64 52 521 Replacing A/C Compressor

64 52 521 Replacing A/C Compressor (N54, N55)

Special tools required:







WARNING:
Danger of injury.

Refrigerant circuit is under high pressure.

Follow safety instructions for handling R 134a refrigerant.

Avoid contact with refrigerant and refrigerant fluid.

Follow safety instructions for handling refrigerant fluid.







IMPORTANT:
Risk of damage.

Restart engine only when A/C system has been correctly filled.

Read and comply with notes on replacing compressor.

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 A/C system.







Necessary preliminary tasks:
- Draw off A/C system
- Remove A/C compressor drive belt
- Remove charge-air duct







Disconnect plug connection (1).

Release screws (2) and 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 fouling.







IMPORTANT: Secure compressor (1) against falling out.

Release screws (2) and remove compressor (2) by pulling upwards.

Tightening torque 64 52 3AZ.







Replacement:
Read and comply with notes on replacing compressor.

If necessary, release screws (1) and modify holder (2).







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

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