GREAT PLAINS YP4425A, Operating Manual, Page: 129 / 170

YP4425A Table of Contents Index Options 125
2018-07-30 Table of Contents Index 401-805M
Low Speed Kit
Combinations of narrow row spacings, high cell count or
fingers per revolution, low populations and/or low field
speed can result in the hydraulic seed meter motor
operating at an rpm too low for consistent control by the
proportional valve.
If the remedies in the Troubleshooting chart (page 86)
are not available, order a low speed kit to replace the
standard motor output sprocket with one having fewer
teeth that increases motor speed by 160%.
See “ 402-520A Low Speed Kit Installation ” on
page 157.
Markers
Markers are a standard factory-installed feature on the
YP4425A Planter, but may be optionally deleted (line
item 401-799A), for example, if all planting is done via
GPS navigation.
If any possible future planting (or re-sale considerations)
might require markers, do not delete them from the initial
YP4425A Planter order.
For operations, see:
“
Fold Cylinder Bleeding ” on page 104,
“ Marker Unfolding ” on page 53,
“ Folding the Markers ” on page 54, and
“ Marker Adjustments ” on page 60.
Description Order Number
YP30,40,44,24 LOW SPEED DRIVE 402-520A
16
10
36355
29177