Great Plains NTA 2000 export model Assembly Instructions - Manual (Page 9)

5/9/2007 148-679M
Great Plains Mfg., Inc.
9 Installation Instructions
Refer to Figure 17
3. Remove calibration tray (a) from storage position
above the feed rollers by loosening center knob (b)
and sliding lock tab down.
Refer to Figure 18
4. Position the calibration trays under the feed rollers.
5. Ensure that the drill is not in a tramlining bout so that
all the feed rollers turn when the seed shaft is rotating.
6. Fill the hopper with enough seed to ensure that all the
feed rollers are covered throughout the test.
Refer to Figure 19
7. Remove the spring clip pin (a) and place the large
crank handle (b) over the drive assembly and rotate
clockwise (c) to “prime” the feed mechanism. It is im-
portant to turn the handle at least 50 turns before cal-
ibrating to ensure seed is flowing correctly through the
system. Empty the calibration trays before carrying
out a full test.
8. Rotate the crank handle clockwise (c) 41 turns. (For
extra accuracy it is recommended to carry out a Cali-
brations for Number of Turns, described on the next
page).
9. Weigh the seed collected from both trays in pounds.
Use an accurate set of scales. This amount is equiva-
lent to 1/10th acre.
Seeding Rate (lb/ac)=Weight Collected (lb) x 10
10. If the result is different to the required rate, adjust the
seed rate handle for the small seeds box to increase
or decrease the seeding rate. Remember to re-prime
the feed mechanism with at least 50 turns before re-
calibrating.
19924
a
b
Drive Assembly
a
b
c
20215
19768
Figure 18
Calibration Tray
Figure 19
Calibration Crank Handle
Figure 17
Venturi Unit