Hyundai HX145LCR Manual page 126

- DURING TRAVELING OPERATION DURING TRAVELING OPERATION
RELIEF VALVE B RELIEF VALVE B
During traveling operation, RA port pressure goes up and RB port pressure goes down.
Thus RA port pressure oil flows into chamber 3, and pushes plunger to the left with a high pressure
and the power of the spring.
Chamber 3
- WHEN IT STOP WHEN IT STOP
RELIEF VALVE B RELIEF VALVE B
When it stops or operates reversely, RA port pressure is decreased and RB port pressure suddenly
goes up by the inertia of the machine heavy structure.
Relief valve B operates as the same order as relief valve A, and maintains the set pressure by
releasing the high pressure of RB port to RA port.
Plunger
RB
RB
RA
RELIEF VALVE B
Spring
Orifice 1
RA
Spool
RELIEF VALVE B
2-74
Spring
Chamber 1
Orifice 2
Chamber 2
145Z9A2TM06
145Z9A2TM07