Great Plains Mfg., Inc.
Update Kit
Frame-Mounted Coulters
Used with:
• Model year 2004 and earlier coulters
General Information
These instructions explain how to install the Update Kit.
This upgrade includes several components that improve
the reliability of and consistency of results with framemounted coulters:
• New casting
• New spring guide tube
• Replacement grease zerk
These instructions apply to:
Option Package Part Number
2005 COULTER CASTING UPDATE 249-136A
Installation Instructions 1
Before You Start
Each kit converts one coulter.
For each kit, inventory the contents per the “Parts List”
on page 6.
Review the instructions, to make sure the steps are
understood and what tools are expected.
Have the following items at hand:
• Original or updated Parts Manual for your implement
• basic hand tools
If necessary, move the implement to a dry well-lighted
location suitable for disassembly.
1. Raise and unfold the implement and, if equipped,
install lift cylinder locks. Otherwise secure it so that it
cannot lower during the work.
2. Secure the tractor.
Figure 1
Update Kit Components
26097
Notations and Conventions
“Left” and “Right” are facing in the direction of machine
travel.
1
callouts identify components in the currently
referenced Figure or Figures
11 14
to callouts reference new parts from the list on
page 6
51 71
to callouts reference existing parts. The
descriptions match those in your Parts manual.
Note on Disassembly
If access clearance permits, this update may be performed with the coulter mounted on the tool bar. These
instructions assume this is possible.
On some planters and drills, and some row spacings, it
may be necessary to first dismount the coulters before
performing the update.
©Copyright 2007 Printed 02/28/2007 249-137M
2 Update Kit
Dismount Coulter
Remove Coulter Blade
Refer to Figure 2
To reduce sharp object hazard, and to ease removal of
the swing arm, first remove the coulter blade.
3. Remove and save four each:
61
NUT HEX 1/2-13 PLT
65
WASHER LOCK SPRING 1/2 PLT
60
RHSNB 1/2-13X1 1/4 GR5
4. Remove and save the coulter blade .
1
Great Plains Mfg., Inc.
61
65
Remove Spring
Refer to Figure 3
Because parts to be removed later are under tension
from the spring, remove it at this time.
5. Remove and save the outer jam nut:
62
NUT HEX JAM 3/4-10 PLT
6. Carefully remove and save the inner jam nut,
washer and coil spring:
62
NUT HEX JAM 3/4-10 PLT
54
COULTER SPRING WASHER
55
SPRING 2.25 O.D. X .5 COIL
7. Remove the old spring rod sleeve and bushing.
These are not re-used:
57
SPRING ROD SLEEVE 1 1/8 OD
69
BUSHING COULTER CASTING
60
Figure 2
Remove Coulter Blade
69
57
55
Figure 3
Remove Spring
1
26098
54
62
62
26098
249-137M 02/28/2007
Great Plains Mfg., Inc.
Remove Coulter Swing Arm
Refer to Figure 4
8. Remove and save one each:
68
PIN COTTER 1/4 X 2 PLT
67
WASHER FLAT 1 1/4 SAE PLT
9. Remove and save one each:
62
NUT HEX JAM 3/4-10 PLT
64
NUT HEX FLANGE LOCK 3/4-10 PLT
70
SWING ARM BUSHING
52
FERT COULTER SWING ARM
10. If the existing coulter bushing:
71
BUSHING 1.50ODX1.25IDX2.94
happens to come loose, it is not saved or reused.
62
52
Installation Instructions 3
67
68
71
64
70
Dismount Casting
Refer to Figure 5
11. Remove and save two each:
63
NUT HEX 7/8-9 PLT
66
WASHER LOCK SPRING 7/8 PLT
59
HHCS 7/8-9X2 3/4 GR5
12. If any offset mount plate is present:
51
OFFSET COULTER MOUNT PLATE
note its orientation for re-installation.
13. Remove the old casting:
53
MACH.MOUNT CASTING COULTER
The old casting is not saved or reused, but it contains a part that is reused.
14. Remove and save the spring rod from the casting:
56
COULTER SPRING ROD WLDMT
15. It may be necessary to remove the old zerk:
58
GREASE ADAPT 1/4-28M X 1/4 TB
in order to remove the rod. The zerk is not saved or
reused.
51
Figure 4
Remove Swing Arm
56
59
53
66
63
26098
66
63
58
Figure 5
Remove Old Casting
02/28/2007 249-137M
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4 Update Kit
Prepare New Casting
Refer to Figure 6
16. Select one each new:
12
249-050S CLTR CASTING ASSY
13
800-001C GREASE ZERK STRAIGHT 1/4-28
and one saved:
56
COULTER SPRING ROD WLDMT
Great Plains Mfg., Inc.
56
17. Insert the rod in the casting and install the
grease zerk .
56 12
13
Mount New Casting
Refer to Figure 7
18. Select two each saved:
63
NUT HEX 7/8-9 PLT
66
WASHER LOCK SPRING 7/8 PLT
59
HHCS 7/8-9X2 3/4 GR5
and any saved:
51
OFFSET COULTER MOUNT PLATE
Figure 6
Prepare New Casting
59
1
13
12
26099
66
63
19. Attach the new casting assembly to the spring
151
bar , re-mounting any removed plate in its
original orientation.
12
12
51
66
63
Figure 7
Mount New Casting
249-137M 02/28/2007
26099
Great Plains Mfg., Inc.
Re-Mount Swing Arm
Refer to Figure 8
20. Select one each saved:
52
FERT COULTER SWING ARM
70
SWING ARM BUSHING
64
NUT HEX FLANGE LOCK 3/4-10 PLT
62
NUT HEX JAM 3/4-10 PLT
68
PIN COTTER 1/4 X 2 PLT
67
WASHER FLAT 1 1/4 SAE PLT
Installation Instructions 5
56
67
68
21. Insert the swing arm into the new casting .
22. Secure the pivot with the washer and cotter pin
68
.
23. Insert the swing arm bushing into the arm .
Secure the spring rod to the swing arm with
the flange nut and jam nut .
52 12
67
70 52
56 52
64 62
Install New Spring Guide
Refer to Figure 9
24. Select one new:
14
805-331C COULTER SPRING GUIDE TUBE
one each saved:
54
COULTER SPRING WASHER
55
SPRING 2.25 O.D. X .5 COIL
and two saved:
62
NUT HEX JAM 3/4-10 PLT
25. Place the new guide over the spring rod and
make sure it is fully seated in the new casting
26. Place the saved spring over the spring rod ,
followed by the saved washer .
27. Thread on one of the jam nuts . Tighten it until
the spring length is 97⁄8in to 10in.
14 56
55 56
54
62
62
64
70
52
Figure 8
Re-Mount Swing Arm
56
12
7
9
⁄
in
8
to 10in
12
26099
14
55
54
62
28. Thread on the second jam nut , and tighten
(without allowing the first to make additional turns).
02/28/2007 249-137M
62
62
Figure 9
Install New Spring Guide
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6 Update Kit
Re-Install Coulter Blade
Refer to Figure 10
29. Select four each saved:
1
coulter blade
61
NUT HEX 1/2-13 PLT
65
WASHER LOCK SPRING 1/2 PLT
60
RHSNB 1/2-13X1 1/4 GR5
Great Plains Mfg., Inc.
65
61
30. Place the blade on the hub and secure with the
1
⁄2-13 bolts , lock washers and nuts .
1
60 65 61
Reference Information
Abbreviations
GR5 Grade 5
HHCS Hex Head Cap Screw (Bolt)
RHSNB Round Head Shank Neck Bolt
MNT Mount
PLT Plated
60
Figure 10
Re-install Blade
Torque Values
Fastener/Fitting N-m Ft-Lbs
1
⁄4-28
1
⁄2-13 GR5
3
⁄4-10
7
⁄8-9
13 10
105 76
360 265
858 430
1
26099
Parts List
New Parts Included in the 249-136A Update Kit:
Callout Quantity Part No. Part Description
11
12
13
14
249-137M 02/28/2007
1 249-137M
1 249-050S
1 800-001C
1 805-331C
This manual
CLTR CASTING ASSY
GREASE ZERK STRAIGHT 1/4-28
COULTER SPRING GUIDE TUBE
Great Plains Manufacturing, Inc.
Corporate Office: PO Box 5060
Salina, KS 67402-5060 USA
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