Great Plains 2420F Operator Manual - Manual (Page 19)

8/14/2006
17 Preparation and Setup
Leveling the Drill
20 Series Opener Single Gauge Wheel
Refer to Figure 4
Initially adjust drill so bottom of opener tube runs
24 inches above ground when drill is lowered in
the field.
Refer to Figure 5
To adjust:
1. Make sure block mount of the spring linkage
(2) is in the lower mount hole for planting in
bedded irrigation. The upper hole is for non-
bedded ground.
2. Set spring linkage length. Turn spring linkage
to shorten or lengthen as necessary. Initially
set length to 6 1/8 inches between pin centers
to achieve the 24-inch dimension mentioned
above. When adjusting the linkage length, re-
member:
• Lengthening linkage raises drill.
• Shortening linkage lowers drill.
3. Level drill with top three-point link.
Refer to Figure 6
NOTE: When drill is level, parallel links will be run-
ning slightly uphill towards the front.
The 1-inch dimension shown is a general dimen-
sion that will vary with planting conditions.
IMPORTANT: Make sure the opener mount is
running higher than the opener body. This will
ensure an ample reserve for opener upfloat in
case the opener strikes a rock or other object.
Figure 4
Initial Operating Height
24301
Figure 5
Spring Linkage
21685
Figure 6
Leveling the Drill
23402