GREAT PLAINS YP4425A, Operating Manual, Page: 158 / 170

2018-07-30 Table of Contents Index 401-805M
YP4425A Table of Contents Index Appendix B - Initial and Option Setup 154
Dual Marker Speed Adjustment
Overhead Sharp Object Hazard:
You may be injured if hit by a folding or unfolding marker.
Markers may fall quickly and unexpectedly if the hydraulics
fail. Never allow anyone near the planter when folding or
unfolding the markers.
Refer to Figure 145 and Figure 146
Adjust folding speed for dual markers with hex
adjustment screws on the sequence valve body. The
valve sequence body is located on top of the left wing
frame.
Loosen jam nuts before making adjustments.
There is one adjustment screw for unfolding speed
and one for folding speed
. You can identify adjustment
screws by markings stamped in valve body.
Turn adjustment screws clockwise ( : slower) to
decrease [un]folding speed and counterclockwise
(
: faster) to increase [un]folding speed.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed. Excessive [un]folding
speed could damage markers and void the warranty.
After adjusting the folding speed, tighten jam nuts on hex
adjustment screws to hold settings.
Marker Extension
Prior to first use, set and check where the mark is made
on each side relative to the outside row units (whether in
use or not).
1. Move the planter to a location where both markers
may be safely unfolded. Unfold the planter. Lower
the planter. Unfold one marker.
2. Find the suggested initial marker Extension in the
table below.
Refer to Figure 147 and Figure 140
3. Measure out the Extension distance from the
center-line of each outside end row unit. Do not
measure to center of row pair.
Figure 145
Marker Sequence Valve Location
29302
1
2
F
S
S
Figure 146
Marker Speed Adjustment
14048
1
2
S
F
Figure 147
Marker Extension
29301
E
E
YP4425A-2422
Left Exten s ion 275 inche s (699 cm)
Ri g ht Exten s ion 275 inche s (699 cm)
E