Great Plains 606NT Operator Manual - Manual (Page 39)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 35
2014-02-10 Table of Contents Index 151-061M
Disc Blade Adjustments
Raise drill and block it up or lock it up.
Opener Disc Spacing
Sharp Object Hazard:
Be careful working around and handling disc blades. Wear
gloves. Edges of both new and well-worn blades can be sharp.
Opener disc angle and stagger is not adjustable, but
disc-to-disc spacing is, and may need attention as discs
experience normal wear. Spacers must be reset when
blades are replaced.
Refer to Figure 36
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 1.75 in. (0 to 4.4 cm)
If the blades do not touch, they should at least be close
enough so that a business card encounters some friction
when passing between them.
If the contact region is significantly larger or the gap too
wide, 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. If removing all spacers cannot bring the
blades into contact, they are worn out and need
replacing.
Adjusting Disc Contact
Refer to Figure 37
1.
Remove the bolt retaining the opener disc on one
side. Carefully remove the disc, noting how many
spacers
are outside the disc and inside the disc.
Do not lose the hub components and dust cap .
Note: It is not necessary to remove the hub flange or
bearing for this adjustment.
2. To reduce the spacing between the discs (the normal
case), move one spacer washer
from the inside to
the outside of the disc. It may be necessary to
loosen the scraper (page 36) to reduce disc-to-disc
spacing.
3. Re-assemble and check disc contact.
4. Re-adjust scraper.
Figure 36
Checking Disc Contact
26451
1
2
3
2
Figure 37
Adjusting Disc Spacers
26385
1
2
3
1