Great Plains EWNT7 1523Q-1630Q Operator Manual - Manual (Page 22)

EWNT7 and EWNT10 End Wheel No Till Drill 150-082M-A 4/25/06 20 Great Plains Mfg., Inc.
Section 4 Adjustments
Native Grass Drive
Native grass metering is directly related to the revolu-
tions of the clutch shaft per acre. The different sprocket
combinations are required to give a broad range of plant-
ing rates. The sprocket changes are made at the left end
of the drill, inside the double wall end panel. For native
grass seeding rates and sprocket combinations, refer to
page 21.
Native Grass Rate
Great Plains End Wheel No-Till Native Grass Drill has a
partition dividing the seed and native grass compart-
ments. Capacity of the seed box is 1.3 bushels per foot,
and the capacity of the native grass box is 1.2 bushels
per foot.
If the native grass is not being used, remove the chain
from the native grass drive sprocket to eliminate wear on
the native grass drive system.
Native Grass Seeding Adjustments
1. Rotate the drive wheel to see that the feed cups and
drive are working properly and are free from foreign
matter
NOTE: Seeding rates vary greatly with variations in
types of seeds being drilled. The seed rate chart on
the following page is based on a seed mix of 5.7# of
pure live seed per 11.1# of bulk. The pure live seed
mix was Big Blue-1.5#, Little Blue-.8#, Side Oats
Grama-.6#, Western Wheat Grass-1#, Switch
Grass-.3#, and Indian Grass-1.5#. Factors which af-
fect seeding rates are: weight of seed, size of seed,
relative humidity and moisture content of the seed it-
self, ratio of inert material to seed, different propor-
tions of seed types affecting density, and tire
configuration, pressure and slippage. We recom-
mend that you test and adjust your drill using
the procedures listed below to help insure an ac-
curate seeding rate.
Refer to Figure 4-8:
2.
To adjust you seeding rate, first find the row spacing
and the desired pounds/acre on the native grass
seed rate chart {see "Seeding Chart"}. Determine
which sprocket combination is required for the clutch
shaft sprocket and the upper shaft sprocket. This
sprocket combination is designated by the drive
types A, B, D, and D. From the chart, choose the
driver and driven sprocket combination that will de-
liver the desired native grass seed rate. In order to
change sprockets on the native grass unit, loosen
the idler arm and remove the chain, remove the
lynch pins on the driver and driven sprockets and re-
arrange the sprockets accordingly.
3. The pounds-per-acre in the seed chart is based on
drills having 9.00 x 24 drill rib tires.
4. After setting up your sprocket arrangement, com-
plete the following procedure to calibrate the drill for
your specific seed type.
a. Fill three or more compartments at least one-
half full of seed at the outboard end of the drill.
b. Pull the seed tubes off the openers under the
compartments.
c. Lower the drill hydraulically to planting position
in order to activate the clutch.
d. Raise the drive (left) end tire off the ground us-
ing jack.
e. Place a container under the seed tubes to gath-
er the seed as it is metered
f. Rotate the tire until one acre has been tallied on
the acremeter. This will be approximately 422
rotations on a 10’ End Wheel No-Till Drill; and
592 rotations on a 7’ End Wheel No-Till Drill. Be
sure to check that the feeder cups have plenty of
seed coming into them.
g. Weigh the seed which has been metered. Di-
vide by the number of cups that were metered.
This will give you the ounces/pounds metered
by each feed cup. Multiply by the number of
openers on your drill to arrive at the total
10112
Sprocket Arrangement Diagram
Figure 4-8
11837