VW Golf manuals

Volkswagen Golf Service & Repair Manual: 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:

Tachograph
In many European countries there is an obligation to install and use a tachograph on vehicles (including passenger vehicles) that serve purely for commercial purposes to transport goods where their maximum permissible weight including drawbar trailer or ...

Downhill driving assistant
First read and observe the introductory information and safety warnings The downhill driving assistant in vehicles with an automatic gearbox helps when braking and travelling downhill  . The downhill driving assistant uses the braking power of the engine. The automatic gearbox selects th ...

Vapour pressure
In an enclosed container that is not completely full, refrigerant evaporates as vapour at the surface in a quantity sufficient to form an equilibrium between vapour and liquid. This equilibrium develops under pressure and is often called vapour pressure. ...

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