Adjust preload of tapered roller bearings

AR35.30-B-4302-01SP

Adjust preload of tapered roller bearings

Rear axle

772.117 in model 979.272/277

with code A59 (Rear axle Meritor MS 06.11x3)

with code A74 (Meritor rear axle self-locking differential)

Rear axle actuation

Number

Designation

Rear axle 772.117 in Vehicle 979.272/277

BE35.30-B-1001-01SP

Satellite box bearings pre-load

mm

0.200

1

Install the  dial gauge holder and the  dial gauge

 The contact point of the dial gauge must be backed on the back surface of the ring gear.

2

Set the  dial gauge on zero

3

Unscrew the adjustment threaded ring, spin the ring gear, and read the indication on the  dial gauge

 A little play will be indicated on the  dial gauge.

4

Move the ring gear to right and left

5

Screw the adjustment threaded ring (1) up to the  dial gauge indicates zero

 Perform the measurement as you tighten the adjustment threaded ring (1) to ensure that the wanted expansion is reached.

6

Spin the ring gear a few times to seat the bearings, return to starting position and observe if there was any pre-load loss

If necessary:



Correct by screwing the threaded ring (1).

7

Adjust to the lowest specified value for pre-load (A), so that after tightening the screw (5) to the final tightening torque (2nd stage), the nominal pre-load is not exceeded.
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