Remove/install refrigerant compressor

AR83.55-P-5300MEX

Remove/install refrigerant compressor

06.12.2019

Engine

780.993 in model 451.390/392/490/492

1

Screw

5

Cable tie

A9/6

Electric refrigerant compressor

2

Refrigerant intake line

6

Screw

N116/1x1

Refrigerant compressor control unit connector (EAC)

3

Screw

7

Screw

N116/1x2

Refrigerant compressor high-voltage connector (EAC)

4

Refrigerant pressure line

8

Bracket

Shown with the rear drive module removed

3

Screw

5

Cable tie

9

Screw

10

Screw

11

Bracket

12

Screw

13

Screw

A9/6

Electric refrigerant compressor

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

Topical note

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

AH00.00-Z-0300-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on battery

AH54.10-P-0001-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

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

 

Remove/install

1

Drain air conditioning system

AR83.30-P-1760MCC

 Installation: Evacuate air conditioning and then fill it.

2

Disconnect air conditioning service unit



000 588 04 82 00 Air conditioning service unit R134a

WS83.00-P-0031B

3

Remove transmitter key and mains plug

4

Connect Star Diagnosis and enable high voltage on-board electrical system



AD00.00-P-2000-04MCC

 Print out power disable event log and add to the vehicle file.

 Installation: Activate high-voltage system.

5

Remove interior flap above engine

AR88.40-P-1100-03MCC

6

Separate cable tie (5)

 Installation: Replace cable tie (5).

7

Release and disconnect refrigerant compressor control unit connector (EAC) (N116/1x1)

8

Release and disconnect refrigerant compressor HV connector (EAC) (N116/1x2)

9

Fit protective covers on refrigerant compressor HV connector (EAC) (N116/1x2) on line side and component side.


Protect the refrigerant compressor HV connector (EAC) (N116/1x2) against dirt and moisture.
Otherwise, consequential damage may occur on the high voltage on-board electrical system.

 Set of protective caps

*001589029100

10

Remove screw (7) from holder (8)

11

Remove screw/bolt (1) at refrigerant intake line (2)

 Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1003-01V

12

Remove screw/bolt (3) at refrigerant pressure line (4)

 Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1003-01V

13

Remove refrigerant intake line (2) and refrigerant pressure line (4), place to one side and remove sealing rings of refrigerant intake line (2) and refrigerant pressure line (4)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A


Close off refrigerant intake line (2), refrigerant pressure line (4) and electric refrigerant compressor (A9/6) with suitable stop plugs.
Otherwise penetrating dirt and moisture will damage components that are connected to the refrigerant circuit.

 Installation: Replace sealing rings at refrigerant lines (2, 4) and moisten with compressor oil when inserting.

14

Remove screw (9)

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

15

Raise vehicle with vehicle lift

16

Remove screw (10) and remove holder (11)

17

Remove screws (12, 13)

 Bolt, refrigerant compressor to transmission carrier

*BA83.55-P-1010-01V

18

Lower vehicle with vehicle lift

19

Unscrew screw/bolt (6) and remove electric refrigerant compressor (A9/6) from above

 Bolt, refrigerant compressor to transmission carrier

*BA83.55-P-1010-01V

20

Replace dehydrator

AR83.30-P-6525MCC

21

Install in the reverse order

 Refrigerant compressor

Number

Designation

Engine 780.993

BA83.55-P-1003-01V

Bolt, refrigerant line to refrigerant compressor

Nm

20

 Refrigerant compressor

Number

Designation

Engine 780.993

BA83.55-P-1010-01V

Bolt, refrigerant compressor to transmission carrier

Nm

20