This step-by-step repair guide shows how to replace the friction disc on a snowblower. The friction disc helps propel the snowblower forward. When the friction disc is in contact with the spinning drive wheel, the friction disc rotates and turns the axle. If the friction disc is worn or damaged, the snowblower moves slowly or erratically. Replace a worn out or broken snowblower friction disc with a manufacturer-approved replacement part.
This repair procedure works for Craftsman, MTD, Troybilt, Noma, Murray, Ariens, Husqvarna and Snapper snowblowers.
Disconnect the spark plug wire
Pull the spark plug wire straight up and off the plug.
Remove the frame cover
Tip the snow blower forward so it rests on the auger housing. Remove screws that secure the frame panel located between the wheels. Detach the panel to access the drive system components.
Tip the snowblower on its nose.
Remove the frame panel.
Remove both wheels.
Remove the bolts that secure each wheel to the axle. Pull off both wheels.
Remove the wheels.
Remove the hex shaft mounting nut
Hold the hex shaft stationary with a 13/16-inch open-end or adjustable wrench. Remove the mounting nut using a ratchet and 1/2-inch socket or wrench.
Hold the hex shaft stationary.
Remove the shaft mounting nut.
Remove the friction disc
Lightly tap the left end of the hex shaft to push the bearing out of the right side of the frame. Remove the bearing. Carefully pull the hex shaft down and to the left. Pull the friction disc off the shaft.
Clean the shaft
Remove any rust from the shaft and clean it thoroughly. Apply anti-seize compound to the shaft.
Install the new friction disc
Slide the new friction disc onto the hex shaft. Position the friction disc properly and push the hex shaft back into the bearing on the right side of the frame. Reinstall the hex nut and tighten.
Reinstall the wheels.
Push the wheels onto the axle. Reinstall the washer and mounting nut on each wheel. Tighten the mounting nuts securely on the axle.
Reinstall the frame panel
Position the frame panel and line up the mounting holes. Insert the mounting screws and tighten firmly. Pivot the snow blower upright so it rests on its tires.
Test the snow blower
Reconnect the spark plug wire. Fill the tank with gas and test the snow blower.
You need a spark to fire up the engine of your snowblower, and that spark comes from a spark plug. You can replace one in minutes.
Replace the fuel line on your snowblower if it's cracked or damaged.
The shear pin breaks if you hit hard-packed snow, to protect the engine from damage. Your snowblower auger won't rotate until you fix it. You can replace it in about 10 minutes.
This video shows how to adjust a snowblower's auger control.
Learn how to tighten a snowblower drive control if the drive slips or doesn't engage, and how to loosen it if the snowblower creeps when you disengage the drive.
See how to replace the chute control rod on a snowblower.