Mitsubishi 3000GT Service Manual page 1239

Adaptor valve (1)
Adaptor valve (2)
(Low pressure)
(High pressure)
Vacuum
Vacuum
Adaptor valve (3)
(Low pressure)
I
HEATERS AND MANUAL
AIR CONDITIONING
CHARGING SYSTEM
If leak is evident
If leak is evident
The refrigerant system must have been evacuated using the
previous procedure before charging.
Charge using only R-12 refrigerant. R-12 is available in bulk
tanks or small cans. Follow the safety precautions for handling
R-12 as listed in this group.
CHARGING THE REFRIGERANT <Vehicles
using R-l 2 refrigerant>
CHARGING WITH SMALL CANS
When using disposable cans of this type, follow carefully
the can manufacturer's instructions.
(1) Start up the vacuum pump.
(2) Evacuate to a vacuum reading of 100 kPa (14.5 psi)
or higher (approx. 10 minutes).
Caution
To prevent the indication from going wrong, vertically
stand the vacuum gauge and read the scale.
(3) Turn the high pressure adaptor valve (2) handle all the
way counterclockwise (valve shut).
(4) Stop the vacuum pump and allow to stand for 5 minutes.
(5) Check for leaks. (Good if the vacuum is held.)
TSB Revision
Hold this condition
Gas leak check
Refrigerant charge