64 52 521 Replacing A/C system compressor (N54, N55)
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Special tools required:
WARNING:
Risk of injury!
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R134a refrigerant.
Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant oil. See 64 50... Safety instructions for handling refrigerant oil .
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R134a refrigerant.
Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant oil. See 64 50... Safety instructions for handling refrigerant oil .
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. See 64 52... Instructions for opening and replacing parts in refrigerant circuit
.
If A/C system is opened for more than 24 hours:
Replace desiccant insert for A/C system. See 64 53 517 Replacing desiccant insert for A/C system .
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. See 64 52... Instructions for opening and replacing parts in refrigerant circuit
.
If A/C system is opened for more than 24 hours:
Replace desiccant insert for A/C system. See 64 53 517 Replacing desiccant insert for A/C system .
Necessary preliminary tasks:
- Drawing off, evacuating and filling the A/C system is not included in the time value given for this work operation, see 64 50 009 Drawing off, evacuating and filling A/C system (R 134a) .
- Remove A/C compressor drive belt .
- Remove left charge-air duct
Release screws (1) and (2).
Remove refrigerant line.
Tightening torque 64 52 1AZ , see 64 52 A/C COMPRESSOR .
Installation:
Replace all sealing rings and moisten with refrigerant oil.
IMPORTANT:
Seal openings or lines on compressor with special tool 32 1 270
, see 32 1 270 PLUGS (SET)
to prevent escape of media and fouling.
IMPORTANT:
Secure compressor against falling out.
Disconnect plug connection (1).
Release screws (2).
Release screw (3) and feed out compressor in upward direction.
Tightening torque 64 52 3AZ , see 64 52 A/C COMPRESSOR .
Replacement:
Read and comply with notes on replacing compressor.
If necessary, release screws (1) and modify holder (2).
After installation:
- Evacuate and fill A/C system , see 64 50 009 Drawing off, evacuating and filling A/C system (R 134a) .
- Assemble engine.