Adjust preload of tapered roller bearings

AR35.30-B-4302-01GA

Adjust preload of tapered roller bearings

Rear axle

741.710 in model 958

Rear axle

746.209/233 in model 934.2, 938.1, 958

Rear axle

746.213/230 in model 934.2

Rear axle

746.213/230 in model 958.2/4

except code ZC8 (New Final Drive-Top Performance Light)

Rear axle

746.218/225 in model 382.1, 634.0

Rear axle actuation

Number

Designation

Rear axle 741.710. 746.209/213/218/225/230/233/301/314

BE35.30-B-1001-01A

Differential ring gear teethplay

mm

0,22 ... 0,30

Rear axle actuation

Number

Designation

Rear axle 741.710. 746.209/213/218/225/230/233/301/314

BE35.30-B-1002-01A

Satellite box bearings pre-load

New taper roller bearings

mm

0,100 ... 0,200

Used taper roller bearings

mm

-

 Central actuation with differential

Number

Designation

Rear axle 741.710. 746.209/213/218/225/230/233/301/302/314/315

BA35.30-B-1009-03J

Safety locking bolt to the bearing cover

M8

Nm

25

 Central actuation with differential

Number

Designation

Rear axle 741.710. 746.209/213/218/225/230/233/301/302/314/315

BA35.30-B-1010-03J

Differential mounting bearing cap

M20x1.5

1st stage

Nm

200

2nd stage

°

90

1

Install the  measurement device (11) on the differential assembly housing bearings (1).

 Observe the correct supporting of the measurement device (11) onto the bearings. At the installation of the measurement device (11) there must not have pre-load.

 Before adjusting the pre-load of the tapered roller bearing, there must be a previous tightening (1st stage) of the screws (9) of the bearing cap, and a pre-adjustment of the backlash between the teeth of the ring gear and pinion.

2

Gradually   tighten the threaded ring (2) with the  quadrangular assembly pin (7) up to get a   pre-load (A) of the differential case roller bearings on the  dial gauges (10).

 Adjust with the smaller nominal value specified for pre-load of the differential case bearings (A), so that after tightening the screws (9) to the end tightening torque (2nd stage), the nominal value of pre-load is not exceeded.

3

Turn the ring gear a few times to seat the tapered roller bearings and, when returning the ring gear to starting position, note if there has been a pre-load falling. If necessary, correct it by turning the threaded ring (2).

4

Tighten the bearing cap screws (9) to the specified tightening torque (2nd stage)   .

5

Check the   pre-load of the differential case roller bearings again, the gotten value must be within the nominal specified value.

 If the nominal value is exceeded loosen the threaded ring (2) and repeat operations from step 2.

6

Remove the  measurement device (11) and prove the specified value for the   backlash between the ring gear and pinion.

 If the nominal value has not been reached repeat the instructions from the step 2.

7

Install the safety locks of the threaded rings and tighten the screws   .