Great Plains 2525P Operator Manual - Manual (Page 28)

24 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.
118-231M 2013-05-10
Ground Drive Adjustments
Seeding Rate
Adjusting the seeding rate requires the following:
1. adjusting drive speed range sprockets,
2. adjusting transmission sprockets,
3. preparing seed meters,
4. checking seeding rate.
Before setting the seeding rate, rotate the gauge
wheels. Check that seed meters, seed tubes and drives
are working properly and free from foreign material.
Drive Speed Range Sprockets
Select the correct drive speed range sprockets for your
seed by referring to the Seed Rate Charts manual
Refer to Figure 16
Loosen idler
and remove chain . Remove retaining
pins from shafts and install speed range sprockets
as necessary.
Make sure the correct sprockets have been installed in
the DRIVER and DRIVEN locations as shown.
Reroute chain over sprockets and idlers as shown. Move
idler into chain so chain has
1 ⁄
4
in slack in its longest
span. Tighten idler and install retaining pins.
Set the same drive range sprocket combination on both
gauge wheel assemblies.
Transmission Sprockets
To change the seeding rate, change the transmission
sprocket combination. Refer to the Seed Rate Charts
manual.
Loosen idler plate and remove drive chain .
Remove lynch pins from shafts and rearrange drive and
driven sprockets as necessary from storage
.
Driven shaft is also the sprocket storage shaft.
Reroute drive chain over sprockets and idlers as shown.
Move idlers into chain so chain has
1 ⁄
4
in slack in its long-
est span. Tighten idlers and install lynch pins.
Set the same transmission sprocket combination on
both gauge wheel assemblies.
Note: Each gauge wheel drives its half of the drill. If a
chain breaks or is removed, that half of the drill
does not plant.
1
2
8
DRIVEN
DRIVING
Figure 16
Drive Sprockets
26218
DRIVING
DRIVEN
6
7
3
3
1
4
RANGE
TRANSMISSION
1 2
3 4
6 7
8
8