Replace Front Crankshaft Radial Sealing Ring - AR03.20-P-3000MLJ

Engine 157, 278 in model 166 

Engine 157, 278 in model 292 

Fig 1: Front Crankshaft Radial Sealing Ring Components Location - Engine 157, 278 In Model 166

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove belt pulley/vibration damper (8)		AR03.30-P-1600GQ
2	Press out radial shaft sealing ring (5) from the mounting hole using a screwdriver		AR03.20-P-3000-01MM
		Use a clean rag as a base when pushing out. Leakage can occur otherwise. Do not damage crankshaft (1) and mounting hole.
		Sleeve	Fig 2
	Check
3	Check contact surface of radial shaft sealing ring (5) at hub of belt pulley/vibration damper (8)	In a case of scorch marks and galling ↓ Replace belt pulley/vibration damper (8)
4	Install in the reverse order
5	Check engine oil level; correct if necessary
		Engine 157 in model 166 Engine 157 in model 292	AP18.00-P-0101EWG
		Engine 278 in model 166 Engine 278 in model 292	AP18.00-P-0101EL
	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
6	Carry out an engine test run and check engine for leaktightness

Fig 2: Identifying Sleeve (119 589 01 14 00)

Courtesy of MERCEDES-BENZ USA