This is great stuff.
To all who have contributed to this list THANKS!
I've been doing almost right for several decades.
The part I wasn't doing is in blue.
I made a few corrections to the text.
Printing this and putting it with the equipment.
Vacuum the A/C System
1. The A/C connector on the passenger side with black cap (just inside of shock) is
High Side.
2. The A/C connector on the Accumulator/Drier is the
Low Side.
3. Connect gauges to the Vacuum Pump (yellow line center of Manifold).
4. Connect Low Side (Blue Line) to Accumulator/Drier connection.
5. Connect High Side (Red Line) to High Side connection just inside passenger wheel well (lower line on Evaporator Housing).
6. Open both High Side and Low Side Manifold Valves and turn on Vacuum Pump for 60 minutes.
7. Shut Manifold Valves (then shut OFF Vacuum Pump) and make sure Vacuum does not leak down indicating a System Leak.
8. If NO LEAKS, Install New Accumulator/Drier and repeat this process.
Charge the A/C System
1. With both Manifold Valves closed, hook up a can of R12 to the yellow middle hose (see Note #1 below).
2. Turn the can valve fully counterclockwise to open the valve.
3. With the can upright, crack the fitting on the yellow hose where it attaches to the gauge manifold to purge the air out of the hose, then re-tighten it.
4. You can now invert the can and crack the blue Low Side valve and charge until the pressure equalizes between the can and system (no more flow is felt or heard). Never open the Red High Side valve during the Freon Charging process.
5. Now start your car and set the climate control for Max cooling with blower on high. Ensure that the compressor clutch is engaged at this point (see Note #2 below). You can now charge the remainder of the first can with can in an upright position. Always charge with can upright when compressor is running.
6. Once the first can is in, (you'll know it's all in when you can shake the can and not feel any liquid sloshing in it) you can shut the low side valve and swap to the second can.
7. Remember to purge the yellow line again prior to charging.
8. Continue this until you have added the correct amount of Freon, per the FSM. Once the system is fully charged, shut off the compressor and allow High Side and Low Side pressures to equalize before disconnecting the gauge manifold from the system.
9. Once the manifold is disconnected, cap the high and low side fittings, reconnect the pressure cycling switch and you're done.
2 Stage Vacuum Pump
Manifold and Gauges
Adapter Connections R134a to R12
.R12 Can Connector and Gauge
Notes:
1. Prior to connecting the valve to the freon can, unscrew the valve stem fully(you will see the needle in the valve retract up into the body). Then screw the valve onto the can. Now turn the valve fully clockwise to puncture the can.
2. If the compressor clutch is not engaged, you will have to pull the connector on the pressure cycling valve in the low side line and jumper it. The compressor clutch should now engage.