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:

Identification
Gearbox identification The following information is indicated on the gearbox (example): KHN = Gearbox code 01.06.06 = Production date 14 = Factory code 13:59 = Production time 0026 = Serial number ...

Control and regulating unit for air conditioning system -J127
This control and regulating unit switches off the refrigerant flow through the second evaporator if the temperature at the cooling fins of the second evaporator falls to the freezing point of water (icing protection).   ...

Vibration, causes for vibration
Vibration can have a number of different causes. Vibration can also be caused by tyre wear. Tyre wear caused by driving is not always evenly spread across the entire running surface of the tyre. This causes slight imbalances which affect the smooth runni ...

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