The refrigeration compressor disassembled

Welded hermetic compressors are sealed at the factory.  When they fail, there is no way to repair them.  So sometimes its a mystery why they failed.
Below is number of compressors that have been cut open.  Sometimes we can tell what failed when we look at them.  Sometimes we can only tell how the are constructed.  

So far all the compressors we have seen are piston type.  Many compressors are now of a different design.
The ones below are scroll compressors.  The are a little more efficient and tolerate liquid passing through better.

More coming