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:

Checklist
Carry out the steps in the specified order : To ensure that the engine oil reading is correct, park the vehicle on a level surface with the engine at operating temperature. Switch off the engine and wait a few minutes for the engine oil to flow back into the sump. Open t ...

Subsequent bleeding of hydraulic system
Note Carry out subsequent bleeding when: brake pedal travel is too long or so-called »soft brake pedal« Subsequent bleeding requires the assistance of a second mechanic. –&n ...

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Under certain circumstances, the display may show errors or messages according to status. The most frequent display messages are listed below, together with suggested solutions. Note For messages not liste ...