Great-plains YP825AR Material Rate User Manual download pdf (Page 17)

Great Plains Manufacturing, Inc. Table of Contents Metric Charts Planting Rate 13

2013-11-11 Table of Contents Metric Charts 401-923B

3. Rate: Range Sprockets

Range sprockets provide coarse control of seed rate.

Refer to Figure 6 and Figure 7

All Seed Rate charts specify a DRIVING and DRIVEN

sprocket combination for the Range. Crops with more

than one range are noted as “LOW RANGE” or

“HIGH RANGE” at the top of the chart.

To change Range:

a. Rotate the idler plate against the spring to

disengage the idler.

Remove the chain.

b. Remove pins from shaft ends at DRIVING and

DRIVEN sprockets, as well as at storage shaft.

c. Exchange sprockets so that new DRIVING and

DRIVEN sprocket tooth counts (stamped on sprocket

face) match chart. Re-pin all shafts.

d. Remount chain. Re-engage spring idler.

4. Rate: Transmission Sprockets

Transmission sprockets provide ﬁne control of seed rate.

Each chart row provides a rate adjustment of 2 to 3%.

Refer to Figure 7

Each Seed Rate chart row has a unique pairing of

DRIVING and DRIVEN Transmission sprocket.

To change Transmission:

a. Rotate the idler plate against the spring to

disengage the idler.

Remove the chain.

b. Remove pins from shaft ends at DRIVING and

DRIVEN sprockets, as well as at storage shaft.

c. Exchange sprockets so that new DRIVING and

DRIVEN sprocket tooth counts (stamped on sprocket

face) match chart. Re-pin all shafts.

d. Remount chain. Re-engage spring idler.

Figure 6

Range Sprockets

34807

DRIVING

DRIVEN

Figure 7

Transmission Sprockets

34808

DRIVING

DRIVEN

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 123 124

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Great-plains YP825AR Material Rate User Manual Page 17

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