Do you know what is wrong with the compressor ? Some issues are rather related to the clutch. For the fan assy, it's very easy but you need to go slowly and check the harnesses nearby and also the upper transmission cooling line to the radiator (one with green clip, may need to slightly rotate it). ...

Regarding removal of the fan and shroud - What oragex says plus, as I recall and he mentions, the fan shroud has a protrusion that likes to hit the hose when pulling it up and out. Trick is to angle it front and back, sort of a twist and dip, so it clears (not forced - just positioning). After doing...

As above, need to watch the cooling pipe from the transmission, early models also had the wiring loom hooked at the bottom of the fan assy. At some point Volvo went with a tricky larger connector the the fan assy A fresh video with alternator and cooling fan removal tips .https://youtu.be/zlp6qvYBJMU