Great Plains 3P605NT Assembly Instructions - Manual (Page 3)

Great Plains Mfg., Inc.
Installation Instructions 3
08/25/2008 202-583M
Exchange 6ft (605NT or 3P605NT) Sprockets
On 6-foot models, the Native Grass drive shares the sin-
gle Drive Type gearbox, and uses the left rear output
shaft. The right rear shaft is Main Seed box.
Remove 6ft Gearbox Output Sprocket
Refer to Figure 3
9. Loosen the bolt and relax idler .
10. Remove the existing 45-pitch chain from both the
existing left rear gearbox output sprocket:
808-271C SPKT 40B16 X 36T SPLINE BORE
and from the Native Grass jackshaft input sprocket:
808-170C SPKT 40B17 X 3/4BORE W/KW&SS
The chain may be left on the idler .
11. Remove and save the snap ring from sprocket :
800-141C SNAP RING EXT F/PEERLESS G.B.
This snap ring is reused during the installation.
12. Remove and save sprocket . Store it in the kit
case for possible future use.
Install New 6ft Output Sprocket
13. Select one new:
808-160C SPKT 40B12 X 36T SPLINE BORE
Place this sprocket on the gearbox output shaft
where sprocket
was just removed at step 12.
14. Select one saved:
800-141C SNAP RING EXT F/PEERLESS G.B.
Secure sprocket on the shaft with the snap ring
.
Remove 6ft NG Jackshaft Input Sprocket
The Native Grass jackshaft input and output ends
have otherwise identical 17T keyway sprockets. The
input sprocket
is to the right, closer to the gearbox.
Do not remove the output sprocket .
Note: For sufficient clearance, you may need to loosen
other sprocket or bearing collar set screws, and
temporarily slide the jackshaft to the left.
Refer to Figure 4
15. Loosen one or two set screws in the 17T jackshaft
input sprocket:
808-170C SPKT 40B17 X 3/4BORE W/KW&SS
16. Remove and save the key:
168-127D 3/16 X 1 KEY
The key is re-used during this installation.
17. Remove sprocket . Store the sprocket in the kit
case for possible future use.
Install New 6ft NG Jackshaft Input Sprocket
18. Select one new:
808-100C SPKT 40B22 3/4B W/K.W. &SS
Place the sprocket on the jackshaft where sprocket
was just removed at step 17.
19. Select one saved:
168-127D 3/16 X 1 KEY
Insert it in the sprocket and shaft keyways.
If the shaft was moved, slide it back to the right.
20. Secure all set screws.
21. Re-mount 45-pitch chain around new sprockets
, and idler .
22. Adjust chain slack to
1 ⁄
4
in (6mm).
23. Skip to “Closeout”, step 23, page 6.
Figure 3
6-Foot Gearbox Output Sprocket
25162
1
2
21
20
U
D
F
B
L
R 14
53
1
2
21
20
1
21
14
21
Figure 4
6-Foot NG Jackshaft Input Sprocket
25162
3
20
U
D
F
B
L
R
13
52
53
21
14
53
14
20 3
20
3
20
13
20
52
20
13
2
52 53 1