MTD 3AA - Manual (Page 13)

13
Drive Pulley
Drive Belt
Spring
Before servicing,
repairing, or inspect-
ing, disengage all
controls 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. Always wear
safety glasses during
operation or while
performing any adjust-
ments or repairs.
WARNING
6
Maintenance
& Service
Replacing Belts
NOTE: There are two belts on this snow thrower: an
auger belt and drive belt. It is recommended that both
belts be replaced at the same time.
1. Remove the spark plug wire from spark plug and ground
it against the engine to prevent accidental starting.
2. Drain gasoline from the gas tank, or place a piece
of plastic sheet underneath the gas cap to prevent
gasoline leakage.
WARNING: Perform belt maintenance outdoors as
some gas may possibly leak from the carburetor even
though you placed a sheet of plastic underneath the
gas cap to prevent the gas cap from leaking.
3. Remove the self-tapping screw shown in Figure
11, and press the plastic tabs to release the belt
cover. Pull the belt cover up and out from around the
engine and chute assembly. Set it aside and save.
Auger Belt
1. Slip the front auger belt off of the engine pulley pushing
it forward and rolling in off of the pulley. See Figure 12.
2. Squeeze the auger control handle to release the
auger brake, which is the tab that holds the belt onto
the auger pulley. Remove the belt.
3. Replace with new belt after replacing the drive belt.
Drive Belt
NOTE: Replace the drive belt before reassembling the
new auger belt.
1. Tip the snow thrower up and forward so that it rests
on the auger housing.
IMPORTANT: Remember, gas could leak from the
carburator at this point, the gas cap should have been
covered with plastic as previously instructed.
2. Remove the spring that connects the transmission to
a bolt on the engine frame. See Figure 13.
NOTE: It may be easier to first remove the flange lock
nut, then use needle-nosed pliers to firmly grip spring
and remove from bolt.
3. Pivot the transmission forward to release pressure on
the drive belt. Remove belt from transmission pulley.
4. Remove the drive belt from around the engine pulley,
and away from the unit.
5. Place the new drive belt into the groove on the
engine pulley. See Figure 12.
6. Tilt the transmission forward and position the drive
belt onto the transmission pulley.
7. Reconnect the spring to the bolt on the engine frame and
secure the transmission. Reinstall the flange lock nut.
8. Install new auger belt.
9. Reassemble the belt cover on the snow thrower.
Figure 12
Figure 11
Plastic Tab
Figure 13
Flange Lock Nut
Drive
Belt
Engine
Pulley
Auger Belt
Auger
Pulley
Idler
Bracket