Prevent leaks by replacing your Moen cartridge.
If you own a Moen 7400 kitchen faucet, chances are the seals inside the cartridge are starting to wear. Once the seals wear down, leaks may begin to form around the handle. One way to stop these leaks is to replace the cartridge. This project takes about a half hour to complete. It involves just a few basic skills and is easy to master. Having an instruction manual nearby will only help move the process along a little faster.
Instructions
1. Shut your water valves under the sink by turning them left or counterclockwise.
2. Take off the cap from the handle by prying it up with a small screwdriver. Unscrew the screw inside the handle with an Allen wrench and take off the handle.
3. Remove the dome and pivot assembly by twisting it to the left by hand. Use a pair of pliers if this part does not come off readily. Remove the retainer nut under the bonnet cap with the pliers by twisting it to the left.
4. Remove the spout and then the diverter (if your unit has a sprayer) by turning it to the left. Take off the washer and then pry out the retainer clip with your pliers. Finally, remove the cartridge assembly.
5. Slide the new cartridge into the faucet head after lining up the grooves on it with the faucet head slots. Replace the parts in reverse order as they were removed to reassemble the unit.
