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)

Or, hide this message: temporarily or permanently

Refrigerant Circuit O-Rings






Refrigerant Circuit O-Rings

Always use only once. Replace according to Electronic Parts Catalog.

Lubricate with refrigerant oil before installing. Refer to Electronic Parts Catalog.

Pay attention to correct positioning on pipe/in groove.

Ensure cleanliness when working.

Install only O-rings that are resistant to refrigerant R134a and corresponding refrigerant oil. These O-ring seals are color-coded to avoid mistakes (currently red, light purple and dark purple). Refer to Electronic Parts Catalog.

The O-ring dimensions - a - and - b - are different depending on installation location. Refer to the Electronic Parts Catalog.






In addition to the color-coded O-ring seals, use is also made at the factory of black O-ring seals for certain connections.