I have a customer with a 1/4 hp GE 850 rpm 2 speed fan motor with a bad bearing. It makes a slight clicking noise every revolution. Can these bearings be replaced (or lubed) as he doesnt really want to buy a new motor. It's fine otherwise. It is supposed to be a permanent lube design. Maybe a thrust spacer can be installed between the motor and the fan? The motor is 024-25962-000 or GE 5KCP39NFS379S