Remove/install expansion valve

AR83.30-P-5520MFA

Remove/install expansion valve

13.01.2020

Model

118, 177, 247

Shown on model 177 with engine 282 with code 228

1

Heat shield

4

Nut

6

Refrigerant line

2

Nut

5

Refrigerant line

8

Expansion valve

3

Auxiliary heating valve holder

7

Bolts

8

Expansion valve

 Warning

Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.

No parts of the body or limbs should be within the operating area when the components are moving.

AS00.00-Z-0011-01A

 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

 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

 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

 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

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 118, 177, 247 with engine 260, 282, 608, 654
Model 118, 177, 247.7 with engine 139

AR83.30-P-1760MFA

2

Remove on-board electrical system battery.

AR54.10-P-0005MFA

3

Remove heat shield (1) from firewall.

Model 118, 177, 247 with engine 654

AR49.10-P-0001MFF

Model 118, 177, 247 with engine 608

AR49.10-P-0001MFE

Model 118, 177, 247 with engine 282

AR49.10-P-0001MFD

Model 118, 177, 247 with engine 260

AR49.10-P-0001MFC

Model 118, 177, 247.7 with engine 139

AR49.10-P-0001MFG

4

Remove nut (2) on firewall from auxiliary heating valve holder (3).

Model 118, 177, 247
with code 228 (Additional warm water heating)

5

Remove auxiliary heating valve holder (3) with auxiliary heating valve and place to one side.

Model 118, 177, 247
with code 228 (Additional warm water heating)

6

Remove nut (4) of refrigerant lines  (5, 6).

 Nut, refrigerant line to expansion valve

*BA83.30-P-1001-01T

7

Remove refrigerant lines (5, 6) and seal exposed openings with suitable stop plugs.



BB00.40-P-0362-01A

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

 Record plug

*129589009100

8

Remove bolts_(7).

 Bolt, expansion valve to retaining plate

*BA83.30-P-1009-01T

9

Remove expansion valve (8) and seal exposed openings using suitable stop plugs.



BB00.40-P-0362-01A

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

 Record plug

*129589009100

10

Install in the reverse order.



Check

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 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

11

Perform engine test run, check air conditioning system for proper operation and leak tightness.

Model 118, 177, 247 with engine 260, 282, 608, 654
Model 118, 177, 247.7 with engine 139

AR83.30-P-1760MFA

 Air conditioning

Number

Designation

Model 118

Model 177

BA83.30-P-1001-01T

Nut, refrigerant line to expansion valve

M6

Nm

12

12

 Air conditioning

Number

Designation

Model 247

BA83.30-P-1001-01T

Nut, refrigerant line to expansion valve

M6

Nm

12

 Air conditioning

Number

Designation

Model 118

Model 177

BA83.30-P-1009-01T

Bolt, expansion valve to retaining plate

Nm

7

7

 Air conditioning

Number

Designation

Model 247

BA83.30-P-1009-01T

Bolt, expansion valve to retaining plate

Nm

7