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:

Tools and materials commercially available
Caution Non-authorised tools or materials (e.g. leak inhibitor additive) may cause damage or adversely influence the system. Only tools and materials a ...

Balancing wheel, checking radial and lateral run-out on wheel rim
– Attach rim to wheel balancing machine. – Use the centring system for wheel balancing machines -VAS 5271-. – Preload tyre gauge approx. 2 mm. – Tu ...

Checking seat belts
WARNING The seat belt system must be inspected systematically after every accident! If damage is determined at any of the points to be checked, customer must be informed regarding necessity of changing belt ...