The pilot pump receive oil from the hydraulic tank. The discharged oil from the pilot pump flows to the safety solenoid valve through the line filter. The oil is filtered by the line filter. The pilot relief valve is provided in the pilot pump for limiting the pilot circuit pressure. The oil filtered by line filter flows remote control valve through safety solenoid valve. The return oil flow into the hydraulic tank. 3-6 1. SUCTION, DELIVERY AND RETURN CIRCUIT R/G R/G Ps Ps Pm1 Pm2 Pm2 Pm1 T1,T2 T1,T2 P1 P2 P2 P1 Pn2 Pn1 CK1 Rs CA P DR BD NRV1 BC COMP.
NRV2 Pk B5 S/Motor DB C5 A5 D5 Pc5 Pb5 Pd5 OPTION-B BUCKET CK2 Pa5 (RG)DS rR SG ARGSH PC c4 D 4 PbB 44 Go DR3 41 REGENERATIION CUT PG Pa4 Pd40 BREAKER ARM1 OPTION-A Au Pc40 Pc4 2 Dr(R7) Pc3 Pb3 DR2 Pd41 Pa2 1 BOOM 2 ARM2 GB GA V3 B2 B(CW) Mu A(CCW) C2 A2 D2 Pb21 Pc2 DR1 Pb20 Pd2 Pa20 SWING BOOM1 P02 Patt C1 B1 Pc1 D1 A1 Pb1 Pd1 Pa1 TRAVEL P01 DR0 (LEFT) T (RR IA GV HE TL ) Ptr S TRTR AA VI EG LHT MRV P1 P2 T1 Pu SWING ARM BUCKET BOOM TRAVEL Psv (1) (3) (2) (4) (3) (1) (2) (4) SH a4 A1 A2 (2) (1) (4) (3) A B D E G F H J Pa1 Pb1 Pd1 Pc1 a1 a2 Pc2 Pd2 Pc4 0 Pa5 Pb5 Pa2 0 Pb2 0 P T Dr#,dr#,R# Pd4 0 (P Pm um1 p) (P Pm um2 p) ( T /P Jok int) Pi1 Pm1 Pi2 Pm2 A1 A2 ACC A1 (Fl,MCV) (Fr,MCV) A2 P4 PG(S/Motor) M P3 Po1(MCV) P2 a3 19 Dr T T P1 B1 B3 A3 T(dr2) D21073HS02