Kubota WSM STa-30 Workshop Manual page 295

STα-30, STα-35, WSM
(2) Single Action
Between B port (11) and T port (3) passage is
1
opened by rotary valve (4) of selector lever.
(When spool is moved to LH (When Lifting))
When the spool (7) is moved, the PB port (13) is
closed. The pressured oil open the check valve (1) and
into the valve through the P
flow shows as follow.
Port (10) → A
P
1
(1) Check Valve
(2) B Outlet
1
(3) T Port
(4) Rotary Valve
(5) Single Action Cylinder
(6) A Outlet
3
(7) Spool
(When spool is moved RH (When Lowering))
When the spool (7) is moved, the PB port (13) is
closed. The pressured oil open the check valve (1) and
into the valve through the P
The pressured oil flow shows as follow.
Port (10) → B
P
1
Port (3) → Transmission Case
The oil from A
3
through the A port (9) and T
1
(1) Check Valve
(2) B Outlet
1
(3) T Port
(4) Rotary Valve
(5) Single Action Cylinder
(6) A Outlet
3
(7) Spool
9-M17
HYDRAULIC SYSTEM
port (10). The pressured oil
1
Port (9) → A
Outlet (6)
1 3
(8) T Port
1
(9) A Port
1
(10) P Port
1
(11) B Port
1
(12) T Port
2
(13) PB Port
port (10).
1
Port (11) → Rotary Valve (4) → T
1
outlet (6) flow to transmission case
port (8).
1
(8) T Port
1
(9) A Port
1
(10) P Port
1
(11) B Port
1
(12) T Port
2
(13) PB Port
KiSC issued 11, 2006 A
W1018824
W1019018