Great Plains YP4025F-1670 Operator Manual - Manual (Page 82)

78 YP4010HD/YP4025/F Table of Contents Index Great Plains Manufacturing, Inc.
401-571M Table of Contents Index 2014-09-08
Opener Disc Contact Region
Refer to Figure 95
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 in. (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 95 and Figure 96
1. Raise the planter and install lift cylinder locks.
2. For 25P Series, 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 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.
Side Gauge Wheel Adjustment
Note: Applies to 25P Series openers only.
Refer to Figure 97
Disc-to-wheel angle and clearance ideally has the wheel
just touching the disk when the wheel is raised to
planting depth (is up against the stop set by the “T”
handle. The goal is to have both disks and wheels turn
freely, but keep soil and trash from getting between them.
These two adjustments interact with each other.
Changing one requires at least checking the other.
In addition to changing the disk angle due to changing
depth or new field conditions, these two settings may
need attention over time as the disk and wheels wear
from normal use. This adjustment will also need to be
made if any opener components are replaced.
1
Figure 95
Opener Disc Contact Region
26127
2
1
Figure 96
Opener Disc Spacers
26128
6
5
3
4
7
8
2
3 4
5 6
5
7
8
5
6
Figure 97
Disk/Gauge Wheel Alignment
Incorrect Correct
Side Gauge
Wheel
Opener
Disks
Side Gauge
Wheel