CrustBuster 4600 Series, Operation Maintenance Manual & Parts List

Page: 13 / 86

11
Calibration, Seed Rates and Sprocket Box
Calibration/Drilling Rates
Planting the right rate can be frustrating.
Sometimes the end result is not what the rate
chart indicates. Seeding rate is affected by
seed size, seed treatments, foreign material,
test weight, and tire air pressure.
1. Always plant clean seed.
2. Check tire air pressure.
3. Seed treatments vary by type and time of
application.
Some seeds are treated at the processor. Drill
box treatments are common methods of appli-
cation. Each of these can "gum" up the wobble
slot cup halves and reduce final seeding rate.
Treated seed often flows differently than non-
treated seed.
A general method for checking quantities drilled
is as follows:
1. Set drill for desired seeding rate.
2. Fill the box level; then pull drill for a short
distance to settle seed. Refill box exactly
level full.
3. Drill a calculated one acre.
4. Carefully weigh the seed required to refill
the box level full.
5. Compare the amount used versus that
stated on the rate chart.
6. Adjust seeding rate by changing the
sprocket combination or wobble slot width.
One method involves catching seed from one
or more seed cups and utilizing a density scale
to determine actual rates. These scales are
commercially available, inexpensive and very
easy to use. Information can be obtained from
CrustBuster®/Speed King, Inc.
Sprocket Box Operation
The sprocket box design will enable the opera-
tor to set a wobble slot width once for a given
seed size and change rates by changing the
speed of the seed shaft. Choose a range of
seeding rates that you wish to operate in, set
the slot width as indicated by the chart and
simply change knob position with the slide
handle to effect seed rate. A narrow slot width
will produce more even distribution and spacing
in the row.
When changing derailleur, be sure openers
are rotated out of ground.
To change position, move throw-out lever
toward the rear to disengage the chain from the
lower sprocket. Pull the spring loaded collar
outward with two fingers and slide side to side
to the desired gear position. Pull throw-out
lever forward to re-engage the chain.
Sprocket Box