Volkswagen Polo Service & Repair Manual: Refrigerant Circuit Extraction and Filling Valves for Service Station Couplings

Refrigerant Circuit with Restrictor and Reservoir

1 -  A/C Compressor 2 -  Condenser 3 -  Restrictor 4 -  ...

Evacuating and Charging Valve with Schrader Valve

Special tools and workshop equipment required Torque Wrench 1783 - 2-10Nm -VAG1783- with Torque Wrench 1783 - 1/4" Drive Ratchet -VA ...

Other materials:

Releasing and Disassembly Contact Housings, General Information
  Note Observe general notes for repairs on the vehicle electrical system. Refer to → Chapter „Vehicle Electrical System, General Repair Information“. Always use the release tools intended for the ...

Expansion Valve
  Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system. Only use tools and materials approved by the manufactu ...

Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as refrigerant. The refrigerant employed is tetrafluoroethane R134a, which bo ...