Assembly Instructions User Manual

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Installation Instructions

Great Plains Mfg., Inc.

Used with:

•

123-835M

12, 15 and 20 Series Drill

Small Seeds Option

1200, 1210 and 1220 Drills

1500, 1510 and 1520 Drills

2000, 2010 and 2020 Drills

General Information

These instructions explain how to install the small-seeds attach-

ment. The small-seeds attachment mounts behind the main drill

box and allows you to evenly seed very ﬁne seeds.

Manual Update

Refer to the drill operator’s manual for detailed information on

safely operating, adjusting, troubleshooting and maintaining the

small-seeds attachment. Refer to the parts manual for part iden-

tiﬁcation.

• 12, 15 and 20 Series Drill Operator’s Manual . . 118-389M-A

• 12, 15 and 20 Series Drill Parts Manual. . . . . . . . . 118-389P

Definitions

Right and left as used in this manual are determined by facing

the direction the drill will travel in the ﬁeld.

Assembly Instructions

If drill is outﬁtted with optional fertilizer box, refer to Small Seeds

with Fertilizer, page 4, for assembly instructions. If drill does not

have an optional fertilizer box, follow these instructions:

Small Seeds without Fertilizer

Refer to Figure 1.

1. Remove handles (1) from back side of main drill box. Keep

bolts, nuts and handles for later use. Remove and save 1/2-

by-1-inch bolt (2) joining main drill box to drill frame.

2. Install left-hand mount for small-seeds box (3) using 1/2-by-

1-inch bolt (2) in new hole and 1/2-by-1 1/4-inch bolt (4) sup-

plied in small-seeds kit. Fasten top of mount (3) to rear of

main drill box using handle holes. Use a new 1/2-by-1 1/4-

inch bolt (5) from small-seeds kit. Reuse 1/2-inch hex-ﬂange

lock nut (6) on inside of main drill box. Leave mount nuts and

bolts loose.

3. Remove four 3/8-by-1-inch hex-ﬂange bolts (7). Save these

bolts and nut for reuse in the same holes.

4. Bolt small-seeds box (8) to main drill box. At right-hand end

of box, use 3/8-by-1-inch bolts (7) removed in step 3. Also

add reinforcement strap (9) supplied in small-seeds kit to in-

side of main drill box. At other end of box, bolt small-seeds

box to mount (3) using 3/8-by-1-inch hex-ﬂange bolts, lock

washer, and nuts (10) supplied in small-seeds kit.

5. On 15- and 20-foot drills, repeat steps to install right-hand

small-seeds box.

6. Tighten all hardware. If you are installing a15-foot box,

check operation of ﬂex coupler where main drill box meet.

Set both boxes at 50 percent open, and make sure that the

ears on couplers (11) are overlapping by about 3/8 inch (9.5

mm).

Figure 1

Small-Seeds-Box, No Fertilizer

When you see this symbol, the subsequent instructions and

warnings are serious - follow without exception. Your life and

the lives of others depend on it!

12209

Summary of content (5 pages)

PAGE 1
Great Plains Mfg., Inc. Installation Instructions 12, 15 and 20 Series Drill Small Seeds Option Used with: • 1200, 1210 and 1220 Drills • 1500, 1510 and 1520 Drills • 2000, 2010 and 2020 Drills ! When you see this symbol, the subsequent instructions and warnings are serious - follow without exception. Your life and the lives of others depend on it! General Information These instructions explain how to install the small-seeds attachment.
PAGE 2
Great Plains Mfg., Inc. Assembly Figure 2 Front Drive, No Fertilizer 12210 Refer to Figure 2. 1. Working at front, left-hand side of drill, remove two 1/2-by-1inch bolts (12) that join main drill box to drill frame. Install left-hand bearing bracket (13) using 1/2-by-1 1/2-inch bolts and flat washers from small-seeds kit. Leave these bolts loose. 2. Relieve tension on chain (14) that runs from gearbox-output sprocket to seed jackshaft.
PAGE 3
Great Plains Mfg., Inc. Assembly Refer to Figure 3. 7. Working at rear of drill, install two flush-mount bearings (32) on mount bracket using 5/16-by-1-inch carriage bolts (33), nuts and lock washers supplied with small-seeds kit. Install 3/4-inch round jackshaft (34) in bearings and slip two 17tooth sprockets (35 and 36) over shaft as shown. 8. Fasten idler arm (37) to mount bracket using 1/2-by-1 1/4inch carriage bolt (38). Place 12-tooth plastic idler sprocket (39) on idler.
PAGE 4
Great Plains Mfg., Inc. Assembly Small Seeds with Fertilizer Refer to Figure 6. 1. Working on back, left-hand side of drill, loosen round fertilizer 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. Refer to Figure 7. 2. Remove handles (1) from back side of fertilizer box. Save bolts, nuts and handles. 3.
PAGE 5
Great Plains Mfg., Inc. Assembly Refer to Figure 8. 10. Working on back, left-hand side of drill, install two flushmounted 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).