Great Plains 3S-4000HDF Operator Manual - Manual (Page 70)

66 3S-4000HD/HDF Table of Contents Index Great Plains Manufacturing, Inc.
195-067M Table of Contents Index 2013-06-13
Marker Adjustments
Overhead Crushing and Sharp Object Hazards:
Never allow anyone near the drill when folding or unfolding
the markers. You may be injured if hit by a folding or unfolding
marker. Marker disks may be sharp. Markers may fall quickly
and unexpectedly if the hydraulics fail.
There are four operating adjustments for markers:
• Marker Extension
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
planting speed.
• Chain Length
You may want to adjust the chain length to ensure the
markers track uneven ground, and do not drag
excessively 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 79
• “Marker Shear Bolt” on page 86
• “Marker Transport Carrier” on page 86
Marker Extension
Marker extension depends on drill size, row unit spacing
and row units in use.
See “Marker Setup” on page 24 for initial values for
marker extension.
Refer to Figure 75
To adjust marker width, loosen two U-bolt nuts and
slide arm tube in or out.
Figure 75
Marker Extension Adjustment
18878
1
2
1
2