Contents: Petrol models ↡ Diesel models ↡
Petrol models
Installation details of the air conditioning system compressor on gasoline models
1. Discharge the air conditioning system at a specialized service station.
2. Remove the auxiliary fan assembly (see Section Removal and installation the auxiliary fan assembly).
3. Remove the A/C system capacitor (see Section Removal and installation of the condenser of the K/V system).
4. Remove the cooling system radiator (see Section Removal and installation the cooling system radiator).
5. Remove the accessory drive belt (see Chapter Engine).
6. Disconnect the connector (A9x1) of the A/C compressor wiring.
7. Unscrew the screws (2) and remove the inlet (4) and pressure (3) lines of the refrigeration system - immediately plug the open ends of the lines and connecting fittings to prevent moisture from entering the system, prepare replacement sealing rings (5).
8. Loosen the mounting screws (1) and remove the compressor assembly (A9) of the air conditioning system.
9. Remove the receiver-dryer assembly (see Section Removal and installation the receiver-dryer), - the receiver must be replaced without fail. Do not forget to plug the open ends of the refrigeration lines.
10. Installation is carried out in reverse order
Note: The mounting screws (1) must be in place before installing the compressor.
11. Make sure that the required amount has been added to the system (according to the number of replaced components, see. Specifications) amount of refrigeration oil. Do not forget to lubricate new sealing rings with compressor oil before installation.
12. Start the engine and let it idle for about 4 minutes with the air conditioner set to maximum cooling capacity - the temperature of the air supplied to the passenger compartment through the central air vents on the instrument panel should not fall below +5°C.
13. Check for signs of developing leaks from the refrigeration system.
Diesel models
G270 CDI (M612)
Installation details of the air conditioning system compressor on diesel models with the M612 engine
1. Empty the cooling system; discharge the air conditioning system at a specialized service station.
2. Remove the receiver-dryer assembly (see Section Removal and installation the receiver-dryer), - the receiver must be replaced each time the refrigeration line is opened. Do not forget to plug the open ends of the refrigeration lines.
3. Remove the cooling system radiator (see Section Removal and installation the cooling system radiator).
4. On properly equipped models (code H12), remove the auxiliary heater assembly (see Section Removal and installation of additional heater STH (with appropriate equipment)).
5. Remove the accessory drive belt (see Chapter Engine).
6. Remove the left sleeve of the supercharging system.
7. Disconnect the connector (A9x1) of the A/C compressor wiring.
8. Unscrew the mounting bolts (1 and 3) and remove the inlet (2) and pressure (4) lines of the refrigeration system - immediately plug the open ends of the lines and connecting fittings to prevent moisture from entering the system, prepare replacement sealing rings.
9. Unscrew the mounting bolts (5) and remove the compressor assembly (A9) of the air conditioning system.
10. Installation is carried out in reverse order.
Note: When installing a new compressor, slightly release the pressure in it; the expansion valve, inlet and pressure lines with sealing rings are also replaced with the compressor.
11. Correct the refrigerant level in the compressor, finally check the refrigeration and cooling components (models with code H12) tracts for signs of developing leaks.
G400 CDI (M628)
Installation details of the air conditioning system compressor on diesel models with the M628 engine
1. Open the hood.
2. Empty the cooling system; discharge the air conditioning system at a specialized service station.
3. Remove the receiver-dryer assembly (see Section Removal and installation the receiver-dryer), - the receiver must be replaced each time the refrigeration line is opened. Do not forget to plug the open ends of the refrigeration lines.
4. Remove the A/C system capacitor (see Section Removal and installation of the condenser of the K/V system).
5. On properly equipped models (code H12), remove the auxiliary heater assembly (see Section Removal and installation of additional heater STH (with appropriate equipment)).
6. Remove the accessory drive belt (see Chapter Engine).
7. Remove the left lower air duct of the boost tract.
8. Disconnect the connector (A9x1) of the A/C compressor wiring.
9. Unscrew the screws (1) and remove the inlet (11) and pressure (10) lines of the refrigeration system - immediately plug the open ends of the lines and connecting fittings to prevent moisture from entering the system, prepare replacement sealing rings.
10. Unscrew the mounting bolts (2 and 2a) and, pulling upwards, remove the compressor assembly (A9) of the air conditioning system.
11. Installation is carried out in reverse order.
Note: When installing a new compressor, slightly release the pressure in it; the inlet and pressure lines with sealing rings are also replaced with the compressor.
12. Correct the refrigerant level in the compressor, finally check the refrigeration and cooling components (models with code H12) tracts for signs of developing leaks.