Detach/attach torque converter on driver - AR27.20-P-0100-01A

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TRANSMISSION 722.9 (except 722.93) For angled screw connection of the torque converter

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

Fig 1: Identifying Wrench Socket (001 589 65 09 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Long Wedge (115 589 03 59 00)

Courtesy of MERCEDES-BENZ USA

Detaching

To unscrew or screw in do not use an impact wrench or compressed-air tool, otherwise the threaded unions in the driven plate will be damaged.

Remove cover (8).
Remove bolts (1 to 4 or 1 to 6) of the torque converter from the driven plate.
Continue turning the engine in the direction of engine rotation using socket on the crankshaft center bolt. If the center bolt is not accessible, continue turning the torque converter using a wide screwdriver.

Fig 3: Removing Bolts Of Torque Converter From Driven Plate
Courtesy of MERCEDES-BENZ USA

Checking
Check driven plate (7) for damage.
The driven plate (7) must be replaced if the threaded unions (7a) are damaged or loose.

Attaching
Mount torque converter (9) on driven plate (7).
Replace bolts (1 to 4 or 1 to 6).

Observe tightening sequence, tightening torque and numerical sequence, otherwise the torque converter (9) or the driven plate (7) will be damaged.

Fig 4: Driven Plate And Threaded Unions
Courtesy of MERCEDES-BENZ USA

Torque converter with 4-x angled threaded connection

Torque converter with 6-x angled threaded connection

Fig 5: Rotating Torque Converter With Threaded Connection
Courtesy of MERCEDES-BENZ USA

TORQUE CONVERTER TIGHTENING SEQUENCE

Tightening sequence	Screw	stage
1	Press the torque converter (9) against the driven plate (7) using a long wedge
2.1	Attach the bolts (1 to 6) and position by hand	Torque converter with 6-x angled threaded connection
2.2	Partially screw in bolts (1 to 4) and position by hand	Torque converter with 4-x angled threaded connection
3.1	Tighten bolts (1, 2) and while tightening press the torque converter (9) against the driven plate (7) with a long wedge	1st stage with torque converter with 6-x angled threaded connection
3.2	Tighten bolts (1) and press the torque converter (9) while tightening up against the driven plate (7) using a long wedge	1st stage with torque converter with 4-x angled threaded connection
4.1	Tighten bolts (3 to 6)	1st stage with torque converter with 6-x angled threaded connection
4.2	Tighten bolts (2 to 4)	1st stage with torque converter with 4-x angled threaded connection
5.1	Tighten bolts (1 to 6)	2nd stage with torque converter with 6-x angled threaded connection
5.2	Tighten bolts (1 to 4)	2nd stage with torque converter with 4-x angled threaded connection
6.1	Tighten bolts (1 to 6)	3rd stage with torque converter with 6-x angled threaded connection
6.2	Tighten bolts (1 to 4)	3rd stage with torque converter with 4-x angled threaded connection