I have a fairly cheap 4post drive on lift which sets outside 24/7 and has for about 6-7 years. It gets worked fairly frequently and the only trouble I have had is rotten hydraulic hoses. Replaced all 3 and it’s back to working fine.
2 weeks ago I bought a 4 post 18,000 drive on rotary lift. It will also reside outside next to its little brother. $250 so I couldn’t refuse it. I’m hoping this thread has educated me enough to have many trouble free years of usage. Thanks all for you insight.

Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
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USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)