Seeding adjustments – Great Plains 2SF30 Operator Manual User Manual
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2SF24/30
Great Plains Manufacturing, Inc.
155-015M-A
2014-01-09
Seeding Adjustments
1.
Raise outboard ends of drill boxes high enough to lift
the end wheels off the ground. Rotate gauge wheel
to see that seed cups and drive are working properly,
not binding and free from foreign material.
2.
To adjust your seeding rate, first you must decide
which sprocket arrangement you need (see seeding
charts on next pages). To change sprockets, remove
nut on the double speed change sprocket and turn
sprocket over. Loosen the idler arm bolt, put chains
on and tighten both bolts. (The lengths of the chains
will need to be adjusted in order to make this
change.)
3.
There are many factors which will affect seeding
rates, including seed treatment, weight of seed, size
of seed, surface condition of seed, and tire
configuration, pressure and slippage. Minor
adjustments will probably be needed to compensate
for these factors.
4.
The pounds-per-acre in the seed charts are based
on drills having 9.5L X 15 inch implement gauge
wheel tires.
5.
The large differences in seed 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 chart 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 drill for your specific seed.
Repeat procedures (a) through (f) on each drill section.
6.
You may want to repeat the calibration procedure if
the results of your calibration vary greatly from the
suggested setting contained in this manual.
Tire size and field conditions will also affect seeding
rates. Be certain that your drill tires are 9.5L x 15" and
that they have the proper inflation. When drilling, check
the amount of seed you are using by noting acres drilled,
amount of seed added to drill, and level of seed in drill
box. If you suspect that you are drilling more or less than
desired, and you have accurately calibrated the drill to
your seed, you may need to adjust the seeding rate
slightly to compensate for your field conditions.
Note: This drill is equipped with four-position feed cup
door on each feed cup. The highest handle
position is for wheat and other small grain seeds,
the second handle position is for soybean and
other large grain seeds. Should excessive
cracking occur to the large seeds, drop the handle
to the third position. The wide-open position will
allow complete clean out of the feed cup. MAKE
SURE all handles are in the same position before
drilling.
Note: DO NOT open the cup up to the wide-open
position with seed in the box unless complete
clean out is desired.
a. Place several pounds of seed over three of the
seed cups at the outboard end of the drill box.
b. Pull the seed tubes off of these three disk
openers
c. Raise the drill 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
approximately 225 rotations on a 24 foot drill and
approximately 182 rotations on a 30 foot drill. Be
sure to check the three seed cups to make sure
each cup has plenty of seed coming into it.
f. Weigh the seed which has been metered. Divide
by three. This will give you the ounces/pounds
metered by each seed cup. Multiply by the
number of openers on your drill to arrive at the
total pounds-per-acre your drill would meter at
that setting. If the seeding rate is different than
desired, set your seed cup adjustment lever
accordingly.