Great Plains 3S-5000HDF Operator Manual - Manual (Page 55)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 51
2012-08-14 Table of Contents Index 195-325M
3. After adjusting, lock flange nut in place with jam nut.
The length of the spring is factory-set to:
13
5 ⁄
16
in. (33.8 cm).
The reference points for this length are the
center of the upper/front clevis pin
and
the base of the lower/rear spring stop cup .
The factory preset length is recommended for
conventional till and min-till conditions. Shorten it for
rows in tire tracks or more difficult min-till conditions. The
minimum recommended length is:
12
5 ⁄
16
in. (31.3 cm).
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 49
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.
Figure 48
00 Series Spring Length
26454
3
2 4 2
3
4
Figure 49
Checking Disc Contact
26451