Remove/install exhaust aftertreatment unit, replace if necessary

AR49.20-G-3000H

Remove/install exhaust aftertreatment unit, replace if necessary

23.07.2019

Engine

470.9, 471.9, 473.9 in model 800.310

with engine version Euro VI standard

Modification notes

25.10.2018

Additional jobs when replacing the exhaust gas aftertreatment unit (1), added.

Operation steps 14 to 19

1

Exhaust aftertreatment unit

7

Electrical connector

12

Bolts

2

Electrical connector

8

Electrical connector

13

Exhaust tailpipe (fan-shaped)

3

AdBlue® return line

9

Electrical connector

14

Exhaust baffle plate

4

AdBlue® pressure line

10

Wiring harness

19

Exhaust aftertreatment (ACM) control unit

5

Exhaust flex pipe

11

Electrical connector

20

AdBlue® metering device

6

Electrical connector

1

Exhaust aftertreatment unit

15

Heat shield

16

Heat shield

17

Carrier

18

Carrier

A

Unequipped EATU (delivery condition)

B

Equipped EATU

 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

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Differentiating characteristics of exhaust aftertreatment unit

AH49.20-N-0001-04A

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW

 

Remove/install

1

Switch off ignition.

2

Disconnect electrical connection (11) from exhaust aftertreatment (ACM) control unit (19) and remove it.

3

Release wiring harness (10).

4

Remove AdBlue® metering device (20) on the EATU (1) and bind to one side.

 Installation:
If an EATU (1) is replaced and during this operation a Generation I is replaced with a Generation II the following must be observed: to mount the AdBlue® metering device (20), the 4 mm shorter screw/bolts (12) must be used.
Damage will occur to the EATU (1) otherwise.

 Do not disconnect the electrical connection (2), the AdBlue® return line (3) and the AdBlue® pressure line (4).

 Installation: Replace seal and screws (12).

 AdBlue® metering device to EATU

*BA14.40-N-1016-02I

5

Disconnect electrical connections (6, 7, 8, 9).

6

Remove exhaust flex pipe (5).

AR49.10-G-8000H

7

Remove mounting plates over the carriers (17, 18).

 Bolt, mounting plate to exhaust aftertreatment unit carrier

*BA49.10-N-1002-02A

8

Raise exhaust gas aftertreatment unit (1) by about 5 cm, then pull outwards and remove with the aid of a pallet forklift.


Use a suitable base such as a Euro pallet.
The exhaust tailpipe (13) or the EATU (1) can get damaged otherwise.

9

Determine design level of the exhaust gas aftertreatment unit (1).

Only when replacing the exhaust gas aftertreatment unit (1).

 The design of EATUs (1) was changed which lead to the situation for replacement of EATUs (1) that different measures will have to be observed for different generations.

10

Remove heat shields (15, 16).

Only when replacing the exhaust gas aftertreatment unit (1).

11

Remove exhaust baffle plate (14) from the tailpipe (13) and from the exhaust gas aftertreatment unit (1).

Only when replace an exhaust gas aftertreatment unit (1) with an exhaust baffle plate (14).

12

Remove components of the exhaust gas aftertreatment unit (1).

Only when replacing the exhaust gas aftertreatment unit (1).



Exhaust aftertreatment unit, modified

BT49.20-G-0001-01A

AR49.20-G-0001-01H


The specified notes must always be observed.
Otherwise, consequential damage may occur through an improper repair.

 Some assembly parts are reused for replacing the EATU (1). This must be removed and attached together with the new parts to the new EATU (1), see Figure (A, B).

 NOx sensor control unit bracket to exhaust aftertreatment unit

*BA49.10-N-1007-02A

 NOx sensor control unit to bracket

*BA49.10-N-1006-02A

 NOx sensor to exhaust aftertreatment unit

*BA49.10-N-1005-02A

 Exhaust temperature sensor to exhaust aftertreatment unit

*BA49.10-N-1004-02A

 Exhaust pressure sensor to sensor bushing

*BA49.10-N-1003-02A

 Carrier at exhaust aftertreatment unit

*BA49.10-N-1020-02A

13

Install in the reverse order

Additional jobs when replacing the exhaust gas aftertreatment unit (1).

14

Update Vehicle Documentation (VeDoc).

Only when replacing the exhaust gas aftertreatment unit (1).

AR49.20-G-0006H

 VeDoc must always have been updated prior to the following operation steps. For workshops without VeDoc change authorization a form should be attached in the respective work instructions for this purpose.

15

Connect vehicle diagnosis system, start diagnosis, and switch on ignition.

Only when replacing the exhaust gas aftertreatment unit (1).

 See information from body manufacturer.

16

"Re-attach" exhaust gas aftertreatment control unit (ACM (19) or have it connected to the exhaust gas aftertreatment unit (1).

Only when replacing the exhaust gas aftertreatment unit (1).

AR49.20-G-3003-01H



Notes on: Linking exhaust aftertreatment (ACM) control unit and exhaust aftertreatment unit, form

OF49.00-G-1000-03H


The exhaust aftertreatment (ACM) (19) control unit must be "re-hooked" by the central VeDoc team or linked with the EATU (1).
No future "x­actions“ such as software updates will be possible otherwise.

 To do this the filled out form must be scanned in and sent as an attached file together with an XSF ticket to the central VeDoc team.

17

Updating software release in exhaust aftertreatment control unit (ACM) (19)

Only when replacing the exhaust gas aftertreatment unit (1).


If the EATU (1) is replaced and there is replacement during this of one of Generation I by one of Generation II, updating of the software release is essential.
Further workshop visits will be cause otherwise.

18

Perform teach-in process on exhaust aftertreatment control unit (ACM) (19) with the diagnosis system.

Only when replacing the exhaust gas aftertreatment unit (1).

AR49.20-G-3001H


After the EATU (1) has been replaced, the exhaust aftertreatment (ACM) control unit (19) must be taught in appropriately.
Non-teaching in leads to a renewed workshop visit.

19

End diagnosis and remove vehicle diagnosis system.

Only when replacing the exhaust gas aftertreatment unit (1).

 Exhaust aftertreatment, BlueTec®

Number

Designation

Engine 470.9, 471.9, 473.9

BA14.40-N-1016-02I

AdBlue® metering device to EATU

Nm

10

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1002-02A

Bolt, mounting plate to exhaust aftertreatment unit carrier

Nm

225

225

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1003-02A

Exhaust pressure sensor to sensor bushing

Nm

25

25

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1004-02A

Exhaust temperature sensor to exhaust aftertreatment unit

Nm

30

30

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1005-02A

NOx sensor to exhaust aftertreatment unit

Nm

50

50

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1006-02A

NOx sensor control unit to bracket

Nm

12

12

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1007-02A

NOx sensor control unit bracket to exhaust aftertreatment unit

Nm

12

12

 Exhaust system

Number

Designation

Engine 470.9, 471.9

Engine 473.9

BA49.10-N-1020-02A

Carrier at exhaust aftertreatment unit

M14x1.5

Nm

150

150