Great Plains 2N-3010 Material Rate - Manual (Page 3)

9/22/2004 196-126B
Great Plains Mfg., Inc. 3
Setting the Seeding Rate
Calibrating the seeding rate requires four steps: shifting the
speed-change gearbox, adjusting the seed-rate handle,
setting the seed-cup doors, and checking the seeding rate.
Check the seed-rate charts starting on page 5 or in the drill
boxes. These charts list the proper settings for the speed-
change gearbox and seed-rate handle for various seeds
and seeding rates.
The seed-rate charts are based on cleaned, untreated
seed of average size and test weight. The rates are based
on 11L x 15 8-ply rib implement tires and 265/70B16 skid
steer tires. Many factors will affect seeding rates including
foreign material, seed treatment, seed size, field condi-
tions, tire pressure and test weight. Minor adjustments
likely will be needed. Set and check the seeding rate using
the procedures below, then re-adjust the rate as necessary.
Before setting the seeding rate, rotate both gauge wheels
to see that the seed cups and drive are working properly
and free from foreign material.
Note: Each drill box has its own metering mechanism. After
adjusting and checking the rate on one box, set the same
rate on the other box.
Refer to Figure 1
1. Shift Speed-Change Gearbox
The speed-change gearbox is designed to give you a
variety of speeds for different seeds and seeding rates.
You can shift between four different drive types.
Refer to the seed-rate charts for the correct drive type–
1, 2, 3 or 4. Move the selector handle on the gearbox
until the correct number appears in the handle window.
Rotate the tires a few turns to confirm the gearbox has
engaged.
Figure 1
Speed-Change Gearbox
12916
Gearbox Ratios:
Drive Type 2 is 2.06 Times Faster Than 1
Drive Type 3 is 3.08 Times Faster Than 1
Drive Type 4 is 5.03 Times Faster Than 1