Great Plains 2015 Operator Manual - Manual (Page 18)

2015 Three-Point Soybean Machine 173-088M 4/18/05 16 Great Plains Mfg., Inc.
Section 4 Adjustments
Seed Lok
The seed lok option provides additional seed to soil con-
tact. The seed lok is spring loaded and does not require
adjusting. In some wet and sticky conditions the wheel
may accumulate soil and may require removal of the
seed lok until conditions improve.
The seed lok is attached to the shank with a 1/2" clevis
pin, see the Figure 4-9. To remove the seed lok, remove
the clevis pin and pull down on the seed lok mount.
Reattach in the reverse order.
Adjusting The Seeding Rate
1. Rotate each gauge wheel to see that feed cups and
drive are working properly and are free from foreign
matter.
2. To adjust your seeding rate, first you must decide
which drive type (gearbox) setting you need from
the seeding charts on next pages. The charts list
drive type settings 1, 2, 3 or 4. The drive system
uses a 4 speed gear box located above the drive
wheels. Move the selector handle on the gearbox
until the desired drive type number appears in the
handle’s window, Figure 4-100. Rotate the tires a
few turn to confirm the gearbox has engaged.
Seed Lok Assembly
Figure 4-9
12362
NOTE: Seeding rates will vary greatly with variations
in sizes of the beans. Although the seeding rates
listed in this manual are based on an average bean
size, we recommend that you test and adjust your
drill using the procedures listed below to help insure
an accurate seeding rate.
IMPORTANT! If your drill has more than one gearbox,
make sure both are shifted to the same drive type set-
ting. The drive type setting on the two brass indicator
plates for the 20’ drill are opposite of each other. Be sure
that the side of the brass indicator plate with the "4" is
the end closest to the center of the drill.
3. There are many factors which will affect seeding
rates: bean treatment, weight of bean, size of bean,
surface condition of bean, and tire configuration,
pressure and slippage. Minor adjustments will prob-
ably be needed to compensate for above factors.
4. The pounds-per-acre in the seed charts are based
on 20' drills having 11L x 15
" rib implement tires.
5. The large differences in bean size and treatment
can cause a wide variation in actual seeding rates.
The seed rate charts on the following pages are
based on average size seed. This may differ from
the seed you are using. Use the seed rate charts as
a guide. Set the pounds-per-acre desired at the in-
dicator number for your row spacing and complete
the following procedure to calibrate the drill for your
specific seed.
a. Place several pounds of seed over three of the
feed cups at the outboard drive end of one seed
box.
b. Pull the seed tubes out of these row units.
c. Raise the drill off the ground. If using a hitch, be
sure to insert transport lock pins or turn 90˚ hy-
draulic lock valve, depending on hitch style to
prevent injury should hydraulic system allow
drill to lower while working around it.
d. Place a container under the three seed tubes to
gather the seed as it is metered.
Seed Rate Adjustment
Figure 4-10
12095
Gear Box Ratios:
Setting 2 is 2.06 Times Faster Than 1
Setting 3 is 3.08 Times Faster Than 1
Setting 4 is 5.03 Times Faster Than 1