After 6.5 years, our Lift-Off Pet Revolution 18Z6 Agitator stopped turning the agitator. We also smelled a strange smell while vacuuming. The combination of replacing this belt and the roller itself solved the problem. Some people have noticed that this belt is tighter than the previous one. I think that was to be expected. The reason the old belt no longer works is that it has stretched and no longer has the correct tension to transmit the rotary motion from the motor to the pulley.
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