Great Plains YP825AR Operator Manual - Manual (Page 40)

36 YP825AR Table of Contents Index Great Plains Manufacturing, Inc.
401-923M Table of Contents Index 2014-06-17
Field Lower and Marker Unfold
This sequence presumes that the planter is raised to
field lift position, the LIFT switch is set to HALF, and (if
installed and enabled by shut-off valve) a marker is
deployed.
4. Move the circuit lever to Retract the lift cylinders.
Normal Sequence:
• Opener frame lowers.
• A marker unfolds (if installed and enabled).
Wait for both actions to complete, then
set the circuit lever to Neutral.
Marker Operations
It is not possible to operate the markers other than during
a field lift or field lower (page 35). If the Lift/Lower steps
are followed, one marker alternately folds on one side at
each lift, and the other unfolds at each lower.
Dual Marker Operations
It is possible to deploy markers on both sides. This might
be needed for special field passes, but can also occur
inadvertently if a lift/lower is interrupted.
Two Markers Out
1.
Perform a normal field lower/marker deploy (previous
topic).
2. When the lowering stops, with the marker fully
unfolded, briefly reverse the lever to Extend (lift), then
back to Retract (lower).
3. The marker on the opposing side deploys. Hold at
Retract until the marker is fully unfolded.
Folding From Two Markers Out
With two markers out, the next lift operation folds only
one of them (the second one deployed). To fold the other
marker, use either of two techniques:
• Perform a second lower, then a lift, or
• At full fold of the first marker, perform a brief Extend,
then a Retract, to fold the other marker (and continue
frame lift).
Figure 35
Lower: Planter Lowered
34705
34804
HALF OFF OFF OFF OFF
OFF
FULL ON ON ON ON
LIFT TELESCOPE ROTATE FRAME
LOCK
LIFT
LOCK POWER
ON OFF
3
Overhead, Crushing and Sharp Object Hazards:
Do not allow anyone to stand under, near or beyond the end of
opener frame during marker operations. There is risk of
serious injury or death for anyone under the frame or in the
path of a marker. Marker arms are heavy, are under
tremendous hydraulic power, and may move suddenly if the
hydraulic system is damaged or needs bleeding. Marker discs
may be sharp.