Great Plains NTA3010 Operator Manual - Manual (Page 24)

22
Section 3 Adjustments
NTA3010 and NTA3510 Air Drill Implement SN Z1370- 160-219M 8/14/
Great Plains Mfg., Inc.
Wing Down Pressure Adjustment
The implement is equipped with weight-transfer hydraulics
to evenly distribute weight between the frame sections.
While seeding, hydraulic down pressure is placed on the
wings so all frame sections run at the same depth. If there
is not enough weight on the wings, they will run higher
than the center section.
To adjust wing down pressure,
1. Check that in-cab rocker switch is on and selector
valve is turned to field position. Refer to Figure 2-9,
page 17.
2. Lower implement so openers are on ground.
3. Engage fan hydraulics.
4. Turn pressure-control valve shown in Figure 3-4.
When facing valve,
•
increase weight on wing sections by turning clock-
wise.
•
decrease weight on wings by turning counterclock-
wise.
Typical pressures on gauge shown in Figure 3-4
should be 200 to 600 psi.
Figure 3-4
Pressure-Control Valve and Gauge
5. When satisfied with pressure reading, raise imple-
ment while watching pressure gauge. Gauge reading
should drop as you raise implement.
NOTE: If wings run lower than center section when at min-
imum pressure setting, add weight to center section. Refer
to Weights, page 21.
IMPORTANT: Do not exceed 800 psi. Exceeding 800
psi could cause equipment damage.
17229
Opener Adjustment
Seed cannot be placed any deeper than coulter cutting
depth. Before adjusting openers, check that coulters are
running deep enough and that the frame is level from front
to rear. Refer to Coulter Adjustments, page 20, and Level
Frame Front to Rear, “Preparation and Setup,” page 13.
Adjust the parallel-linkage openers with the tool stored on
the rear tube of the center frame section.
To increase or decrease opener down-force, position the
tool in the holes on the left and right mounting plates
shown in Figure 3-5 and pull down on the adjuster. This
will reposition the springs and change opener down force.
Figure 3-5
Parallel-Linkage Opener Springs
Minimum and maximum down-force settings are indicated
by the position of spring adjuster as shown in Figure 3-6.
Figure 3-6
Parallel-Linkage Spring Adjustments
16128
Spr
ing Mounting Plate
Minimum Force
12104
Maximum Force