Great Plains 2420P Operator Manual - Manual (Page 33)

2012-04-17 118-769M
31 Adjustments
Drive Speed Range Sprockets
Select the correct drive speed range sprockets for
your seed by referring to the Seeding Rate Charts
in the Seed Rate manual 118-960B.
Refer to Figure 31
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 Seeding
Rate Charts in the Seed Rate manual 118-960B..
Refer to Figure 32
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 31
Drive Speed Range Sprockets Adjustment
19214
1
2
3
Driven
3
Driver
Figure 32
Transmission Sprockets Adjustment
19215
1
3
3
Driver
2
Driven