Remove/install alternator belt pulley - AR15.40-P-5710SXI

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ENGINES 642 in MODEL 212, 221

Fig 1: Alternator Belt Pulley Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of lifting platform and position the four support plates at lifting platform support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices	No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards. Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground. Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
1	Remove engine trim panel
2	Remove engine charge air channel upstream of charge air cooler	Model 212	AR09.41-P-8623OGE
2		Model 221	AR09.41-P-8623SXI
3	Remove poly-V belt	Model 212	AR13.20-P-0001OGE
3	Remove poly-V belt	Model 221	AR13.22-P-1202SXI
4	Remove bottom sections of soundproofing
5	Remove cap (4)	Install new cover (4).
6	Use wrench (3) to unbolt belt pulley (1)	Also counterhold alternator shaft (2) with serrated socket or hexagon socket.
		Screwdriver bit	Figure
		Socket wrench	Figure
7	Remove belt pulley (1) downwards	During repairs to the alternator, the belt pulley (1) must always be replaced for a mileage of more than 100.000 km.
7	Remove belt pulley (1) downwards	Collar nut on poly-V belt pulley	*BA15.40-P-1004-01D
8	Install in the reverse order

ALTERNATOR

Number	Designation		ENGINE 642
BA15.40-P-1004-01D	Poly-V belt belt pulley on alternator shaft	Nm	80

Fig 2: Identifying Screwdriver Bit (601 589 00 10 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Socket Wrench (602 589 00 10 00)

Courtesy of MERCEDES-BENZ USA