Great Plains 2000 Material Rate - Manual (Page 3)

Great Plains Mfg., Inc.
1
05/30/2008 118-389B
Main Seed Box Planting
Calibrating the seeding rate requires four steps:
1. selecting one of four drive types,
2. setting the seed-rate handle,
3. positioning the feed-cup door, and
4. checking the seed rate.
Refer to the seed rate charts beginning on page 4.
These charts list the proper drive type and seed-rate-
handle settings 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 9.5L x 15 rib implement gauge-wheel tires on
the 12- and 15-foot drills and 11L x 15 rib implement
tires on the 20-foot drills.
Many factors affect seeding rates, including foreign
material, seed treatment, seed size, field conditions, tire
pressure and test weight. Minor adjustments are likely
to be needed. Set and check the seeding rate using the
procedures beginning on page 12, then adjust the rate
as necessary.
Select Drive Type
Refer to Figure 1
The gearbox is designed to give you a variety of drive
speeds for different types of seeds and rates. It is a lin-
ear shift pattern design with constant mesh gearing
and totally sealed to keep the dirt out. No lubrication is
required unless service is needed.
Note: If your drill has more than one gearbox, make
sure both are shifted to the same drive type.
To set the gearbox move the selector handle until
the desired drive type appears in the window on the
handle.
Gear Box Ratios
Setting 2 is 2.06 Times Faster Than 1
Setting 3 is 3.08 Times Faster Than 1
Setting 4 is 5.03 Times Faster Than 1
Figure 1
Gearbox Handle Adjustment
12095
1
2
1
2