Great Plains 2SF30 Operator Manual - Manual (Page 32)

28 2SF24/30 Table of Contents Index Great Plains Manufacturing, Inc.
155-015M-A Table of Contents Index 2014-01-09
Marker Operations
It is not possible to operate the markers other than during
a field lift or field lower. 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).
Acremeter Installation
Refer to Figure 23
The acremeter is factory installed. It is located on the left
end of the left main drive shaft.
If the acremeter has been removed, screw the threaded
end of the meter into the
1 ⁄
2
-20 tapped hole in the left
end of center main drive shaft.
Tighten the threaded end only enough to prevent it from
working loose from normal vibration. In use, there is no
torque or tension that might tend to unscrew it.
The acremeter counts shaft rotations whenever the shaft
is rotating - normally this is only with the drill unfolded,
the opener sub-frame lowered, and the drill in motion.
The meter is geared to display rotations as acres, when
using factory-specified tires and inflations.
Tally field acres by noting the meter reading prior to, and
after planting. Subtract the starting from the ending
readings.
“Acremeter Operation” on page 29
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.
Figure 23
Electronic Acremeter Installation
27000