Great Plains 20 Series Drill Assembly Instructions - Manual (Page 4)

4 12, 15 and 20 Series Drill Small Seeds Option 123-835M 1/23/07
Great Plains Mfg., Inc.
Assembly
Small Seeds with Fertilizer
Refer to Figure 6.
1. Working on back, left-hand side of drill, loosen round fertil-
izer jackshaft (1) in bearings. Slip 12-tooth sprocket (2) onto
jackshaft to position shown. On 20-foot drills, repeat step for
right-hand side of drill.
Figure 6
Assemble Sprocket on Fertilizer Jackshaft
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Refer to Figure 7.
2. Remove handles (1) from back side of fertilizer box. Save
bolts, nuts and handles.
3. Install left-hand mount (2) for small-seeds box using 1/2-by-
1-inch bolt (3) in walkboard end bracket (4). Place box spac-
er (5) between mount (2) and holes for fertilizer-box han-
dles. Use 1/2-by-2 1/4-inch bolts (6) and reuse hex-flange
lock nut (7) on inside of fertilizer box. Leave nuts and bolts
loose.
4. Remove four 3/8-by-1-inch hex flange bolts (8).
5. At right-hand end of box, bolt small-seeds box (9) to fertilizer
box using the 3/8-by-2-inch hex flange bolts (10) and box
spacer (5). Add reinforcing strap (11) supplied with small-
seeds kit to inside of fertilizer box.
6. On other end of box, bolt small-seeds box to mount (2) using
3/8-by-1-inch flange bolts (8) removed in step 4, and lock
washer and hex nut supplied in small-seeds kit.
7. On 15- and 20-foot drills, repeat steps to install right-hand
small-seeds box.
8. Tighten all nuts and bolts.
9. On 15-foot drills, check operation of flex coupler where box-
es meet in center of drill. Set both boxes at 50 percent open,
and make sure that the ears on couplers (12) are overlap-
ping by about 3/8 inch (9.5 cm).
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Figure 7
Small-Seeds Box, with Fertilizer