6. COMBINED SWING AND TRAVEL OPERATION R/G R/G Ps Ps Pm1 T1,T2 Pm2 Pm2 T1,T2 Pm1 P2 P1 P2 P1 Rs CK1 Pn2 Pn1 D B A C DR P BC COMP.
NRV2 NRV1 S/Motor DB Pk D5 C5 A5 B5 Pc5 Pd5 OPTION-B BUCKET CK2 Pb5 Pa5 (RG) SGo Dr SRG ARG SH C4 D4 B4 PG Pd4 0 DR3 Pc4 1 ARM1 REGENERATIION CUT OPTION-A BREAKER Pa4 Pb4 Au Dr(R7) Pc4 0 Pc3 Pc4 2 Pb3 GB GA DR2 Pa2 1 V3 BOOM2 ARM2 Pd4 B2 1 B(CW) Mu A(CCW) Pd2 Pc2 C2 D2 Pb2 1 A2 DR1 Pa2 Pb2 0 C1 SWING BOOM1 P02 Patt B1 0 Pc1 D1 Pd1 TRAVEL (LEFT) TRAVEL (RIGHT) A1 Pb1 Pa1 P01 DR0 Ptr STRAIGHT TRAVEL T1 P2 P1 Pu MRV SWING ARM BUCKET BOOM TRAVEL (2) (4) (3) (1) SH (3) (1) (2) (4) (1) (2) (3) (4) A1 A2 Psv a4 A B D E G F H J Pd2 Pc2 Pc4 0 Pa2 0 Pb2 0 T P Pa5 Pb5 Pd1 Pc1 Pb1 Pa1 Dr#,dr#,R# a2 a1 Pm1 (Pump) Pm2 (Pump) Pd4 0 Pk (T/Joint) Pm1 Pm2 A1 A2 A1 A2 ACC P3 P4 PG(S/Motor) Pi1 (Fl,MCV) Pi2 (Fr,MCV) M T T P2 P1 Po1(MCV) Dr B1 B3 A3 a3 T(dr2) When the swing and travel functions are operated, simultaneously the swing spool and travel spools in the main control valve are moved to the functional position by the pilot oil pressure from the remote control valve and straight travel spool is pushed to the left by the pilot oil pressure from the pilot pump.
The oil from the front pump flows into the swing motor through the swing spool. The oil from the rear pump flows into the travel motor through the RH travel spool of the right control valve and the LH travel spool of the left control valve via the straight travel spool. The superstructure swings and the machine travels straight. D21073HS22 3-27