Great Plains 20 Series Drill Assembly Instructions - Manual (Page 5)

5 1/23/07 12, 15 and 20 Series Drill Small Seeds Option 123-835M
Great Plains Mfg., Inc.
Assembly
Refer to Figure 8.
10. Working on back, left-hand side of drill, install two flush-
mounted bearings (1) using 5/16-by-1-inch carriage bolts (2)
in bearings. Slip two 17-tooth sprockets (3 and 4) over shaft
as shown.
11. Fasten idler arms (5) to mount bracket using bolt (6). Place
12-tooth plastic idler sprocket (7) on idler. Hold idler in place
with 1/2-inch flat washer (8) and cotter pin (9).
12. Align outer 17-tooth sprocket (4) with small-seeds-box
sprocket (10). Install 60-pitch chain (11). Remove chain
slack with idler sprocket.
Figure 8
Rear Drive
Refer to Figure 9.
13. Place chain shield (49) over end of box. Install handle (50)
using bolt (51) removed in step 2.
Figure 9
Handle and Cover, with Fertilizer
14. On 20-foot drills, repeat steps to install drive for right-hand
box.
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