Troy-Bilt 772C0767 - Manuel (Page 16)

16
Figure 19
• Lift the auger belt from the auger pulley, and slip
belt between the support bracket and the auger
pulley. Repeat this step for the front auger belt. See
Figure 20.
• 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.
Figure 20
Drive Belt
• Follow the first six steps of the instructions for
servicing the auger belts.
• Pull the idler pulley up and lift the belt off the engine
pulley and friction wheel disc. See Figure 19.
• Back out the stop bolt until the support bracket
rests on the auger pulley. See Figure 21.
• Slip the belt between the friction wheel and drive
disc. Remove and replace the 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 21.
Figure 21
Replacing 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.
• Tip the snow thrower up and forward, so that it rests
on the housing. Refer to Figure 10.
• Remove six self-tapping screws from the frame
cover underneath the snow thrower.
• Using a 7/8" wrench to hold the shaft, loosen, but
do not completely remove, the hex bolt and cupped
washer on the left end of gear shaft. See Figure 22.
• Lightly tap the hex nut to dislodge the ball bearing
from the right side of frame before removing the hex
nut and bell washer from left end of shaft.
• Move the gear shaft to the right and slide the friction
wheel assembly from the shaft. See Figure 23A.
• Remove the four screws from the friction wheel
assembly. See Figure 23B.
• Remove the friction wheel rubber from between the
friction wheel plates.
• Reassemble new friction wheel rubber to the
friction wheel plates and hub, tightening the four
screws in rotation and with equal force.
Auger
Pulley
Drive
Pulley
Drive
Belt
Idler
Pulley Idler
Pulley
Auger
Belts
Frame
Frame
Support
Bracket
Spring
Auger
Housing
Idler
Spring
Front
Auger Belt
Rear
Auger
Belt
Auger
Pulley
Support
Bracket
Drive Plate
Friction
Wheel
Stop Bolt
Support Bracket
Auger Pulley