ar2720d010001us

Detach/attach torque converter on driver

Type ar · topic 27.20 · version 0103 · 2010-11-02

Applies to: TRANSMISSION 722.6 in MODEL 906 with ENGINE 271.951 TRANSMISSION 722.685 in MODEL 906 with ENGINE 272.979

Where it sits

Function group 2 Chassis › 27 Automatic transmission › 27.20 Torque converter — Series 906

EinPAS 17 Drivetrain/axle › 17.15 Clutch › 17.15.31 Hydraulic clutch — Series 906

Also applies to engines/gearboxes: 271 951, 272 979, 722 6**, 722 685

AR27.20-D-0100-01US

Detach/attach torque converter on driver

Torque converter

Number

Designation

Model
906 with
transmission
722.683/684/
685/686

BA27.20-N-1004-01C

Bolt, torque converter to driven plate

Stage 1

Nm

4

Stage 2

Nm

30

Stage 3

°

90

Detach/attach torque converter on driver
Detach/attach torque converter on driver

112 589 03 40 00

Retaining lock

Retaining lock

602 589 00 40 00

In order not to damage the threaded inserts of the drive plate, no impact wrench/driver or compressed air tool may be used when unscrewing or screwing in the bolts.

The retaining lock 602 589 00 40 00 is used on the engine 271.

The retaining lock 112 589 03 40 00 is used on the engine 272.

The work procedure is shown on engine 272.

Detach/attach torque converter on driver

D27.20-1106-06

Unbolt

1 Remove cover (9) on the access opening of the transmission.

2 Turn the engine at the vibration damper in the direction of engine rotation until the two bolts (1, 2) are visible.

3 Insert retaining lock (10) in the left starter opening.

4 Remove bolts (1, 2).

5 Remove retaining lock (10), crank engine in direction of engine rotation and unscrew remaining bolts (1, 2) in the same manner.

The torque converter (8) is fastened with two bolts (1, 2) each to three points offset by 120° to the drive plate (7).

Detach/attach torque converter on driver

D27.20-1107-11

Checking

6 Check threaded inserts (arrows) in the drive plate (7) for damage and loose seat, replace drive plate (7) if necessary.

Shown with engine removed.

Detach/attach torque converter on driver

D27.20-1106-06

Bolting on

The bolts (1, 2) must all be replaced.

7 Align drive plate (7) and torque converter (8) with each other.

8 Use a suitable tool to press the torque converter (8) against the clutch plate (7), screw in two bolts (1, 2) by hand and tighten to 1st stage.

Observe tightening torque.

9 Crank engine further in direction of engine rotation and tighten remaining bolts (1, 2) in same way by hand up to the 1st. stage.

Observe tightening torque.

10 Crank engine further in direction of engine rotation and tighten all bolts (1, 2) to the 2nd. stage.

Use retaining lock (10) when tightening.

11 Crank engine further in direction of engine rotation and tighten all bolts (1, 2) to the 3rd. stage.

Use retaining lock (10) when tightening.

12 Mount cover (9) on the access opening of the transmission.