Great Plains 3N-4025P Operator Manual - Manual (Page 79)

4/23/2010 196-286M
77 Maintenance and Lubrication
25 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 operation.
Refer to Figure 112
1.
Remove side gauge wheels from arms to access open-
er 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 nar-
rower. 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) be-
tween 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 scrap-
ers to fit blades as necessary. After every 200 acres of
operation, check outside scrapers for proper adjust-
ment and wear. Replace outside scrapers as neces-
sary.
25 Series Opener Side Wheels
Refer to Figure 113
1. Lift opener side wheel off the ground. Move tire in and
out to check for end play. Check for roughness in bear-
ing by rotating wheel. If the bearings are rough, inspect
and replace if necessary.
2. The side wheels are preset at the factory, however be-
cause of normal wear it may become necessary to
make adjustments so the wheel remains close to the
disk. To prevent plugging loosen clamp bolt (7) and slide
arm inward to take up gap between side wheel and disk
blade. If more adjustment is needed go to step 3.
3. Remove bolt (10) and wheel (2). Remove shims (1) from
the inside of the wheel (2) and place them on the out-
side of the wheel. Always place the shims removed from
the inside to the outside. When installed, the wheel
should turn freely and not hit the arm at the curve. Do
not add any more shims than necessary.
4. Disassemble side gauge wheel arm (3) from unit. Re-
move bushing (4) from sleeve (5) and check bushing for
wear. Replace bushing if necessary.
5. When reinstalling side gauge wheels, align tab on hex
adjustment (6) with notch in bushing. Replace bolt and
tighten.
6. Adjust side gauge wheels. Refer to “Adjustments,” page
36.
Disk edges are sharp. Be careful when working in this area.
21893
21894
Figure 112
Spreaders and Scrapers
Figure 113
Side Wheels