Great Plains 2525P Operator Manual - Manual (Page 30)

26 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.
118-231M 2013-05-10
Marker Disk Adjustment
Sharp Object Hazard:
Marker disks may be sharp. Use caution when making adjust-
ments in this area.
Refer to Figure 18
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.
Tighten bolts .
Note: The direction of travel tends to drive the disk an-
gle to Wide. If bolts are not tight enough, or loosen
over time, the disk will slip into the Wide mark con-
figuration.
Marker Chain Adjustment
There are two, interrelated adjustments for the marker
chain. Make these adjustments in the following order.
Refer to Figure 19
Marker Lifting Slack
1.
Unfold marker.
2. Loosen jam nuts on both sides of channel at
adjuster bolt .
3. Thread bolt in (up) until head is flush with inside jam
nut and both are flush with inside of channel.
4. Slowly fold marker while observing disk. If marker
disk drags across ground more than 12in (30cm)
before lifting, the chain is too long.
5. Shorten chain one or two links by moving clevis bolt
up chain a few links. Check adjustment by repeat-
ing folding process.
6. If chain is too short when marker is unfolded, it will
prevent end of marker from dropping into field
depressions, causing skips in your marker line. Cor-
rect this condition by lengthening chain one or two
links at clevis
.
Folding Slack
1.
Fold marker.
2. Extend adjustment bolt to take slack out of chain
while marker is folded. Extend bolt until there is no
chain slack.
3. Lock bolt in this position by tightening jam nuts on
either side of upright channel.
Figure 18
Marker Disk Angle
11757
T
2
1
N
W T
2
W
1 N
2
T
Figure 19
Marker Chain
15669
1
2
3
1
2
2
2
2
1