The shower diverter on a Moen #82402 leaks a lot, what should I do to correct this, and how do you disassemble it?

The shower diverter on a Moen #82402 leaks a lot, what should I do to correct this, and how do you disassemble it?
I don't understand your question. Your Moen tub/shower valve # 42402 does not have a internal diverter, your diverter's on the spout. Are you asking how to replace the spout? If so There are two types of diverter spouts slip on and threaded, (see images) let me know what type you have and we'll get you back running. Regards, Tom

Thanks for responding, the model # is 82402, and my problem is the amount of water that leaks past it when the shower is operating.

Hope you can help, and thanks again for responding.

Shower pan removal