Volkswagen Golf Service & Repair Manual: O-ring

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General notes on air conditioning systems / Basics for working on refrigerant circuit / 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 ...

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