Great Plains 2SBM30 Operator Manual - Manual (Page 17)

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15 5/3/05 Great Plains Mfg., Inc.
Section 4 Seeding Adjustments
2SBD30 30-Foot, Folding, Soybean Machine 173-086M
Seed Rates
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 sprocket arrangement you need (see seeding
chart). In order to change sprockets, remove nut in
center of double speed change sprocket and turn it
over. Loosen the idler arm bolt, put chains on and
tighten both bolts. (The chains need to be reversed
to make this change.)
3. There are many factors which will affect seeding
rates: seed treatment, weight of seed, size of seed,
surface condition of seed, and tire configuration,
pressure and slippage. Minor adjustments will prob-
ably be needed to compensate for the above factors.
4. The pounds-per-acre in the seed charts are based
on machines having 9.5L x 15" rib implement gauge
wheel tires with proper air pressure. "Section 2 Tire
Inflation Chart" on page 7.
5. The differences in seed size and treatment can
cause a wide variation in actual seeding rates. The
seed rate chart below is 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 indicator number for your row
spacing and complete the following procedure to
calibrate the machine for your specific seed.
NOTE: Seeding rates will vary greatly with variations
in sizes of the seeds. Although the seeding rates list-
ed in this manual are based on an average seed size,
we recommend that you test and adjust your ma-
chine using the procedures listed below to help in-
sure an accurate seeding rate.
a. Place several pounds of seed over three of the
feeder cups at the outboard end of one seed
box.
b. Pull the seed tubes out of these openers.
c. Raise the machine off the ground.
d. Place a container under the three seed tubes to
gather the seed as it is metered.
e. Rotate the drive gauge wheel until one acre has
been tallied on the acremeter. This will be ap-
proximately 182 rotations on a 30’ machine. Be
sure to check the three feeder cups to make
sure each cup has plenty of seed coming into it.
f. Weigh the seed which has been metered. Di-
vide by three. This will give you the ounces/
pounds metered by each feeder cup. Multiply by
the number of openers on your machine to ar-
rive at the total pounds-per-acre you would
meter at that setting. If this figure is different
than desired, set your feed cup adjustment lever
accordingly. Repeat procedures (a) through (f)
on both sections.
6. You may want to repeat the calibration procedure if
the results of your calibration vary greatly from the
suggested settings contained in this manual.
REMEMBER: Tire size and field conditions will also af-
fect seeding rates. Be certain that your gauge wheel
tires are 9.5L x 15" and that they are inflated to the cor-
rect pressure. See "Section 2 Tire Inflation Chart" on
page 7. When planting check the amount of seed you
are using by noting acres planted, amount of seed add-
ed to machine and level of seed in box. If you suspect
that you are planting more or less seed than desired,
and you have accurately calibrated the machine to your
seed, you may need to adjust the seeding rate slightly to
compensate for your field conditions.
Section 4
Seeding Adjustments
Seed Rate Chart
(Pounds per acre)
Setting number 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Soybeans
Dr
iv
e T
ype
1 0 0 8 10 17 25 30 34 40 49 54 60 68 73 78 82 93 94 95 96
Wheat 1 0 6 10 14 19 24 29 34 39 44 50 59 60 67 73 79 87 88 91 92
Cotton 1 2 4 6 10 12 16 18 22 26 28 34 38 40 42 50 58 64 68 70 72
Milo 2 1 4 6 9 12 14 18 22 23 27 32 33 36 39 41 44 52 53 54 55
Seed sizes vary. These Charts were calculated with average size cleaned seed. We strongly recommend that you test and adjust your
machine for accurate planting of your seed variety.