Installation Instructions
II
Neutral
Oil forced
into
the
control valve
through
the
P
port
pushes open
the
unload
poppet
(4) and
then
returns
to
the
transmission
case
through
the
T1
port.
Oil behind
the
unload
poppet
(4) returns
to
the
transmission
case
through
the
spool
(3)
and
the
T3
port.
Since
the
poppet 2 (1) and
poppet
1
(2)
are closed,
oil in the hydraulic
cylinder
does
not
flow
to
the
transmission
case.
Thus,
the
implement
remains
at
its fixed position.
II
Lift
When
the
control lever
is
set
to
the
LIFT
position,
the spool
(3)
is
move
to
the
right.
The oil forced
into
the
control valve
through
the
P
port
flows
to
the
back
of
the
unload
poppet
(4)
to
close it.
The oil pushes open
the
poppet
1 (2), and flows
into
the
hydraulic cylinder
through
the
C
port
to
lift
the implement.
8 HYDRAU
L1C
SYSTEM
[4]
POSITION CONTROL VALVE
This position control valve
is
located under
the
hydraulic cylinder block.
,)0
P:
Pump Port
c:
Cylinder Port
(1)
Poppet 2
(2)
Poppet 1
3
B177F807
P:
Pump Port
C:
Cylinder Port
(1) Poppet 2
(2)
Poppet 1
B1700·B2100·B2400 WSM,11770
Tl,
T2,
Ta: Tank Port
(3)
Spool
(4) Unload Poppet
Tl,
T2,
Ta
: Tank Port
(3) Spool
(4)
Unload Poppet
B177F808
3
4
8-M4