Servicing Your Lawn Mower - MTD YARD-MAN 449 Operator's Manual

Lubrication (See Figure 12)
Wheels
• Lubricate the wheels and bearings, if so equipped,
at least once a season with light oil or engine oil.
Also, if the wheels are removed for any reason,
lubricate the surface of the pivot arm axle and the
inner surface of the wheel with light oil.
Chute Deflector & Rear Discharge Door
• Lubricate the torsion springs and the pivot point on
each end of the rear discharge door using a light oil.
This will prevent rusting.
Engine
• Follow the engine manual instructions and
recommended schedule for lubricating engine.
Transmission
• The transmission is pre-lubricated and sealed at
the factory and does not require lubrication.
Pivot Points
• Lubricate the pivot points on the blade control
handle, lower bail handle and the cutting height
adjustment lever at least once a season with light
oil. The blade control handle and the lower bail
handle must operate freely in both directions. The
cutting height adjustment levers should be able to
move easily.
SECTION 7: SERVICING YOUR LAWN MOWER
Blade Care
Periodically inspect the blade adapter assembly for
cracks, especially if you strike a foreign object. Replace
when necessary.
WARNING:
When removing the cutting
blade for sharpening or replacement, protect
hands by using heavy gloves or a thick rag to
grasp the cutting blade.
• Disconnect spark plug wire from spark plug.
• Turn mower on its side making sure that the air filter
and the carburetor are up.
To Remove Blade
• Remove the bolt and the blade bell support that
hold the blade and blade adapter assembly to the
engine crankshaft. See Figure 13.
• Remove the blade and the adapter assembly from
the crankshaft.
Lubricate
Blade
Adapter
Assembly
Blade Bell
Support
To Replace Blade:
• Before reinstalling the blade and adapter assembly
to the unit, lubricate the engine crankshaft and the
inner surface of the adapter with light oil.
13
Lubricate
Follow engine manual
for lubrication
Lubricate
Figure 12
Blade
Hex Bolt
Figure 13