Great Plains 3N-4025P Operator Manual - Manual (Page 103)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 99
2014-01-29 Table of Contents Index 196-538M
10 Series 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
conditions the wheels may accumulate soil. To avoid
problems associated with this, you can lock-up the
firmers.
Refer to Figure 132 (which depicts a row unit with the opener
blades removed for clarity)
To lock up Seed-Lock wheels:
1. Hook one end of chain in opener-body hole just
above wheel arm
.
2. Pull firming-wheel arm up as high as possible and
wrap chain around arm .
3. Hook other end of chain in a link. Leave no slack in
chain; secure wheel arm in its highest position.
10 Series Opener Depth
(Press Wheel Height)
Seeding depth on 3N-4010P, 3N-4010HDP, 3N-4020P
and 3N-4025P is set by coulter depth and row unit depth.
Set coulter depth before making row unit depth
adjustments.
10 Series press wheel height is a stop adjustment and
not a spring adjustment. It establishes a fixed
relationship between opener depth and closed-furrow
surface at the press wheel
Refer to Figure 133
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 Adjust all press
wheels to the same height.
• For more shallow seeding, slide T handles forward
toward implement.
• For deeper seeding, slide T handles backward
away from implement.
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 132: 10 Series:
Seed-Lok
®
Lock-Up
16856
3
2
1
1
2
3
Figure 133: 10 Series:
Initial Opener Depth
12100
1
2 B
F
1
2
F
B