Great Plains 3N-4020 Operator Manual - Manual (Page 42)

38 3N-4010F/3N-4010HDF/3N-4020F Table of Contents Index Great Plains Manufacturing, Inc.
196-359M Table of Contents Index 2013-10-29
Hydraulic Drive Field Operations
Refer to Figure 37
1. Turn on Controller Console by pressing the ON/VR
button. Green light above ON/VR button illuminates
when power is on.
Pressing the ON/VR button twice puts the unit in VR
mode. VR appears on the screen along with the Rate
from the recipe or sent from your GPS. Press ON/VR
button again to toggle back to manual mode. (Mode
and rate changes take effect with the release of the
button.)
2. To change rates manually whether in Manual or in
VR mode, simply touch the
⇑ / ⇓ arrow buttons. This
changes the Controller to the rate you select manu-
ally. To return to VR, simply touch the ON/VR button
to toggle back to VR mode.
3. Before planting, conduct a seed rate Calibration
(page 39) and ground speed Calibration (page 51).
4. Engage the hydraulic flow by pushing FORWARD on
the tractor remote hydraulic lever. The remote lever
must be LOCKED OPEN in this position to provide
constant flow to the drive motor.
John Deere tractors with Sound-Gard® body:
Use lever lock clip to lock lever forward. See your
tractor dealer for lock purchase and installation.
John Deere 7000 Series tractors: Rotate valve
detent selector to motor position to lock lever in for-
ward position.
John Deere 8000 Series tractors: Set timer to con-
tinuous. Push lever forward until detent clicks.
Case-IH Magnum tractors: Lock lever forward in
detent position. You may need to turn up detent pres-
sure to its maximum setting. Do not tie hydraulic
lever past detent position with a strap. See your trac-
tor dealer for details.
Other tractors: Lock lever forward in detent position.
You may need to turn detent pressure to maximum
or use a mechanical detent holder to hold lever for-
ward. See your tractor dealer for proper means of
providing constant flow.
5. Press ENGAGE button to activate drive. Green light
above ENGAGE button illuminates.
Note: If you do not move within 10 seconds, the auto-
matic disengagement feature disengages the
drive. To begin planting again, press ENGAGE.
6. The Console display shows two numbers while oper-
ating: “Set” rate is the rate you tell the system to
plant, and the “Out” rate is the calculated rate based
on the actual rotations of the drive. The “Out” read-
ing is monitoring the drive system; it isn’t monitoring
population. It verifies that the drive system is func-
tioning properly.
Note: The “Out” readings normally fluctuates within 5%
of the “Set” rates. This fluctuation is evidence of
the drive system compensating for normal varia-
tions in ground speed.
7. If “Out” rate varies from the “Set” rate by more than
20%, an audible alarm sounds.
8. If Controller is powered directly from the battery or
via unswitched power port, make sure to power Con-
sole off when tractor is shut down, in order to prevent
tractor battery drain.
When calibrating, make sure that you choose a calibra-
tion speed that is representative of your average planting
speed.
Figure 37
VR (Variable Rate) Mode
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