Great Plains 3N-4020 Operator Manual - Manual (Page 86)

82 3N-4010F/3N-4010HDF/3N-4020F Table of Contents Index Great Plains Manufacturing, Inc.
196-359M Table of Contents Index 2013-10-29
10HD Seed-Lok™ Lock-Up
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 condi-
tions the wheels may accumulate soil. To avoid problems
associated with this, you can lock-up the firmers.
Refer to Figure 109 (which depicts a row unit with the opener
blades removed for clarity)
To lock up Seed-Lock wheels:
1. Pull firming-wheel arm up as high as possible.
2. Flip the lock tip to hold the arm up.
10HD Press Wheel Adjustments
Opener Depth (Press Wheel Height)
Seeding depth on 3N-4010F, 3N-4010HDF and
3N-4020F is set by frame-mounted coulter depth (if
installed) and row unit depth. Set frame height (page 63)
before making row unit depth adjustments.
10HD Series press wheel height is a stop adjustment
and not a spring adjustment. It establishes a fixed rela-
tionship between opener depth and the closed-furrow
surface at the press wheel
Refer to Figure 110
Set opener seeding depth by adjusting press-wheel
height
. To adjust, first raise openers slightly, then lift
and slide T handles on top of openers. Initially adjust
all press wheels to the same height. Individual rows run-
ning in tire tracks may need to be set deeper
a
.
• For more shallow seeding, slide T handles forward
toward drill.
• For deeper seeding, slide T handles backward
away from drill.
If press wheels are lifting off ground, check front-to-back
level, and increase row unit spring down force.
If press wheels are digging into ground, reduce spring
down force at the row units.
Figure 123: 10HD Series
Seed-Lok™ Lock-Up
27072
2
1
2
2
a. If frame-mounted coulters are installed, adjust them for tire tracks before adjust T-handles. The coulter depth adjustment may be all
that’s required to compensate for tracks.
Figure 124: 10HD Series
Initial Opener Depth
27124
1
2
F
B