Great Plains 2420F Operator Manual - Manual (Page 21)

8/14/2006
19 Preparation and Setup
HD 10 Series Openers with Single Gauge Wheel
Refer to Figure 10
Initially adjust drill so bottom of opener tube runs 26
inches above ground when drill is lowered in the
field.
Refer to Figure 11
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 1/2 inches between pin centers to
achieve the 26-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 12
NOTE: When drill is level, parallel links will be run-
ning level or 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 10
Initial Operating Height
24046
Figure 11
Spring Linkage
22847
Figure 12
Leveling the Drill
24047