bosch table saw losing power

[altoolman]

I have had the bosch table saw for a number of years. Lots of miles of ripping everything. It seems to not have the power it use to. I have to baby it, if I am ripping something pretty thick, it will bind or stop. Could someone tell me where I should start looking or replacing? Also when I tilt the blade to cut a 45, the blade hits the lower bar underneath the table when I start it up?