Hyundai r35z-7 Workshop Manual page 118

6. BUCKET ROLL OUT OPERATION
TRAVEL MOTOR-RH
R/G
a1
P2(FW) P1(BW)
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 right control lever is pushed right, the bucket spool in the main control valve is moved to
the roll out position by the pilot oil pressure from the remote control valve.
The oil from the P1 pump flows into the main control valve and then goes to the small chamber of
bucket cylinder.
At the same time, the oil from the large chamber of bucket cylinder returns to the hydraulic oil tank
through the bucket spool in the main control valve. When this happens, the bucket rolls out.
The cavitation which will happen to the rod of the bucket cylinder is also prevented by the make-up
valve in the main control valve.
TRAVEL MOTOR-LH
R/H L/H
R/G
Ps Ps
a2
a2
T1 T2 T2 T1 P2(BW) P1(FW)
TURNING JOINT
Pa8
Pa7
Dr2 P1 P2
BOOM
TRAVEL-RH TRAVEL-LH
Pb7 Dr1
Pb8
TRAVEL
DOZER
L/H R/H
DOWN UP
2
1 4 3 1 2
Pb6 Pa6 Pb7 Pa7 Pb1 Pa1
SWING ARM
2WAY OPTION
RH
LH OUT IN
1 3 2 4
1 2
Pa3 Pb5
Pa4 Pb3
Pb4
Pa5
a1
DOZER CYL ARM CYL
Pa4
Pa6 Pa5
PTO
ARM
Pb6 Pb4
Pb5
BUCKET BOOM
IN OUT UP DOWN
3 1 2 4
Pb10
Pa10 Pb8
Pa8
3-15
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
Pp1
BU
PILOT PUMP
MAIN PUMP
R1 A1 A2 A4
S1 S1
B/SWING CYL
Pa1
DOZER
Pb1
A3
LINE FILTER
R35Z73HC15