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 or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Vehicle Damage Warnings

CAUTION:
- Do not use an R-12 manifold gauge set on an R-134a system. The refrigerants are not compatible and system damage will result.

- Never add R-12 to a refrigerant system designed to use R-134a. Damage to the system will result.

- R-12 refrigerant oil must not be mixed with R-134a refrigerant oil. They are not compatible.

- Do not overcharge the refrigerant system. This will cause excessive compressor head pressure and can cause noise and system failure.

- The refrigerant system must always be evacuated before charging.

- Do not open the refrigerant system or uncap a replacement component until you are ready to service the system. This will prevent contamination in the system.

- Do not open the refrigerant system or uncap a replacement component until you are ready to service the system. This will prevent contamination in the system.

- Before disconnecting a component, clean the outside of the fittings thoroughly to prevent contamination from entering the refrigerant system.

- When installing a refrigerant line, avoid sharp bends that may restrict refrigerant flow. Position the refrigerant lines away from exhaust system components or any sharp edges, which may damage the line.

- Tighten refrigerant fittings only to the specified torque. The aluminum fittings used in the refrigerant system will not tolerate overtightening.

- When disconnecting a refrigerant fitting, use a wrench on both halves of the fitting. This will prevent twisting of the refrigerant lines or tubes.

WARNING: REVIEW THE WARNINGS AND CAUTIONS BEFORE LEAK TESTING THE SYSTEM.