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

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 1: Identifying Torque Converter Bolts Location

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.

Fig 2: Identifying Driven Plate Threaded Unions

Courtesy of MERCEDES-BENZ USA

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 3: Identifying Torque Converter Angled Threaded Connection

Courtesy of MERCEDES-BENZ USA

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

TORQUE CONVERTER TIGHTENING TORQUES

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°