Yetter 10000 Magnum Series, Assembly Instructions Manual

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18
MAINTENANCE
BEARING ADJUSTMENT:
1. Raise the toolbar until the blade is clear of the ground. Place a safety stand
under the toolbar. Remove the blade. Remove the hub cap, cotter pin, slotted
nut, washer and spacer from the spindle shaft assembly.
2. Pull the coulter spindle shaft assembly from the hub. Remove bearing cones and
seal.
3. Wash the old grease from the hub, bearing cups, coulter spindle shaft, seal and
bearing cones. Inspect the condition of bearing cups, cones and seal. Replace if
necessary.
4. Apply #2 multi-purpose polyurea grease on each bearing. Make sure the space
around each roller is filled. Lubricate the bearing cups.
5. Position the bearing in the cup and install the seal. Lubricate the seal lips and
proceed with re-assembly of the removed parts including the blade. Blade bolt
torque is 90 to 96 ft/lbs.
6. Tighten the slotted nut to 10 to 15 ft/lbs. or until a definite drag is felt when the
blade is turned by hand. Back off the nut one slot position to line up the cotter
pin hole with a slot. Secure the nut with a new cotter pin.
KNIFE WEAR:
The lower portion of the scraper and tube are subject to wear during operation. The
rate of wear will depend on a variety of factors and in abrasive hard soil conditions the
wear will be more rapid.
NOTE: In certain areas, replacement knives should be kept in stock, replacing worn
knives as needed.
ADJUST KNIFE TO BLADE CONTACT on each opener so the blade will turn by
hand with slight resistance, but will not coast or freewheel. In loose soil the knife
adjustment is critical. If adjustment is not maintained, soil or residue may wedge
between knife and blade, resulting in the blade not turning. Because of blade run
out, rotate the blade one full revolution after adjustment. Re-adjust knife as
needed. Never strike the knife with a heavy object or damage may occur.
To adjust, use shims or adjust knife mounting out.