Hyundai r35z-7 Workshop Manual page 123

9. DOZER UP OPERATION
TRAVEL MOTOR-RH
R/G
a1
P2(FW)
BOOM CYL
BUCKET CYL
Pa10
Pb8'
BUCKET
MAIN CONTROL VALVE
T2
Pb10
B/SWING
ACC
A1 A2 A2
LH RH
1 2
P
Pa2 Pb2
T
When the dozer control lever is pulled back, the dozer spool in the main control valve is moved to the
dozer up position by the pilot oil pressure from the remote control valve.
The oil from the P3 pump flows into the main control valve and then goes to the small chamber of
dozer cylinders.
At the same time, the oil from the large chamber of dozer cylinders returns to the hydraulic oil tank
through the dozer spool in the main control valve. When this happens, the dozer goes up.
TRAVEL MOTOR-LH
R/H L/H
R/G
Ps Ps
a2 a2
P1(BW) T2 T1 P2(BW) P1(FW)
T1 T2
TURNING JOINT
Pa8
Pa7 P1 P2
Dr2
BOOM
TRAVEL-RH TRAVEL-LH
Pb7 Dr1
Pb8
TRAVEL
DOZER
L/H R/H
DOWN UP
2
1 4 3 1 2
Pb1 Pa1
Pb6 Pa6 Pb7 Pa7
SWING
2WAY OPTION ARM
LH RH OUT IN
1
1 2 3 2 4
Pa3 Pb5
Pa4 Pb3
Pb4
Pa5
a1
DOZER CYL
ARM CYL
Pa6 Pa5 Pa4
ARM PTO
Pb6 Pb5 Pb4
BUCKET BOOM
IN OUT UP DOWN
3 1 2 4
Pb10 Pa10 Pb8
Pa8
3-20
SWING MOTOR
DB PB
"R2"
"R1"
STOP VALVES
GA B(CCW) A(CW) GB
Mu
Pa3 Pa2
Dr1 P3
BOOM
SWING SWING
T1
Pb3 Pb2
BU Pp1
PILOT PUMP
MAIN PUMP
A1 A2 A4
R1
S1 S1
B/SWING CYL
Pa1
DOZER
Pb1
A3
LINE FILTER
R35Z73HC18