Great Plains 3S-5000HDF Material Rate - Manual (Page 7)

Great Plains Manufacturing, Inc. Table of Contents Main Box Rates Setting Main Box Seed Rate 5
2012-06-04 Table of Contents Main Box Rates 195-325B
Main Box Seed Rate Calibration
Differences will exist between the tested seed and field
conditions used to generate the Seed Rate Charts, and
your seed and conditions. To accurately achieve your
target population, Great Plains recommends calibrating.
Perform the calibration with the drill raised for transport,
but with the opener frames lowered (if the openers are
raised, the clutches will disengage). Leave the tractor
hitched for movement control. Block the tires not being
used in the calibration.
If you have previously calibrated your acremeter (see
Operator’s manual), you can use it to tally acres.
1. Jack up the left drive gauge wheel assembly until the
left section is roughly level. Use blocks to ensure that
the section cannot fall if the jack relaxes, tips over or
fails.
2. Rotate the gauge wheels and check that the drives
and seed cups are engaged, working properly and
free from foreign material. If not already done, set
the Drive Type, Seed Rate Handle and Seed Cup
Doors across the drill. If fertilizer is loaded, remove
the fertilizer drive chain (unless you are
simultaneously calibrating fertilizer rate).
3. Not the previous reading on the acremeter, unless
you do not plan to rely on it for the calibration.
4. Check that your tires match factory specification and
are properly inflated. See the “Tire Inflation Chart”
in the Operator manual.
5. Record the weight of one to three empty containers
collectively large enough to hold seed metered for
6% of one acre.
6. Place several pounds of seed over three seed cups
on the outside end of the left drill box. Pull lower end
seed hoses off of these drops at the opener end.
7. Turn gauge wheel several times to fill seed cups.
Turn until seed drops to ground from each hose.
8. Place empty container(s) under the three hoses to
gather metered seed.
9. Turn gauge wheel until one acre is tallied on
acremeter (see table at right). While turning, check
that cups have ample seed coming into them.
10. Weigh metered seed. Subtract initial weight of
container(s).
Crushing Hazard:
Always have transport locks in place and frame sufficiently
blocked up when working on the drill. You may be severely
injured or killed by being crushed from a falling implement or
openers.
For example:
on a drill with a row spacing of:
7.5 inches
and row count of:
63
you desire to plant barley at:
49 pounds per acre
which, from the chart, is an initial Seed Rate Handle
scale setting of:
40
For example:
three empty 1.8 pound containers weigh:
5.4 lbs
Calibration Gauge Wheel Rotations
Drill Model Per Acre Per Hectare
2S-2600/F/HD/HDF 203 502
3S-3000/F/HD/HDF 175 432
3S-4000/F/HD/HDF 130 321
3S-5000/F/HD/HDF 104 271
For example: the containers weighed a total of 8.0
pounds after test:
2.6 lbs net
2.6 8.0 5.4 – =
NetWeight GrossWeight ContainerWeights – =