Great Plains 2N-3020 Operator Manual - Manual (Page 22)

20
Section 3 Adjustments
2N-2420 and 2N-3020 Two-Section Folding No-Till Drill 196-164M-A 2/28/08
Great Plains Mfg., Inc.
Weight Chart, 24-Foot Drill
Weight Chart, 30-Foot Drill
NOTE: Optional markers, harrows and small-seed attach-
ments add about 25 pounds per coulter. Completely load-
ing the grain or small-seed boxes adds about 100 pounds
per coulter.
Coulter Springs
The coulter spring length is preset at 10 inches, giving the
coulter an initial operating force of 400 pounds. This set-
ting is adequate for many difficult no-till conditions. For
lighter no-till conditions where rocks or other obstructions
are a problem, you can lengthen the springs to protect the
coulters from impact. In heavier conditions, shortening the
spring will increase coulter force. Refer to the chart below
for adjusting the coulter springs.
Coulter Down-Pressure Chart
NOTE: Any attempt to reset the coulter spring length
shorter than 9 3/4 inches may contribute to premature fail-
ure of parts and warranty shall be voided. If additional
force is necessary, add weights to the implement.
Individual Coulters
When coulters follow in tire tracks and do not give satisfac-
tory depth, individual coulters can be lowered by loosen-
ing the mounting clamps and adjusting the coulter to the
desired setting.
To retighten clamps:
1. Snug the hex-head clamp bolts (1) just until the u-bolts
are tight on each side of the spring bar.
2. Tighten nuts on u-bolts (2).
3. Finish tightening the hex-head clamp bolts.
Figure 3-2
Individual Coulter Height Adjustment
NOTE: There may be as much as a 1/8-inch gap between
the clamp plates when the coulter is mounted securely.
Opener Adjustments
Depth-Gauging Wheels
The planting depth of each opener can be changed by ad-
justing the position of the depth-control wheels. To adjust
the height of the depth-control wheels, lift and slide the T-
handle at the rear of the opener as shown in Figure 3-3.
•
For shallower seeding, slide the handle toward the drill.
•
For deeper seeding, slide the handle away from the drill.
Figure 3-3
Opener Depth Adjustment
7 1/2-In.
Rows
8-In.
Rows
10-In.
Rows
Empty Drill, Pounds 17,400 17,100 16,600
Pounds Per Coulter,
No Weights 305 320 390
Pounds Per Coulter,
Brackets and 1000
Pounds Added
330 340 420
7 1/2-In.
Rows
8-In.
Rows
10-In.
Rows
Empty Drill, Pounds 20,200 19,600 19,100
Pounds Per Coulter,
No Weights 285 300 335
Pounds Per Coulter,
Brackets and 1000
Pounds Added
305 325 385
Spring Length Coulter Force
10 1/4 in. 300 lb.
10 in. 400 lb.
9 3/4 in. 525 lb.
10300
IMPORTANT: Never lower any coulter more than 1 1/2
inches. Tire damage could result as the drill is folded.
Also note that when the drill is in the raised position,
ground clearance on lowered coulters is reduced.
16644