Great Plains PT8030 V1012 Operator Manual - Manual (Page 22)

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Section 3 Row Unit Operation
10/10/12 PT6030 and PT8030 Pull-Type Planter 401-032M
Great Plains Mfg., Inc.
Seed Hopper
The row unit is equipped with one 2-bushel translucent
seed hopper.
Before filling the seed hopper, clear it of foreign objects.
After filling the hopper with clean seeds always replace the
hopper lid. Operating with the lids attached prevents ob-
jects from entering the hopper and also aids in keeping out
moisture.
Empty the contents of the hopper periodically to avoid the
collection of dirt and other materials. To remove the hop-
per, disengage the meter drive clutch and the hopper
latch, see arrows Figure 3-4.
Meter Clutch, Latch & Seed Hopper
Figure 3-4
12343
Chemical Hopper
The optional chemical hopper comes in 2 versions:
•
1 chemical meter and an 80 lb. capacity translucent
hopper
•
2 chemical meters and 1 divider that separates the 80 lb.
hopper into 2 compartments - approximately 40 lbs.
each.
Before filling the chemical hopper(s) clear it/them of for-
eign objects. After filling the hopper(s) replace the hop-
per(s) lid(s). Operating with the lids attached prevents
objects from entering the hopper and also aids in keeping
out moisture.
Chemical Hopper
Figure 3-5
14912
The application rate is determined by:
1. The size of the opening on the meter housing assem-
bly.
2. The travel speed.
The size of the opening is adjustable by turning the knobs
on the rear of the granular hoppers. There are 99 incre-
ments which indicate the relative application rate. The de-
livery rate will increase from 1 through 99. Setting 00
closes the opening completely. A fluted roller delivers the
granular chemical to the adjustable opening.
The granular chemical flows through a given opening size
at a nearly uniform rate regardless or rotor rpm. Therefore,
SPEED has the greatest impact on application rate and re-
sulting chemical concentration in the row.
For example, if planting speed is reduced from 6 to 3 mph,
chemical concentration will nearly double since the deliv-
ery rate through the orifice remains nearly the same while
the distance traveled in a given period of time has been cut
in half. Therefore, twice as much chemical is placed on the
ground due to the decrease in ground speed.
Rotor rpm will not change the chemical meter delivery rate
unless the seed population is changed significantly
(i.e. + 25 percent or more from the original setting).