GREAT PLAINS NTA3007HD, Operator'S Manual

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NTA907HD and NTA3007HD Table of Contents Index Adjustments
Great Plains | 166-207M | 02/26/2019 Table of Contents Index 71
Setting Material Rates
Rate setting details are covered in the Seed Rate manual
167-085B, which also contains seed and fertilizer rate
charts. The topic is covered only in summary form in the
present manual.
The NTA907/3007HD drill is a volumetric implement. For
a given metering configuration, rates will vary for
materials with different density and granularity. The rate
charts provide starting point, but calibration is essential
for accurate application (even if using both meters for the
same material at the same rate). Material rates are set
independently for each hopper and meter.
Check Contact Tires
Reliable material rates are only achieved if the ground
drive system is working properly. The transport tires and
contact drive tires must be the correct size, and must be
inflated to factory specifications. Check tire pressures,
particularly the contact tire pressures, whenever loading
seed or fertilizer. See page 144.
Always replace worn tires with the correct size.
Check Flute Shaft Configuration
For some unusual very high rate applications, Great
Plains offers optional meter flute shafts (page 140) that
can increase rates to 150% or 200% of factory standard.
Refer to Figure 76
(which depicts a single flute “star” with its halves, a single
star mated, two stars staggered, and a filler)
Know your “stars” setup. If your drill has never been
changed from factory standard, you have meter flute
shafts with 2 “stars” (4 halves) per outlet. How many
“stars” you have determines which rate chart to use.
Refer to Figure 77 (depicting an inspection from below
meter)
If the configuration is not known, inspect the flute shaft
from the hopper lid (if hopper empty), or from below the
meter, with the calibration door fully open. It is not
necessary to remove the shaft. Inspect the flutes , and
filler rings
at active outlets.
On a standard “2 star” shaft, each seed drop outlet
contains two flute sets (4 halves), each pair staggered
slightly from the next. Unused outlets are fully blocked by
filler rings
.
On a “3 star” shaft, each outlet contains 3 flute sets.
On a “4 star” shaft, each outlet contains 4 flute sets, with
no fillers between adjacent drops.
To change meter flutes, see “ Changing Meter Flutes ” on
page 164.
EN
© Copyright 2012
Printed 2012-01-03
167-085B
Manufacturing, Inc.
www.greatplainsmfg.com
ORIGINAL INSTR
UCTIONS
Seed and Fertilizer Rate Charts for Air
Drills with Variable
Rate Gearbox (VRG)
Metering, models:
NTA607 or NT
A607HD,
NTA907 or NT
A907HD,
NTA2007 or NT
A2007HD,
NTA3007 or NT
A3007HD, and
ADC2350 or ADC2350B Air Drill Carts
with all compatible air drill implements
The following pages
are to assist in the proper setting of seeding and
fertilizer rates for the air dr
ill.
To assure the most
accurate application
rates it is recommended
that the air drill be calibr
ated for the
desired materials at the time of planting.
Figure 76
Flute Stars and Filler
26440
1
2
Figure 77
Checking Flute Shafts
26426
3 1
2
1
2
3