Great Plains NTA3007HD Operator Manual - Manual (Page 80)

76 NTA907HD or NTA3007HD
166-207M 04/04/2011
Seed Meter Final Drive Range
Refer to Figure 80 and Figure 81
The meter flute shaft
is driven by the agitator shaft
through a pair of interchangeable gears , . The posi-
tioning of these gears creates two final drive ranges.
Each seed rate chart is based on a specific Final Drive
Range. The Ranges are:
• “High” range, which is used for larger seeds and
higher seeding rates
• “Low” range, which is used for smaller seeds and
lower seeding rates
The meter shafts are labeled “DRIVING” and “DRIVEN”.
The “DRIVING” shaft is the upper forward shaft.
The “DRIVEN” shaft is the lower rear shaft.
Refer to the Seed Rate chart (or Fertilizer Rate chart),
the table below, and Figure 80 and Figure 81 for setting
the seed meter final drive range.
1. Remove the pins from the ends of both shafts.
2. Remove and position the gears as shown in the table
above.
3. Secure with pins.
Disable a Seed Meter
To avoid operating a meter:
1. Remove a final range gear and leave it off.
2. Set the variable rate gearbox to zero.
These step are recommended even when the unused
hopper is empty, to:
• reduce gearbox and meter wear
• during calibration, to avoid clogging air tubes at the
meter not under test, and;
• avoid metering undesired material in the field.
FINAL DRIVE
RANGE
DRIVING DRIVEN
LOW RANGE 17 Tooth Small 54 Tooth Large
HIGH RANGE 54 Tooth Large 17 Tooth Small
Null4:
Figure 80
Low Final Drive Range
26368
2
1
3
4
Null4:
DRIVING
Null4:
DRIVEN
1 2
3 4
Null4:
Figure 81
High Final Drive Range
26369
5
5
Null4:
DRIVING
Null4:
DRIVEN
5