O-Rings, Hoses and Lines

O-Rings







O-rings seal the connections between components of the A/C system.

Use only O-rings which are compatible with R-134a refrigerant and refrigerant (PAG) oil. Refer to the most recent parts information when obtaining new O-rings.

O-rings are recognized by colors (currently red, green or violet). Under certain conditions, black O rings may also be installed in production.

NOTE:
- Use O-rings only once and always replace.
- Handle the O-rings only in a clean working environment.
- Always use correct size O-rings (dimensions -a- and -b-).
- Lubricate the O-rings with refrigerant (PAG) oil before installing.
- Always make sure to properly install the O-rings on line/component mounting flanges/grooves.
- O-ring and torque specifications also apply to the threaded connections in the A/C lines.

Hoses and lines
The mixture of refrigerant oil (PAG oil) and refrigerant R-134a attacks some metals and alloys (for example, copper) and breaks down certain hose material. Use only hoses and lines which are identified with the lettering "R-134a."

Hoses and lines are secured with threaded connections. Always properly torque hose and line connections.