Refrigerant compressor, remove/install

AR83.55-P-5310MFD

Refrigerant compressor, remove/install

21.02.2020

Engine

260 in model 118, 177, 247

Engine

282 in model 118, 177, 247

except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

1

Electrical connector

3

Bolts

A9

Refrigerant compressor

2

Bolts

4

Bracket

A9/7

Refrigerant compressor with magnetic clutch

Shown on model 177 with engine 282

6

Engine air intake duct

 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

 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

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

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

AH83.30-N-0005-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

 

Remove/install

1

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

2

Discharge air conditioning system.

AR83.30-P-1760MFA

3

Remove engine air intake duct (6) upstream of air filter housing.

4

Remove front right wheel and tire assembly.

Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR40.10-P-1102MFA

5

Remove front section of fender liner in right front fender.

Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR88.10-P-1301MFA

6

Slacken poly-V-belt and remove from belt pulley on refrigerant compressor (A9) or refrigerant compressor with magnetic clutch (A9/7).

Engine 260 in model 118, 177, 247

AR13.22-P-1202MFC

Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR13.22-P-3902-01MFD

Routing diagram for poly-V beltEngine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR13.22-P-3902-02MFD

Routing diagram for poly-V beltEngine 260 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR13.22-P-3902-02NKB

 Installation: Pay attention to poly-V belt routing diagram.

7

Remove bottom engine compartment paneling.

AR61.20-P-1105MFA

 Installation: Only install lower engine compartment paneling after leak test.

8

Release electrical connector(1) and disconnect.

9

Remove bolts (2) of refrigerant lines.

 Engine 260 in model 118, 177, 247Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1002-02F

 Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1002-02G

10

Detach refrigerant lines and seal opened connections using suitable stop plugs.



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Install new sealing rings.
Moisten sealing rings with compressor oil.

 Record plug

*129589009100

11

Unscrew bolts (3) on refrigerant compressor (A9) or refrigerant compressor with magnetic coupling (A9/7), and place holder (4) to one side.

 Installation: Make sure that the bracket (4) and the connected lines are correctly seated.

 Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))Bolt, refrigerant compressor to crankcase/oil pan

*BA83.55-P-1001-02G

 Engine 260 in model 118, 177, 247Bolt, refrigerant compressor to timing case/oil pan

*BA83.55-P-1001-02F

12

Remove refrigerant compressor (A9) or refrigerant compressor with magnetic clutch (A9/7) downwards.

13

Remove receiver drier.

When replacing the desiccant cartridge.

Engine 260 in model 118, 177, 247
with code 2U8 (Alternative refrigerant)
Engine 282 in model 118, 177, 247
with code 2U8 (Alternative refrigerant)
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR83.30-P-6521MFA

 Only replace the desiccant cartridge if one of the following conditions is met:
The vehicle is older than 5 years.
The refrigerant is contaminated (color dark gray to black).
The refrigerant compressor (A9) or refrigerant compressor with magnetic clutch (A9/7) has locked up.
The refrigerant circuit was damaged (e.g. after an accident).

14

Install in the reverse order.

15

Perform commissioning of refrigerant compressor (A9) or refrigerant compressor with magnetic clutch (A9/7).

When replacing the refrigerant compressor (A9) or refrigerant compressor with magnetic clutch (A9/7).



AD00.00-P-2000-06MFA

 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

16

Perform engine test run, checking air conditioning system for proper operation and leaks.

17

Install lower engine compartment lining.

AR61.20-P-1105MFA

 Refrigerant compressor

Number

Designation

Engine 260

BA83.55-P-1001-02F

Bolt, refrigerant compressor to timing case/oil pan

Nm

20

 Refrigerant compressor

Number

Designation

Engine 282

BA83.55-P-1001-02G

Bolt, refrigerant compressor to crankcase/oil pan

M8

Nm

20

 Refrigerant compressor

Number

Designation

Engine 260

BA83.55-P-1002-02F

Bolt, refrigerant line to refrigerant compressor

Nm

20

 Refrigerant compressor

Number

Designation

Engine 282

BA83.55-P-1002-02G

Bolt, refrigerant line to refrigerant compressor

Nm

20