Great Plains YP1625 Material Rate - Manual (Page 3)

8/8/2006 401-226B
3 Planting Rate
Planting Rate
Adjusting the planting rate requires the following:
1. adjusting drive speed range sprockets,
2. adjusting transmission sprockets,
3. preparing seed meters,
4. checking planting rate.
Before setting the planting rate, rotate the gauge
wheel. 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,”
starting on page 19.
Refer to Figure 1
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 DRIVING and DRIVEN loca-
tions 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.
Transmission Sprockets
To change the planting rate, change the transmis-
sion sprocket combination. Refer to “Seed Rate
Charts,” starting on page 19.
Refer to Figure 2
Loosen idler (1) and remove drive chain (2). Re-
move lynch pins (3) from shafts and rearrange
driving 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.
Note: For seed rate calibration refer to “Check
Singulated Planting Rate,” on the next page.
Figure 1
Drive Speed Range Sprockets Adjustment
21974
1
2
3
Driven
3
Driving
Figure 2
Transmission Sprockets Adjustment
21974
Driven
Driving
1
2
3
2