MTD 31AE640F352 - Manual (Page 14)

14
Figure 15
Drive Belt
• Follow steps 1 through 4 of previous instructions.
• Pull idler pulley up, and lift belt off engine pulley and
friction wheel disc. See Figure 14.
• Back out the stop bolt until the support bracket rests
on the auger pulley. See Figure 16.
• Slip belt between friction wheel and friction wheel
disc. Remove and replace belt. Reassemble
following the instructions in reverse order.
NOTE: The support bracket must rest on the stop bolt
after the new belt has been assembled. See Figure 25.
Figure 16
Changing Friction Wheel Rubber
The rubber on the friction wheel is subject to wear and
should be checked after 25 hours of operation, and
periodically thereafter. Replace the friction wheel
rubber if any signs of wear or cracking are found.
• Drain the gasoline from the snow thrower, or place
a piece of plastic under the gas cap.
• Tip the snow thrower up and forward, so that it rests
on the housing. See Figure 17.
Figure 17
• Remove the six self-tapping screws from the frame
cover underneath the snow thrower.
• Remove the klick pins which secure the wheels,
and remove the wheels from the axle.
• Using a wrench to hold the shaft, loosen, but do not
completely remove, the hex nut and bell washer on
left end of gear shaft. See Figure 17.
• Lightly tap the hex nut to dislodge the ball bearing
from the right side of frame. Remove the hex nut
and bell washer from left end of shaft.
• Slide the gear shaft to the right and slide the friction
wheel assembly from the shaft.
• Remove the four screws from the friction wheel
assembly. Remove the friction wheel rubber from
between the plates. See Figure 18.
Figure 18
• Reassemble new friction wheel rubber to the
friction wheel assembly, tightening the four screws
in rotation and with equal force.
• Position the friction wheel assembly up onto the pin
of the shift rod assembly, and slide the shaft
through the assembly. Reassemble the wheels and
the frame cover.
Friction
Wheel
Support
Bracket
Auger
Pulley
Idler
Spring
Auger
Housing
Support
Bracket
Spring
Frame
Rear Auger
Belt
Front Auger
Pulley
Friction
Wheel
Disc
Stop
Bolt
Drive Belt
Friction Wheel
Support Bracket
Hex Nut and
Bell Washer
Chute
Auger
shown resting on
its auger housing
Note: The unit is
Plates
Screws
Friction Wheel Rubber
Hub
Bearing