Great Plains Mfg., Inc.
Installation Instructions
20’ No-Till Air Drill
Small Seeds Option
Used with:
• NTA 2000D
• NTA 2000 (export model)
General Information
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!
These instructions explain how to install the Small
Seeds Attachment Option. The small seeds attachment mounts behind the main drill box and
allows you to evenly seed very fine seeds.
These instructions apply to:
148-667A NTA2000 Small Seeds Package
Manual Update
Refer to the NTA 2000 operator’s manual for detailed information on safely operating, adjusting,
troubleshooting and maintaining the NTA 2000.
Refer to the parts manual for part identification.
148-632M Operator’s Manual
148-632P Parts Manual
148-561M Operator’s Manual
148-561P Parts Manual
Before You Start
Page 13 is a detailed listing of parts included in
the Small Seeds Option package. Use this list to
inventory parts received.
Tools Required
• Basic hand tools
Definitions
The following terms are used throughout this
manual.
Right-hand and left-hand as used in this manual
are determined by facing the direction the machine will travel while in use unless otherwise
stated.
© Copyright 2002 Printed
20210
10/21/2003
148-679M
Small Seeds Option
2
Assembly Instructions
Refer to Figure 1
1. Remove the bolts which hold the short handrail brackets (1) and long handrail brackets (2)
and discard brackets (1) and (2).
2. Remove the bolts which hold the platform
handrails (3) on the upper platform and discard handrails (3).
Note: Save bolts, nuts and washers for installation
of new handrails.
Great Plains Mfg., Inc.
Refer to Figure 2
3. On the rear of the main seed box measure 14
29/32" (37.90 cm) from the right-hand side of
the box and up from the mounting surface
12 5/8" (33.53 cm) and mark. From this mark
measure to the left 82 15/16" (210.68 cm) and
up from the mounting surface of the box
12 5/8" (33.53 cm) and mark.
4. Drill a 13/32" (1.03 cm) hole at each of the
spots marked in step 3.
5. Align the center hole on each end of the small
seeds box with the holes drilled in step 4. Secure small seeds box with 3/8" bolts, 3/8" lock
washers and 3/8" nuts.
6. Use the small seeds box as a template and
drill the remaining four holes and secure box
with 3/8" bolts, 3/8" lock washers and 3/8"
nuts.
20199
Figure 1
Removing Handrail
Figure 2
Marking the Holes
20203
148-679M 5/9/2007
Great Plains Mfg., Inc.
Refer to Figure 3
7. Remove the plastic guard from the cup drive
assembly (1) and mount the cup drive assembly (1) to the right-hand side of the small seeds
box (2). Align the sprockets with the two shafts.
Secure drive (1) in place with three 3/8 x 3/4"
bolts and 3/8" flange lock nuts. Tighten bolts
and replace plastic guard.
8. Slide a 5/16" nut clip (3) over the hole in the
bracket above the sprockets in drive assembly
(1). Attach the chain guard (4) to the bracket
using a 5/16" x 3/4" bolt and 5/16" lock washer
and tighten bolt.
9. Remove the roll pin from the end of the calibra-
tion crank shaft. Keep roll pin for later use.
10. Align the hole in the drive assembly (9) with the
hole in the calibration crank shaft. Position the
set screw in the drive assembly with the flat
area on the shaft and reinstall the roll pin removed in step 9 and tighten set screw against
shaft.
20204
Installation Instructions
Figure 3
Drive Assembly
3
Refer to Figure 4
11. Remove plastic guard from lower drive bracket
(6). Attach the drive angle bracket (7) using the
smaller set of holes to the back side of the lower drive bracket (6). Use two 3/8" x 1" bolts, four
3/8" flat washers and two 3/8" nuts. Snug bolts
and nuts leaving them loose enough to allow
the bracket to slide.
Refer to Figure 5
Note: Figure five shows the lower drive assembly in
the mounted position.
Refer back to Figure 3
12. Remove the two M8 metric bolts located in the
top of the variator gearbox mount. Place spacer (8) over holes in the top of the variator gearbox mount and place the lower drive bracket (6)
on top of spacer (8). Align sprocket of the lower
drive bracket (6) with the sprocket of the drive
assembly (9). Secure lower drive bracket with
two M8 x 1.25 x 25 metric bolts (12) and tighten
bolts.
20214
Figure 4
Lower Drive Assembly (back view)
13. Slide the drive angle bracket (7) towards the
drill until it makes contact. Make sure the
sprockets are aligned and mark the position of
the two larger holes. Remove the two metric
bolts and remove the lower drive bracket (6).
14. Drill two 17/32" holes at the marks made in the
previous step.
5/9/2007
21764
Figure 5
Lower Drive Assembly (mounted)
148-679M
Small Seeds Option
4
15. Attach the lower drive bracket (6) using the
two metric bolts and two 1/2" x 1 3/4" bolts,
1/2" flat washers, 1/2" lock washers and 1/2"
nuts. Align sprockets and tighten all bolts.
Refer to Figure 6
16. Slide four 5/16" nut clips (3) over the four
holes in the outer drive shield (5). Attach the
outer drive shield (5) to the back side of the
lower drive bracket (6) and the back side of
the cup drive assembly (1) using 3/8" x 3/4"
bolts, 3/8" flat washers and 3/8" flange lock
nuts. Tighten bolts.
17. Remove guard (11) from the cup drive assembly (1).
18. Install 166 pitch chain around sprockets and
through the chain idler. Tighten the chain idler
and install the inner drive shield (10). Hold
shield in place with four 5/16" x 3/4" bolts and
four 5/16" lock washers. Replace guard (11)
on the cup drive assembly (1).
Great Plains Mfg., Inc.
20204
Figure 6
Drive Assembly
19. Install chain on lower drive bracket (6) and replace plastic guard.
Note: Use illustration at right to aid in chain routing.
Refer to Figure 7
20. Install clockwise rotation arrow decal (a) on
the Variator gearbox to replace the one covered by the lower drive bracket.
20219
a
Lower Drive
Bracket
20215
Figure 7
Clockwise Rotation Arrow
148-679M 5/9/2007
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