Great Plains 1005NT Assembly Instructions - Manual (Page 13)

Great Plains Manufacturing, Inc. Installation Instructions 11
06/02/2008 123-535M
Jackshaft Input Chain
The remaining chain may require modification prior to
installation.
45. Select one new:
136-100D CHAIN RL #40 107 PITCHES
The string count includes the main string , a short
string , two connectors and one offset link .
Open the chain at one connector clip .
If the drill has fertilizer or Native Grass capability
installed, it uses the full 107 pitches of the chain. Con-
tinue at step 47.
Shorten Chain for Seed-Only
When neither Fertilizer nor Native Grass are installed,
chain
needs to be reduced to 100 pitches.
Refer to Figure 10
46. Remove both chain connectors
and the 6-pitch
string (which is actually 5 pitches and an offset
link ). The 6-pitch string and one of the two con-
nector links (7 pitches total) are not used.
Install Jackshaft Input Chain
Refer to Figure 11 (gray arrows show chain direction)
47. Route the chain
around the 27T jackshaft input
sprocket, around the 15T clutch shaft output
sprocket, and over the 12T jackshaft input idler.
48. Connect the chain ends. Follow the chain clip orien-
tation recommendation in Figure 22 on page 23
49. Make final adjustments to the jackshaft weldment,
bringing the 27T input sprocket into alignment with
the input chain path. Tighten the mounting bolts to
torque specification.
50. Adjust the (lower, forward) input idler for 1 ⁄
2
in of
slack in the top span of chain .
51. Adjust the (upper, rear) meter drive idler for 1 ⁄
4
in of
slack in the front span of chain .
Figure 10
107-Pitch Chain Detail
28007
199
3
4
2
5
3
5
1
199
1
2 3 4
3 5
199
3
2
4
100 pitches
107 pitches
SEED ONLY
AND FERT.
NATIVE GRASS
Figure 11
Clutch to Jackshaft Chain
10950
199
199
199
199
200