Used jack to level a house. Just all day for 2 days with no issues or leaks. Also used on 18 wheeler multiple times with good service. Jack is tall and heavy so keep that in mind if considering purchasing.
Found this while looking for a jack for my homemade shop press. It works great when it's warm but not so much when it's cold. I had to take apart the pneumatic part and clean some of the "grease" out to make it work better. I will have to take it apart periodically to regrease it.
Donnie 
luke m 
Rick 
TheKid 
