GROUP 3 PILOT CIRCUIT Remote control valve (LH lever) RCV pedal Remote control valve (RH lever) Safety lock solenoid valve Swing parking brake MCV Travel speed solenoid valve solenoid valve Arm regeneration cut Power boost solenoid valve Line filter Boom priority EPPR valve Main pump Relief valve 40 kgf/cm 2 Pilot pump Suction filter (210-7) 3-05 The pilot circuit consists of suction circuit, delivery circuit and return circuit. The pilot pump is provided with relief valve, receives the oil from the hydraulic tank through the suction filter.
The discharged oil from the pilot pump flows to the remote control valve through line filter, EPPR valve, solenoid valve assemblies, swing parking brake, main control valve and safety lock solenoid valve. 3-6