Great Plains 2420F Operator Manual - Manual (Page 44)

1520F, 2020F, 2420F, 1510HDF, &
2010HDF
8/14/2006
42
Marker Chain
There are two, interrelated adjustments for the
marker chain. Make these adjustments in the follow-
ing order.
Refer to Figure 81
1. Lifting Slack. With marker unfolded, back full-
threaded adjustment bolt (1) down until head
extends as little as possible. Slowly fold marker
while observing disk. If marker disk slides
across ground more than a foot before chain
and linkage lifts it up, the chain is too long.
Shorten chain one or two links by moving clevis
(2). Check adjustment by repeating folding pro-
cess.
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. Correct this condition by lengthening chain
one or two links at clevis (2).
2. Folding Slack. Fold marker. Use full-threaded
adjustment bolt (1) to take slack out of chain
while marker is folded. Extend bolt until there is
no chain slack. Lock bolt in this position by tight-
ening nuts (3) on either side of upright channel
(4).
Transport Carrier
When marker is folded, the second section should
rest in transport-carrier saddle.
Refer to Figure 82
To adjust front-to-rear position of saddle, loosen the
5/8 X 7-inch u-bolts (1) that fasten transport-carrier
mount onto box frame. Slide transport-carrier as-
sembly forward or back as needed.
To adjust height of saddle, loosen 1/2-by-2-inch u-
bolts (2) that hold carrier tube to mounting bracket.
Slide carrier tube up or down as needed.
15632
Figure 82
Adjusting Marker Carrier
Shear Bolt
Figure 81
Marker Chain Adjustment
15669