Great Plains 3S-3000HDF Operator Manual v1 - Manual (Page 64)

60 3S-3000/F/HD/HDF Table of Contents Index Great Plains Manufacturing, Inc.
195-441M Table of Contents Index 2014-07-01
Marker Chain Adjustment
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 61
Marker Lifting Slack
1.
Start with the marker in the unfolded position.
2. Loosen jam nuts . Back the full threaded
adjustment bolt toward nuts until the head extends
as little as possible.
3. Slowly fold the marker, observing the motion of the
disk.
If the marker disk slides across the ground more
than about a foot (30cm) before the chain and
linkage lifts it up, the chain is too long. Shorten the
chain by moving the clevis
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
one or two
links toward the end of the chain to make it longer.
Marker Folding Slack
1.
After the adjustments in step one have been
completed, fold the marker.
2. The full threaded adjustment bolt 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.
3. Lock the bolt in this position by tightening the jam
nuts
on either side of upright channel.
FigureSpacer
Figure 61
Marker Chain
15669
1
2
3
1
2
3
3
2
1