run motor and set A/C on max, blower on full, pull a vacuum on the system and recharge with R12a 2.9Lbs
No, they are not user serviceable
ebay, salvage yards, craigslist, local used foreign/volvo shops
bearing
four
The fuses for a 1988 are inside driver side on the left hand side down below (where the hood release is)
the valve is usually located on the back of the AC compressor itself. If not there, you could also look for it along the line by the AC dryer. Look for the port that is on or closest to the LARGE hose line for the a/c. This is the only one you use to recharge the a/c. On most 240's it is sticking out of the lower back of the a/c compressor and is tough to get to if you don't remove the mass airflow meter. Of course the car won't run without the meter so I actually remove it, then replug it while charging the a/c.
Yes
four
De Luxe
it's just got 2 bolts holding it on, going through the bell housing and label the wiring .
No
Yes, there is an engine wiring schematic for a 1981 Volvo 242 DL. You can find this schematic online at places like Volvo Tips and E Euro Parts.