Great Plains 3N-4025P Operator Manual User Manual
Page 77
Great Plains Manufacturing, Inc.
Adjustments
73
2014-01-29
196-538M
Refer to Figure 90
Frame height
is measured from the bottom of the
opener tool bar (the largest of the tool bars), and is
measured with the drill lowered.
The recommended height depends on your field
conditions (see table below), and whether unit-mounted
coulters are installed.
For no-till conditions, a 26 in. (66 cm) height allows the
opener parallel arms to run parallel to the ground giving
the opener the maximum upward or downward flotation.
In loose or conventional planting conditions, a frame
height above 26 in. (66 cm) helps keep the no-till spring
forces from burying the openers.
Note: Setting the frame above the 26 in. (66 cm) limits
the opener downward flotation.
Note: Running with the frame below 26 in. (66 cm) limits
opener upward flotation and could cause opener
damage especially at center of the drill.
Crushing Hazard: Make all down-stop adjustments with
circuit in neutral and drill raised (actuator plunger not in
contact with down-stop). Loosening the down-stop with circuit
active and drill lowered results in rapid lowering of the frame.
Height Mis-setting Risk: Make sure the drill is level and the
lift system bled and re-phased before adjusting the tool bar
height. If the center section does not consistently stop at the set
height, or the wings do not run at the same height as the
center, the lift system may have air or be out of phase (above),
or the wings may not be level. See “Frame Alignment and
Level” on page 142.
Conditions
Unit
Opener
Tool Bar Height
Light no-till, or
conventional
tillage, with
unit-mounted
coulters or no
coulters
3N-4010HDP
3N-4010P
3N-4020P
3N-4025P
Above 26 in.
(66 cm)
Above 24 in.
(61 cm)
Above 24 in.
(61 cm)
Above 24 in. (61
cm)
Moderate to
challenging no-till
with unit-mounted
coulters
3N-4010HDF
3N-4010P
3N-4020P
3N-4025P
At 26 in. (66 cm)
At 24 in. (61 cm)
At 24 in. (61 cm)
At 24 in. (61 cm)
Figure 90
UMC/NC Frame Height
27214
1
1
1