Great Plains NP4000B Operator Manual - Manual (Page 91)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 87
2014-05-14 Table of Contents Index 417-199M
NH
3
Sealer Adjustments
The standard NP4000A/B spider sealers have three
adjustments. You may need to alter these from factory
settings, based on soil conditions, crop residue and
application speed.
Refer to Figure 57
1.
Down-pressure: T-handles set the arm spring
tension. The adjustment plates have 3 settings.
2. Spacing: The arm weldments have 8 bolt holes
allowing 2 setback positions and 2 spacing positions.
3. Angle: The sealer mount plates have 4 holes:
2 in-line , and 2 extra holes , slightly offset,
providing an angle adjustment.
These adjustments are most easily made with the
applicator raised. The down-pressure adjustment may be
made with rows in the ground, with some extra effort.
Chemical Hazard:
Adjust sealers with rows dry. Make adjustments before
charging the metering system with anhydrous ammonia, or
after thoroughly discharging the system. With the tines out of
the ground, there could otherwise be releases of ammonia at
dangerous concentrations.
Sealer Down-Pressure Adjustment
The following trip down-pressures are available. These
values are per sealer arm, and are with the coulters in
the ground, and arms slightly raised per nominal factory
assumptions (as depicted in Figure 55 on page 86).
Note: With the applicator raised, position has minimal
spring tension.
Sealer Spacing or Setback Adjustment
For in-line (parallel) sealer wheel running, use the center
holes
in the mount plates . In-line orientation is
recommended for high-residue fields.
Sealer Angle Adjustment
10
° of leading toe-out (20° total) is available by using the
inner center hole of the mount plate and the leading
offset hole
. No setback adjustment is available when
using toe-out. Toe-out is not recommended for
high-residue fields.
Handle Slot Down-Pressure
Rear/Lowest 12 pounds 5.4 kg
Mid/Medium 17 pounds 7.7 kg
Forward/Max. 28 pounds 12.7 kg
4
1
2
3
c
b
a
3
6
5
Figure 57
Sealer Adjustments
34931
1
4
2
3
5 6
a
a
b
c
5 3
6