Great Plains 1006NT Operator Manual - Manual (Page 25)

1/3/07 150-285M
23 Adjustments
Adjustments
Coulter Adjustments
Refer to Figure 11
A no-till coulter (1) is mounted directly ahead of
each opener on the drill. The coulters cut through
heavy trash and make a groove in the soil for the
openers. The coulters are mounted on the drill
frame so coulter cutting depth changes as the drill
is raised and lowered.
To set drill seeding depth, you must:
1. Set coulter depth with hydraulic stop.
2. Set opener depth with T-handles on press
wheels.
3. If soil conditions make it necessary, increase
coulter down pressure by adding weights.
If necessary, adjust individual coulters or openers
to seed in tire tracks, refer to page 24.
Coulter cutting depth is controlled by a depth con-
trol valve.
The amount of coulter down force needed to cut a
soil groove varies with soil conditions. Adding
weight or shortening the coulter spring increases
coulter down pressure and cutting force.
Coulter Depth Control
The master-slave lift cylinders on your drill control
the depth of the coulters. A depth valve regulates
the retracted length of these cylinders.
Refer to Figure 12
1. Slightly raise drill with depth stop engage-
ment arm on the rock shaft not touching the
valve.
2. Turn the depth control knob clockwise. Each
rotation lowers the coulters approximately 1/4
inch.
3. Raise and lower drill a few times to recheck
depth.
NOTE: Changing depth of coulters will effect
planting depth of openers. Press wheels will need
to be adjusted accordingly.
Figure 11
Coulter
13985
Figure 12
Coulter Depth Stop
21708