Great Plains 1205NT Material Rate - Manual (Page 4)

Great Plains Mfg., Inc.
2
150-131B 04/12/2007
Position Seed Cup Doors
Refer to Figure 3,
which depicts the seed cup door handle in position
.
At each seed box seed tube, adjust the seed cup door
handle
for the seed size.
The handle has three normal operating position
detents:
Note: Handle position is used for cleanout, not plant-
ing. If set to this position with seed loaded, it may
be difficult to reset it to a normal operating posi-
tion.
Checking Main Box Seed Rate
Note: For drills built after October 1, 2005,
use the gauge wheel tire or supplied calibration
crank to calibrate.
For drills built before October 1, 2005,
use the gauge wheel to calibrate or order the cal-
ibration crank kit available through your Great
Plains Dealer.
1. To calibrate, use either the left hand gauge wheel
or the supplied calibration crank. If using the cali-
bration crank, attach crank to coupler on gauge
wheel jackshaft with retaining pin and disengage
lockout on drive wheel.
2. Rotate left hand gauge wheel or calibration crank
to see that feed cups and drive are working prop-
erly and are free from foreign matter.
3. To adjust seeding rate, decide which drive type
(gearbox) setting you need from the seeding
charts beginning on page 4. Set the gearbox.
Rotate drive tire or calibration crank a few turns to
confirm gearbox has engaged.
4. Record weight of an empty container large enough
to hold seed metered for one acre.
5. Place several pounds of seed over three seed
cups on an outside end of drill box. Pull seed
tubes off of these three openers.
(top detent) is for the smallest seeds.
Use it for wheat and similar small seeds.
(middle detent) is for larger seeds.
Use it for soybeans and similar larger seeds.
(bottom detent) is for oversize or fragile seeds.
If you experience excessive cracking with
setting
, use setting .
4
3
Figure 3
Seed Cup Door Handle
26211
1
5
2
3
4
1
2
3
2 3
5
Figure 4
1205NT Calibration Crank
23386