Good morning, Tim and welcome to the site.
The 8141 is a heavy beast with a lot of heavy cast iron (cast steel?) parts and generally has a tinned cast iron bowl. The cataloged net weight of the machine is 178 pounds so it you won't have the option for carrying it up stairs. If you remove the cover, cutter head and bowl it makes them much more manageable but the main body of the 8141/84141 is still really heavy.
The later models used a lighter stainless steel bowl and, eventually, a cast aluminum body and weigh a LOT less.
Both of my bowl cutters (14" and 18") are the lighter later style. I keep both of mine in the basement but use them in the kitchen. With that said toting the 18" one up the stairs can be tough on my mildly arthritic knees so as we have a "walk-out" basement I'll usually back the truck up to the door and drive the 18" one around to the garage so I only need to tote it into the kitchen and set it on the island.
Please post a few pictures of the machine and especially the pins on the machine base that the cover pivots on. And add your location please.
It may take me a few days to get back to you but if you have the cast iron bowl and need some advice on where to get the bowl re-tinned, possible repair part sources , tips and tricks etc please post your questions.
Worth noting, if your machine has the accessory hub for a grinding, slicing or shredding attachment the model number would be 84141 so try that model number also in any online searches.
I have the instruction/parts manual and the spec sheet for your machine in PDF format if you need them.
Best regards,