--------------SECTION
A
1.
Draft
Control lever 3. Position Control lever
2. Adjustable stop
mowers, etc.,
th.at
operate above the
ground.
Posi-
tion Control
can
also
be
used
with ground
engag-
ing
equipment
which
must maintain a constant
depth regardless of
the
draft load.
All
tractors have a
dual
lever system, i.e
.•
a
sepa-
rate lever for Draft
and
Position Control func-
tions. See Figure
24.
The
Draft and Position Control levers
are
used
to
raise or lower the three-point linkage (and
implew
ment) to the required height or working
depth.
Before
operating
the
hydraulic three-point link-
age
the
auxiliary
services control valve knob
(if
fitted) must
be
correctly
set.
The auxiliary
serv-
ices control valve
(A.S.C.
valve) directs oil
to
the
three-point
linkage,
to
external cylinders or
both
together.
To
operate the three-point
linkage,
push
the
A.S.C. valve knob fully in (rearward).
See
Figure
25.
Pull the A.S.C. valve
knob
fully out (forward)
to
operate external services only.
25.Hydraullc Flow Control and
A.S.C.
Valve
1.
A.S.C. valve knob
2.
Flow control valve knob
The
midway position
is
selected to operate
the
three-point linkage and external cylinders simul-
~eously.
See
OPERATING
REMOTE
CYLIN-
DERS
WITH
THE
A.S.C.
VAL
VE
in this section
of the manual.
A
WARNING:
Do
not
transport
or
attach
411A
equipment
when
the
hydraulic
system
is
in
Draft
Control.
Use
Position
Control/or
these
operations.
Always
lower
hydraulic
equipment
to
the
ground
before
stopping
the
tractor.
Upper Link Draft Control Operation
Move
the Draft Control lever in the quadrant
to
find
the point near the center
where
the lift links
neither raise nor lower.
This
is the neutral point.
Lower the implement
into
work using the Draft
Control lever.
Push
the lever forward
to
increase
the
draft loading. Pull rearwards
to
reduce the
draft loading.
In
most circumstances, forward
movement
of
the
Draft Control lever will increase
implement depth
and
rearward movement will re-
duce
the
depth.
Once
set, the tractor hydraulic system
will
auto-
matically adjust the implement depth
to
maintain
an
even
pull
on
the tractor
and
so
reduce wheel
slip
to
a
minimum.
21
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