Great Plains NTA3007 Operator Manual - Manual (Page 112)

108 NTA907 or NTA3007 Table of Contents Index Great Plains Manufacturing, Inc.
166-371M Table of Contents Index 2012-07-02
Frame-Mounted Coulters (Option)
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 setting, with fresh coulter blades, is a coulter
depth of 6.4 cm (2
1 ⁄
2
inch). There are several
adjustments for frame-mounted coulters:
Refer to Figure 107 (depicting similar 07HD row unit)
1.
Frame height:
If running the openers at less than full extension of
the lift cylinders, coulter depth
is directly affected
by opener height.
Normally, the opener T-handle is adjusted to set
opener depth
, and the coulter is left at the fixed
difference between coulter and opener depth.
2. Individual coulter down-force:
This is a spring adjustment for rows in tracks, or all
rows - in unusually light or heavy no-till conditions.
See page 109.
3. Coulter-to-row alignment:
Coulters are factory aligned so that the coulter disc
prepares the furrow directly ahead of the opener
discs.
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 13 mm (
1
⁄
2
inch) deeper
than
seeding depth.
In addition to checking depths at setup, be sure to check
actual seeding results while planting.
Replace coulter blades when their diameter is worn to less than 40 cm (15
3 ⁄
4
inch).
Refer to Figure 108
4.
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 2.5 cm (1 inch) Keep the top edge of the
spring bar at or above the top of the upper bolt holes.
5. Individual coulter down-force (page 109):
This is a spring adjustment for rows in tracks, or all
rows - in unusually light or heavy no-till conditions.
Figure 107
Coulter and Row Unit
29419
4 5
4
5
Figure 108
Adjusting Row Unit height
29353
6
7
4
5
6 7