need parts detail on removal and re-install spray nozzle arm and center pop up nozzle
Here are your parts
Replacement parts for MAGIC CHEF DU8000B Dishwasher - Undercounter | AppliancePartsPros.com
Here is a manual
http://www.servicematters.com/maytag_library/docs/16008775.pdf
See page 3-21.
Although it does not say, it may be left hand thread.