There is no way to tighten plate that I know of.
Maybe a clever welder could stick it back together, but the problem implies something underneath is rusted out or broken. The main thing is the cutter plate, and if disposal wobbles, it will loosen drain pipes under sink and cause dripping.
I wrote some tips for installing new disposal, and include them here since disposal will be replaced at some point.
When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket.
How to replace disposal:
Disconnect p-trap and tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.
If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Make sure there's enough putty that it squeezes up all around sink basket.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.
Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image above, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.
When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.
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Hi john sumner, I want to help you with your question, but I need more information from you. Can you please add details in the comment box? Please provide make and model number of your washing machine and some details on the problem. For example where is the basket and what is dripping.
Admiral mod#atw4676 the water is leaking from the top back under the control panel
machine is less than 4 months old, it acts like the machine shutoff valve is not working correctly.
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