MTD 31AE633E401 - Manual (Page 15)

15
Figure 21
• Unhook the idler spring from the hex bolt on the
auger housing. See Figure 22.
• Back out the stop bolt until the support bracket
rests on the auger pulley. See Figure 23.
NOTE: It may be necessary to loosen the six nuts that
connect the frame to the auger housing to aid in belt
removal.
• Lift the rear auger belt from the auger pulley, and
slip belt between the support bracket and the auger
pulley. See Figure 22. Repeat this step for the front
auger belt.
Figure 22
• Replace both auger drive belts by following
instructions in reverse order.
NOTE: If you placed plastic film under the gas cap, be
certain to remove it before operating the snow thrower.
Drive Belt
• Follow the first four steps of the instructions for
servicing the auger belts.
• Pull idler pulley up, and lift belt off engine pulley and
friction wheel disc. See Figure 21.
• Back out the stop bolt until the support bracket
rests on the auger pulley. See Figure 23.
• Slip belt between friction wheel and friction wheel
disc. See Figure 23. Remove and replace belt.
• Reassemble the parts removed earlier.
NOTE: The support bracket must rest on the stop bolt
after the new belt has been assembled. See Figure 23.
Figure 23
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.
• Remove six self-tapping screws from the frame
cover underneath the snow thrower.
• Remove the click pins which secure the wheels,
and remove the wheels from the axle.
• Using a 7/8" wrench to hold the shaft, loosen, but
do not completely remove, the hex nut and bell
washer on the left end of gear shaft. See Figure 24.
Rear Auger
Belt
Drive
Belt
Engine
Pulley
Engine
Pulley
Idler
Pulley
Idler
Pulley
Front
Auger
Belt
Friction
Wheel
Support
Bracket
Auger
Belt
Frame
Auger
Pulley Idler
Spring
Auger
Housing
Support
Bracket
Spring
Friction Wheel
Friction
Wheel
Disc
Drive Belt
Support Bracket
Stop
Bolt