64 52... Instructions for opening and replacing parts in refrigerant circuit
WARNING: This page is about a different variant/trim than selected.
WARNING:
- Avoid contact with refrigerant and refrigerant fluid
- Follow safety information for handling R134a refrigerant. See 6450... SAFETY INSTRUCTIONS FOR HANDLING R134A REFRIGERANT or 6450... Instructions for handling refrigerant R 134a
- Follow safety information for HANDLING REFRIGERANT FLUID
IMPORTANT:
- Always use new O-rings each time A/C connections are opened (refer to Electronic Parts Catalogue).
- Open the refrigerant 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.
They must not be coated.
Use special tool 00 9 030 to install sealing rings without damaging them.
I. Part replacement as preliminary work fur further repair work and based on gradual leakage
(minor leak, e.g. hairline crack)
Procedure:
- DRAW OFF A/C system, then determine drawn-off refrigerant oil quantity
- Carry out part replacement
- Replace removed refrigerant fluid and additionally top up with new refrigerant fluid according to components replaced:
- Compressor: refer to NOTES ON REPLACING COMPRESSOR
- 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 seals: no additional refrigerant fluid
- EVACUATE AND FILL A/C system.
II. Part replacement due to sudden leak
(major leak, e.g. pipe break due to accident)
Procedure:
- DRAW OFF A/C system, then determine drawn-off refrigerant oil quantity.
- Carry out part replacement
- Replace removed refrigerant fluid and additionally replace with new refrigerant fluid according to parts replaced:
- Compressor: refer to NOTES ON REPLACING COMPRESSOR
- 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 seals: no additional refrigerant fluid
- EVACUATE AND FILL A/C system.