I have a RO 90 sander that has developed a "chirping" sound when I sand. It is not a continuous nor is it rhythmic but happens each time I use it now. Is there a place that you can lubricate the motor without taking the unit apart? I have had the sander for about a year. My shop is not heated but I did not think that was the cause as my RO 150 does not make the sound and I have used them both about the same amount of time. Any suggestions?
Bruce
Bruce