Setting material rates, Check contact tires, Check flute shaft configuration – Great Plains NTA3007HD Operator Manual User Manual
Page 76: Figure 78 flute stars and filler, Figure 79 checking flute shafts
72 NTA907HD or NTA3007HD
166-207M
04/04/2011
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 materi-
als 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 145.
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 141) that
can increase rates to 150% or 200% of factory standard.
Refer to Figure 78
(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 79 (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 neces-
sary to remove the shaft. Inspect the flutes
, and filler
rings
at active outlets.
On a standard “2 star” shaft, each seed drop outlet con-
tains 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 165.
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©
Manufacturing, Inc.
www.greatplainsmfg.com
Seed and Fertilizer Rate Charts
for:
AD4010HD Air Drills,
NTA607HD or NT
A2007HD Air Drills,
NTA907HD or NT
A3007HD Air Drills,
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 implement.
To assure the most
accurate application
rates it is recommended
that the air drill be calibr
ated for the
desired mater
ials at the time of planting.
Null4:
Figure 78
Flute Stars and Filler
26440
1
2
Null4:
Figure 79
Checking Flute Shafts
26426
3
1
2
1
2
3