Refrigerant compressor, remove/install

AR83.55-P-5310MT

Refrigerant compressor, remove/install

21.08.2019

Engine

133.980 in model 117, 156, 176

Engine

270 in model 117, 156, 176, 242, 246.2

Modification notes

05.10.2016

Safety note added

AS83.00-Z-0006-01A

AS83.00-Z-0006-01A

20.09.2016

Initial startup added

Operation step 1

AD00.00-P-2000-04A

20.09.2016

Safety note added

AS83.00-Z-0007-01A

Shown on ENGINE 270

1

Screw

2

Screw

3

Screw

4

Electrical connector

5

Screw

6

High pressure pipe

7

Screw

8

Low pressure pipe

10

Screw

13

Poly-V-belt

A9

Refrigerant compressor

 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.Engine 133.980 in model 117, 156, 176
except code 2U8 (Alternative refrigerant)
Engine 270 in model 117, 156, 176, 242, 246.2
except code 2U8 (Alternative refrigerant)

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.Engine 133.980 in model 117, 156, 176
with code 2U8 (Alternative refrigerant)
Engine 270 in model 117, 156, 176, 242, 246.2
with code 2U8 (Alternative refrigerant)

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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Notes on handling refrigerant R1234yf

Engine 133.980 in model 117, 156, 176
with code 2U8 (Alternative refrigerant)
Engine 270 in model 117, 156, 176, 242, 246.2
with code 2U8 (Alternative refrigerant)

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

Engine 133.980 in model 117, 156, 176
except code 2U8 (Alternative refrigerant)
Engine 270 in model 117, 156, 176, 242, 246.2
except code 2U8 (Alternative refrigerant)

AH83.30-N-0003-01A

 

Remove/install

1

Perform initial startup of refrigerant compressor (A9)

When installing new refrigerant compressor (A9).



AD00.00-P-2000-04A

2

Drain air conditioning system

AR83.30-P-1760NKB

3

Loosen poly-V-belt (13), remove and check components of belt drive

Engine 133.980 in model 117, 156, 176

AR13.20-P-0001MTA

Engine 270 in model 117, 156, 176, 242, 246.2

AR13.20-P-0001MT

4

Remove screw/bolt (10) at low-pressure line (8)

Engine 270 in model 117, 156, 176, 242, 246.2

5

Remove bolt (5) and remove high pressure line (6) at refrigerant compressor (A9)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: The sealing ring of high-pressure line (6) must be replaced and moistened with compressor oil.

 Engine 133.980 in model 117, 156, 176Screw/bolt, refrigerant lines to A/C compressor

*BA83.55-P-1002-01BA

 Engine 270 in model 117, 156, 176, 242, 246.2Bolt, high-pressure line to refrigerant compressor

*BA83.30-P-1009-01G

6

Seal opening of high-pressure line (6) and refrigerant compressor (A9) using suitable stop plugs


The openings of the high-pressure line (6) and refrigerant compressor (A9) must be sealed.
Otherwise, penetrating dirt and moisture will damage the air conditioning system.

 Record plug

*129589009100

7

Release and disconnect electrical connector (4) of refrigerant compressor (A9)

8

Remove screws/bolts (1, 2, 3)


Secure refrigerant compressor (A9) tension-free to prevent it from falling down.
In order to prevent damage.

 Engine 133.980 in model 117, 156, 176Screw/bolt, A/C compressor to bracket

*BA83.55-P-1001-01BA

 Engine 270 in model 117, 156, 176, 242, 246.2Screw/bolt, refrigerant compressor to engine

*BA83.55-P-1001-01Z

9

Remove bolt (7) and remove low-pressure line (8) at refrigerant compressor (A9)



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: The sealing ring of low-pressure line (8) must be replaced and moistened with compressor oil.

 Engine 133.980 in model 117, 156, 176Screw/bolt, refrigerant lines to A/C compressor

*BA83.55-P-1002-01BA

 Engine 270 in model 117, 156, 176, 242, 246.2Bolt, low-pressure line to refrigerant compressor

*BA83.30-P-1008-01G

10

Seal openings of low-pressure line (8) and refrigerant compressor (A9) using suitable stop plugs


The openings of the low-pressure line (8) and refrigerant compressor (A9) must be sealed.
Otherwise, penetrating dirt and moisture will damage the air conditioning system.

 Record plug

*129589009100

11

Remove refrigerant compressor (A9) toward bottom out of engine compartment

12

Install new receiver drier

Only remove and replace the desiccant cartridge if one of the following conditions is fulfilled: The vehicle is more than 5 years old, the refrigerant is contaminated (color: dark gray to black), the refrigerant compressor (A9) has blocked or the refrigerant circuit was damaged (e. g. after an accident).

AR83.30-P-6521NKB

13

Install in the reverse order



Check

14

Evacuate air conditioning system, refill it, and then check the system to make sure that it functions correctly and does not leak

AR83.30-P-1760NKB

 Air conditioning

Number

Designation

Model 117

Model 156

BA83.30-P-1008-01G

Bolt, low-pressure line to refrigerant compressor

Nm

20

20

 Air conditioning

Number

Designation

Model 176, 246

Model 242

BA83.30-P-1008-01G

Bolt, low-pressure line to refrigerant compressor

Nm

20

20

 Air conditioning

Number

Designation

Model 117

Model 156

BA83.30-P-1009-01G

Bolt, high-pressure line to refrigerant compressor

Stage 1

Nm

5

5

Stage 2

Nm

20

20

 Air conditioning

Number

Designation

Model 176, 246

Model 242

BA83.30-P-1009-01G

Bolt, high-pressure line to refrigerant compressor

Stage 1

Nm

5

5

Stage 2

Nm

20

20

 Refrigerant compressor

Number

Designation

Engine 133

BA83.55-P-1001-01BA

Screw/bolt, A/C compressor to bracket

Nm

20

 Refrigerant compressor

Number

Designation

Engine 270

BA83.55-P-1001-01Z

Screw/bolt, refrigerant compressor to engine

Nm

20

 Refrigerant compressor

Number

Designation

Engine 133

BA83.55-P-1002-01BA

Screw/bolt, refrigerant lines to A/C compressor

Nm

20