Maintaining Your Snow Thrower - MTD 640 Operator's Manual

SECTION 6: MAINTAINING YOUR SNOW THROWER
WARNING:
or inspecting, disengage all clutch levers
and stop engine. Wait until all moving parts
have come to a complete stop. Disconnect
spark plug wire and ground it against the
engine to prevent unintended starting.
Lubrication
Chute Directional Control
• The worm gear on the chute directional control
should be greased with multipurpose automotive
grease.
Wheels
• Oil or spray lubricant into bearings at least once a
season. Pull the klick pins and remove wheels,
clean and coat axles with a multipurpose
automotive grease. See Figure 12.
Figure 12
Gear Shaft
• Lubricate the gear shaft with a good all-weather
multi-purpose light grease at least once a season
or after every 25 hours of operation.
Keep all grease and oil off friction wheel
IMPORTANT:
and drive plate.
Drive and Shifting Mechanism
• Remove rear cover. Oil any chains, sprockets,
gears, bearings, shafts, and shifting mechanism
at least once a season. Use engine oil or a spray
Before servicing, repairing,
Klick Pin
Axle
lubricant. Avoid getting oil on rubber friction
wheel and aluminum drive plate.
Gear Case
• The worm gear case has been filled with grease
at the factory. If disassembled for repairs,
lubricate with 2 ounces of shell grease, part no.
737-0168.
Do not overfill the gear case. Damage to
IMPORTANT:
the seals could result. Be sure the vent plug is free of
grease in order to relieve pressure.
Engine
• Refer to the engine manual for maintenance
procedures and instructions.
WARNING:
in the engine manual for draining oil, be
sure to protect frame to avoid oil dripping
onto transmission parts.
Follow the precautions listed under "Stopping Engine"
to prevent possible freeze-up.
Auger Shaft
• At least once a season, remove shear bolts on
auger shaft. Oil or spray lubricant inside shaft.
Also lubricate the auger bearings at least once a
season. See Figure 13.
Shear Bolts
Bearings
11
When following instructions
Bearings
Figure 13