Your components are all 30+ years old, so you can replace them if you want, but, with the exception of the dryer, they should all work at least as long as they have, unless they are damaged somehow.
I would at least investigate the expansion valve, as they are a known restriction when debris is present in the system. That alone may save you from having to disassemble the entire system. A pressure check should identify the blockage there, if it exists.
As
@baldilocks mentioned above, conventional wisdom is to replace the dryer anytime the system is opened, since it's a water trap by design, it'll collect water as soon as it's exposed to the air.