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:

Checking securing parts and anchorage points after an accident
Latch plate deformed (stretched) Height adjustment does not function. Anchorage points (seat, pillars, underbody) distorted or thread damaged If damage is determine ...

Balancing wheel, balancing wheel with finish balancer
Note Before working with a finish balancer, the mechanic needs to have been instructed by the manufacturer of the balancer. To balance the wheels, set the wheels of the driven axle on the sensor platforms. On front-w ...

Removing and installing Denso belt pulley
Note The pulley is sensitive to impact and should therefore be treated with extreme care. If the belt pulley overload protection has deployed, check freedom of movement of air conditioner compressor before rene ...