Hyundai HX130LCR Manual page 69

2) TRAVEL OPERATION
(1) TRAVEL FORWARD OPERATION
From RCV
Pc1
Pb1
From RCV
(2)
TRAVEL BACKWARD OPERATION
TRAVEL RIGHT
TRAVEL LEFT
Tank passage
During the travel forward operation, the hydraulic fluid of the pump A2 is supplied to the travel left
motor and the hydraulic fluid of the pump A1 is supplied to the other travel right motor.
The pilot pressure from the pilot control valve is supplied to the spring side of pilot port (pb1, pc1).
And it shifts travel right and left spools in the left direction against springs. Hydraulic fluid from the
pump A1 flow into the travel right spool through the bypass passage and hydraulic fluid from the
pump A2 flow into the travel left spool through the bypass passage.
Then they are directed to the each travel motor through port A1 and C1. As a result, the travel
motors turn and hydraulic fluid returns to the tank passage through the travel spools.
In case of the reverse operation, the operation is similar.
C1 D1
A1 B1
C1 D1
A1
2-25
P1 Bypass passage
TRAVEL RIGHT
TRAVEL LEFT
Tank passage
P2 Bypass passage
P1 Bypass passage
B1
P2 Bypass passage
14092MC18
From RCV
Pd1
Pa1
From RCV
14092MC17