HVAC 072 B Semi hermetic reciprocating compressor opened up

I rushed threw this video and I left out a lot of information and some of the details where not on point. However if your interested to learn more, I have included this link. Everything you could ever want to know about this compressor listed below. https://www.shareddocs.com/hvac/docs/2002/Public/06/020-611.pdf Edit: there are 2 types of unloaders, hot gas bypass and suction cut off. I said in the video it was hot gas bypass but it was actually a suction cut off. here is a link http://bcr.us.com/technical-data/capacity-control/06d-06e-suction-cut-off/