Great Plains 3S-4010HDF Material Rate - Manual (Page 19)

Great Plains Mfg., Inc.
17
01/29/2009 196-522B
Fertilizer Rate Calibration
Differences will exist between the tested fertilizer and
field conditions used to generate the Rate Chart, and
your fertilizer and conditions. To accurately achieve your
target application, Great Plains recommends calibrating.
Perform the calibration with the drill lowered to field posi-
tion. Shut off power to the clutches.
If you have previously calibrated your acremeter (see
Operator’s manual), you can use it to tally acres.
Refer to Figure 9
1. Lower drill. Set MASTER switch on clutch control
box to OFF position.
2. Remove the calibration crank from its storage loca-
tion on the right section drive. Remove pin from
crank and return to storage stob.
3. On the right drill section, if seed rate is not also being
calibrated at the same time, and seed is present,
remove the seed box drive chain.
Refer to Figure 10
4. Install crank on clutch shaft of right section.
Crank rotation is clockwise, facing to drill left.
5. Use crank to turn clutch shaft and check that the
drives and seed cups are engaged, working properly
and free from foreign material.
6. From the charts, configure the Range and Transmis-
sion sprockets based on the target or density-
adjusted application rate.
7. Record the weight of one to three empty containers
collectively large enough to hold fertilizer metered for
6% of one acre or hectare.
Figure 9
Stored Calibration Crank
29240
Figure 10
Installed Calibration Crank
28180
For example:
you desire to apply 60lb/cu-ft material at a rate of:
141 lb/ac
on a 64 row 7.5in drill.
Per the density adjustment on page 14,
the adjusted rate is:
155 pounds/acre
Per the chart, the drive system setup is:
HIGH Range, and
12T/21T Transmission (Driver/Driven)
For example:
three empty 8 oz. containers weigh: 1.5 lb.