Yetter 2000 Series Vertical Tillage Tool (V.T.T.) - Manual (Page 33)

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MAINTENANCE
WARNING: Never clean, lubricate or adjust a machine that is in motion. Failure to heed may
result in serious personal injury or death.
COULTER BLADE WEAR
Blade wear can affect performance in loose trash conditions. Depth control and plugging problems can
result. It may be necessary to replace blades.
WARNING: If required to service unit in raised position, be sure to close the hydraulic
valves. Failure to heed may result in serious personal injury or death.
DANGER: Inspect and replace worn or frayed hydraulic hose. Keep all connections tight.
Escaping hydraulic fluid under pressure can have sufficient force to penetrate the skin and
cause serious personal injury. Fluid escaping from a small hole can be almost invisible. Use a
piece of cardboard or wood rather than the hands to search for suspected leaks. Failure to heed
may result in serious personal injury or death.
LUBRICATION
WARNING: Never clean, lubricate or adjust a machine that is in motion. Failure to heed may
result in serious personal injury or death.
Lubricate with general-purpose grease
•
To ensure longevity and reliability of the V.T.T.¥ Coulter , each coulter assembly has (2)
grease fittings. Grease the pivots weekly. Grease the hub four times per season. Repack the
hubs once per season.
• There is a grease fitting on each end of the upper and lower parallel arms. Grease every 10 hours.
• Transport Wheel Hubs require repacking once per season.
BEARING ADJUSTMENT:
1. Raise the toolbar until the blade is clear of the ground. Place a safety stand under the toolbar.
Remove the hubcap, cotter pin, slotted nut and washer from the hub assembly. Remove the blade
from the hub assembly.
2. Remove bearing cones and seals from hub.
3. Wash the old grease from the hub, bearing cups, spindle spacers, seals and bearing cones.
Inspect the condition of the bearing cups, cones and seals. 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.
Tighten the slotted nut to 15 ft. lbs. or until a definite drag is felt when the hub is turned by hand. Tighten the
nut one-slot position to line up the cotter pin hole with a slot. Secure the nut with a new cotter pin, replace
hubcap.