Great Plains NTA2007HD Operator Manual - Manual (Page 56)

52 Great Plains Manufacturing, Inc. Contents Index NTA607/2007HD
166-283M Contents Index 04/04/2011
Calibration Crank, Bag and Scale
Refer to Figure 46
Under the right end of the walkboard, the drill includes a
calibration crank
, calibration bag, and digital scale.
The bag and scale are stored in a compartment , held
closed by the crank. A hook is provided for weighing.
The hand crank is provided for manual operation of the
meters (the meters otherwise turn only when the drill is
lowered and in motion). The crank is used for two com-
mon tasks:
• calibration of the meter setting for planting, and
• clean-out of the meter flute chamber.
Calibration Crank Safety Information
Moving Chain Hazard:
Keep all persons except operator away from drill mainframe
during crank operations. Body parts and clothing can get
caught in chains, sprockets and gears, causing serious injury.
When operating the crank, all parts of the contact drive system
are in motion, including parts out of sight of the operator.
Machine Damage / Invalid Results Risks:
Rotate the hand crank only in the counter-clockwise direction.
Operating in reverse can damage the meter gear box, and
produces low sample sizes leading to incorrect calibration and
excessively high field rates.
Operating the Hand Crank
1. Turn on the seed monitor. This step is required if the
Variable Rate option is installed.
2. Raise drill (page 37). This prevents the contact drive
wheel from engaging the transport tire.
Note: Although the crank can be operated with the con-
tact drive engaged, it requires extra effort to over-
ride a ratchet coupling.
Refer to Figure 47 (note: Figure 47 exaggerates size of crank-
ing directional decal)
3.
Un-pin crank from storage location, and place over
hex shaft at cranking location (right side of cart,
between rear-most gearbox and transport wheel).
4. For meter clean-out, set both meters 80 or higher
(LOW range), or 10 or higher (HIGH RANGE).
For calibration, set the final Range gears, and the
meter under test per the instructions in the Seed
Rate Manual, and remove a DRIVER or DRIVEN
final Range gear on the other meter.
Null4:
Figure 46
Hand Crank in Storage
31170
1
2
3
1
2
3
Null4:
Null4:
Null4:
Note: During clean-out, if a variable rate gearbox is set to
“0”, operating the hand crank may fail to clear the
meters of seed.
Figure 47
Hand Crank Operation
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