Great Plains V-300F Operator Manual - Manual (Page 76)

72 V300 & V300F Great Plains Manufacturing, Inc.
148-057M-A 11/15/2007
Coulter Adjustments
Because coulters prepare the soil ahead of the seed fur-
row, coulters need to be adjusted prior to making opener
and seeding depth adjustments. Coulters are generally
set to run 25mm (1in) lower than opener disks.
In normal operation, the coulter arms are resting on their
stops. They rise against their springs only when riding up
over obstructions. If you observe multiple coulters rising
against their springs for extended periods, and the depth
is correct, the springs may need adjusting.
Coulter Factory Settings
Refer to Figure 72
Gang Coulter Depth
The depth at which the entire coulter gang runs is con-
trolled by the height of the hitch at the front and back. In
general, both ends of the hitch must be adjusted to
change coulter depth, as changes to either end also
change hitch level. Make about half the change at each
end.
See “Initial Hitch Height” on page 23, “Initial Lift Cylin-
der Spacers” on page 21, “Hydraulic Hitch Adjust-
ment” on page 24 and “Lift Spacer Adjustments” on
page 24.
Individual Coulter Depth
Adjust coulter height to compensate for lower soil surface
height in some rows, such as in tire tracks. When a sur-
face height difference exists, adjust coulter height before
adjusting coulter force.
Adjust coulter down-force to compensate for firmer soil in
some rows.
Coulter Height
You can change the depth of individual coulters by
adjusting coulter-mounting height. Do not make this
adjustment to all coulters.
If you adjust coulter height, be sure to re-bolt coulters
vertically straight and correctly spaced. Check coulter
alignment by lowering drill and pulling straight for about
5m (16ft). Inspect furrows to ensure that coulter furrows
align with opener furrows.
Height 28.26cm (11.13in) from bottom of tool bar to
bottom of pivot casting
Force 25.4cm (10.0in) spring length - see table in
this section for forces
Depth 5.1cm (2in) below surface if openers are
running at 2.5cm (1in)
Figure 72
Coulter Factory Settings
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