Great Plains 2000 Operator Manual - Manual (Page 18)

15
Section 3 Adjustments
2012-03-27 12, 15 and 20 Foot Series Three-Point Drills 118-389M-A
Great Plains Mfg., Inc.
1220, 1520 and 2020
To adjust down pressure, raise drill. Refer to Figure 3-4.
Use a crowbar or other lever to lift spring plate (1) off re-
movable pin (2). Remove pin, then move spring plate to a
new position. Replace pin to hold spring plate in its new
position.
Figure 3-4
Opener Spring Adjustment, 20 Series Openers
Move spring plate forward to decrease down pressure.
Move spring plate back to increase spring pressure. Fig-
ure 3-5 shows maximum and minimum spring settings.
Maximum Pressure Minimum Pressure
Figure 3-5
Spring Pressure, 20 Series Openers
A spring in the press-wheel mechanism creates down
pressure on the press wheels. The amount of force need-
ed to close the seed trench will vary with field conditions.
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To adjust, move adjustment lever shown in Figure 3-6.
• For less down pressure, move handle forward toward
drill.
• For more down pressure, move handle back away
from drill.
Figure 3-6
Press Wheel Adjustment, 20 Series Openers
Opener Depth
Set opener seeding depth by adjusting T-handles. To
adjust, first raise drill slightly, then lift and slide T-handles
on top of openers as shown in Figure 3-7. Adjust all T-han-
dles to the same setting.
• For shallower seeding, slide T-handles forward to-
ward drill.
• For deeper seeding, slide T-handles back away from
drill.
Figure 3-7
Opener Depth
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