Great Plains 3S-4000F Operator Manual - Manual (Page 64)

60 3S-4000 Table of Contents Index Great Plains Manufacturing, Inc.
195-394M Table of Contents Index 2014-06-10
Opener Frame Clearance
Refer to Figure 67
When fully raised, top of opener mounts
should clear
bottom of drill frame tube by at least
1 ⁄
2
inch.
To adjust opener frames so all openers have the same
clearance, loosen jam nut
on opener lift cylinders and
turn adjustment nut. When openers are at the correct
height, retighten jam nut. Repeat at each opener lift
cylinder if necessary.
Disc 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 must be reset when
blades are replaced.
Refer to Figure 68
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 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:
Use caution when making adjustments in this area. Row unit
disc blades may be sharp.
Refer to Figure 69
1.
Raise the openers and lock them with the transport
pin.
2. Remove the bolt retaining the opener disc on one
side. Carefully remove the disc, noting how many
spacers
are outside the disc bearing and inside
the disc. 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.
Figure 67
Opener Frame Clearance
18853
1
2
1
2
Figure 68
Checking Disc Contact
26451
Figure 69
Adjusting Disc Spacers
26385
2
1
3
3
3
3
1
3 2