For any major issues with the garbage disposal, you should leave the job to a professional plumber only. Reaching your hand into the drain is dangerous, even if you believe the power is shut off. A plumber can help you evaluate the state of your disposal, and decide whether or not you need a new unit. Upgrading to a faster disposal unit with a higher horsepower can help to protect your pipes and make cleaning up after meals even easier.
This part of the installation starts by removing the old mounting ring by loosening the mounting screws and then removing the snap ring, which holds the mounting assembly on the sink flange. You’ll need to use a flathead screwdriver to remove the snap ring. Next, remove the mounting ring by inserting the screwdriver into the tabs and turning the mounting ring assembly until it is free from the tabs. Be sure to support the bottom of the disposer as you do this. After this comes off, the entire mounting assembly will come free from the sink flange. Once free, pull the sink flange out from the top of the sink and scrape or wipe any old putty off the sink before wiping it clean with a towel.
Another common cause for a leaking garbage disposal is the disposal flange. A leak at the very most upper area of the garbage disposal could be the garbage disposal flange which goes through the sink. A garbage disposal flange should be sealed with Plumber’s putty and then tightened from underneath the sink. If this is not tight enough or if it has managed to come loose (which can happen) then the garbage disposal will have to be taken down so the flange can be resealed and then the garbage disposal can be rehung.