wsm L503 Workshop Manual page 195

L3130 · L3430 · L3830 · L4630 · L5030, WSM
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.
(1) Nut
(2) Adjuster
(3) Spring
(4) Poppet
(5) Plug
(6) Stopper Plate
(7) Clutch Valve
3-M21
TRANSMISSION
(8) Low-pass Valve
(9) GST Clutch
(10) Proportional Reducing Valve
(A) IN-Port
(B) OUT-Port
W1020861
KiSC issued 02, 2007 A