Great Plains ADC2250 Operator Manual - Manual (Page 22)

20
Section 3 Adjustments
Model 2250 Air Drill Cart 167-033M 7/28/10
Great Plains Mfg., Inc.
Section 3
Adjustments
Setting the Drill Seeding Rate
!
CAUTION!
Obey manufacturer/grower’s reccomendations for safety equip-
ment when using treated seeds.
Three settings control the seed rate, they are:
•
Metering device driving/driven gear set orientation
•
Gearbox settings
•
Quick change sprocket orientation
When setting the seed rate make sure that all three set-
tings are properly made.
1. Check the seed rate charts, starting on page 23, or the
seed rate chart located on the bin, for desired settings.
Not all ratios are on the chart on the bin. Consult this
manual for all possible settings.
2. Set driving/driven gears as indicated under the “Gears”
column in the seed rate chart. The driving gear is on the
front or upper shaft. The driven gear is on the rear or low-
er shaft. Remove the lynch pins and adjust gear position
as needed, then replace the pins, refer to Figure 3-1.
3. Set the gearbox levers to the required position listed
under the Gearbox Levers column in the Seed Rate
Chart starting on page 25.
IMPORTANT: Always disengage the gearbox clutch han-
dle before attempting to shift gears. Failure to do so will re-
sult in damage to the gearbox.
Disengage the gearbox clutch handle by releasing
from the catch and pushing in, refer to Figure 3-2.
Move shift levers until they are in detents next to appro-
priate letter or number. Shift levers should move freely,
refer to Figure 3-3. If levers do not move easily be sure
the clutch handle is pushed in. Use the hand crank to
turn the drive train slightly and relieve binding.
NOTE: Seeding Rate Charts on the drill and in this
manual are derived from cleaned, untreated seed of
average size and test weight. The rates are based on
23.1 x 26” 12-ply tubeless tires. Many factors will af-
fect seeding rate including foreign material, seed
treatment, seed size, and test weight. Minor adjust-
ments will likely be needed to compensate for these
factors.
Driving/Driven Gears
Figure 3-1
14882
Driven
Driving
Clutch Handle Engagement
Figure 3-2
14880
Disengage
Engage
Gearbox Shift Levers
Figure 3-3
14883