Hyundai HX140L, Manual

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2-38
SWING PRIORITY FUNCTION
During swing priority operation, the pilot secondary pressure is supplied to the port Pc3 of the
spring side of the swing priority spool and shift swing priority spool in the right direction.
The hydraulic fluid from P2 parallel passage flows into the parallel passage of arm 1 side through
swing priority spool and the path "A" and also flows into the boom 2 spool.
When the swing priority spool is neutral condition, the passage is same as normal condition. But
due to shifting of the swing priority spool, the fluid from pump A1 flows to swing side more then the
boom 2, arm 1, option B and dozer spools to make the swing operation most preferential. 8)
Arm 2 spool
Boom 2 spool
Swing priority spool P2 Parallel passage Path "A"
Swing priority
pilot pressure
From RCV
Pc3
140L2MC27
Arm 2 spool