Remove/install balance shaft - AR03.20-P-1000SX

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ENGINES 272 in MODEL 221

Fig 1: Identifying Balance Shaft Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Balance Shaft 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 death when touching components on vehicles with high-voltage on-board electrical system	Do not touch components and open lines of the high-voltage on-board electrical system. Persons who are carriers of electronic implants (e.g. cardiac pacemakers), must not carry out any work on high-voltage on-board electrical systems.	AS54.00-Z-0001-01A
1	Perform disable for the high-voltage on-board electrical system	Model 221.095/195 After completing the work, attach initial startup event log together with the disconnection log to the vehicle file.	AR54.10-P-1150SXH
	Note on the high-voltage on-board electrical system		AH54.00-P-0010-01A
2	Detach torque converter from driver		AR27.20-P-0100-01A
			*BA27.20-P-1002-01C
			Fig 3
			Fig 4
3	Unfasten center bolt on crankshaft vibration damper		AR03.30-P-1600SX
4	Remove engine	Vehicles without 4MATIC	AR01.10-P-2500SX
4	Remove engine	Vehicles with 4MATIC	AR01.10-P-2500SW
5	Detach engine from front axle carrier	Vehicles without 4MATIC	AR01.10-P-2510SX
5	Detach engine from front axle carrier	Vehicles with 4MATIC	AR01.10-P-2510TW
6	Detach transmission from engine	Vehicles without 4MATIC	AR27.10-P-0500SX
6	Detach transmission from engine	Vehicles with 4MATIC	AR27.10-P-0500SYZ
7	Mount engine onto assembly stand
8	Remove oil pan		AR01.45-P-7500SY
9.1	Remove flywheel/drive plate	Except model 221.095/195	AR03.30-P-8001SX
9.2	Remove integrated starter alternator	Model 221.095/195	AR15.40-P-0003SXH
10.1	Remove end cover with crankshaft radial sealing ring	Except model 221.095/195 Replace end cover with crankshaft radial sealing ring.	AR03.20-P-3063SX
10.2	Remove end cover	Model 221.095/195	AR01.40-P-8913SXH
10.2	Remove end cover	Replace the rear crankshaft radial sealing ring after the end cover has been installed.	AR03.20-P-3063SXH
11	Remove timing case cover	Do not damage cylinder head gaskets. Engine damage can occur otherwise.	AR01.40-P-8000SX
12	Check basic position of camshafts		AR05.20-P-6010-01VB
13	Pull tensioning rail Screw/bolts out of right cylinder head and remove tensioning rail downwards		AR01.30-P-5800-04V
			Fig 5
			Fig 6
14	Pull out slide rail pins (3) from left cylinder head		AR01.30-P-5800-04V
			Fig 5
			Fig 6
15	Detach balance weight (4) at the rear of engine from the balance shaft (5)	Fix correctional weight (4) to the cylinder crankcase using a pin or punch. The balance weight (4) has an anti-twist lock and only fits onto the balance shaft (5) in one position only.
15			*BA03.20-P-1002-02A
16	Press timing chain on balance shaft (5) downward and pull balance shaft (5) forwards and out of the crankcase	At a 40° crank angle after ignition TDC the fitted pin (8) is aligned with marking (9) on the crankcase and the notch (6) on the front correctional weight must be aligned with marking (7).
17	Install in the reverse order
	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
18	Carry out an engine test run and check engine for leaks

TORQUE CONVERTER

Number	Designation				Transmission 722.9
BA27.20-P-1002-01C	Bolt, torque converter to drive plate	Straight threaded connection	M8	Nm	42
		Angled threaded connection	Stage 1	Nm	4
			Stage 2	Nm	30
			Stage 3	∠°	90

BALANCE SHAFT

Number	Designation			Engine 272
BA03.20-P-1002-02A	Bolt, correctional weight to balance shaft	Stage 1	Nm	15
		Stage 2	∠°	90
		Length	mm	-

Fig 3: Identifying Wrench Socket (001 589 65 09 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Long Wedge (115 589 03 59 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Impact Extractor (116 589 20 33 00)

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying Threaded Stud (116 589 01 34 00)

Courtesy of MERCEDES-BENZ USA