Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la
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System Charging


Recovery / Evacuating / Charging

NOTE: Do not add R-12 refrigerant to an A/C system designed for R-134a or vice versa. Never mix these two types of refrigerants, or the A/C system could be damaged.
R-12 and R-134a components are not interchangeable. Do not replace components of an R-134a system with components for an R-12 system or vice versa. Mixing components will cause damage to the A/C system.
Follow the procedures on the refrigerant recovery/recycling/charging station to be used.




If the condenser or the receiver/drier is replaced, add 1.0 oz (30 cc) of compressor oil during charging.