Great Plains 2525F Material Rate - Manual (Page 4)

Great Plains Mfg., Inc.
2
118-232B 03/22/2007
Setting Drive Type
Drive type is a ground drive sprocket combination that
must be mounted identically on both gauge wheel
assemblies.
Before setting the drive type, rotate the gauge wheels.
Check that seed cups, seed tubes and drives are
working properly and free from foreign material.
Select the drive type from the seed rate charts. The
drive type varies by seed type and intended popula-
tion.
Refer to Figure 1
1. Find your drive type in the seed rate charts of this
manual.
2. Find the drive type sprocket pair required in the
table at the bottom of this page.
3. Loosen idlers and remove chain .
4. Remove retaining pins from shafts.
5. From the sprockets in use and those on the stor-
age tree
, select the required pair. Sprockets are
identified 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 in-
stalled 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
longest 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.
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
1
2
6
DRIVEN
Figure 1
Drive Type Sprockets
26210
4
5
DRIVING
3
3
1 2
3
4
5
6
4
2 1