Great Plains NTA 2000 export model Assembly Instructions - Manual (Page 10)

148-679M 5/9/2007
Great Plains Mfg., Inc.
Small Seeds Option 10
Calibrations for Number of Turns
As indicated at the start of this section, accuracy
in calibration can be affected by a number of fac-
tors not least of which is soil type, wheel slip and
sinkage. The number of turns recommended for
the calibration crank handle are based on “aver-
age” figures in normal field conditions. If farm
conditions are very stony (so little sinkage) or very
sandy (so greater sinkage) then using the recom-
mended number of crank handle turns may be
inaccurate.
To check the number of turns for individual field
conditions:
Refer to Figure 20
1. Shut down the shut-off slide above each roller
to prevent seeding.
2. Fill the small seeds box half to two-thirds full
of seed.
3. Mark out 218 feet of seedbed.
4. Position the calibration handle on the Variator
input and rotate to the upright (12 o’clock) po-
sition to give a clear starting point.
5. Drive the distance marked-off in the seedbed
and count the number of turns the calibration
handle makes.
6. Note the number of turns and use this figure
in the Checking the Seeding Rate procedure
in the previous section in place of the stand-
ard.
Note: Many small and light weight seeds do not
flow well, therefore Great Plains highly recom-
mends the use of talc lubricant with all seeds. It
may also be necessary to add talc lubricant to the
box sides and seed hoses. For proper talc lubri-
cant contact your Great Plains dealer and ask for
talc lubricant P/N: 821-046C.
19934
Figure 20
Individual Shut Off
Talc Lubricant (P/N: 821-046C)
IMPORTANT!
All talc is not created equal, use Great Plains brand talc
for optimum seed flow.
Talc lubricant is mandatory for all seeds, especially
treated or inoculated seed.
Recommended usage:
For clean seeds sprinkle (1) one cup of talc per 3
bushels of seed.
For seed with excessive treatment, or for humid planting
environments, double or triple talc rate as needed.
!
CAUTION!
Do not use hands or any part of your body to mix talc
lubricant.