Great Plains NTA3010 Operator Manual - Manual (Page 44)

40 NTA3010 and NTA3510 Table of Contents Index Great Plains Manufacturing, Inc.
160-219M-A Table of Contents Index 2014-03-26
Individual Coulter Height
Individual coulters that run in tire tracks can be lowered if
desired. To raise or lower individual coulters:
1. Loosen all six the mounting clamp nuts , and
adjust the coulter spring bar to the desired height.
2. Snug the hex-head clamp bolts just until the
U-bolts are tight on each side of the spring bar.
3. Check alignment of coulter blade with row unit
opener blade centerline.
4. Tighten nuts on U-bolts.
5. Finish tightening hex-head clamp bolts .
Note: Ground clearance on lowered coulters will be
reduced when the drill is raised.
Coulter Spring Force
Coulter springs are preset at 10 inches (26 cm), giving
the coulters an initial operating force of 400 pounds. This
setting is adequate for many difficult no-till conditions.
For lighter no-till conditions where rocks or other
obstructions are a problem, you can lengthen the springs
to protect the coulters from impact.
Note: Setting the coulter spring length shorter than
9.75 inches may contribute to premature failure of
parts and voids the warranty. If additional force is
needed, add weights to the implement.
Spring Length Force
10.25 inches (26.04 cm) 300 lbs (136 kg)
10 inches (25.4 cm) 400 lbs (181 kg)
9.75 inches (24.77 cm) 525 lbs (238 kg)
Figure 43
Coulter Mounting Height
10300
1 2
3
1 2
3
1
2
1
Figure 44
Coulter Spring Force
26422