VW Golf manuals

Volkswagen Golf Service & Repair Manual: O-ring

Use only O-rings that are resistant to refrigerant R134a and related refrigerant oils. O-rings are no longer colour-coded. Coloured and black O-rings are used.
Check that the O-rings used have the correct internal diameters.
→ Rep. gr.87
→ Parts catalogue
Never reuse O-rings.
Before installing, moisten O-rings lightly with refrigerant oil (PAG oil).
  Note
When purging components with compressed air and nitrogen, always collect the gas mixture exiting the component with suitable exhaust gas extraction equipment (workshop fume extractor).
After completion of repair work screw sealing caps (with seals) onto valve and service connections.
Before operating the air conditioning system. Check the vehicle-specific charge quantities → Rep. gr.87.
Do not top up a charged refrigerant circuit; discharge refrigerant present and recharge system.
Basics for working on refrigerant circuit
Observe instructions specific to the workplace; → Volkswagen ServiceNet; Handbooks; Service handbook; Environmental protection. Refrigerant from air c ...

Before operating the air conditioning system after recharging with refrigerant
After installing a new air conditioner compressor or filling with fresh refrigerant oil (e.g. after blowing out refrigerant circuit), turn compressor pulley 10 r ...

Other materials:

Assembly overview - evaporator housing
  Note There are different designs and makes of heater and air conditioning unit. The individual components of the various heaters and air conditioning units are similar but not identical. The combined fitting of different makes of component ...

Safety precautions when working on vehicles with Start/Stop system
Note the following when working on vehicles with Start/Stop system:   WARNING Risk of injury due to automatic engine starting in vehicles with a start-stop system. ...

Changing headlights over from driving on left to driving on right, LED headlights
If a right-hand drive vehicle is driven in a left-hand drive country, or vice versa, the headlights must be converted. This is necessary in order to avoid dazzling oncoming traffic with the asymmetric low beam headlights.   Note ...

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