Section 3: Adjustments
OS1548 and OS1572 Overseeder (S/N ) 308-303M
11/28/18
36
Calibrate Small Seeds Seedbox
See page 24 for instructions on how to calibrate the
Main Seedbox.
1.
Refer to
Locate seed rate adjustment
lever at the rear of the seeder. Move lever to indicator
cup setting number obtained from the small seeds
seed rate charts starting on page 37. For best
results, first move adjustment lever all the way to the
left. Then move lever to desired setting, moving from
a lower to a higher number.
•
Increase seed rate if seed is lighter than average.
•
Decrease seed rate if seed is heavier than average.
2. Complete the following procedure to calibrate
dispersal rate for your specific seed.
a. Place several pounds of seed over three of the
seed cups at the outboard end of the Overseeder.
Do not
allow any of the seed to reach other cups.
b. Pull the seed tubes out of these three drops.
c. Support drive unit off the ground as follows:
•
Gauge wheel drive units
: Raise and support
drive tire (right tire) off the ground using a jack.
•
Rear roller drive units
: Raise and support rear
roller off the ground using a jack.
d. Rotate tire or rear roller to make sure drive system
is working properly and that the feed cups are free
from foreign matter.
e. Place a container under the three seed tubes to
gather seed as it is metered.
* Seed rates listed in charts for gauge wheel units are based
on Overseeder having 18 x 8.50 x 8 turf tires with 20 psi.
Model
No
Number of Rear Roller Rotations For:
1/10 Acre
1000 Sq.
Ft.
1/20
Hectare
100
Sq. M
OS1548
398
91
492
98.5
OS1572
265
61
327
66
Model
No
Number of Gauge Wheel* Rotations For:
1/10 Acre
1000 Sq.
Ft.
1/20
Hectare
100
Sq. M
OS1548
236
54
292
58
OS1572
157
36
194
39
IMPORTANT:
Seed rates provided in the charts may
be inconsistent with actual planting rates due to
seed size, weight, treatment, moisture content,
surface condition, ratio of inert material to seed,
different seed mixtures, humidity, tire size, tire
pressure, tire configuration, tire or rear roller
slippage, and ground preparation. Minor
adjustments may be needed to compensate.
IMPORTANT: Do Not
operate small seeds seedbox
with seed rate adjustment lever at -0- setting. Seed
cup damage may occur.
f. Rotate rear roller the number of rotations noted in
the table. Check the three feed cups to make sure
each cup has plenty of seed coming into it.
g. Weigh the seed which has been metered out and
divide that weight by three to get the number of
pounds or kilograms per seed cup.
h. Next, multiply number of pounds or kilograms per
seed cup by the number of seed cups on the grass
seeds seedbox to arrive at weight “A”.
i. If Weight “A” is calculated based on:
1/10 acre, then “A” x 10 = lbs/acre1000 sq ft, then
“A” x 43.56 = lbs/acre
1000 sq ft, then “A” x 1 = lbs/1000 sq ft
1/20 hectare, then “A” x 20 = kg/hectare
100 sq meters, then “A” x 100 = kg/hectare
100 sq meters, then “A” x 10 = kg/1000 sq m
j. If calculated grass seed rate is different than the
suggested settings in the charts, then increase or
decrease the seed cup adjustment lever.
3. Repeat calibration procedure if the results of the
calibration vary greatly with the chart.
Small Seeds Rate Adjustment Lever
Figure 3-22
NOTE:
If total weight for 3 seed cups is in
ounces, divide that weight by 48 instead of 3.
DO NOT operate seeder with seed rate adjustment lever
set on 0.
Small Seeds Rate Adjustment Lever
Seed
Cup
26972
