Great Plains YP825AR Operator Manual - Manual (Page 39)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 35
2014-06-17 Table of Contents Index 401-923M
Field Lift/Lower
These instructions presume that the planter is already
unfolded from transport configuration, and is in the full
field lowered position. If not, see “Unfolding the
Planter” on page 27.
Planter raising and lowering relies on two lift cylinders,
which share the lift circuit with markers (if installed)
circuit. If the marker shut-off valve is open, markers
alternately operate at each field lift/lower.
Prepare Markers for Lift/Lower
If markers are not installed, continue at “Field Lift
(Initial, no Marker Out)” or “Field Lower and Marker
Unfold”.
Refer to Figure 33
If markers are not required for the immediate field
operations, verify that the marker shut-off value is closed
(handle at right angle to valve body), and continue at
“Field Lift (Initial, no Marker Out)” or “Field Lower and
Marker Unfold”.
1. With the planter fully lowered, open the marker
shut-off valve.
Field Lift (Initial, no Marker Out)
Refer to Figure 34
2.
At the frame control switch box,
set the LIFT switch ( , green) to HALF.
Move the circuit lever to Extend the lift cylinders.
Normal Sequence:
• Opener frame rises.
• A limit switch stops lift movement at field lift.
Set the circuit lever to Neutral.
Note: Leave the LIFT switch in HALF position for normal
planting passes.
Field Lift and Marker Fold (End of a Pass)
This sequence presumes that the planter is lowered to
field position, the LIFT switch is set to HALF, and (if
installed and enabled by shut-off valve) a marker is
deployed.
3. Move the circuit lever to Extend the lift cylinders.
Normal Sequence:
• Deployed marker folds.
• Opener frame rises.
• A limit switch stops frame lift movement at field lift.
Wait for both actions to complete, then
set the circuit lever to Neutral.
Figure 32
Planter at Field Lowered
34804
Crushing and Unexpected Marker Movement Hazards:
Never open the marker shut-off valve unless the planter is fully
lowered. Opening the valve with the planter raised may result
in immediate planter lowering and marker deployment if the is
equipment damage or malfunction. See page 26 for details.
Figure 33
Marker Shut-Off Valve
34707
CLOSED OPEN
3
Figure 34
Fold: Planter at Field Lift
34705
tbd
HALF OFF OFF OFF OFF
OFF
FULL ON ON ON ON
LIFT TELESCOPE ROTATE FRAME
LOCK
LIFT
LOCK POWER
ON OFF
3