Great Plains V-300F Operator Manual - Manual (Page 27)

Great Plains Manufacturing, Inc. Setup 23
11/15/2007 148-057M-A
Initial Hitch Height
Lowering for Leveling
Remove all transport locks (see page 31), and fully lower
drill using the lift cylinders.
Initial Hitch Height
if you have a record of the hitch height scale reading
from a recent planting session, set the height to that
value.
Otherwise, adjust the hitch until the coulter blades just
touch the ground, then lower it one half count on the
hitch stroke gauge (roughly 5cm or 2in of vertical travel
at the coulter blades).
Lower Drill, Pull Forward and Check
It is not possible to accurately set depth and force by
raising and lowering a stationary drill. It must be run in
the ground, in soil conditions as similar as possible to
those of the field to be planted.
Review lift and lower operations on page 35.
Pull forward at least the length of the tractor-plus-drill, so
that you can see the effects of all tires, the coulters,
openers and presswheels.
Refer to Figure 19
• Check that the hitch
is level. The primary adjust-
ment for this is lift cylinder spacers (once coulters are
at desired depth).
• Check that the coulters are running at the desired
depth , typically 13 to 25mm (0.5 to 1in) deeper than
the opener disks . The primary adjustment for this is
the hydraulic hitch.
• Check that the openers are running at the desired
seeding depth . The primary adjustments for this are
the row unit T-handle and the hydraulic down force.
• Check that the opener frames are level, as this pro-
vides the most consistent depth control and predict-
able down-force. Once all the other adjustments are
correctly tuned, the row units operate parallel to flat
ground.
Figure 18
Hitch Height Scale
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1
3 2
Figure 19
Checking Level, Depths
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4
1
2
3
3
4