Great Plains 2525A Operator Manual - Manual (Page 38)

34 2025A/2525A Table of Contents Index Great Plains Manufacturing, Inc.
118-999M Table of Contents Index 2013-06-04
Marker Adjustments
There are three adjustments and three setup/mainte-
nance items for markers:
• Disk Angle (following)
Even if your row spacing rarely changes, you may
need to adjust disk angle for soil conditions and plant-
ing speed.
• Shear Bolt Replacement (page 75)
If a marker hangs up on an obstruction, a bolt at the
fold is designed to fail.
• Marker Cylinder Bleed (page 76)
Once set for a specific row spacing, this only needs
periodic checking to ensure the clamp is secure.
• Marker Chain Length (page 99)
• Marker Extension (page 100)
Once set for a specific row spacing, this only needs
periodic checking to ensure the clamp is secure.
• Marker Speed (page 98)
Once initially set by your dealer, this rarely needs
modification.
Marker Disk Adjustment
Sharp Object Hazard:
Use caution when making adjustments in this area. Marker
disks may be sharp.
Refer to Figure 20
1. To change angle of cut, and the width of the mark,
loosen
1 ⁄
2
-inch bolts holding the disk assembly.
For a wider mark , increase the angle of the
marker with respect to the tube . For a narrower
mark , reduce the angle.
Note: Do not set a marker angle wider than need to
make a useful mark. Excess angle increases wear
on all marker components.
2. Tighten bolts .
Note: The direction of travel tends to drive the disk
angle to Wide. If bolts are not tight enough, or
loosen over time, the disk will slip into the Wide
mark configuration.
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.
Figure 20
Marker Disk Angle
11757
T
2
1
N
W T
2
W
1
N
2
T