Great Plains 2020P Operator Manual - Manual (Page 98)

2010P and 2020P
118-740M 4/23/2010
96
Sprockets
Drive Speed Range Sprockets
Select the correct drive speed range sprockets for
your seed by referring to the Seed Rate Charts
beginning on the next page.
NOTE: The following seed rate charts cover all
drill models and series openers for the 20’, 24’,
and 25’ precision drills.
Refer to Figure 74
Loosen idler (1) and remove chain (2). Remove
retaining pins (3) from shafts and install speed
range sprockets as necessary.
NOTE: Make sure the correct sprockets have
been installed in the DRIVER and DRIVEN lo-
cations as shown.
Reroute chain over sprockets and idlers as
shown. Move idler into chain so chain has 1/4-
inch slack in its longest span. Tighten idler and in-
stall retaining pins.
Set the same drive range sprocket combination
on both gauge wheels.
Transmission Sprockets
To change the seeding rate, change the transmis-
sion sprocket combination. Refer to the Seed
Rate Charts beginning on page 6.
Refer to Figure 75
Loosen idler plate (1) and remove drive chain (2).
Remove lynch pins (3) from shafts and rearrange
drive and driven sprockets as necessary.
Reroute drive chain over sprockets and idlers as
shown. Move idlers into chain so chain has 1/4-
inch slack in its longest span. Tighten idlers and
install lynch pins.
Set the same transmission sprocket combination
on both gauge wheels.
Figure 74
Drive Speed Range Sprockets Adjustment
18277
1
2
3
Driven
3
Driver
Figure 75
Transmission Sprockets Adjustment
18278
1
3
3
Driver
Driven
2
Seed Rate Charts