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 interface for entry and start authorisation system -J965-
Note When renewing the control unit, select Renew function for the respective control unit in Guided fault finding or Guided functions mode → Vehicle diagnostic tester. The removal and insta ...

Releasing gas and draining front gas-filled shock absorbers, DCC shock absorbers
– Clamp gas-filled shock absorber vertically in vice. WARNING Safety goggles must be worn when drilling. – Drill a 3 mm hole -A ...

Continuation of checking pressures
Where vehicles have a restrictor and reservoir, check these (with internally regulated air conditioning system compressor) → Chapter. Where vehicles have an expansion valve and receiver, check these (with internally regul ...