Hose/Line HVAC: Description and Operation

A/C System 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 factory specified replacement hoses and lines.

Hoses and lines are fastened together with threaded couplings/fittings and are retained (to bodywork or components) with specially isolated hose clamps.


NOTE:
- During servicing, all couplings, fittings and related fasteners must be torqued to specifications.
- Ensure that only special tools (as specified) are used while servicing.