How to change a rectifier on a U2000 floor buffer?

It is also important to discharge the rectifier since they store a good amount of energy

The rectifier is in the top end of the motor. Take the cover off and then the top end plate of the motor. With the bolts removed, you will have to tap and rock the plate to evenly remove it. Carefully look at the marks on the old and new part to be shur you do not make a mistake in the wiring. A drawing and photo might be nice too.