A/C repair questions

My A/C compressor locked up and I’m getting ready to replace just about the entire system. I picked up a compressor off a truck with 66K from a wrecker. First, what is the part circled in the picture? Should it be replaced? And secondly, how do I know how much oil is in this? When I turn it on its side and turn the clutch, nothing comes out. Is it safe to assume it’s empty? Thank you!

 

Yes it is empty of oil. There is a manufactuyrers specification for amount and type of oil that you pour into the compressor. The broken part looks like the pressure switch and yes replace it.

 

what you can do is fill it up with the recommended oil and drain it back out and see if you get the recommended capacity out. If you do then you know youve drained all of it out. Then just fill it back up with the recommended amount. Thats what i would do

 

yes also replace the switch

 

That's not a switch,
https://www.tacomaworld.com/threads...seized-compressor.293204/page-5#post-18782154
and the included quote.

 

If your original AC system had a catastrophic failure you should clean the system, almost impossible to clean the inside of the evaporator. Metal chunks are way bad for your used new to you compressor. These days you should just buy all the components aftermarket for like $350 and have a new solid system. It's not a lower ball joint you don't need to go factory you just want cold reliable air. I live in Texas A/C not an option. Learned my lesson and learned to replace it all if compressor fails and introduces debris into the system.