Great Plains 3N-4025P Operator Manual - Manual (Page 58)

3N-4010P, 3N-4015P, 3N-4020P and
3N-4025P
196-286M 4/23/2010
56
Electric Clutch Switch Adjustment
To adjust the height at which seed metering is
turned off, follow these steps.
Refer to Figure 82
1. Locate the height switch on the left hand rock-
shaft.
2. Lower the implement until it is at a height where
seeding should start (usually just above the
ground). Securely support frame at this height
with jack stands or blocks.
3. Turn off the tractor and remove the key.
Refer to Figure 83
4. Loosen the cam clamp (1) on the rockshaft and
turn until the switch roller (2) is just starting to
make contact with the ramp surface.
Refer to Figure 84
5. Raise the implement fully and check that the
switch is compressed as shown.
Keeton™ Seed Firmer
The optional Keeton™ Seed Firmer is a thin piece
of plastic which slides down the seed trench, trap-
ping seeds as they exit the seed tube and firms
them into the bottom of the “V”.
To adjust the Keeton™ Seed Firmer, lower the drill
until the disks of the openers are resting on the
ground.
Measure the distance from the ground to the head
of the tension screw. This distance should be 4” to
4 1/2”. If not loosen the bolts in the mounting brack-
et and select different holes until the proper
measurement can be attained.
Opener disk blades may be sharp. Use caution when
making adjustments in this area.
The Firmer is provided with a preset tension which
is recommended for using the first year. The ten-
sion 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.
20303
15160
14550
Figure 82
Height switch
Figure 83
Cam adjustment
Figure 84
Switch (compressed)