64 52 521 Replacing A/C Compressor

64 52 521 Replacing Air Conditioning Compressor (N54, N55)

Special tools required:







WARNING:
Danger of injury.
Refrigerant circuit is under high pressure.
Follow safety instructions for handling R134a refrigerant.
Avoid contact with refrigerant and refrigerant fluid.
Follow safety instructions for 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 instructions for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours:
Replace desiccant insert for air conditioning system.







Necessary preliminary work:
- Drawing off, evacuating and filling the air conditioning system is not included in the time value given for this job item
- Remove air conditioning compressor drive belt
- Remove left charge air duct







Release screws (1) and (2).
Remove refrigerant line.
Tightening torque 64 52 1AZ.

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







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







IMPORTANT: Secure compressor against falling.

Disconnect plug connection (1).
Unfasten screws (2).
Release screw (3) and feed out compressor in upward direction.
Tightening torque 64 52 3AZ.







Replacement:
Read and comply with notes on compressor replacement.
If necessary, release screws (1) and modify holder (2).







After installation:
- Evacuate and fill air conditioning system
- Assemble engine

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