Coulter height and castering – Great Plains NP4000 40-foot Operator Manual User Manual
Page 58
54
NP4000
Great Plains Manufacturing, Inc.
407-776M
2012-03-28
Coulter Height and Castering
Coulter height is the main control for application height.
Coulters may need to be lowered for rows in tracks.
Coulters implement-wide need adjustment as blades
wear.
If desired coulter depth cannot be achieved due to
challenging soil conditions, consider installing the
optional weight kit (page 100 and page 122).
Coulters may also be set for rigid row alignment, or
limited castering.
Refer to Figure 33 and Figure 34
1.
The factory setting for coulter height
is a distance
of 7.5 in (19.1 cm) from frame bottom to top of
coulter mount casting.
At a tool bar height
of 25 in (63.5 cm) above
ground, this is a blade depth
of 4 in (10.2 cm).
2.
For fields where frequent sharp turns are
unavoidable, you can reduce coulter plowing by
allowing the coulters to caster at the pivot casting.
Loosen the jam nuts at
. Loosen the set screws
just enough to allow the casting to swivel. Re-tighten
the jam nuts. Do not remove the center stop screw.
3.
As blades wear, keep the release height
constant
by raising the applicator weldment on the coulter
arm. Loosen the bolts
. Slide the weldment up.
Tighten the bolts.
If the application height is still too low after this
adjustment, the coulter blades may be worn and in
need of replacement.
Refer to the Vantage I manual (204-376M) for further
coulter adjustments.
eps
75%
Figure 33
Vantage I Coulter, Left
31655
6
2
5
1
3
1
2
3
4
5
6
eps
100%
Figure 34
Vantage I Coulter, Right
31597
4
4