Kubota WSM STa-30, Workshop Manual

Page: 294 / 359

9-M16
ST
α
-30, ST
α
-35, WSM HYDRAULIC SYSTEM
(When spool is moved to RH)
When the spool (5) is moved, the PB port (11) is
close. The pressured oil open the check valve (2) and
into the valve through the P
2
port (8).
Pressured oil flow shows as follow.
P
2
port (8)
→
B
2
port (9)
→
B
2
outlet (3)
The A
2
port (7) and T
1
port (6) are opened.
The oil from the A
2
outlet (4) return to the
transmission case through A
2
outlet (4), A
2
port (7) and
T
1
port (6).
W1018283
■
Single / Double Acting Valve (A
1
and B
1
Outlet)
(1) Double Action
Between B
1
port (7) and T port (2) passage is closed
by rotary valve (3) of selector lever. So, it is same
function with double acting valve (A
2
and B
2
outlet).
W1018702
(1) Double Acting Cylinder
(2) Check Valve
(3) B
2
Outlet
(4) A
2
Outlet
(5) Spool
(6) T
1
Port
(7) A
2
Port
(8) P
2
Port
(9) B
2
Port
(10) T
2
Port
(11) PB Port
(1) Check Valve
(2) T Port
(3) Rotary Valve
(4) Single Action Cylinder (5) A
1
Port
(6) P
1
Port
(7) B
1
Port
(8) PB Port
KiSC issued 11, 2006 A