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

MODEL 166 with ENGINE 157, 276, 278 

MODEL 251 with ENGINE 276 

Shown on engine 276.9 

Fig 1: Identifying Alternator Belt Pulley Remove/Install Components - Shown On Engine 276.9

Courtesy of MERCEDES-BENZ USA

	Risk of injury  . Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating range of the mechanism when moving components.	AS00.00-Z-0009-01A
	Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
	Remove/install
1.1	Remove front engine cover (2) and engine air intake duct (1)	MODEL 166 with ENGINE 157, 276.9, 278 MODEL 251 with ENGINE 276.9
1.2	Remove engine cover and right engine air intake duct upstream of air filter housing	MODEL 166, 251 with ENGINE 276.8
			AR09.10-P-1150GQC
2	Remove right charge air pipe	MODEL 166, 251 with ENGINE 276.8
			AR09.41-P-8620GQC
3	Remove poly-V belt (3)	ENGINE 276.8 in MODEL 166	AR13.20-P-0001GQC
		ENGINE 276.9 in MODEL 166	AR13.20-P-0001GQ
		ENGINE 157, 278 in MODEL 166	AR13.20-P-0001MLJ
		ENGINE 276 in MODEL 251	AR13.20-P-0001RTZ
4	Detach belt pulley (4)	Counterhold alternator shaft using a serrated socket or Torx socket and socket wrench. The belt pulley (4) must always be replaced after a mileage of more than 100.000 km during repair of the alternator (G2).
		Collar nut, connecting belt pulley to alternator	*BA15.40-P-1004-01F
		Socket wrench	Fig 2
5	Install in the reverse order

Fig 2: Identifying Socket Wrench (602 589 00 10 00)

Courtesy of MERCEDES-BENZ USA