Great Plains 1007NT Operator Manual - Manual (Page 32)

28 1007NT Great Plains Manufacturing, Inc.
150-290M 10/06/2010
Coulter Adjustments
Refer to Figure 15
A no-till coulter
, 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 group coulter depth by raising or lowering the
front rockshaft with the depth control valve (next
topic).
2. Set opener depth with T-handles on all press
wheels (page 37).
3. If soil conditions make it necessary, increase coulter
down pressure by adding weights (page 32).
4. As necessary, adjust individual coulters in tire tracks
for depth and down-force. See “Coulter Depth (Indi-
vidual Rows)” on page 32.
Coulters normally operate fully down against their stops,
with the coulter springs compressing only occasionally
as the blades encounter obstructions.
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.
Figure 15
Coulter
28458
1
2
1
2