Great Plains NTA2007HD Operator Manual - Manual (Page 69)

Great Plains Manufacturing, Inc. Contents Index Adjustments 65
04/04/2011 Contents Index 166-283M
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 NTA607/2007HD drill is a volumetric implement. For
a given metering setup, rates vary for materials with dif-
ferent density and granularity. The charts provide a start-
ing point, but calibration is essential for accurate
application (even using both meters for the same mate-
rial at the same rate). Material rates are set indepen-
dently for each hopper/meter. The seed monitor reports,
and can optionally control, seed and dry fertilizer rates.
Liquid fertilizer rates are set at the pump. The seed mon-
itor does not report or control any aspect of liquid rates.
Check Contact Tire
Reliable material rates are only achieved if the ground
drive system is working properly. The transport tires and
contact drive tire must be the correct size, and must be
inflated to factory specifications. Check tire pressures,
particularly the contact tire pressure, whenever loading
seed or fertilizer. See page 147.
Always replace worn tires with the correct size.
Check Flute Shaft Configuration
For some unusual 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 58
(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 59 (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 163.
Null4:
Figure 58
Flute Stars and Filler
26440
1 2
Null4:
Figure 59
Checking Flute Shafts
26426
3 1 2
1
2
3