Great Plains 2525F Operator Manual - Manual (Page 27)

Adjustments 23
01/23/2012 118-232M
Ground Drive Adjustments
Before setting the Drive Type, rotate the gauge wheels.
Check that seed cups and seed tubes are working prop-
erly and free from foreign material.
Setting Drive Type
Drive type is a ground drive sprocket combination that
must be mounted identically on both gauge wheel
assemblies.
Select the drive type from the seed rate charts. The drive
type varies by seed type and intended population.
Refer to Figure 19
1.
Find your drive type in the Seed Rate Charts man-
ual.
2. Find the drive type sprocket pair required in the table
on this page.
3. Loosen idlers and remove chain .
4. Remove retaining pins from shafts.
5. From the sprockets in use and those on the storage
tree
, select the required pair. Sprockets are identi-
fied by tooth count, which is stamped into the side of
the sprocket.
6. Install the DRIVING sprocket on shaft and the
DRIVEN sprocket on shaft .
Note: Make sure the correct sprockets have been
installed in the DRIVER and DRIVEN locations as
shown.
7. Replace unused sprockets back on the storage tree
.
8. Re-pin all shafts.
9. Re-mount the chain , engage the idlers , and
tighten the idlers until there is 1 ⁄
4
in slack in the long-
est span.
10. Set the same drive type sprocket combination on the
other gauge wheel assembly.
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
6
DRIVEN
FigureSpacer
Figure 19
Drive Type Sprockets
26210
4
5
DRIVING
3
3
1 2
3
4
5
6
4
2 1
Drive Type Driving Driven Speed
Type 1 14T 44T Slowest
Type 2 24T 36T 2x Type 1
Type 3 24T 24T 3x Type 1
Type 4 24T 15T 5x Type 1