Great Plains 2420 Operator Manual - Manual (Page 14)

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Section 1 Preparation and Setup
2400, 2410 and 2420 Three-Point Drill 118-706M 5/15/06
Great Plains Mfg., Inc.
Models 2410 and 2420
Initially adjust drill so opener tube runs 21 inches above
ground when drill is lowered in field. See Figure 1-6.
Figure 1-6
Initial Operating Height
To adjust:
1. Loosen jam nut (1) near top clevis of each gauge-
wheel turnbuckle. Refer to Figure 1-7.
NOTE: Jam nut is left-hand threaded.
2. Bolt upper clevis in lower hole as shown in Figure 1-7.
3. Set turnbuckle length. Turn turnbuckle to shorten or
lengthen as necessary. Initially set length to 17 9/16
inches between pin centers to achieve the 21-inch di-
mension mention above. When adjusting the turn-
buckle length, remember:
•
Lengthening turnbuckle raises drill.
•
Shortening turnbuckle lowers drill.
Figure 1-7
Gauge Wheel Turnbuckle, Parallel-Arm Openers
12163
12067
4. After adjusting both turnbuckles to the same length,
tighten jam nuts.
5. Level drill with top three-point link. When drill is level,
opener tube will be higher than opener body with par-
allel links running slightly uphill. See Figure 1-8.
The 1- to 1 1/2-inch dimension shown in Figure 1-8 is
a general dimension that will vary with planting condi-
tions.
Figure 1-8
Leveling the Drill
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.