•
•
•
•
•
•
Drain the gasoline from the snow thrower, or place
a piece of plastic film under the gas cap.
Tip the snow thrower up and forward so that it rests
on its auger housing.
Remove the six self-tapping screws from the frame
cover underneath the snow thrower.
Roll the front and rear auger belts off the auger
drive pulley. See Figure 17.
Unhook the idler spring from the hex bolt on the
auger housing. See Figure 18.
Back out the stop bolt until the support bracket
rests on the auger pulley.
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 the idler pulley up and lift the belt off the wheel
drive pulley and friction wheel disc. See Figure 17.
Back out the stop bolt until the support bracket
rests on the auger pulley. See Figure 19.
Friction
Wheel
Drive Plate
NOTE: Loosening the six nuts that connect the frame to
the auger housing may aid in belt removal.
Stop Bolt
Drive
Pulley
Auger
Pulley
Drive
Belt
Idler
Pulley
Idler
Pulley
Support Bracket
Auger Pulley
Auger
Belts
Figure 19
•
Slip the belt between the friction wheel and drive
disc. Remove and replace the belt. Reassemble
following the instructions in reverse order.
Frame
NOTE: The support bracket must rest on the stop bolt
after the new belt has been assembled.
Figure 17
•
•
Lift the rear auger belt from the auger pulley, and
slip the belt between the support bracket and the
auger pulley. Repeat this step for the front auger
belt.
Replace both auger drive belts by following
instructions in reverse order.
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.
Friction
Wheel
•
•
•
•
•
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 the six self-tapping screws from the frame
cover underneath the snow thrower.
Remove the click pin that secures the left wheel to
the axle and slide the wheel 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 20.
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.
Support
Bracket
Support
Bracket
Spring
•
•
Auger Pulley
Auger Housing
Idler Spring
Figure 18
14
| Categories | MTD Snow Blower Manuals, Snow Blower Manuals |
|---|---|
| Tags | MTD 643, MTD 663, MTD Snow Blower Manual |
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | MTD, Snow Blower |
| Document File Type | |
| Publisher | mtdproducts.com |
| Wikipedia's Page | MTD Products |
| Copyright | Attribution Non-commercial |
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