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Meter/Seed Rate Adjustment
1. If the seed meter shaft is disassembled for
maintenance or repair the seed meters and
adjustment handle will need to be reset or zeroed to
set the meters equally across the section.
2. To reset the meters, loosely reassemble the shaft,
meters, spacers, locking collars, etc. but leave the
locking collars loose.
3. Tighten the locking nut on the threaded seed shaft
adjustment to hold the shaft in place.
4. Start with the end meter(s) next to the threaded
adjustment
See Figure
cut-off to the right until the indicator reads zero on the
end meter. Remove any remaining slack between the
spacers, washers, feed rolls etc. and secure the lock
collars on each end of that group of meters. Continue
to work across the drill section sliding the meter feed
rolls to the right, removing any slack, and securing
the lock collars for each group of meters.
5. With all lock collars secure on the seed shaft and all
slack removed from between the spacers, verify that
each meter is actually zeroed out. The feed roll
should not be protruding or recessed inside any of
the meters. To fine tune each meter, if necessary,
loosen the two bolts holding the meter housing to the
bottom of the seed box. Slide the meter housing to
the right or left, until the meter is zeroed out. Re
tighten the meter housing to the bottom of the seed
box. The meter housing should be square with the
seed shaft and not twisted when tightening the meter
housing bolts.
4-22. Slide the feed roll and
OPERATION AND MAINTENANCE
Seed Rate Calibration
1. The seed rate charts are in pounds per acre and
based on an average seed size
Several factors can influence seeding rates: seed
varieties, seed size, seed weight, seed treatment,
seed cleanliness, tire pressure, tire slippage, and tire
size.
IMPORTANT
The operator must verify actual seed output before
planting to insure the desired seeding rate.
2. If the specific seed is not listed on the seed chart,
pick a similar seed size and check the seed
calibration for the desired rate.
3. To check the seeding rate:
a. Adjust the seeding rate and drive type to the
desired rate from the seed chart
Figure
4-26.
b. Select three seed meters next to each other, and
disconnect the rubber seed tubes to be able to
catch the seed.
c. Fill the box with a sufficient amount of seed over
the three meters.
d. Collect the seed from the three seed meters as
you rotate the drive wheel by hand. Count the
total number of rotations. Twenty rotations would
be a good starting point; more rotations will
produce more accurate results.
e. Weigh (in pounds) the total amount of seed and
divide by 3 for an average amount of seed per
meter.
See Figures 4-26
4. Adjust the seed meter rate to compensate for any
variation, and repeat the seed calibration until the
desired seeding rate is achieved.
5.
See Figures 4-26
for rate and number of seeds per
row formulas.
See Figure
4-26.
See
for seed rate formula.
4-21
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