Great Plains PT8030 V1012 Operator Manual - Manual (Page 18)

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Section 2 Planter Operation
10/10/12 PT6030 and PT8030 Pull-Type Planter 401-032M
Great Plains Mfg., Inc.
2 to 1 Drive Reduction
2 to 1 Drive Reduction
Figure 2-5
15058
The 15/28 tooth drive sprocket located on the inner side of
the contact drive wheel assembly will give you a 2 to 1
drive reduction, and will reduce the planter transmission
speed to reduce planting rates by approximately 1/2.
IMPORTANT: After each sprocket combination adjust-
ment, make a field check to be sure you are planting at the
desired rate.
Contact Drive Wheel Spring
Adjustment
There are two down pressure springs, see Figure 2-5, on
each contact drive wheel. The down pressure is factory
preset and should need no further adjustment.
Tire Scraper (Optional)
Some soil types may require the use of the optional tire
scraper. The scraper prevents an excess of mud from
building up on lift tire that may hamper the contact drive
tire. Adjust the scraper so it does not contact the tire. See
Figure 2-7.
Tire Scraper
Figure 2-7
15027
Ridge Planting
Refer to Figure 2-8:
Lowering the wheel for ridge planting is accomplished by
inverting the cylinder mounting blocks.
To invert, first block under the frame to remove weight from
tires, remove the four 5/8” cap screws. Invert mounting
blocks and install cap screws. Torque per specifications,
see “Section 10 Appendix” on page
62.
Ridge Planting Adjustment
Figure 2-8
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