Section 3: Seeding Adjustments
PS1572: Primary Seeder: 313-164M:
11/5/18
15
Calibrating & Adjusting Seeding Rate
1.
Use seed rate charts beginning on page 16 to
determine correct seeding rate. Make adjustments
as follows:
a. Decide which drive range is required (low or high
range). If necessary, change speed change
sprocket to accommodate correct speed range.
See
b.
Refer to
Move seed rate
adjustment lever to cup setting number obtained
from the seed rate charts. For best results, first
move adjustment lever all the way to the left and
then to the desired setting.
•
Increase setting if seed is lighter than average.
•
Decrease setting if seed is heavier than
average.
2. Complete the following procedure to calibrate the
rate for your specific seed.
a. Place several pounds of seed over three of the
seed cups at the outboard end of the seeder.
Do
not
allow any of the seed to reach other cups.
b. Raise the seeder off the ground and support is
safely, leaving the front roller to rotate freely.
c. Rotate front roller to see that the drive system is
working properly and the seed cups are free from
foreign matter.
d. Place a drop cloth under the seeder to collect all
seeds that are metered out.
e. Make sure each cup has plenty of seed falling into
them and no other cups are receiving seed.
f. Rotate front roller the number of rotations noted in
below.
Front Roller Rotation Table
Model
No
No. of Front Roller Rotations to Cover
1/10
Acre
1000 Sq.
Ft.
1/20
Hectare
100
Sq. M
PS1572
233
53
287
57
IMPORTANT:
Seed rates provided in the charts may
be inconsistent with actual planting rates due to
seed size, weight, treatment, moisture content, ratio
of inert material to seed, different seed mixtures,
humidity, & ground preparation. Minor adjustments
to the cup setting may be needed to compensate.
NOTE:
To determine seed rates for seeds not listed
in the charts, compare weight and size to those
listed and use a similar setting. Follow steps 1 to 3 to
calibrate seed rate.
NOTE:
A 1/2" bolt is threaded into the right-hand end
of the front roller shaft. Turn bolt clockwise for proper
seed cup rotation.
g. Be sure to check the three feed cups to make sure
each cup has plenty of seed coming into it.
h. 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.
i. 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”.
j. If Weight “A” is calculated based on:
1/10 acre, then “A” x 10 = lbs/acre
1000 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 = kgs/hectare
100 sq meters, then “A” x 100 = kgs/hectare
100 sq meters, then “A” x 10 = kgs/1000 sq m
k. 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.
Seed Rate Adjustment Lever & Four-Position Door Handle
Figure 3-4
NOTE:
If total weight for 3 seed cups is in
ounces, divide that weight by 48 instead of 3.
IMPORTANT:
Remember, field and seed conditions
will affect seeding rates. Check amount of seed
being using by noting acres or square feet seeded,
amount of seed added to the seeder, and level of
seed in the seed box.
It may be necessary to make minor adjustments to
the seeding rate if the seeder has been accurately
calibrated and is seeding more or less seed than
desired.
IMPORTANT: Do Not
operate seed rate adjustment
lever at -0- setting. Seed cup damage may occur.
Do Not
set door handles and seed rate adjustment
lever to the widest open position with seed in the box
unless complete clean out is desired
.
27778
Four-Position
Door Handle
Seed Rate
Adjustment Lever
Seed Cup
