Hyundai R 160 LC-3, Service Manual, Page: 126 / 459

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When the left control lever is manually placed in the left(Right) swing position. Then the oil flows
from front pump through the swing section of the main control valve to swing motor to left(Right)
swing the superstructure. The return oil flows from swing motor through the swing section of the
main control valve returned to the tank.
When the control lever placed in the neutral position, the pressure of the pilot oil passage down.
Then the brake release valve returned to the neutral position and the oil is returned from the brake
piston to the tank. And the brake is set to "ON". The swing parking brake, make up valve and the
overload relief valve are provide in the swing motors. The cavitation which will happen to the swing
motor is prevented by the make up valve in the swing motor itself.
7. SWING OPERATION
XAs
TRAVEL MOTOR
ARM CYLINDER BOOM CYLINDER
HYD
TANK
BUCKRT CYLINDER
TRAVEL SWING ARM BUCKET BOOM
RCV PEDAL RCV LEVER(LH)
RCV LEVER(RH)
SPIN
FILTER
LINE
FILTER
SAFETY
SOLENOID VALVE
SWING
STRAINER
Sh
Pg
XBs XAs
P1 P2 R
FRONT
PUMP REAR
PUMP PILOT
PUMP
SWING MOTOR
XBs