Hyundai HX140L, Manual

Page: 191 / 819

3-26
TRAVEL CIRCUIT OPERATION TRAVEL CIRCUIT OPERATION
VB VA
Ps
DR
MB MA
LH
MA MB
Ps
VA
VB
RH
DR
REG
REG
T*
TURNING
JOINT
TO/FROM MAIN CONTROL VALVE
OVERLOAD
RELIEF VALVE
COUNTER
BALANCE VALVE
TRAVEL MOTOR DEVICE
C
A
D
B
Dr
P
Valves are provided on travel motors to offer the following functions.
COUNTER BALANCE VALVE COUNTER BALANCE VALVE
When stopping the motor of slope descending, this valve to prevent the motor over run.
OVERLOAD RELIEF VALVE OVERLOAD RELIEF VALVE
Relief valve limit the circuit pressure below 350 kgf/cm
2
to prevent high pressure generated at a time
of stopping the machine. Stopping the motor, this valve sucks the oil from lower pressure passage
for preventing the negative pressure and the cavitation of the motor.
1) 1)
2) 2)
140L3HC19A