Great Plains YP4025F-1670 Operator Manual - Manual (Page 102)

98 YP4010HD/YP4025/F Table of Contents Index Great Plains Manufacturing, Inc.
401-571M Table of Contents Index 2014-09-08
Marker Shear Bolt Replacement
Refer to Figure 124
If a marker gets caught or hits an obstruction, it is
designed to fail a shear bolt at the fold, pivot on a pin,
and swing back.
The shear bolt is a hex head cap screw,
1 ⁄
2
-13
×
2
1 ⁄
2
in.
Grade 5, Great Plains part number 802-130C, plus a
1 ⁄
2
-13 lock nut, Great Plains part number 803-019C.
Install a replacement shear bolt on the vertical faces on
the side opposite from the pivot bolt. Do not use a higher
grade bolt, or marker hang-ups may result in machine
damage. Do not use a lower grade bolt, or you may
experience nuisance shears.
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 98 (which depicts 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 YP40 planter, and periodically thereafter, for
example, if soil conditions change dramatically.
Refer to Figure 125 (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 98 for adjustments.
Figure 124
Marker Shear Bolt
29292
Figure 125
Wing Level Check
29278