Great Plains YP2425A Operator Manual - Manual (Page 59)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 55
2014-02-10 Table of Contents Index 401-626M
Marker Gauge Wheel Adjustment
Refer to Figure 65
The purpose of the marker support wheel
is to carry
the weight of the inner section of the marker arm.
If the wheel is not touching the ground, or is often off the
ground during marker operations, remove the bolts
and move the wheel to a lower hole.
If the marker disc is frequently off the ground, the
support wheel mount may need to be moved to a higher
set of holes.
Marker Chain Length Adjustment
Great Plains suggests checking marker chain slack
every few years. If any maintenance or repairs cause the
chain to be disconnected, correct slack needs to be set
on reinstallation.
Perform any checks and adjustments with the marker
folded and tilted down into its cradle.
Refer to Figure 66
Lift the free end of the lift arm weldment
until
horizontal. Re-attach chain so that it is taut.
Ideally, the unfolding marker reaches the ground 2-3 feet
(60-90 cm) before the marker is completely unfolded.
Equipment Damage/Marker Failure Risks:
Set correct chain length. A chain length too long can result in
excess loads on the marker and nuisance shears, due to
striking the ground too early during unfolding. An
under-length chain can also prevent the marker from fully
resting in the cradle when folded. A chain too short can result
in unsatisfactory marker operations, including loss of ground
contact on uneven terrain.
Figure 65
Marker Gauge Wheel
29516
2
1
2
1
2
Figure 66
Marker Chain Slack
26057
5
5