Great Plains 1007NT Material Rate - Manual (Page 25)

07/08/2009 150-290B
Great Plains Mfg., Inc.
23
16. Find this number (or the closest number to this) in
the drive setting chart. This gives Drive Type and
Native Grass sprocket sizes. If the setting needed is
below 42 revs/ac, the Rate Reduction kit is required
(see Operation Manual: Options).
17. Set the new Drive Type at the gearbox lever.
18. Remove the access panel at the right end of the
Native Grass box, and exchange the current Driven
sprocket for the new one (from the storage tree at
drill front).
19. As necessary, exchange installed sprockets at gear-
box with those from the Rate Reduction kit (see
instructions in kit).
20. Remove the crank handle from the wheel and store it
on the left ground drive weldment.
21. When drilling, check the amount of seed you are
using by noting the acres drilled, amount of seed
added to drill, and the level of seed in the box. If you
suspect you are drilling more or less seed than
desired, and you have accurately calibrated the drill
to you seed, you may need to change your sprocket
arrangement to compensate for your field conditions.
For example:
The closest setting to 69.9 revs/ac is:
67.32 (found in the standard rate table)
which is a configuration of:
Drive Type: 2
Driven Sprocket: 15T