Frame height without frame-mounted coulters – Great Plains 3N4010HDA Operator Manual User Manual
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3N-4010HDA
Great Plains Manufacturing, Inc.
196-444M
2013-09-24
Frame Height without
Frame-Mounted Coulters
Use these instructions with a drill having no coulters, or
having unit-mounted coulters. Adjustments to individual
unit-mounted coulters themselves are on page 42.
If the drill has frame-mounted coulters, use the height
procedure on page 34.
Refer to Figure 34
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 26in (66cm) 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 26in (66cm) helps keep the no-till spring
forces from burying the openers.
Note: Setting the frame above the 26in (66cm) limits the
opener downward flotation.
Note: Running with the frame below 26in (66cm) limits
opener upward flotation and could cause opener
damage especially at center of the drill.
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.
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 “Leveling Drill” on page 56.
Conditions
Opener
Tool Bar Height
Light no-till, or conventional till-
age, with unit-mounted coulters
or no coulters
Above 26in
(above 66cm)
Moderate to challenging no-till
with unit-mounted coulters
At 26in
(66cm)
27213
Figure 34
UMC/NC Frame Height
27214
1
1
1