Great Plains 3S-3000HDF Operator Manual v2 - Manual (Page 63)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 59
2014-02-11 Table of Contents Index 195-068M
Marker Adjustments
Pinch, Crush and Sharp Object Hazards:
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 drill when folding or unfold-
ing the markers.
There are four operating adjustments for markers:
• Marker Width
Once set for a specific row spacing, this only needs
periodic checking to ensure the clamp is secure.
• Disk Angle
Even if your row spacing rarely changes, you may
need to adjust disk angle for soil conditions and plant-
ing speed.
• Chain Length
You may want to adjust the chain length to ensure the
markers track uneven ground, and do not drag exces-
sively when markers are folded.
• Marker Speed
Once initially set by your dealer, this rarely needs
modification.
There are also three maintenance items for markers:
• “Bleeding Marker Hydraulics” on page 73
• “Marker Shear Bolt” on page 80
• “Marker Disk” on page 81
Marker Width
Marker extension depends on drill size, row unit spacing
and row units in use.
See “Marker Setup” on page 106 for initial values for
marker extension.
Refer to Figure 61
To adjust marker width, loosen two jam nuts and then
their bolts
and slide arm tube in or out. Re-tighten
bolts, then the jam nuts.
FigureSpacer
Figure 61
Marker Extension Adjustment
26497
1
2
1 2