Great Plains 3S-3000F Operator Manual v2 - Manual (Page 48)

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Section 3 Adjustments
3S-3000 Three-Section Folding Drill 195-110M-A 11/9/07
Great Plains Mfg., Inc.
Marker Chain
There are two basic adjustments needed on the marker
chain, especially in new installation. These adjustments
are interrelated and should be done in the following order:
Refer to Figure 3-23 when making the adjustments.
1. Lifting Slack. Start with the marker in the unfolded posi-
tion. Back the full threaded adjustment bolt (#1) down
until the head extends as little as possible. Slowly fold
the marker, observing the motion of the disk. If the
marker disk slides across the ground more than about
a foot before the chain and linkage lifts it up, the chain is
too long. Shorten the chain by moving the clevis (#2)
one or two links inboard from the end of the chain.
Check the adjustment by repeating the folding process.
If the chain is too short when the marker is unfolded, it
will prevent the end of the marker from dropping down
to follow a depression in the field. Correct this condition
by moving the utility clevis (#2) one or two links toward
the end of the chain to make it longer.
2. Folding Slack. After the adjustments in step one have
been completed, fold the marker. The full threaded ad-
justment bolt (#1) is provided to take the slack out of the
chain while the marker is in the folded position. Fold the
marker and extend this bolt until the slack is out of the
chain. Lock the bolt in this position by tightening the
nuts (#3) on either side of upright channel (#4).
Marker Chain Adjustment
Figure 3-23
15669
Shear Bolt
Disk Adjustment
The aggressiveness and mark left by the marker disk may
be changed by two methods:
Refer to Figure 3-24:
1. Disk Angle. To change the angle of cut loosen the two
1/2" bolts holding the disk assembly, and rotate the
disk assembly as desired.
2. Direction of Cut. The disk may be mounted to throw
dirt either in or out which will give different marks in dif-
ferent soil conditions. To change the direction of cut:
a. Reverse the blade and depth band by remounting
the four lug bolts on the disk hub.
b. Reverse the angle of the assembly by removing
the two 1/2" bolts holding the disk assembly, and
turning the disk assembly one half turn. Reinstall
the 1/2" bolts and set the disk angle.
Disk Blade Adjustments
Figure 3-24
11757
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