Great Plains 1005NT Operator Manual - Manual (Page 16)

14
Section 3 Adjustments
705 and 1005 End-Wheel No-Till Drill 150-213M 4/12/05
Great Plains Mfg., Inc.
Opener Down Pressure
Each opener spring can be adjusted individually for down
pressure. This is useful when penetrating hard soil and for
seeding in tractor tire tracks. To adjust opener down pres-
sure, remove W clip at bottom of spring. Place W clip in a
higher hole for greater down pressure or in a lower hole for
less down pressure. See Figure 3-5.
Figure 3-5
Opener Spring Length
Seeding Rate
Calibrating the seeding rate requires four steps:
1. arranging the drive sprockets,
2. setting the seed-rate handle,
3. positioning the seed-cup door, and
4. checking the seeding rate.
Refer to the seed-rate charts starting on page 16. These
charts list the proper sprocket sizes 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 9.00 x 24 rib implement tires. Many factors will affect
seeding rates including foreign material, seed treatment,
seed size, field conditions, tire pressure and test weight.
Minor adjustments likely will be needed. Set and check the
seeding rate using the procedures below, then adjust the
rate as necessary.
11836
10129
Minimum Pressure
Maximum Pressure
Arrange Drive Sprockets
Refer to the seed-rate charts for the correct drive type–1,
1A, 2 or 2A. Figure 3-6 shows the sprocket arrangement
for each drive type.
Figure 3-6
Drive Types
To change the drive types, refer to Figure 3-7.
1. Loosen nut (1) holding idler arm. Turn arm so chain is
slack. Remove chain from sprockets.
2. Rearrange sprockets (2) and plastic spacers (3) on
front shaft so correct front and rear sprockets are
aligned.
3. Slide idlers on idler arms so idlers are aligned with
correct sprockets. Reinstall chain.
4. Turn idler arm as indicated by drive type to remove
slack from chain. Retighten nut that holds idler arm.
Figure 3-7
Sprocket Box
17460
1
2
3
18971