Great Plains 3N-4025P Operator Manual - Manual (Page 77)

4/23/2010 196-286M
75 Maintenance and Lubrication
Opener Maintenance
15 Series Disk Spreaders and Scrapers
NOTE: It is normal for the blade spreader to have
some looseness in the holder and between the
blades. Some looseness is required for proper oper-
ation.
Refer to Figure 108
1. Remove side gauge wheels from arms to access
opener disks and scrapers.
2. With the unit raised, check the blade spreader
(1) for wear. Replace spreader if it is 1/2 inches
wide or narrower. To replace, remove disk blade
(3). Drive out the roll pins (2) and install a new
spreader.
3. When reinstalling disk blades, put two shims (4)
between bearing and shank on each blade.
Tighten bolts.
NOTE: You may need fewer washers on worn disks.
4. Check that outside disk scrapers (5) are formed
to disk blades to help remove any mud. Bend
and twist scrapers to fit blades as necessary. Af-
ter every 200 acres of operation, check outside
scrapers for proper adjustment and wear. Re-
place outside scrapers as necessary.
15 Series Side Wheels
Refer to Figure 109
1. Lift opener side wheel off the ground. Move tire
in and out to check for end play. Check for rough-
ness in bearing by rotating wheel. If the bearings
are rough, inspect and replace if necessary.
2. Check for the correct number of shims (1) be-
tween the side gauge wheel (2) and the wheel
arm (3). There must be at least one shim be-
tween the wheel bearing and arm. When in-
stalled, the wheel should turn freely and not hit
the arm at the curve. Do not add any more shims
than necessary.
3. Disassemble side-gauge-wheel arm from unit.
Remove bushing (4) from sleeve (5) and check
bushing for wear. Replace bushing if necessary.
4. When reinstalling side gauge wheels, align tab
on hex adjustment (6) with notch in bushing. Re-
place bolt and tighten.
5. To prevent plugging loosen clamp bolt (7) and
slide arm inward to take up gap between side
wheel and disk blade.
6. Adjust side gauge wheels. Refer to “Adjust-
ments,” page 36.
Figure 108
Disk Spreader and Scraper
17766
Figure 109
Opener Side Wheel
18452