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. |
| 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. |
|
Observe instructions specific to the workplace;
→ Volkswagen ServiceNet; Handbooks; Service handbook;
Environmental protection. Refrigerant from air
c ...
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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Basics for working on refrigerant circuit
Before operating the air conditioning system after recharging with
refrigerant