Meat grinder - needs repair (Champlain Park)

Waring Pro Meat Grinder MG800C
This is an inherited grinder that is many years old.
Something broke or came loose inside while I was in the middle of grinding for sausage.
When you turn it on the motor starts and the shaft turns forward briefly before stopping.
Reverse works fine.
A spring clip fell out of the underside vent but there is still some small part loose inside.
I have neither the time or the tools to open up and investigate, but if you do maybe you can get it working again. There seems to be a source for spare parts online, if needed.
3 different sized plates, stuffing tubes, plunger, cap wrench

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