Here's some pics of digging into a Baldor motor to repair a bad centrifugal switch posted by Bob Vaughan {Reference:http://owwm.org/viewtopic.php?t=31506|http://owwm.org/viewtopic.php?t=31506}. In this example, the contacts were damaged and needed repair.
Remove the fan cover
Remove the fan (be careful here)
Remove the fan (be careful here)
Remove the motor bolts
Mark where the end bells line up
Knock loose the rotor from this direction
Here's what you should see inside. Note charred contact points
Knock loose the back end bell (Ok, ok, so its a different motor shown)
Here's the end bell
Here's the points that need filing, sanding, and otherwise smoothing out. Be careful not to bend the copper springs.
Set the motor upright on two blocks and insert the spring washer into the bearing housing
Carefully put the rotor back in
Carefully put the rotor back in
Gentle pounding should seat things
Tap on a stick to rotate end bells for proper alignment and assemble motor