64 52... Instructions for opening and part replacement in refrigerant circuit

Special tools required:

WARNING:

Avoid contact with refrigerant and refrigerant oil
Follow safety information for handling R134a refrigerant. See TETRAFLUORETHANE REFRIGERANT R134A or R134A REFRIGERANT .
Follow safety information for HANDLING REFRIGERANT OIL .

Attention!

Always use new O-rings each time A/C connections are opened
They must not be coated.

Use special tool 00 9 030 to install sealing rings without damaging them.
Open the referigerant circuit for as short of a period as possible.
Close all components and lines in the refrigerant circuit and return parts immediately following the removals at openings with special tool 32 1 270 to prevent penetration of moisture or foreign objects.
If the refrigerant circuit was closed at the openings with special tool 32 1 270 but it remains open for more than 24 hours, the dryer insert for the air conditioning must be replaced.

Part replacement as preliminary work fur further repair work and based on gradual leakage.
(minor leak, e.g. hairline crack)

Procedure:
- DRAW OFF heating and air conditioning system, then determine drawn-off amount of refrigerant.
- Carry out part replacement
- Replace removed refrigerant oil and additionally top up with new refrigerant oil according to components replaced:
  - Compressor: refer to NOTES ON COMPRESSOR REPLACEMENT .
  - Evaporator: 10 ml
  - Capacitor: 20 ml
- - Desiccant insert/dryer flask: 20 ml
  - Each replaced refrigerant line: 10 ml
  - Capacitor with integrated dryer: 40 ml
  - Safety pressure switch and gasket: no additional refrigerant oil
- EVACUATE AND FILL A/C system.
Part replacement due to sudden leakage
(major leak, e.g. pipe break due to accident)

Procedure:
- DRAW OFF heating and air conditioning system, then determine drawn-off amount of refrigerant.
- Carry out part replacement
- Replace removed refrigerant oil and additionally replace with new refrigerant oil according to parts replaced:
  - Compressor: refer to NOTES ON COMPRESSOR REPLACEMENT .
  - Evaporator: 35 ml
  - Capacitor: 35 ml
- - Desiccant insert/dryer flask: 55 ml
  - Each replaced refrigerant line: 35 ml
  - Capacitor with integrated dryer: 55 ml
  - Safety pressure switch and gasket: no additional refrigerant oil
- Evacuate and fill A/C SYSTEM