This machine has no belts. There is an air driven turbine that propels the brushes. If you look under the little glass window at the left front corner of the machine, there is an intake screen just above the indicator dial. That screen is there to keep debris from entering the turbine and will have to be kept clean. If it is clogged, then the turbine will not function.It is also possible that moisture has entered the turbine and siezed the bearings. If that is the case, the turbine would have to be replaced. Also, because this turbine works off the suction of the motor, if the recovery tank lid is not on correctly, then the suction loss will effect the brushes. Check the lid and make sure it is on right.
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