Removal and Replacement

64 52 ... - Instructions for opening and replacing parts in refrigerant circuit

Warning!
- Avoid contact with refrigerant and refrigerant oil
- Follow safety instructions for handling R134a refrigerant
- Follow safety instructions for handling refrigerant oil Instructions for Handling Refrigerant Oil (for Refrigerant R 134a)
Caution!
- Always use new O-rings each time A/C connections are opened (refer to Electronic Parts Catalog)
- Moisten O-rings with refrigerant oil prior to fitting
- Seal all parts to be returned at openings to prevent ingress of moisture or foreign bodies
-I)
- Opening refrigerant circuit
without part replacement, as preliminary work to further work
(e.g. engine removal):
Work sequence:
- Draw off Drawing off, Evacuating and Filling A/C System (R 134a) A/C system, then determine drawn-off refrigerant oil quantity
- Carry out main work
- Replace removed refrigerant oil with new refrigerant oil
- Evacuate and fill A/C system Drawing off, Evacuating and Filling A/C System (R 134a)
-II)
- Part replacement and part replacement on account of insidious leak
(minor leak, e.g. hairline crack)
Work sequence:
- Draw off Drawing off, Evacuating and Filling A/C System (R 134a) A/C system, then determine drawn-off refrigerant oil quantity
- Carry out part replacement
- Replace removed refrigerant oil with new refrigerant oil
- Additionally replenish new refrigerant oil in accordance with replaced parts:
- Compressor: refer to Notes on replacing compressor Service and Repair
- Evaporator: 10 ml
- Condenser: 10 ml
- Desiccant insert / desiccant bottle: 30 ml
- Each replaced refrigerant line: 10 ml
- Condenser with integrated dryer: 30 ml
- Safety pressure switch and seals: no additional refrigerant oil
- Evacuate and fill A/C system Drawing off, Evacuating and Filling A/C System (R 134a)
-III)
- Part replacement on account of sudden leak
(major leak, e.g. pipe break due to accident)
Work sequence:
- Draw off Drawing off, Evacuating and Filling A/C System (R 134a) A/C system, then determine drawn-off refrigerant oil quantity
- Carry out part replacement
- Replace removed refrigerant oil with new refrigerant oil
- Additionally replenish 25 ml new refrigerant oil and new refrigerant oil in accordance with replaced parts:
- Compressor: refer to Notes on replacing compressor Service and Repair
- Evaporator: 10 ml
- Condenser: 10 ml
- Desiccant insert / desiccant bottle: 30 ml
- Each replaced refrigerant line: 10 ml
- Condenser with integrated dryer: 30 ml
- Safety pressure switch and seals: no additional refrigerant oil
- Evacuate and fill A/C system Drawing off, Evacuating and Filling A/C System (R 134a)