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:

Removing tyres, run-flat tyres, ultra-high-performance tyres
Only trained personnel may perform any assembly work on run-flat tyres and ultra-high-performance tyres. If fitted, check tyre pressure sensor using vehicle diagnostic tester, and renew it as necessary.   Note ...

Bleeding coolant circuit of auxiliary heater
The removal and installation procedures for the auxiliary heater and the circulation pump -V55- described in this Workshop Manual ensure that only a small quantity of air enters or remains in the coolant circuit. Therefore it is not necessary to bleed th ...

Removing and installing coolant pipes for auxiliary heater
Special tools and workshop equipment required     Torque wrench -V.A.G 1410- (4…20 Nm)   Hose clamps, up to 25 mm -3094- ...

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