Remove/install axle drive module of front axle with tubular frame

AR08.10-S-0008F

Remove/install axle drive module of front axle with tubular frame

06.03.2020

Engine

780.701 in model 447

Shown with CODE HH9 (Semi-automatically regulated air conditioning, TEMPMATIC)

2

High-voltage plug

6

Vacuum line

3

Charger for high-voltage battery

7

Refrigerant line

4

Electrical connector

8

Refrigerant line

5

Electrical wiring harnesses

9

Coolant hoses

1

Axle drive module

13

Equipotential bonding line

10

Electrical connectors

14

Nut

11

Bracket

15

Positive line

12

Nut

16

Electrical connectors

17

High-voltage lines

22

Line bracket

18

Bracket

23

Nut

19

High-voltage plug

24

Equipotential bonding line

20

Bracket

25

Clutches

21

Electrical wiring harness

26

Screw

27

Engine suspension lugs

28

Tubular frame

29

Lifting gear

30

Nuts

33

Bolts

31

Bracket

34

Screw

32

Fuse box

35

Bolts

36

Carrier

37

Electrical wiring harness

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

 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

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

AH00.00-Z-0300-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on battery

AH54.10-P-0001-01A

 

Remove/install

1

Perform commissioning of axle drive module (1) with vehicle diagnosis system.

When replacing axle drive module (1).



AD00.00-S-2000-04E

2

Remove radiator unit.

AR08.50-S-0120F

3

Perform power disconnect of high-voltage on-board electrical system.

AR47.70-S-1000F

4

Detach ground line of on-board electrical system battery.

AR54.10-S-0003E

5

Remove hood.

AR88.40-S-3000E

6

Remove air/water duct.

AR83.25-S-1410E

7

Remove cross member.

AR62.30-S-1360E

8

Secure vehicle on vehicle lift.

AR00.60-S-0100E

9

Remove left front axle shaft.

AR33.30-S-0621F

10

Remove right front axle shaft.

AR33.30-S-0622F

11

Remove refrigerant line (7) from rear separating point.

Engine 780.701 in model 447
with code HH9 (Air conditioner, automatic heater control)

AR83.30-S-7836F

12

Remove refrigerant line (8) from separating point.

Engine 780.701 in model 447
with code HH9 (Air conditioner, automatic heater control)

AR83.30-S-7841FA

13

Disconnect high-voltage plug (2) from charger for high-voltage battery (3).

14

Release and disconnect electrical connector (4).

15

Unclip electrical wiring harnesses (5) (arrows A).

 Clip remover

*452589016300

16

Disconnect vacuum line (6) from brake booster.

17

Remove coolant hoses (9) from connection fittings and seal all openings with suitable stop plugs.

 Record plug

*129589009100

 Hose clamp pliers

*454589003700

18

Unclip electrical connectors (10) from bracket (11).

 Clip remover

*452589016300

19

Release and disconnect electrical connectors (10).

20

Remove nut (12) and disconnect equipotential bonding line (13).

Check ground lines for high-voltage on-board electrical system potential equalization

AR47.70-S-1020-01F

 Installation: Check equipotential bonding line (13) for DC/DC converter.

 Nut, potential equalization ground line to body

*BA47.70-N-1013-02F

 Nut, potential equalization ground line to bracket for charger, DC/DC converter, heater

*BA47.70-N-1007-02F

21

Remove nut (14) and disconnect positive line (15).

 Nut, positive line to bolt for fuse and relay module in engine compartment

*BA54.15-N-1001-02F

22

Release and disconnect electrical connectors (16).

23

Unclip high voltage lines (17) from bracket (18) (arrows C).

24

Remove high-voltage plugs (19) and bracket (20) from high-voltage power distributor at underbody.

AR47.70-S-0004F

25

Unclip electrical wiring harness (21) at line bracket (22) from bracket (20).

 Clip remover

*452589016300

26

Remove nut (23) and disconnect equipotential bonding line (24) from body.

Check ground lines for high-voltage on-board electrical system potential equalization

AR47.70-S-1020-01F

 Installation: Check equipotential bonding line (24) for electric motor.

 Nut, potential equalization ground line to underbody

*BA47.70-N-1004-02F

 Screw, potential equalization ground line to electric motor

*BA47.70-N-1001-02F

27

Unclip equipotential bonding line (24) at line bracket (arrow B).

28

Disconnect coolant hoses at couplings (25) and seal with suitable stop plugs.

AR20.20-P-7441-01RQ

 Record plug

*129589009100

29

Remove screw (26).

 Screw, engine stabilizer mount at bottom to axle drive module

*BA22.10-N-1002-01FA

30

Attach a suitable lifting gear (29) as shown to left side of vehicle at tubular frame (28) of axle drive module (1).


Ensure that lifting gear (29) is routed behind high voltage lines (arrow D).
High voltage lines can otherwise be damaged.


Do not use engine lifting lug on left side of vehicle.
Heater coolant circuit for vehicle interior can otherwise be damaged.

31

Thread lifting gear (29) as shown through engine lifting lugs (27) on right side of vehicle.

32

Attach lifting gear (29) to engine hoist and slightly lift axle drive module (1) at tubular frame (28).

 Only lift axle drive module (1) at tubular frame (28) to extent that engine mounts are relieved.

33

Remove nuts (30).

34

Release fuse box (32) with bracket (31) and connected electric lines from body and place to one side.

35

Remove bolts (33).

 Screw/bolt, engine mount bracket to body

*BA22.10-N-1003-01FA

36

Remove screw (34).

 Screw, engine stabilizer mount at top to engine carrier

*BA22.10-N-1005-01FA

37

Remove bolts (35).

 Bolt, carrier to body

*BA22.10-N-1004-01FA

38

Lift axle drive module (1) at tubular frame (28) and remove from engine compartment towards front.


Take into account high voltage lines (17) and high-voltage plugs (19).
High voltage lines (17), high-voltage plugs (19) as well as adjacent component parts can otherwise be damaged.

 Installation:
Ensure carrier (36) is correctly positioned at longitudinal member front section (arrow E).
Electrical wiring harness (37) can otherwise be damaged.

 Aid of helper required.

39

Install in the reverse order.

 Engine mounts, engine supports

Number

Designation

Engine 780.701/702 in model 447

BA22.10-N-1002-01FA

Screw, engine stabilizer mount at bottom to axle drive module

Stage 1

Nm

180

Stage 2

°

90

 Engine mounts, engine supports

Number

Designation

Engine 780.701/702 in model 447

BA22.10-N-1003-01FA

Screw/bolt, engine mount bracket to body

Nm

58

 Engine mounts, engine supports

Number

Designation

Engine 780.701/702 in model 447

BA22.10-N-1004-01FA

Bolt, carrier to body

Nm

58

 Engine mounts, engine supports

Number

Designation

Engine 780.701/702 in model 447

BA22.10-N-1005-01FA

Screw, engine stabilizer mount at top to engine carrier

Nm

106

 High-voltage on-board electrical system potential equalization ground lines

Number

Designation

Engine 780.701 in model 447

BA47.70-N-1001-02F

Screw, potential equalization ground line to electric motor

Nm

16

 High-voltage on-board electrical system potential equalization ground lines

Number

Designation

Engine 780.701 in model 447

BA47.70-N-1004-02F

Nut, potential equalization ground line to underbody

Nm

16

 High-voltage on-board electrical system potential equalization ground lines

Number

Designation

Engine 780.701 in model 447

BA47.70-N-1007-02F

Nut, potential equalization ground line to bracket for charger, DC/DC converter, heater

Nm

16

 High-voltage on-board electrical system potential equalization ground lines

Number

Designation

Engine 780.701 in model 447

BA47.70-N-1013-02F

Nut, potential equalization ground line to body

Nm

16

 Fuse and relay module

Number

Designation

Model 447 with engine 780.701/702

BA54.15-N-1001-02F

Nut, positive line to bolt for fuse and relay module in engine compartment

Nm

10