20 Operation
MAN0988 (11/5/2012)
Figure 20. Seed Box Cover and Brace
Seed Rate Adjustment
Tractor speed and seed flow settings are critical for
proper seed population. Use the calibration tray to
adjust the seed cups for the desired seeding rate. Trac-
tor speed (normally 2-5 mph) should be established so
that uniform seed incorporation occurs with the action
of the rollers. A standard sprocket (15/30 tooth) and
reduced speed sprocket (15/40 tooth) are available for
a wide range of seeding rates. See Figure 27.
Slow down kits are available to reduce seeding rates
even further if required. P/N 1036395, PSS slow chain
drive accessory, provides chains and sprockets that will
reduce seeding rates by approximately 50% for the
native, primary, and legume seed boxes. P/N 1036396,
PSS Super slow chain drive accessory, provides
chains and sprockets that will reduce seeding rates by
approximately 75% of the standard drive for all three
seed boxes.
Seed rates in the native seed box may be increased by
removing the gaskets and retainers. Removing the
gasket kit will speed up seeding rates by approximately
30%.
Seed Rate
Adjust the flow control lever (Figure 21 and Figure 24)
as needed for the seed being used and the population
desired. To adjust, loosen the plastic knob, move to
desired position and re-tighten the knob.
Figure 21. Primary Seed Rate Adjustment Lever
Figure 22. Pointer, Primary Box
Before seeding an area, adjust the top link so that it is
in the middle of the slot with the seeder on the ground.
NOTICE: It is normal for the disc version to pitch
forward at maximum front tool angle.
Figure 23. Primary Seed Cup Concave Adjustment
DP16
DP18
Concave Open -
Maximum Position
Concave
Closed
Concave
(Rev. 1/08/2020)
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