Volkswagen Polo Service & Repair Manual: A/C Service and Recycling Units

Pressure Gauge, Tests and Measurements

Indicators on pressure gauge 1 -  Temperature scale for refrigerant R134a CF3–CH2F or CH2F–CF3. 2 -&nb ...

Extraction System Group Classifications

At this time, A/C service units for extracting, cleaning and filling refrigerant for motor vehicle A/C systems are available from various manufacturers. ...

Other materials:

A/C Compressor with A/C clutch
  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 ...

Catalytic converter
First read and observe the introductory information and safety warningsThe catalytic converter is used for exhaust gas post-treatment and helps to reduce exhaust emissions. To help ensure long-term functionality in the exhaust system and the catalytic converter: Use unleaded petrol only. ...

Refrigerant Circuit with Restrictor and Reservoir
1 -  A/C Compressor 2 -  Condenser 3 -  Restrictor 4 -  Evaporator 5 -  Reservoir with dryer bag ...