Great Plains 2525P Material Rate - Manual (Page 60)

Great Plains Mfg., Inc.
58
118-231B 03/23/2010
Sprocket Indexing (Stagger)
This chapter applies only to finger meters.
If you are planting:
• finger-metered,
• twin-row crops,
• at seed interval spacings above 6
1 ⁄
2
inches,
you can synchronize each pair of adjacent meters in a
twin row so that you achieve the maximum seed-to-
seed spacing between the units of the pair.
If you are planting:
- single-row,
- or with singulating meters,
- or a volumetric crop,
- or twin row with seed spacings below 6
1 ⁄
2
in,
this section of the manual, and the sprocket indexing
charts, do not apply to your operations.
If the initial indexing does not provide equal spacing,
see “Indexing Fine Adjustment” on page 67.
Refer to Figure 5
1. Find the chart for your row spacing, meter finger
count and desired seed population. Note the “Rear
Meter Sprocket Tooth #” value in the far right col-
umn.
2. Remove both meters of a row unit pair. Note that
tooth 1 and many of the other teeth on the driven
sprockets
, are stamped with a tooth number.
On front row unit:
3. Relax idlers on front meter drive by lifting the
spring off the rear post .
4. Lift chain off driven sprocket , and rotate sprocket
so that tooth 1 is as close as possible to straight up
(top dead center).
5. Re-engage chain and idlers, making sure chain is
taut at top, and that sprocket tooth 1 has not shifted
off TDC.
On rear row unit:
6. Relax idlers on rear meter drive by lifting the
spring off the rear post .
7. Lift chain off driven sprocket , and rotate sprocket
so that the tooth number called for in the chart is at
TDC (or is the same as the front row sprocket).
8. Re-engage chain and idlers, making sure chain is
taut at top, and that the designated sprocket tooth
has not shifted off TDC.
9. Re-install meters. No particular wheel orientation is
required during meter installation. The meter
engagement is symmetrical, and the results identi-
cal no matter how the coupler captures the meter
shaft.
28420
Figure 5
Sprocket Indexing
25417
1
2
3
5
4
6
1 2
3
4
1
5
6
2