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Great Plains 2SNG30 Material Rate User Manual

Page 20

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18

2SNG24 & 2SNG30

Great Plains Manufacturing, Inc.

202-578B

12/01/2010

5.

Fill three or more compartments at least

1

2

full of

seed in the native grass box. Pull seed hoses off
openers under the compartments.

6.

Turn gauge wheel or crank several times to fill seed
cups with seed. Turn wheel or crank until seed falls
to the ground from each cup.

7.

Place empty container under the seed tubes to
gather the seed as it is metered.

8.

Note the Drive Type (see Figure 15), and native
Grass sprocket pair (see Figure 16 on page 19). This
information is needed for step 9 and for the calcula-
tions later.

9.

Rotate crank or gauge wheel for one acre, either as
tallied on the Acremeter, or as counted, based on the
table at right.

10. Check that the three seed cups have plenty of seed

coming into them.

This calibration procedure is shown in example on
page 20.

11. Weigh metered seed, and subtract the initial weight

of the container. Divide this number by 3 (number of
cups metered).

12. Multiply by the number of openers on the drill. This

equals the pounds per acre at this drive setting.
Refer to the formulas on page 20.

Note: Refer to the drive setting charts on page 21, the

numbers listed are the number of revolutions of
the native grass meter shaft at a particular drive
type and sprocket range.

13. To adjust this number, take the pounds per acre

divided by the shaft revolutions. This is the pounds
per shaft revolution.

Note: These settings are based on 9.5L-15 tires inflated

to factory specifications.

Revolutions for One Acre 2SNG24 2SNG30

Crank: Drive Type 1

151

122.5

Crank: Drive Type 1A

310.5

251

Crank: Drive Type 2

44.5

40

Crank: Drive Type 2A

101.5

82

Gauge Wheel

225

182

MeasuredSeed

EmptyContainer

3

-------------------------------------------------------------------------------------------

PoundsPerSeedCup

=

undsPerSeedCup

NumberOfOpeners

×

PoundsPerAc

=

Total Row Units

Model

Spacing

Rows

2SNG24-2810

10 inch

28

2SNG24-3875

7.5 inch

38

2SNG30-3610

10 inch

36

2SNG30-4875

7.5 inch

48

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