Great Plains V-300F Operator Manual - Manual (Page 28)

24 V300 & V300F Great Plains Manufacturing, Inc.
148-057M-A 11/15/2007
Hydraulic Hitch Adjustment
The hydraulic hitch is the primary means of adjusting
coulter depth.
Making changes to hitch height also affects hitch level,
requiring spacer changes at the lift cylinders. If the hitch
was already level, make about half the needed coulter
depth change via hitch height. The compensating level
adjustment with lift cylinder spacers makes the rest of
the coulter depth change.
After adjusting the hitch height and spacers, check the
new setting for depth.
Once the depth and level are satisfactory, record the
reading on the stroke scale.
Lift Spacer Adjustments
Refer to Figure 21
The height of the rear end of the hitch is determined by
the implement lift cylinders. The drill includes two sets of
five (ten total) spacers (cylinder stop bushings) that are
used to raise the “down” position of the lift cylinders.
These spacers are provided in five different sizes, and
are used in identical combinations on both sides of the
drill. They are stored on rod loops on the hitch wings
(see Figure 18 on page 23).
The combinations provide a range of spacer stack sizes
from 19 to 166mm (0.75-6.5in), in 6.35mm (0.25in) incre-
ments.
The 6.35mm change increment corresponds to a change
in coulter depth of about 3.3mm when the hitch is level.
However, if the spacers are changed, the hitch needs to
be adjusted to compensate for the depth change, and it
amplifies the change caused by the spacers.
When raising or lowering the coulter depth with the hitch
already level, add or remove spacers equal to the coulter
depth change desired. The spacers provide about half
the desired depth change, The re-leveling at the hitch
cylinder provides the other half.
Re-check depth after spacer and hitch level changes.
Figure 20
Setting Hitch Height
27234
Figure 21
Cylinder Stop Bushing (Spacer)
22622