GREAT PLAINS 1007NT, Operator'S Manual, Page: 73 / 86

Great Plains Manufacturing, Inc.
Appendix A - Reference 69
03/18/2019 150-290M
Native Grass Gearbox (Option)
Gearbox input is driven by a [60P] chain from the ground
drive.
Gearbox output sprocket chain drives Native Grass jack-
shaft. Output sprocket [A] and chain [B] change with
Rate Reduction.
Native Grass jackshaft input sprocket [C] (the seed rate
“DRIVEN” sprocket) is selected from the front storage
towers and ranges from [15T] to [24T] in 1 Tooth steps.
Native Grass jackshaft output sprocket drives final chain.
Sprocket [D] and chain [E] change with Rate Reduction.
See page 70 for complete final drive.
NG Gearbox Output Sprocket:
Standard drill: 19T
w/Rate Reduction: 12T
NG Gearbox Output Chain:
Standard drill: 108P
w/Rate Reduction:105P
NG Jackshaft Input Sprocket:
(“DRIVEN” based on rate charts
and calibration)
NG Jackshaft Output Sprocket:
Standard drill: 24T
w/ Rate Reduction kit: 17T
NG Final Drive Chain:
Standard drill: 176P
w/Rate Reduction: 178P
A
B
C
D
E
Figure 63
1007NT Native Grass Gearbox Input and Output
29004
60P
19T
19T
12i
12i
U
D
R
L
F
B
A
C
D
12i
12i
12i
12i
C
B
E