Great Plains 3P4025AH Operator Manual - Manual (Page 69)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 65
2014-07-29 Table of Contents Index 411-099M
d. Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, and will require more effort. The extra force
may also damage tools.
e. Install lift assist cylinder locks. Lower parking stands.
f. Set the down pressure spring cam to zero, per the
instructions on page 53.
g. Raise the row unit high enough that the hole for the
pin is above the lower parallel arm. This can be done
in several ways, including:
a. use a hoist at the rear of the shank
b. use a jack under the shank extension
Crushing Hazard:
Use a jack or hoist. Raising a row unit on a block by lowering
the planter is risky. The potential for hydraulic failure creates
a safety hazard. Full lowering can damage components.
Refer to Figure 72
h.
Remove the pin from the storage hole and insert
and secure it in the lock-up hole .
i. Lower row unit until lock-up pin rests on lower
parallel arm.
Seed Firmer Adjustments
Series 25 row units include a standard seed flap, and
accept one of two optional seed firmers (which may be
included in your selected opener bundle).
Sharp Object Hazard:
Row unit disk blades may be sharp. Use caution when making
adjustments in this area. To adjust the Keeton Seed Firmer,
lower the planter until the disks of the row units are resting on
the ground.
Keeton Seed Firmer Adjustment
The optional Keeton Seed Firmer is an engineered
polymer shape that slides down the seed trench. It traps
seeds as they exit the seed tube and firms them into the
bottom of the “V”.
Refer to Figure 73
The Firmer is provided with a preset tension which is
recommended for using the first year. The tension
screw
can be tightened in subsequent years
according to your needs. Firmers should provide just
enough tension to push seeds to the bottom of the
trench.
Certain Machine Damage:
Do not pin the row unit while it is in the lowered position.
If the pin is inserted below the parallel arm, unit damage
occurs as soon as planting begins.
Figure 72
25AP Row Unit Locked Up
29756
3
4
5
2
3
Figure 73
Keeton Seed Firmer
28316
1
1