Install differential in rear axle housing

AR35.30-D-4815-04S

Install differential in rear axle housing

Rear axle

741.421/422/423/453/454/455 in model 906

Rear axle

741.421/455 in model 900

Test and adjustment values for rear axle drive

Number

Designation

Rear axle 741.421/422/453/454/455

Rear axle 741.423

BE35.30-N-1005-01B

Rear axle differential gear backlash

mm

0,10...0,15

0,10...0,15

 Axle drive

Number

Designation

Rear axle 741.423

Rear axle 741.421/422/453/454/455

BA35.30-N-1002-02A

Bearing bracket of differential housing to axle centerpiece

M10

Stage 1

Nm

30

–

Stage 2

°

60

–

M121.5

Stage 1

Nm

–

40

Stage 2

°

–

60

M162

Nm

–

–

1

 Fasten spreader tool (01) using bolts (4s) to rear axle housing (1).

2

Gradually spread rear axle housing (1) by turning the threaded rod (5) on the  spreader tool (01) only until the differential (6) can be inserted without the use of any force.

 The rear axle housing (1) must not be spread too far apart.
Otherwise, the rear axle housing (1) will be rendered unusable and it will have to be replaced.

3

Insert differential (6) with determined spacer washers (3) and tapered roller bearing shells (2) into rear axle housing (1).

 The chamfered side of the spacer washers (3) must face towards the rear axle housing (1).

4

Insert bearing bracket and position using rubber hammer.

 Observe markings on bearing brackets, to ensure that the original installation position is restored.

5

Tighten screws/bolts of bearing brackets to specified torque  .

6

 Mount dial indicator (04) onto  dial indicator holder and  mount dial indicator holder onto face of rear axle housing (1).

7

Check gear backlash.

 The check pin of the  dial indicator (04) must be at a right angle to the tooth flank on the ring gear (7).

 Determine gear backlash by turning ring gear (7) to and fro.

 Repeat the process at at least 4 tooth flanks equally spaced around the ring gear (7).

8

Adjust gear backlash.

 The gear backlash can be adjusted by using various spacer washers. If a thinner spacer washer is installed on one side, a spacer washer which is thicker by the same amount must be installed on the opposite side so that the preload of the differential housing bearing is retained.

9

Compare measured play with specified gear backlash value and install different spacer washers if necessary.