64 52 521 Replacing air conditioning system compressor (N55)
Special tools required:
WARNING:
Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
- Follow safety instructions. See HANDLING TETRAFLUORETHANE REFRIGERANT R134A and HANDLING REFRIGERANT OIL .
IMPORTANT:
Risk of damage!
Restart engine only when A/C system has been correctly filled.
Read and comply with notes on compressor replacement: see CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) - or - CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN) .
Follow notes for OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .
If Air conditioning is opened for more than 24 hours:
REPLACE CONDENSER FOR AIR CONDITIONING .
Restart engine only when A/C system has been correctly filled.
Read and comply with notes on compressor replacement: see CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) - or - CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN) .
Follow notes for OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .
If Air conditioning is opened for more than 24 hours:
REPLACE CONDENSER FOR AIR CONDITIONING .
Necessary preliminary work:
- Drain the A/C SYSTEM
- Remove DRIVE BELT FOR ALTERNATOR
- Remove left CHARGE AIR DUCT
IMPORTANT:
Seal openings or lines on compressor with special tool 32 1 270
to prevent escape of media and dirt contamination.
Release screw (1) from below.
Tightening torque 64 52 3AZ .
Release screws (4) and remove refrigerant lines (3).
Tightening torque 64 52 1AZ .
Unfasten plug connection (2) and disconnect.
NOTE:
Secure compressor (1) against falling out.
Release screws (5).
Tightening torque 64 52 3AZ .
Feed out compressor (1) in upward direction.
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.
Replacement:
IMPORTANT:
Danger of compressor damage!
Risk of customer complaints due to reduced cooling power of the air conditioning!
Before the installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor!
See CHANGING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) - or - CHANGING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN) .
Risk of customer complaints due to reduced cooling power of the air conditioning!
Before the installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor!
See CHANGING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) - or - CHANGING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN) .
After installation:
- Evacuate and fill the A/C SYSTEM