Great Plains 3PYP Operator Manual - Manual (Page 73)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 69
2014-09-09 Table of Contents Index 401-312M
Row-Unit Opener Disk Adjustments
Opener Disc Contact Region
Refer to Figure 79
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.
The ideal spacing causes the blades to be in contact for
about one inch
. If you insert two pieces of paper
between the blades, they should slide to within zero
(touching) to 1.5 inch (3.8 cm) of each other. If zero, the
gap between the blades should not be significantly
greater than the thickness of two sheets of paper.
If the contact region is significantly larger or there is a
large gap, it needs to be adjusted by moving one or more
spacer washers.
Adjusting Disc Contact
Refer to Figure 79 and Figure 80
1. Raise the planter and install lift cylinder locks.
2. Remove the side gauge wheels on the row unit in
need of adjustment.
3. Remove the bolt retaining the opener disc on
one side. Carefully remove the disc. Do not lose the
hub components and spacer washers
, . Make
note of how many spacer washers are between
the disk and the nut bar .
Note: When the bolt is fully removed from the disk, a dust
cap or hold-down bracket will be loose.
4. To reduce the spacing between the discs (the normal
case), move one spacer washer from the inside
to
the outside of the disc. Do not discard any
spacers. They will be moved to the inside upon
eventual replacement of a completely worn out
blade.
5. Re-assemble and check disk contact.
1
Figure 79
Opener Disc Contact Region
26127
2
1
Figure 80
Opener Disc Spacers
26128
6
5
3
4
7
8
2
3 4
5 6
5
7
8
5
6