6.
COMBINED SWING AND TRAVEL OPERATION TRAVEL MOTOR-LH TRAVEL MOTOR-RH L/H R E D R E D R/H SWING MOTOR R E D PP DR PP PP ARM CYL EXTENSION CYL DOZER CYL A(FW) B(BW) DR2 DR1 DR1 DR2 A(FW) B(BW) STOP VALVE B(CW) A(CCW) T D B C A G H F E T P TURNING JOINT SOLENOID SELECTOR 3WAY VALVE BUCKET CYL BOOM CYL C2 C3 C1 C4 P2 P1 B/SWING CYL DR2 Pa8 Pa10 Pb8' Pa8 Pa6 Pa7 Pa4 Pa5 AC Pa3 Pa1 Pa2 DOZER MAIN CONTROL VALVE Pb10 T2 Pb6 Pb7 Pb4 Pb8 Dr1 Pb5 BU Pp1 T1 Pb3 Pb1 Pb2 TRAVEL DOZER DOWN UP R/H L/H 2 4 3 1 1 2 Pb6 Pa6 Pb7 Pa7 Pb1 Pa1 A B C D 7 B/SWING 2WAY OPT BOOM SWING BUCKET ARM E SAFETY 2-SPEED ACC A1 A2 K1 K2 LH 1 2 RH LH 1 2 RH LH 1 2 3 2 RH IN OUT UP DOWN OUT IN 4 4 1 3 P1 P2 P3 P4 P2 P1 K3 T Pa3 Pb2 Pb3 Pa2 Pb4 Pa4 Pb5 Pb10 Pa10 Pb8 E SOLENOID VALVE K4 TR Pa5 Pa8 S1 MAIN PUMP HYD TANK 189AK3HC35 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 the travel levers.
The oil from the P3 pump flows into the swing motor through the swing spool. The oil from the P1 pump flows into the travel motor through the LH travel spool. The oil from the P2 pump flows into the travel motor through the RH travel spool. The superstructure swings and the machine travels straight. 3-28 B10 TRAVEL(LH) A7 B7 BOOM B8 A9 BUCKET A10 P1 P2 A6 B6 A5 B5 A4 B4 TRAVEL(RH) ARM PTO P3 B3 A3 B2 ARM SWING CROWD A2 B1 A1 BS MRV-P2 MRV-P1 MRV-P3