Great Plains 1520P Operator Manual - Manual (Page 33)

5/6/2010 118-732M
31 Adjustments
Drive Speed Range Sprockets
Select the correct drive speed range sprockets for
your seed by referring to the Seed Rate Charts
beginning on page 96.
Refer to Figure 29
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 97.
Refer to Figure 30
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
in
slack in its longest span. Tighten idlers and install
lynch pins.
Set the same transmission sprocket combination
on both gauge wheels.
Figure 29
Drive Speed Range Sprockets Adjustment
18277
1
2
3
Driven
3
Driver
Figure 30
Transmission Sprockets Adjustment
18278
1
3
3
Driver
Driven
2