64 52 523 Removing and Installing/Replacing A/C System Compressor

64 52 523 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 fluid.
Read and comply with safety information:
- Handling R 134a refrigerant
- Handling refrigerant fluid







IMPORTANT:
Risk of damage.
Restart engine only when air conditioning system has been correctly filled.
Read and comply with notes on compressor replacement.
Follow notes for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours:
Replace desiccant insert for heating and air conditioning system.







Necessary preliminary work:
- Drawing off, evacuating and filling the air conditioning system are not included in the time value given for this job item
- 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.







Unfasten plug connection (1) and disconnect.
Release screws (2) and remove refrigerant lines (3).
Tightening torque 64 52 1AZ.

Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.







Release screw (1) at holder for refrigerant lines (2) and pull out, including spacer sleeve.







Release screw (1).
Tightening torque 64 52 3AZ.







NOTE: Shown with clearance for better clarity.

Release screw (1).
Tightening torque 64 52 3AZ.







IMPORTANT: Seal openings or lines on compressor with special tool 32 1 270 to prevent escape of media and dirt contamination.







NOTE: Secure compressor (2) against falling off/down.

Release screw (1).
Tightening torque 64 52 3AZ.
Lift out compressor (2).







After installation:
- Evacuate and fill air conditioning system