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:

Spraying the evaporator with the suction feed spray-gun -V.A.G 1538- and spray lance
Spray the evaporator with Contra Sept directly using a spray lance (approx. 10 bar). Contra Sept neutralises microbes and bacteria directly at the evaporator. In order to enable access to the evaporator, some preliminary work and differe ...

Checking valve guides
Special tools and workshop equipment required Universal dial gauge bracket -VW 387- Dial gauge -VAS 6079- ...

Additional safety instructions for curtain airbag
Inspect trims for damage prior to installing them. Always renew damaged pillar trims; never repair. Ensure proper seating of trims when installing them. When performing r ...