Great Plains 1007NT Assembly Instructions - Manual (Page 4)

Great Plains Mfg., Inc.
4 Native Grass Rate Reduction Kit
202-582M 10/10/2008
Exchange N.G. Sprocket
Refer to Figure 7
18. Loosen the two set screws:
801-035C SCREW SET 5/16-18 SKT KP X 3/8
retaining 24T auxiliary shaft drive sprocket .
19. Remove the sprocket:
808-356C SPKT 40B24 7/8 HEX BORE W/SS
Store this sprocket and its set screws in the kit case
for possible future use.
Note: If there is insufficient clearance to remove the
sprocket from the shaft end (or install the new
sprocket ), it may be necessary to loosen the
set screws at a bearing lock collar , and tempo-
rarily slide the shaft left.
Refer to Figure 8
20. Select one new:
202-282D SPKT 40B17 7/8 HEX W/SS
and two new:
801-035C SCREW SET 5/16-18 SKT KP X 3/8
Mount 17T sprocket at the location of the 24T
sprocket removed at step 19. Secure the new
sprocket with the two set screws .
If shaft was moved, re-seat it to the right, and secure
the loosened collar.
Install New N.G. Chain
Refer to Figure 9
21. Select one new:
136-204D CHAIN RL #40 178 PITCHES
Mount this chain around the new sprocket , idlers
and , and the native grass box sprocket .
22. Adjust forward idlers to remove all but 1
1 ⁄
8
in
(29mm) of slack. Tighten bolts.
23. Apply some chain oil to all new chains.
Figure 7
Native Grass Jackshaft
28390
16
22
54
5
6
16
22
22
22
54
5
6
Figure 8
Native Grass Old Chain
25160
176-,
179- or
180 pitch
24T
7
8
54
13
7
4
U
D
B F
54
55
54
22
55
Figure 9
Native Grass New Chain (Bottom)
25160
178 pitch
17T
53
22
7
4
4
53
54
4 7 8
4