Great Plains CTA4000 HD Operator Manual - Manual (Page 52)

48 CTA4000HD Great Plains Manufacturing, Inc.
160-037M 2012-11-28
Disk Blade Adjustments
Opener disc angle and stagger is not adjustable, but
disc-to-disc spacing is, and may need attention as discs
experience normal wear. Spacers will need to be reset
when blades are replaced.
Refer to Figure 64
The ideal spacing causes the blades to be in contact for
about one inch. If you insert two pieces of paper between
the blades, the gap between them should be
0 to 1
3 ⁄
4
inch (0-4.4 cm).
If the contact region is significantly larger or smaller (or
there is no contact at all), it needs to be adjusted by
moving one or more spacer washers. If the contact
region varies with blade rotation, one or both blades is
likely bent and in need of replacement.
Adjusting Disc Contact
Sharp Object Hazard:
Row unit disk blades may be sharp. Use caution when
making adjustments in this area.
Refer to Figure 65
1.
Raise the implement and lock it up by moving the
Transport/Field handle to TRANS.
2. Remove the bolt retaining the opener disc on
one side. Carefully remove the disc , noting how
many spacers are outside the flange dust
cover and inside the disk. Do not lose the hub
components and spacers.
3. To reduce the spacing between the discs (the
normal case), move one spacer washer from the
inside to the outside of the flange dust cover.
4. Re-assemble and check disc contact.
Figure 64
Checking Disk Contact
26395
Figure 65
Adjusting Disk Spacers
26385
4
1
3
3
3
2
1
2
3
4