Remove/Install Belt Pulley/Vibration Damper - AR03.30-P-1600GQ

Engine 157, 276, 278 in model 166 

Engine 157, 276, 278 in model 292 

Engine 276 in model 251 

Shown on model 251 with engine 276 

Fig 1: Belt Pulley/Vibration Damper Components Location - Engine 157, 276, 278 In Model 166 (Shown On Model 251 With Engine 276)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove partition wall between wheel wells	Engine 276 in model 251
			AR62.30-P-2400RT
2	Remove windshield wiper system	Engine 276 in model 251
			AR82.30-P-6400RT
3	Remove front upper engine cover	Engine 157, 278 in model 166 Engine 157, 278 in model 292
4	Remove upper engine cover	Engine 276.8 in model 166, 251, 292
5	Remove engine air intake duct upstream of air filter	Engine 157, 278 in model 166 Engine 157, 278 in model 292
6	Remove left and right engine air intake duct upstream of air filter	Engine 276.8 in model 166, 251, 292
			AR09.10-P-1150GQC
7	Remove charge air cooler	Engine 276.8 in model 166, 251, 292
			AR09.41-P-6819GQC
8	Remove poly-V belt	Engine 276.8 in model 166, 292	AR13.22-P-1202GQC
		Engine 157, 278 in model 166 Engine 157, 278 in model 292	AR13.22-P-1202MLJ
		Engine 276.9 in model 166	AR13.20-P-0001GQ
		Engine 276 in model 251	AR13.20-P-0001RTZ
9	Install retaining lock for crankshaft/starter ring gear		AR03.30-P-5000GQ
10	Remove crankshaft center bolt (3)	Replace center bolt for crankshaft (3).
		Center bolt, belt pulley to crankshaft	*BA03.30-P-1001-01M
11	Detach belt pulley/vibration damper (8) from crankshaft	Place belt pulley/vibration damper (8) on crankshaft and rotate to ensure that the feather key (4) of crankshaft is engaged in the groove on the belt pulley/vibration damper (8).
	Check
12	Check contact surface of radial shaft sealing ring (5) at hub of belt pulley/vibration damper (8) for damage	If damage is present ↓ Replace belt pulley/vibration damper (8)
13	Check front crankshaft radial shaft sealing ring (5) for damage	If damage is present ↓ Replace front radial shaft sealing ring (4)
		Engine 276 in model 166, 251, 292	AR03.20-P-3000GQ
		Engine 157, 278 in model 166 Engine 157, 278 in model 292	AR03.20-P-3000MLJ
14	Install in the reverse order
	Check
	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
15	Perform an engine test run and check engine for leaktightness