MTD 642E - Manual (Page 16)

16
Both Wheels Driving
• Rotate wheel assembly to align hole in the hub with
the inner hole on the axle shaft. Insert klick pin in
the hole. Outer axle shaft hole should be visible.
IMPORTANT: NEVER operate the snow thrower with the
click pin inserted through both the RIM and the
OUTSIDE HOLE in the axle. Doing so can result in
serious damage to the drive system.
SECTION 7: MAINTAINING YOUR SNOW THROWER
WARNING: Before lubricating, repair-
ing, or inspecting, disengage all clutch
levers and stop engine. Wait until all mov-
ing parts have come to a complete stop.
Disconnect spark plug wire and ground it
against the engine to prevent unintended
starting.
Lubrication
Engine
Refer to the separate engine manual packed with your
unit for all engine lubrication instructions.
WARNING: If any adjustments need to
be made to the engine while the engine is
running (e.g. carburetor), keep clear of all
moving parts. Be careful of muffler, engine
and other surrounding heated surfaces.
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.
IMPORTANT: Keep all grease and oil off the friction
wheel and drive plate.
Wheels
• Oil or spray lubricant into bearings at wheels at
least once a season. Pull klick pin, remove wheels,
clean and coat axles with a multipurpose
automotive grease. See Figure 21.
Figure 21
Chute Directional Control
• The worm gear on the chute directional control
should be greased with multipurpose automotive
grease.
Auger Shaft
• At least once a season, remove shear bolts on
auger shaft. Oil or spray lubricant inside shaft and
lubricate the auger bearings. See Figure 22.
Figure 22
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 lubricant. Avoid
getting oil on rubber friction wheel and aluminum drive
plate. See Figure 23.
Figure 23
Gear Case
The worm gear case has been filled with grease at the
factory. If disassembled for any reason, lubricate with 2
ounces of shell grease, part number 737-0168.
IMPORTANT: Do not overfill the gear case. Damage to
the seals could result. Be sure the vent plug is free of
grease in order to relieve pressure.
Klick Pin
Axle
Vent Plug
Plastic
Bearing Plastic
Bearing
Shear Bolts
Chain Shift Lever
Gear Shaft
Avoid oil on
friction wheel and
drive plate