GREAT PLAINS YP4425A, Operating Manual, Page: 110 / 170

2018-07-30 Table of Contents Index 401-805M
YP4425A Table of Contents Index Maintenance and Lubrication 106
Wing Leveling
Center Section Level Check
Vertical height and side-to-side level of the center section
cannot be adjusted, but needs to be verified before
checking/adjusting the wings. Soil accumulation on the
wheels, for example, can cause the center section to tilt.
Refer to Figure 13 on page 106 (which depicts a
twin-row YP40 planter on a paved surface - actual
measurement must be with rows pulled forward in
soil)
1. Measure the elevation of both left and right sides of
the planter center section, at the ends of the center
section tool bar.
Wing Leveling
Wing leveling check/adjustment is required prior to first
use of the YP4425A planter, and periodically thereafter,
for example, if soil conditions change dramatically.
Refer to Figure 128 (which depicts planter on a paved
surface - actual measurement must be with rows
pulled forward in soil)
2. Measure the outside ends of each wing section. This
should be the same as measured at step 1 above.
See page 106 for adjustments.
Wing Leveling, Inboard End
Wing leveling check/adjustment is required prior to first
use of the YP4425A Planter, and periodically thereafter,
for example, if soil conditions change dramatically.
Before performing this operation:
•
Lower unfolded planter in soil. Pull forward until
gauge and caster wheels are in normal planting
position.
•
Row unit coulter/planting depths, and row unit
down-pressures must all be equal.
•
Check center section height and level (page 20).
Refer to Figure 129
1. Measure the height of the inboard end of each wing,
directly under the wing flex pivot.
2. Compare this height to that of the center section
obtained at step 1 on page 106.
3. If the heights differ by more than 1 inch (2.5 cm),
check them again after leveling the wing ends. If they
still differ, the thrust washers in the wing pivots may
be worn and in need of replacement.

Any unevenness in ground that tilts the wings or
center section causes the inner wing ends to move up
or down slightly with respect to the center frame.
Figure 128
Wing Level Check
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Figure 129
Wing Level Check, Inboard
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