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:

Air conditioner service and recycling equipment
At present, various manufacturers offer air conditioner service devices on the market for evacuating, cleaning and charging refrigerant in vehicle air conditioning systems. ...

Repairing smooth pipe
Smooth pipe with a diameter or 5x1 mm or 6x1 mm can be repaired with EPDM hose. – Cut damaged section at right angles out of smooth pipe which is to be repaired. – Select the appropr ...

On a regulated roller dynamometer with contra-rotating rollers for four-wheel drive vehicles
Note The brake test must be performed on a controlled contra-rotating single-axle roller dynamometer for four-wheel drive vehicles. “Contra-rotating” means that the dynamometer rollers of the single-axle roller dynamom ...