Great Plains 2N-3020 Operator Manual - Manual (Page 32)

30
Section 3 Adjustments
2N-2420 and 2N-3020 Two-Section Folding No-Till Drill 196-164M-A 2/28/08
Great Plains Mfg., Inc.
The single-marker system is equipped with a needle valve
in the hydraulic hose line at the rod end of the marker cyl-
inder as shown in Figure 3-15. Turn the adjustment knob
clockwise to decrease or counterclockwise to increase
folding speed. Adjustments should be made for safe fold-
ing speeds at the tractor operating speed. Excessive fold-
ing speed could damage marker and may void warranty.
Figure 3-15
Speed Adjustment, Single Marker
Coulter Tines
Optional coulter tines are available for the front-mounted
coulters. In high-residue fields, the tines will help guide
residue under the coulters and openers to prevent plug-
ging. Under normal conditions these tines should not be
needed. Remove or install the tines as field condition war-
rant.
Seed-Lok
Optional Seed-Lok firming wheels provide additional
seed-to-soil contact. The wheels are spring loaded and do
not require adjusting. In some wet and sticky conditions
the wheels may accumulate soil.
To lock up firming wheels on 00 and 10 series openers, re-
fer to Figure 3-16. Hook one end of chain in the opener-
body hole just above the wheel arm (1). Pull firming-wheel
15625
Needle Valve
Slower Faster
arm (2) up as high as possible and wrap chain around
arm. Hook other end of chain in a link. Leave no slack in
chain; secure wheel arm in its highest position.
Figure 3-16
Seed-Lok Lock Up, 00 and 10 Series Openers
To lock up firming wheels on 20 series openers, remove
lock-up handle (1) from its keeper under drill walkboard.
Insert handle through hole in opener body as shown in
Figure 3-17. Hook handle around firming wheel (2). Pull
up on wheel until arm is secured by self-loading lock-up
spring (3).
To unlock firming wheels on 20 series openers, use lock-
up handle to lift firming wheel. With your free hand, reach
into opener body and unlatch spring from wheel arm.
Figure 3-17
Seed-Lok Lock Up, 20 Series Opener
NOTE: Openers in Figure 3-16 and Figure 3-17 are disas-
sembled for illustrative purposes only.
1
2
16856
17285
1
3
2