64 52 521 Replacing air conditioning compressor (N54, N55)

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Special tools required: 00 9 030, 32 1 270

WARNING:

Risk of injury!

Refrigerant circuit is under high pressure!

Work on the cooling system may only be carried out when it has cooled down.

Follow safety instructions for handling R134a refrigerant . See 64 50... Instructions For Handling Refrigerant R134a and/or 64 50... Safety Instructions For Handling Refrigerant R134A .

Follow safety instructions for handling refrigerant oil . Refer to 64 50... Instructions For Handling Refrigerant Oil (For Refrigerant R134a) .

Avoid contact with refrigerant and refrigerant oil.

Necessary preliminary work: Remove air conditioning compressor drive belt and left charge air duct.

Release screws (1) and (2). Remove refrigerant line. Tightening torque 64 52 1AZ, see COMPRESSOR . Installation note: Replace sealing rings. Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 1: Release Screws (1) And (2)

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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.

Fig 2: Release Screw (3) And Feed Out Compressor In Upward Direction

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Replacement:

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

Fig 3: If Necessary, Release Screws (1) And Modify Holder (2)

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After Replacement:

Evacuate and fill air conditioning system Assemble engine