Great Plains ADC2350BE Operator Manual - Manual (Page 65)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 61
2012-08-01 Table of Contents Index 167-085M
Seed Meter Final Drive Range
Refer to Figure 68 and Figure 69
The meter flute shaft
is driven by the agitator shaft
through a pair of interchangeable gears , . The
positioning 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 two seed 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 68 and Figure 69 for setting
the seed meter final drive range.
1. Remove the lynch pins from the ends of both
shafts.
2. Remove and position the gears as shown in the table
above.
3. Secure with lynch pins.
Setting Variable Rate Gearbox
The variable rate gearbox allows you to infinitely vary the
meter drive speed to attain a wide range of seeding
rates. The ratio of gearbox input speed to output speed is
controlled by the position of a gearbox control arm. The
control arm has an indicator that points to a scale
marked in degrees. The Seed Rate and Fertilizer Rate
charts show the rate for each degree of the control arm
rotation.
Refer to the seed rate charts and set each variable rate
gearbox control arm to its scale setting for the desired
seeding rate. With the optional servo-controlled meters,
the rate is set via the seed monitor terminal.
To adjust the Variable Rate Gearbox for each hopper:
Refer to Figure 70
1.
Remove the hairpin cotter securing the gearbox
adjustment crank.
2. Rotate crank until the control arm indicator points to
the scale setting that matches the rate from the Seed
Rate chart or determined by calibration.
FINAL DRIVE
RANGE
DRIVING DRIVEN
LOW RANGE 17 Tooth Small 54 Tooth Large
HIGH RANGE 54 Tooth Large 17 Tooth Small
Figure 68
Low Final Drive Range
26368
2
1
3
4
DRIVING
DRIVEN
1 2
3 4
Figure 69
High Final Drive Range
26369
5
5
DRIVING
DRIVEN
5
Figure 70
Variable Rate Gearboxes
26306
1
2
3