Hyundai HX145 LCR, Manual

Page: 126 / 702

2-74
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.
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.
-
-
RB
RA
Spring
Chamber 3
RELIEF VALVE B
RB
RA
Chamber 2
Plunger
Orifice 1
Spring
Orifice 2
Chamber 1
Spool
RELIEF VALVE B
145Z9A2TM06
145Z9A2TM07