Great Plains YP825AR Material Rate - Manual (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
3
3
Figure 7
Transmission Sprockets
34808
DRIVING
DRIVEN
4
4