Hyundai r35z-7 Workshop Manual page 111

3. TRAVEL SPEED CONTROL SYSTEM
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 travel speed switch is pushed, the travel speed solenoid valve is actuated and the
discharged oil from the pilot pump flows to the Ps port of pilot valve in the travel motors.
As a result, the control piston is pushed by the main oil flow, thus the displacement is minimized.
When the travel speed switch is pushed once more, the travel speed solenoid valve is return to
original position by the force of spring, the hydraulic oil of Ps port returns to the hydraulic tank.
As a result, the control piston is returned by the main oil flow, thus the displacement is maximized.
CONTROL PISTON
PILOT VALVE
TRAVEL MOTOR-LH
R/H
L/H
R/G
Ps Ps
a2
a2
P2(BW) P1(FW)
T1 T2 T2 T1
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
Pb6 Pb1 Pa1
Pa6 Pb7 Pa7
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
Pa6 Pa5 Pa4
ARM PTO
Pb6 Pb5 Pb4
BUCKET BOOM
IN OUT UP DOWN
3 1 2 4
Pb10 Pa10 Pb8
Pa8
3-8
SWING MOTOR
DB PB
"R2"
"R1"
STOP VALVES
GA B(CCW) A(CW) GB
Mu
P3
Pa3 Pa2
Dr1
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
R35Z73HC05