64 52 524 Removing and installing/replacing heating and air conditioning system compressor (vehicles with N63 engine and Dynamic Drive)
Special tools required:
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant fluid.
Read and comply with SAFETY INFORMATION .
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 A/C system. See REPLACING DESICCANT INSERT or REPLACING DESICCANT INSERT (CAPACITOR REMOVED) .
Necessary preliminary tasks:
- DRAIN OFF the air conditioning system
- Remove COMPRESSOR DRIVE BELT .
- Lower FRONT AXLE SUPPORT .
Release screw (1).
Unfasten screws (2).
Tightening torque 37 11 2AZ .
Carefully lower active stabilizer (3).
Protect cooling fins (1) as shown with suitable material (2) (e.g. aluminum sheet) for the following work operations.
Release screw (2).
Tightening torque 64 53 7AZ .
Take the refrigerant line (1) off the connecting piece (3).
Release screw (1).
Tightening torque 64 53 3AZ .
Take the refrigerant line (2) of the condenser.
This work step makes swivelling the compressor to remove the refrigerant lines easier.
Unfasten plug connection (1) and disconnect.
Release screw (3) (see next operation).
Unfasten screws (2).
Tightening torque 64 52 3AZ .
Take off holder (4).
Secure compressor (1) against falling out.
Take compressor (1) off the crankcase and turn downwards slightly.
Release screw in the marked area at refrigerant line (2).
Tightening torque 64 52 1AZ .
Remove refrigerant line (2).
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.
Feed out compressor (1) downwards as pictured.
Installation note:
First refrigerant line (2) then compressor (1) feed
Feed in refrigerant line (2) as shown via line (3) to the top.
Secure refrigerant line (2) on compressor.
Tightening torque 64 52 1AZ .
Secure compressor.
Tightening torque 64 52 3AZ .
Replacement:
Release screw (1).
Tightening torque 64 52 1AZ .
Remove refrigerant line (2).
Adjust the amount of REFRIGERANT OIL in the new compressor.
Danger of compressor damage!
Danger of customer complaints due to reduced cooling power of the Air conditioning!
Before the installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor!
The important NOTES must be observed!
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.
After installation:
- EVACUATE AND FILL the air conditioning system