Great Plains 3P605NT Material Rate - Manual (Page 3)

Great Plains Mfg., Inc.
1
05/18/2007 151-061B
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 9.5Lx15 tires for the 605NT drills and
5.70 x 8 tires for the 3P605NT 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 9, then adjust the rate as neces-
sary.
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.
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 2.1 Times Faster Than 1
Setting 3 is 3.1 Times Faster Than 1
Setting 4 is 5.1 Times Faster Than 1
Figure 1
Gearbox Handle Adjustment
18476
1
2
1
2