In my yoot I replaced the hydraulic governor, linkage, thrust bearing, and outboard radial bearing on a steam turbine and got it back in service before the fractionator tower had time to reach the high high alarm level (18 minutes from the time it was shut down til the time it was back on line, saved the company about a $mil).
I've reconnected the linkage on a lubricator box on a large reciprocating compressor without shutting the machine down, don't recommend that one. Tools were litterally flying.
More recently I've taken over a department that was completely disfuctional and in 3 years cut headcount in half, increased reliability to a world class 78 month MTBR for centrifugal pumps with a repeat breakdown percentage of 2.2% (also world class), and at the same time cut spending by 45%.
And more than doubled my pay in the process
