Replacing Belts - MTD 3BA Operator's Manual

Replacing Belts

NOTE: There are two belts on this snow thrower: auger
belt and drive belt. It is recommended that both belts be
replaced at the same time.
• Remove the spark plug wire from the spark plug
and ground it against the engine.
• Drain gasoline from the gas tank, or place a piece
of plastic sheet underneath the gas cap to prevent
gasoline leakage.
• Remove the self-tapping screw shown in Figure 13,
and press the plastic tabs to release the belt cover.
Pull the belt cover out from around the engine and
the chute assembly. Remove it away and save.
Figure 13
Auger Belt
• Slip the front auger belt off the engine pulley
pushing it down between the idler bracket and the
engine pulley. See Figure 14.
• Squeeze the auger control to release tension on
the auger belt; remove the belt.
• Replace with new belt after replacing the drive belt.
Follow instructions below to replace the drive belt:
Drive Belt
Figure 14
Drive Belt
NOTE: Replace the drive belt before reassembling the
new auger belt.
•
•
Belt Cover
Self-Tapping
Screw
•
•
Tab
•
•
•
•
Servicing Augers
The augers are secured to the spiral shaft with four
shear pins and cotter pins. If you hit a foreign object or
Engine Pulley
ice jam, the snow thrower is designed so that the pins
Auger Belt
may shear. Refer to Figure 12.
If the augers do not turn, check if the pins have
sheared. Replace, if needed, with proper shear pins.
refer to item 22 on page 18 for part number.
Auger Pulley
IMPORTANT:
standard pins or fasteners. Any damage to the auger
gearbox or other components, as a result of doing so,
will NOT be covered by your snow thrower's warranty.
Idler Bracket
13
Tip the snow thrower up and forward so that it rests
on the auger housing.
Remove the spring that connects the transmission
to a bolt on the engine frame. See Figure 15.
Drive Pulley Auger Pulley
NOTE: Transmission shown pushed forward
Figure 15
Pivot the transmission forward to release pressure
on the drive belt. Remove from transmission pulley.
Remove the drive belt from around the engine
pulley, and away from the unit.
Place the new drive belt into the groove on the
engine pulley. See Figure 14.
Tilt the transmission forward and position the drive
belt on the drive pulley.
Reconnect the spring to the bolt on the engine
frame and secure the transmission.
Reassemble the belt cover on the snow thrower.
NEVER replace the auger shear pins with
Spring
Drive Belt