I purchase a router model #91130, I am having trouble with the router motor its vibrating and smoking. the manual says to lubricated all moving parts, but I didn't see any place to lubricated other than along side of the spindle. I took it apart and the only thing that I found w a brass bearing instead of a sealed breaming like the bottom bearing (608z}. I would like to purchase a new motor, and spared (6904rs}