Remove/install oil pump - AR18.10-P-6020CD

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ENGINES 651 in MODELS 166, 172, 204, 207, 212, 218, 221

Fig 1: Oil Pump Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Oil Pump Remove/Install Components (2 Of 2)

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 vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
1	Secure vehicle on vehicle lift	Model 166	AR00.60-P-0100GZ
		Model 172	AR00.60-P-0100T
		Model 204, 207	AR00.60-P-0100CW
		Model 212, 218	AR00.60-P-0100EWS
		Model 221.0/1	AR00.60-P-0100SX
2	Remove timing case cover		AR01.40-P-8000CD
3	Remove vacuum pump		AR43.05-P-1320CD
4.1	Remove oil pan bottom section	Model 172, 204 (except 204.9), 212 except 4MATIC Model 207, 218	AR01.45-P-7555CD
4.2	Remove oil pan	Model 166.0	AR01.45-P-7500GQA
		Model 204, 212 only 4MATIC	AR01.45-P-7500OMD
		Model 221	AR01.45-P-7500SXA
5	Remove screw/bolts (7) for oil suction pipe (8)		*BA18.10-P-1002-01O
6	Detach oil suction pipe (8)	Replace O-ring (9) for oil suction pipe (8). First insert oil suction pipe (8) fully into oil pan (10) and then tighten.
7.1	Set piston on 1st cylinder to ignition top dead center (OT)	Without code (B03) ECO start/stop function Rotate engine at crankshaft using a counterholder in direction of engine rotation until the 0° marking on the belt pulley/vibration damper coincides with the marking on the crankcase.
7.1	Set piston on 1st cylinder to ignition top dead center (OT)	Counterholder	Fig 3
7.2	Set piston on 1st cylinder to ignition top dead center (OT)	With code (B03) ECO start/stop function
		Rotate engine at crankshaft using a counterholder in direction of engine rotation until the 0° marking on the belt pulley/vibration damper coincides with the marking on the crankcase.
8	Remove intermediate gear for engine control between crankshaft and high-pressure pump drive gear		AR05.10-P-7620CD
9	Remove screws/bolts (1)		*BA18.10-P-1001-01O
10	Remove oil pump (10) on oil pump (2) gear	Only install oil pumps (10) from the same manufacturer; check oil pump (10) for ease of movement. If oil pump (10) is dry, fill it with engine oil so that oil is delivered when engine is started. Check adjustment of Lanchester balance shaft (adjust if necessary). See: ↓
10	Remove oil pump (10) on oil pump (2) gear	Check basic position of balancing shaft	AR03.20-P-3637CD
11	Install in the reverse order
12	Check engine oil level, correct if necessary	The engine oil level must lie between "Min" and "Max". Engine damage can occur otherwise.
13	Connect STAR DIAGNOSIS, read out fault memory and erase if required	Stored faults which may be caused by assembly work, test work, removed lines or a simulation, must be processed and erased in fault memories after completing the work.	AD00.00-P-2000-04A
	Checking
14	Check for leaks with engine running

OIL PUMP

Number	Designation				Engine 651
BA18.10-P-1001-01O	Screw/bolt, oil pump to crankcase		Stage 1	Nm	6
BA18.10-P-1001-01O	Screw/bolt, oil pump to crankcase		Stage 2	∠°	90
BA18.10-P-1002-01O	Screw/bolt, oil suction pipe to bearing housing	M6	Stage 1	Nm	6
		M6	Stage 2	∠°	90
		M8	-	Nm	34

Fig 3: Identifying Counterholder (651 589 00 40 00)

Courtesy of MERCEDES-BENZ USA