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3-6
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, MCV and swing port through safety solenoid
valve.
The return oil flow into the hydraulic tank.
1. SUCTION, DELIVERY AND RETURN CIRCUIT
R1
A1
A2
A4
A3
S1
S1
BOOM
SWING
Pb5
4
4
1
3
LH
BUCKET
ARM
A2
1
2
3
2
Pa5
Pb10
Pa10
T
A1
A2
RH
IN
OUT
UP
DOWN
OUT
IN
P
Pa3
Pb2
Pb3
Pa2
Pa8
Pb8
Pa10
Dr2
Pb8'
P2
P1
Pa6
Pa7
Pa4
Pa5
Pa3
Pa1
Pa2
Pb10
Pb8
T2
Pb6
Pb7
Pb4
T1
Pb3
Pp1
Pb1
Pb2
LH
1
2
RH
B/SWING
1
2
Pa4
Pb4
2WAY OPTION
ACC
P3
A6
B6
A3
B3
A4
B4
A2
B2
B1
A1
B5
A5
B10
A10
B7
A7
A9
B8
Dr1
Pa8
BU
2
4
3
1
L/H
R/H
Pb6
Pa6 Pb7
Pa7
TRAVEL
DOZER
DOWN
1
2
UP
Pb1
Pa1
PILOT PUMP
MAIN PUMP
LINE FILTER
MAIN CONTROL VALVE
BUCKET CYL
BOOM CYL
DOZER CYL
TURNING JOINT
TRAVEL MOTOR-LH
SWING MOTOR
TRAVEL MOTOR-RH
STOP VALVES
B/SWING CYL
BUCKET
BOOM
TRAVEL-RH
TRAVEL-LH
ARM
PTO
DOZER
SWING
BOOM
SWING
ARM CYL
Pb5
Dr1
a1
a2
Ps
T1
T2
R/G
R/H
L/H
T2
a2
a1
T1
Ps
R/G
GB
GA
"R1"
"R2"
DB
P2(BW)
P1(FW)
P2(FW)
P1(BW)
B(CCW)
A(CW)
Mu
PB
R35Z73HC03