Great Plains 1007NT Operator Manual - Manual (Page 34)

30 1007NT Great Plains Manufacturing, Inc.
150-290M 10/06/2010
Front Eyebolt Adjustment
Refer to Figure 18
6.
Raise drill and install lock channels. Loosen jam nut
.
7. Adjust stop nut to raise eyebolt. The depth change
per unit of eyebolt movement is 1.75in depth per inch
of eyebolt, or 4.4 cm depth per cm of eyebolt. This is
also about
3 ⁄
16
in (5mm) of depth change per turn of
the adjust nut.
8. Re-tighten jam nut when desired depth is achieved.
9. If the front eyebolt height requires more than about
1 ⁄
4
in (13mm) adjustment, make the same adjustment
change to both rear eyebolts, to keep the drill level
front-to-back.
Note: The total reveal on rear eyebolts may not match the
front, or each other, due to other leveling require-
ments. See “Leveling Drill” on page 44.
Coulter Down Pressure
The maximum down force at the coulters depends on:
• empty drill weight (page 20),
• extra weights added (page 32),
• down-force consumed by the opener discs (this can
range from 50-150 pounds), and;
• the current material loading (which declines to zero
during planting).
1007NT configurations typically are too light to reach the
factory down-force of 400 lbs at all rows. The tables at
right show typical forces available. Do not increase
coulter spring forces drill-wide unless weight is available.
Figure 18
Front Eyebolt Rate
28446
Depth Change:
3 ⁄
16
in per turn
(5mm per turn)
6
5
5
6
Available Coulter Force Per Row: 1007NT-1575
Available Coulter Force Per Row: 1007NT-1906