Kubota WSM L3560, Workshop Manual

Page: 293 / 801

TRANSMISSION
L3560, L4060, L4760, L5060, L5460, L6060, WSM
3-M17
Low-pass Valve
After completion of the gear shifting, the low-pass
valve (8) opens immediately to flow oil into the GST
clutch (9), to promote the engagement of the clutch.
When the gear shifting starts, the oil in the GST
clutch (9) passes the clutch valve (7) to be drained into
the tank. So prior to beginning of the GST clutch
connection and after completion of gear shifting, it is
necessary to flow oil to the GST clutch quickly. It is the
low-pass valve that does this operation with the
proportional reducing valve (10) simultaneously.
The oil from the regulating valve flows in from the
IN
-port
(A)
, passes through the low-pass valve poppet
(4), flows out from
OUT
-port
(B)
, and flows to the clutch
valve (7) and clutch (9). When the pressure on the side
of the
OUT
-port
(B)
reaches setting pressure, the poppet
(4) pushes the spring (3) to close the circuit.
9Y1210824TRM0022US0
(1) Nut
(2) Adjuster
(3) Spring
(4) Poppet
(5) Plug
(6) Stopper Plate
(7) Clutch Valve
(8) Low-pass Valve
(9) GST Clutch
(10) Proportional Reducing Valve
(A) IN-Port
(B) OUT-Port
KiSC issued 03, 2016 A