The water supply shut off valves must be turned off- see article How to Turn Off the Water Supply to the Faucet.
Recommended Tools: Phillips Screwdriver, Pliers
To replace the cartridge see article 1224 Cartridge: Two Handle 4" Centerset Bathroom Faucets.
For additional information on Moen products visit solutions.moen.com and select the type of product you are repairing. The guide will contain repair details, troubleshooting and specific information on assembling handles associated with that style of product.
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