Great Plains 3S-4010HDF Material Rate - Manual (Page 5)

Great Plains Mfg., Inc.
3
01/29/2009 196-522B
Setting Drive Type
Refer to Figure 1
Drive Type is determined by the size (tooth count) of a
sprocket on the seed jackshaft
of each drill section. If
changed, the sprocket must be set identically on each
drill section (3 locations).
For correct Drive Type, refer to seed-rate charts begin-
ning on page 8. The charts list Drive Types as 1, 2, 3 or
4. Each Drive Type corresponds to a specific sized
sprocket, per the table and Figure 2 at right.
Changing Drive Type
Refer to Figure 1
1. Loosen top idler and slide idler up.
2. Lift drive chain off sprocket currently in use.
3. Remove lynch pins and rearrange sprockets on jack-
shaft
.
Note: Sprockets are stored on both ends of jackshaft (1
alternate sprocket under the Drive Type sprocket,
and 2 alternates (plus Fertilizer alternates) on the
far end of the shaft.
Do not mix Drive Type sprockets with Fertilizer
sprockets on the vertical storage trees.
4. Sprocket corresponding to the required Drive Type is
remounted as the outermost (, with larger side of
raised hub away from pin, keeping teeth aligned with
driving sprocket at top). Make sure all 4 sprockets
are accounted for when remounting them on the
shaft.
5. Remount drive chain on the outermost (Drive Type)
sprocket.
6. Re-engage top idler and secure. Allow 1 ⁄
2
in (1.3cm)
slack in longest (top) span of chain.
7. Set the same Drive Type on all three drill sections.
Figure 1
Drive Type 1 Configured
28178
Drive
Type
Sprocket Relative Speed
1 72 Tooth Slowest
2 34 Tooth 2.12 times faster than Type 1
3 23 Tooth 3.13 times faster than Type 1
4 14 Tooth 5.14 times faster than Type 1
1
2
3
1
2
3
1
Figure 2
Drive Type Chain Routing
18839