Kubota LA525, Руководство по ремонту

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FRONT LOADER
LA525, LA765, WSM
1-M7
(3) Down
1. When the hydraulic control lever is set to the "DOWN" position, the spool (3) moves to the right. This makes oil
passages between passage 1 (7) and A1 port, also between B1 port and PB passage 1 (4).
2. As the oil passage from the neutral passage 1 (5) to the PB passage 1 (4) is closed by the spool (3), the
pressure-fed oil from the P port opens the load check valve (6) and flows through the notched section of the spool
(3) and A1 port to retract the boom cylinder (8).
3. Return oil from the boom cylinder (8) flows from the B1 port through the passage in the spool (3) and PB passage
1 (4) to the bucket control section (2).
9Y1211014FLM0007US0
(1) Boom Control Section
(2) Bucket Control Section
(3) Spool
(4)
PB Passage 1
(5) Neutral Passage 1
(6) Load Check Valve
(7) Passage 1
(8) Boom Cylinder P: P Port
T: T Port
A1: A1 Port
(To Boom Cylinder)
B1: B1 Port
(From Boom Cylinder)
PB: PB Port
(a) Low Pressure
(b) High Pressure
KiSC issued 06, 2017 A