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will barely start without help. turning sanding belt begins slow may start but is loud . think motor bearing is out. part number on diagram is 41 but not listed in parts list. How do I obtain motor for this sander. Model 31 080
Unfortunately the motor for the Delta 31-080 is no longer available. The part number for the motor was 1341667. You might take it to a electric motor repair shop and have them give you a quote on replacing the bearings. Also check the pulley bearings, those have a tendency to wear out to.
I would suggest the replacement of the start-run capacitor on the motor. It may be in "start cycle" and never increases speed, or it is shorted, and the start and run cycles are both engaged at same time.
Reply: Motor Bog Down
Check the belt sander pulleys. They could be worn making the belt roll off to one side, slowing down or jamming up the motor.