Great Plains CTA4000 Operator Manual - Manual (Page 46)

42 CTA4000
160-269M-A 08/03/2010
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 51
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 1.75in
(0-4.4cm).
If the contact region is significantly larger or smaller (or
there is no contact at all), it needs to be adjusted by mov-
ing 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
Row unit disk blades may be sharp. Use caution when making
adjustments in this area.
Refer to Figure 52
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 disk and inside the disk. Do
not lose the hub components and spacer washers.
3. To reduce the spacing between the discs (the normal
case), move one spacer washer from the inside to
the outside of the disc.
4. Re-assemble and check disc contact.
Disk Scraper Adjustments
To keep opener disks turning freely, dirt scrapers are
mounted between disks to clean as disks rotate. Stan-
dard 00 Series row units include a double-disk slotted
scraper.
Refer to Figure 53
As field conditions vary, scrapers may need to be
adjusted. In damp conditions, lower scrapers. If openers
are not turning freely, raise scrapers. To adjust, loosen
bolt and move scraper as needed.
Row unit disk blades may be sharp. Use caution when making
adjustments in this area.
Figure 51
Checking Disk Contact
26451
Figure 52
Adjusting Disk Spacers
26385
2
1
3
3
3
3
Figure 53
Opener Disk Scraper
16163