Great Plains 3P605NT Material Rate - Manual (Page 5)

Great Plains Mfg., Inc.
3
05/18/2007 151-061B
Checking Main Seed Box Rate
1. To adjust seeding rate, decide which drive type
(gearbox) setting you need from the seeding
charts beginning on page 4. Set the gearbox.
2. Record weight of an empty container large enough
to hold seed metered for one acre.
3. Place several pounds of seed over three seed
cups on an outside end of drill box. Pull seed
tubes off of these three openers.
Note: For drills built after October 1, 2005, calibrate us-
ing gauge wheel or supplied calibration crank.
For drills built before October 1, 2005, calibrate
using gauge wheel or order the calibration crank
kit available through your Great Plains Dealer.
4. To calibrate, raise gauge wheel off the ground or
use the supplied calibration crank handle.
5. Rotate gauge wheel or calibration crank a few
turns to confirm gearbox has engaged.
6. Rotate gauge wheel or calibration crank to see
that feed cups and drive are working properly and
are free from foreign matter.
7. Turn gauge wheel or calibration crank several
times to fill seed cups with seed. Turn wheel until
seed falls to the ground from each cup.
8. Rotate gauge wheel or calibration crank until one
acre has been tallied (see the table at right).
9. Check that the three seed cups have plenty of
seed coming into them.
10. Weigh metered seed. Subtract initial weight of
container. Divide by three. Multiply by the number
of openers on your drill to determine total pounds
seeded per acre. If this figure is different than
desired, set your seed rate adjustment handle
accordingly.
11. When drilling, check seeding rate by noting acres
drilled, amount of seed added to drill and seed
level in drill box. If you are seeding more or less
than desired, adjust seeding rate slightly to com-
pensate for field conditions.
!
CAUTION
For the 605NT, be sure to insert transport cylinder locks to
prevent injury should hydraulic system allow drill to lower
while working around it.
Figure 4
3P605NT Calibration Crank
23392
Figure 5
605NT Calibration Crank
23389
Note: On the 605NT you can also rotate the gauge
wheel jackshaft or the gear box jackshaft by
means of a wrench or socket. If rotating gauge
wheel jackshaft, disengage the lockout on the
drive wheel. When turning the gauge wheel jack-
shaft or gear box jackshaft use same number of
rotations as for rotating the drive wheel.
Note: On the 3P605NT you can also rotate the gearbox
drive shaft by means of a wrench or socket.
Note: You may want to repeat the calibration procedure
if your results vary greatly from seed rate chart.
Rotations for One Acre
Drill Model Crank Gauge Wheel
605NT 935 935
3P605NT 913 1628
MeasuredSeed EmptyContainer –
3
---------------------------------------------------------------------------------- PoundsPerSeedCup =
PoundsPerSeedCup NumberOfOpeners × PoundsPerAcre =