Remove/install exhaust system

AR49.10-P-7142MFF

Remove/install exhaust system

12.12.2019

Engine

654 in model 118, 177, 247

Modification notes

09.12.2019

Document completely revised.

Shown on model 247 with code U54 (torsion-beam axle)

1

Exhaust system

6

Screw

10

Exhaust aftertreatment unit

2

Electrical connector

7

Bolts

11

Nuts

3

Electrical line

8

Cross strut

12

Bracket

4

Rear underfloor paneling

9

Bolts

B16/27

Temperature sensor downstream of SCR catalytic converter

5

Bolts

Shown on model 247 with code U55 (Multi-link axle)

1

Exhaust system

7

Bolts

10

Exhaust aftertreatment unit

3

Electrical line

8

Cross strut

11

Nuts

5

Bolts

9

Bolts

12

Bracket

6

Screw

 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 burns and injury when working on the diesel particulate filter and health hazard from inhalation of soot particles

Wear protective gloves, safety glasses and respiratory protection.

AS49.20-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

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

 

Remove/install

1

Remove rear underfloor paneling (4).

Engine 654 in model 177, 247
with code U54 (Compound-link axle)

AR61.30-P-1001MFA

2

Remove temperature sensor downstream of SCR catalytic converter (B16/27) from the exhaust system (1).

AR49.20-P-1030MFF

3

Release and disconnect the electrical connector (2).

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

4

Unclip electric line (3).

 Dismantling tool

*000589956300

5

Remove screws (7) and remove cross strut (8).

 Screw, center cross strut (front) to frame floor assembly

*BA61.10-P-1001-01N

6

Support exhaust system (1).



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B



000 588 10 62 00 Support plate

WS26.00-P-3309B

7

Perform repair cut at separating point (T).

Engine 654 in model 177, 247
with code U54 (Compound-link axle)

 Installation: Install pipe clamp on the separating point (T).

 M8

*BA00.10-P-1003-01A

8.1

Remove screw (6) and remove rear section of the exhaust system (1).

Engine 654 in model 177, 247
with code U54 (Compound-link axle)

 Aid of helper required.

 Screw, holder for rear exhaust system suspension to body

*BA49.10-P-1009-02V

8.2

Remove screw (6).

Engine 654 in model 118, 177, 247
with code U55 (Multi-link axle)

 Screw, holder for rear exhaust system suspension to body

*BA49.10-P-1009-02V



Clean

9

Remove combustion and corrosion residues at connecting point (T).

Engine 654 in model 177, 247
with code U54 (Compound-link axle)

10

Remove bolts (5).

 Screw, center cross strut (rear) to frame floor assembly

*BA61.10-P-1002-01N

11

Remove nuts (11).

 Nut, front exhaust system holder to front axle carrier

*BA49.10-P-1006-02V

12

Remove screws (9).

 Bolt, exhaust gas aftertreatment unit to exhaust system at front

*BA49.10-P-1005-02V

13

Lower exhaust system (1) somewhat.



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B



000 588 10 62 00 Support plate

WS26.00-P-3309B

 Lower exhaust system (1) until the bracket (12) and bolts are accessible.

14

Remove bracket (12) from the bolts.

15.1

Remove front section of exhaust system (1).

Engine 654 in model 177, 247
with code U54 (Compound-link axle)



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B



000 588 10 62 00 Support plate

WS26.00-P-3309B

 Installation: Install new gasket.

 Aid of helper required.

15.2

Remove exhaust system(1).

Engine 654 in model 118, 177, 247
with code U55 (Multi-link axle)



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B



000 588 10 62 00 Support plate

WS26.00-P-3309B

 Installation: Install new gasket.

 Aid of helper required.



Clean

16

Remove combustion and corrosion residues from the flange of the exhaust gas aftertreatment unit (10).

17

Install in the reverse order.



Check

18

Check installation position and clearance of exhaust system(1) and correct if necessary.

 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

19

Perform engine test run, check leak tightness of the exhaust system (1), and check engine for proper operation.

 Headless screws: bolts and nuts, coarse-pitch thread

Number

Designation

Model all (4xWD, CAR, smart)

BA00.10-P-1003-01A

M8

8.8

Galvanized

Nm

23

Phosphated

Nm

21

10.9

Galvanized

Nm

32

Phosphated

Nm

29

12.9

Galvanized

Nm

38

Phosphated

Nm

36

 Exhaust system

Number

Designation

Engine 654 in model 118

Engine 654 in model 177

BA49.10-P-1005-02V

Bolt, exhaust gas aftertreatment unit to exhaust system at front

Nm

25

25

 Exhaust system

Number

Designation

Engine 654 in model 247

BA49.10-P-1005-02V

Bolt, exhaust gas aftertreatment unit to exhaust system at front

Nm

25

 Exhaust system

Number

Designation

Engine 654 in model 118

Engine 654 in model 177

BA49.10-P-1006-02V

Nut, front exhaust system holder to front axle carrier

M8

Nm

20

20

 Exhaust system

Number

Designation

Engine 654 in model 247

BA49.10-P-1006-02V

Nut, front exhaust system holder to front axle carrier

M8

Nm

20

 Exhaust system

Number

Designation

Engine 654 in model 118

Engine 654 in model 177

BA49.10-P-1009-02V

Screw, holder for rear exhaust system suspension to body

M8

Nm

20

20

 Exhaust system

Number

Designation

Engine 654 in model 247

BA49.10-P-1009-02V

Screw, holder for rear exhaust system suspension to body

M8

Nm

20

 Frame floor assembly

Number

Designation

Model 118, 177, 247

BA61.10-P-1001-01N

Screw, center cross strut (front) to frame floor assembly

M10

Nm

30

 Frame floor assembly

Number

Designation

Model 118, 177, 247

BA61.10-P-1002-01N

Screw, center cross strut (rear) to frame floor assembly

M10

Nm

30