Volkswagen Golf Service & Repair Manual: Pipes and hoses in refrigerant circuit

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General information on refrigerant circuit / Refrigerant circuit components / Pipes and hoses in refrigerant circuit

The mixture of refrigerant oil and refrigerant R134a attacks certain metals (e.g. copper) and alloys and dissolves certain hose materials. Therefore, always use genuine replacement parts.

The hoses and pipes are held together with screwed joints or special push-fit joints.

Note

When assembling screwed joints, be careful to comply with the prescribed torques, and when working on push-fit joints, be careful to use the disconnection tools provided.

O-ring

These O-rings seal the joints between the individual components of the refrigerant circuit. Use only seals that are resistant to refrigerant R134a an ...

High-pressure safety valve

The high-pressure safety valve is fitted to the air conditioner compressor or the receiver. The valve opens at a pressure above approx. 38 bar and ...

Other materials:

Removing and installing support for luggage compartment floor, estate
Special tools and workshop equipment required Removing – Fold down rear seat backrests. – Turn fasteners on left and right of luggage c ...

Blowing through refrigerant circuit with compressed air and nitrogen
Use compressed air to force moisture and other contaminants out of the refrigerant circuit and use nitrogen to force moisture out of the refrigerant circuit. The method of blowing through the refrigerant circuit with compressed air ...

Removing and installing control unit for electronic steering column lock -J764-
Note When renewing control unit, select Renewal function for respective control unit in “Guided fault finding” or “Guided functions” using → Vehicle diagnostic tester. Special tools and workshop equipmen ...