Refrigerant compressor, remove/install

AR83.55-S-5310EA

Refrigerant compressor, remove/install

27.05.2019

Engine

654 in model 447

with code HH9 (Air conditioner, automatic heater control)

Engine

654.9 in model 447

with code HH4 (THERMOTRONIC automatic climate control)

Shown with CODE HZ7 (Semi-automatically controlled air conditioning, TEMPMATIC in rear)

1

Refrigerant compressor

4

Screw

7

Screw

2

Electrical connector

5

Refrigerant line

8

Engine support

3

Refrigerant line

6

Screw

Shown with engine mount removed

1

Refrigerant compressor

3

Refrigerant line

4

Screw

5

Refrigerant line

6

Screw

8

Engine support

9

Bolts

 Warning

Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0006-01A

 Danger

Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0007-01A

Topical note

Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

 

Remove/install

1

Discharge air conditioning system.

Model 447 with code HX1 (R-1234yf refrigerant)

AR83.30-S-1760EF

Model 447 except code HX1 (R-1234yf refrigerant)

AR83.30-S-1760E

2

Remove the alternator.

AR15.40-S-5032EA

3

Remove poly-V-belt from belt pulley of refrigerant compressor (1).

4

Disconnect electrical connection (2).

5

Remove screws (4, 6).

 Bolt, refrigerant line on refrigerant compressor

*BA83.30-N-1012-01A

6

Pull refrigerant lines (3, 5) out of refrigerant compressor (1).



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Replace sealing rings and coat with compressor oil.

7

Seal openings of refrigerant lines (3, 5) and refrigerant compressor (1) with suitable stop plugs.

 Record plug

*129589009100

8

Unscrew screw (7) from left engine carrier (8) by approx. 10 mm.

 Bolt, engine mount to engine support

*BA22.10-N-1001-01EA

9

Remove lower engine compartment paneling.

AR61.20-S-1105E

10

Raise engine from below at left engine carrier (8) using universal major assembly lifter by approx. 10 mm.



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B


Raise or lower the engine carefully.
Otherwise the detachable parts in the engine compartment will be damaged.

 Installation: Lower engine again using universal major assembly lifter and slide universal major assembly lifter to one side.
Ensure correct seating of the engine carrier (8) in the engine mount.

11

Remove screws (9) from refrigerant compressor (1).

 Screw, refrigerant compressor to oil filter housing/major assembly carrier

*BA83.55-N-1001-02EA

12

Lower engine again using universal major assembly lifter and slide universal major assembly lifter to one side.



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B


Lower or raise the engine carefully.
Otherwise the detachable parts in the engine compartment will be damaged.

 Installation: Raise engine from below at left engine carrier (8) using universal major assembly lifter by approx. 10 mm.

13

Lower vehicle.

14

Remove refrigerant compressor (1) upwards out of the engine compartment.

15

Install in the reverse order.

16

Break in refrigerant compressor (1).

If the refrigerant compressor (1) has been replaced.



AD00.00-S-2000-04E

 Menu option: Control unit adaptations.

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

17

Perform engine test run and check refrigerant compressor (1) for proper operation.

 Engine mounts, engine supports

Number

Designation

Engine 654.9 in model 447

BA22.10-N-1001-01EA

Bolt, engine mount to engine support

Nm

61

 Air conditioning

Number

Designation

Model 447 with engine 654

BA83.30-N-1012-01A

Bolt, refrigerant line on refrigerant compressor

Nm

20

 Refrigerant compressor

Number

Designation

Engine 654.9 in model 447

BA83.55-N-1001-02EA

Screw, refrigerant compressor to oil filter housing/major assembly carrier

Nm

20