Remove/install radiator unit

AR20.20-P-3871MSC

Remove/install radiator unit

01.08.2019

Engine

256.9 in model 167

1

Radiator unit

2

Bracket

3

Air duct segment

1

Radiator unit

4

Cross strut

5

Coolant lines

6

Fastening bracket

 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 256.9 in model 167
with code 2U8 (Alternative refrigerant)

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.Engine 256.9 in model 167
except code 2U8 (Alternative refrigerant)

AS83.00-Z-0006-01A

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

 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

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Notes on handling refrigerant R1234yf

Motor 256.9 im Typ 167 mit Code 2U8 (Kältemittel alternativ)

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

Motor 256.9 im Typ 167 außer Code 2U8 (Kältemittel alternativ)

AH83.30-N-0003-01A

 

Remove/install

1

Remove upper radiator shutters.

Engine 256.9 in model 167
with code 9U7 (Aerodynamic measure package control code)

AR20.20-P-3882MSC

2

Remove air duct segment (3).

3

Discharge air conditioning system.

AR83.30-P-1760ME

4

Remove fan unit.

AR20.40-P-5050MSC

5

Remove brackets (2).

6

Unclip side air duct segments from radiator unit (1).

7

Drain off coolant.

AR20.00-P-1142MSC

8

Remove coolant hoses from radiator unit (1) and seal with protective covers.

AR20.20-P-7441-01RQ

 Set of protective caps

*001589029100

9

Remove bleed lines from radiator unit (1) and seal with protective covers.

AR20.20-P-7441-01RQ

 Set of protective covers

*001589019100

10

Remove refrigerant lines at condenser and place to one side, seal openings with suitable stop plugs.

 Installation: Install new sealing rings.

 Nut, refrigerant line to condenser

*BA83.30-P-1003-01U

 Record plug

*129589009100

11

Release and disconnect electrical connector of refrigerant pressure sensor (B12/2), unclip line from radiator unit (1).

AR83.30-P-5430OID

12

Remove cross strut(4).

 Nut/screw, lower crossmember to radiator unit mounting support

*BA62.30-P-1006-02I

13

Secure radiator unit (1) against falling down.

14

Remove coolant lines (5) from mounting supports (6).

15

Remove mounting supports (6).

 Installation: Ensure lower elastomer bearings of radiator unit (1) are seated centrally.

 Screw, radiator unit mounting support to front crossmember

*BA62.30-P-1007-02I

16

Release radiator unit (1) and remove downward.

 To prevent damage, remove cooler unit (1) carefully.

 Aid of helper required.

 Radiator unit (1) consists of additional cooler, radiator, condenser and radiator low-temperature circuit.

17

Check radiator unit (1) for damage.

If damage is present



Replace corresponding component.

18

Check lower elastomer bearings of radiator unit (1) for wear and damage.

If damage is present



Replace lower elastomer bearings

19

Install in the reverse order.

 Frond end with reinforcement

Number

Designation

Model 167

BA62.30-P-1006-02I

Nut/screw, lower crossmember to radiator unit mounting support

M10

Nm

55

 Frond end with reinforcement

Number

Designation

Model 167

BA62.30-P-1007-02I

Screw, radiator unit mounting support to front crossmember

M6

Nm

10

 Air conditioning

Number

Designation

Model 167

BA83.30-P-1003-01U

Nut, refrigerant line to condenser

M6

Nm

12