Great Plains NTA2007HD Operator Manual - Manual (Page 91)

Great Plains Manufacturing, Inc. Contents Index Adjustments 87
04/04/2011 Contents Index 166-283M
Frame-Mounted Coulters
Frame-mounted coulters are used “in row” and not
“zone”. They are intended to prepare the soil directly
ahead of the seed furrow.
The factory suggested default setting, with new coulter
blades, at:
3.8cm (1
1 ⁄
2
in) opener (planting) depth ,
is a coulter depth of:
5.1cm (2in), or
13mm (
1 ⁄
2
in) below opener depth.
Frame-Mounted Coulter Adjustments
There are several frame-mounted coulter adjustments:
Refer to Figure 71
1.
Frame (tool bar) height:
Frame height directly controls group coulter
depth
.
If the center frame is not running at the correct
height, coulter depth is also incorrect. See “Adjust-
ing Tool Bar Height” on page 81.
Wing frame height is controlled by center frame
height, and is affected by wing weight transfer. See
“Wing Weight Transfer Adjustment” on page 86.
Refer to Figure 72
2.
Individual row unit height:
A few individual rows may be lowered by loosening
nuts
at tool bar U-bolts, sliding the spring bar
down and re-tightening. Do not lower more than
about 1in (2.5cm) Keep the top edge of the spring
bar at or above the top of the upper bolt holes.
3. Individual coulter down-force (page 88):
This is a spring adjustment for rows in tracks, or all
rows - in unusually light or heavy no-till conditions.
4. Coulter-to-row alignment:
Coulters are factory aligned so that the coulter disk
prepares the furrow directly ahead of the opener
disks.
After any coulter or row maintenance, check that
these components are still aligned. Adjust at the
coulter mounting clamp at the tool bar. Re-check
coulter height if any adjustments are made.
In regular or heavy no-till conditions, adjust opener depth
to set:
the coulter depth to about 13mm (
1 ⁄
2
in) deeper than
seeding depth.
In addition to checking depths at setup, be sure to check
actual seeding results while planting.
Replace the 43.2cm (17in) coulter blades when their
diameter is worn to less than 40cm (15
3 ⁄
4
in).
Null4:
Figure 71
07HD Coulter and Row Unit
31196
4 5
5
4
4
Null4:
Figure 72
Adjusting Row Unit height
29353
6
7
6 7
4
5