Remove/install alternator

AR15.40-P-5032MFC

Remove/install alternator

31.10.2019

Engine

260 in model 118, 177, 247

Shown on model 177 with engine 260 without code M016 (performance-enhanced engine)

1

Engine air intake duct upstream of air filter

7

Heat shield

12

Nut

2

Charge air hose

8

Bolts

13

Coolant hose

3

Refrigerant line

9

Cap

14

Nut

4

Engine air intake duct downstream of air filter

10

Electrical wiring harness

15

Screw

5

Poly-V-belt

11

Electrical connector

G2

Alternator

6

Bolts

 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

 Danger

Risk of fire/risk of explosion due to short circuit and escaping oxyhydrogen gas. Risk of (burn) injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte/mist, short circuit and arcing. Risk of poisoning caused by swallowing battery electrolyte or absorption of lead through the skin or body orifices. Risk of death due to voltage U >= 30 V AC and U >= 60 V DC.

No fires, sparks, open flames, or smoking. Wear acid-resistant gloves, clothing, and glasses. Pour battery acid only into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

 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 explosion caused by welding or soldering work on closed air conditioning system. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant.

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 areas. Carry out repair work on the air conditioning system circuit only after the system has been drained.

AS83.00-Z-0001-01A

 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

 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

Notes on coolant

AH20.00-N-2080-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

 

Remove/install

1

Disconnect ground line from the starter battery (G1).

AR54.10-P-0003MFA

2

Discharge air conditioning system.

AR83.30-P-1760MFA

3

Remove engine air intake duct upstream of air filter (1).

4

Remove engine air intake duct downstream of air filter (4).

AR09.10-P-8130MFC

5

Remove right charge air hose (2).

Engine 260 in model 118, 177, 247
except code M016 (Uprated engine)

Open and close coupling

AR09.41-P-1311-01AL

6

Remove fan unit.

AR20.40-P-5050MFD

7

Insert cooler protective plate.



WF58.50-P-0110-01A

8

Remove screws (8) and remove side heat shield (7) at exhaust gas turbocharger.

 Bolt, heat shield to exhaust gas turbocharger

*BA09.40-P-1009-02G

9

Unscrew nut (14), remove refrigerant line (3) and seal exposed openings with suitable stop plugs.

 Nut, refrigerant line connecting point

*BA83.30-P-1002-01T

 Record plug

*129589009100

10

Drain off coolant.

AR20.00-P-1142MFC

11

Remove the poly-V-belt(5).

AR13.22-P-1202MFC

12

Remove coolant hose (13) at water pump and cooler, place to one side and seal.

 Hose clamp pliers

*454589003700

13

Remove screw (15) at refrigerant compressor.

 Bolt, refrigerant line to refrigerant compressor

*BA83.55-P-1002-02F

14

Remove refrigerant line (3) and seal exposed openings with suitable stop plugs.

 Installation: Replace seals.
Wet seals with compressor oil.

 Record plug

*129589009100

15

Release and disconnect electrical connector (11) at alternator (G2).

16

Remove cover (9) from circuit 30 at alternator (G2).

17

Unscrew nut (12) from circuit 30 at alternator (G2) and place electrical wiring harness (10) to one side.

 Nut, circuit B+ to alternator

*BA15.40-P-1002-01W

18

Remove screws (6) at alternator (G2).

Tighten alternator screws/bolts

AR15.40-P-0002-01MFA

 Installation: Observe tightening procedure.

 Screw, alternator to timing case/major assembly carrier

*BA15.40-P-1001-01W

19

Carefully remove alternator (G2) upwards.

20

Install in the reverse order.

 Turbocharger

Number

Designation

Engine 260

BA09.40-P-1009-02G

Bolt, heat shield to exhaust gas turbocharger

Nm

8

 Alternator

Number

Designation

Engine 260

BA15.40-P-1001-01W

Screw, alternator to timing case/major assembly carrier

Stage 1

Nm

8

Stage 2

Nm

20

 Alternator

Number

Designation

Engine 260

BA15.40-P-1002-01W

Nut, circuit B+ to alternator

Nm

16

 Air conditioning

Number

Designation

Model 118

Model 177

BA83.30-P-1002-01T

Nut, refrigerant line connecting point

M6

Nm

12

12

M8

Nm

20

20

 Air conditioning

Number

Designation

Model 247

BA83.30-P-1002-01T

Nut, refrigerant line connecting point

M6

Nm

12

M8

Nm

20

 Refrigerant compressor

Number

Designation

Engine 260

BA83.55-P-1002-02F

Bolt, refrigerant line to refrigerant compressor

Nm

20