wsm STW37 Workshop Manual page 391

STW34, STW37, STW40, WSM
 Single / Double Acting Valve – Lift (Single Acting)
When this valve is used in single acting mode, the
selecting valve (2) is turned clockwise to open the
passage from selecting valve (2) to transmission case.
When the spool (4) moves to left, the oil passage
from P port to PB port is blocked by the spool (4). The
pressure-fed oil in the P port opens the check valve (1)
and flows to implement cylinder via A
(1) Check Valve
(2) Selecting Valve
(3) Single Acting Cylinder
(4) Spool
 Single / Double Acting Valve – Down (Single
Acting)
When the spool (4) moves to right, the oil passage
from P port to PB port is blocked by the spool (4). The
pressure-fed oil in the P port opens the check valve (1)
and flows to transmission case through selecting valve
(2). The return oil from implement cylinder flows from A
port to the transmission case through T port.
(1) Check Valve
(2) Selecting Valve
(3) Single Acting Cylinder
(4) Spool
8-M21
HYDRAULIC SYSTEM
port.
1
P: P Port
(From Hydraulic Pump)
T: T Port
(To Transmission Case)
A : A Port
1 1
(To Implement Cylinder)
B : B Port (Plugged)
1 1
9Y1211109HYM0027US0
P: P Port
(From Hydraulic Pump)
PB: PB Port
(To Control Valve)
T: T Port
(To Transmission Case)
A : A Port
1 1
(From Implement Cylinder)
B : B Port (Plugged)
1 1
9Y1211109HYM0028US0
KiSC issued 11, 2014 A
1