Yetter Avenger 30 Coulter - Manual (Page 20)

20
OPERATION 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 lithium 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 knife and tube are subject to wear during operation. The rate of wear will
depend on a variety of factors and in abrasive soil conditions the wear will be more rapid.
NOTE: In certain areas, replacement knives should be kept in stock, replacing worn knives as
needed.