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WSM U15-3
3. Travel Unloading function
Pp
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
P1
P2
P
(1) Bucket
(2) Boom
(3) Travel Left
(4) Supply
(5) Travel Right
(6) Arm
(7) Service
(8) Confluence
(9) Swivel
(10)Dozer
(11)Swing
With the unload lever being raised, oil of P1 and P2 flows from the supply section directly to the return circuit
and results in no functions of P1 and P2 pump, from bucket (1) to service port (7) except pump 3 circuit.
When the unload lever is lowered, the supply section opens to supply oil of P1 and P2.
II-105
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