Very likely the brushes are worn, these are located either side of the motor. if you are able to take the motor off the machine but don't know where the brushes are, take the motor to your local repairer who will probably change the brushes for you at a small fee plus brushes. if you are able to identify the brushes and can take them off, the carbon inside the brush holder should be no less than half and inch long. If its less they are probably worn out. get new ones and replace. be careful the carbon brush is very brittle and will break easily. I can't be more specific on changing the brushes as each machine is different.
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Very likely the brushes are worn, these are located either side of the motor. if you are able to take the motor off the machine but don't know where the brushes are, take the motor to your local repairer who will probably change the brushes for you at a small fee plus brushes. if you are able to identify the brushes and can take them off, the carbon inside the brush holder should be no less than half and inch long. If its less they are probably worn out. get new ones and replace. be careful the carbon brush is very brittle and will break easily. I can't be more specific on changing the brushes as each machine is different.