Disable the engine by pulling off the spark plug wire. Remove exterior shrouds, cover plates and belt guards to expose the traction clutch belt. In most snowblowers, the shroud is secured with cap screws, hex-head screws or clips. Belt guards typically are secured with hex-head screws. Undo the fasteners with a screwdriver or socket wrench to release shrouds and guards. Lift them off the machine. Unfasten and remove any other obstacles blocking access to the traction drive belt.
Draw a diagram of how the traction clutch belt winds around the pulleys. This will be a guide for correct installation of your new belt. Disengage the clutch to loosen the idler pulley that engages the clutch. Slip the worn traction clutch belt off the pulleys with your hands.
Verify that your new traction clutch belt is an appropriate replacement for your old belt. Slip the new belt on over the pulleys, following the diagram you drew in step 2. Check traction clutch operation by engaging and disengaging the clutch. Adjust traction clutch tension according to the manufacturer’s directions, if necessary.
Reinstall belt guards, cover plates, shrouds and anything else you had to remove to gain access to the traction drive belt. Reconnect the spark plug wire on the engine.