return PS2 Boom/Arm (dipper) anti-drift pilot pressure R5 By-pass return R4 To cushion valve heat circuit Pi1 Swing priority Pi2 Cut valve Pi3 Arm (dipper) parallel circuit