Remove/install crown wheel with differential

AR35.30-B-0464XC

Remove/install crown wheel with differential

24.08.2020

Rear axle

743.457 in model 384.201/223

Modification notes

30.10.2019

Bearing cap the differential assembly housing

BA35.30-B-1010-03H

1

Threaded ring

7

Tapered roller bearing

2

Race ring of the tapered roller bearing

8

Race ring of the tapered roller bearing

3

Locking Allen screw

9

Threaded ring

4

Bolt

10

Mounting

5

Bearing cap

11

Ring gear with differential

6

Tapered roller bearing

12

Tapered group housing



Remove

1

Remove the differential assembly

.

AR35.30-B-0432XB

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

2

Fasten the housing of the differential assembly to a suitable device or bench

 The housing should be secured so as to allow easy, safe access to the tapered group.

3

Loosen the locking Allen screws (3) from the threaded rings (1, 9)


Loose the Allen screws completely from the threaded rings:
To not damage the threads.

4

Remove the threaded rings (1, 9)

 Claw wrench

*055589100700

 Claw wrench

*055589090700

5

Remove the screws (4) and the bearing cap (5)

 If necessary, loosen the bearing cap by slightly tapping with a plastic hammer, since there are dowel pins on the bearing.

6

Remove the race ring (2) of the tapered roller bearing (6)


Do not support tapered roller cage over the housing (12):
in order to avoid damages to the tapered roller bearings (6, 7).

 To do so, slightly lift the crown with the differential (11).

7

Remove the crown with the differential (11)

 Use a suitable lifting device.

 Lifting device

*055589165900

8

Remove the race ring of the tapered roller bearing (8) from the bearing housing (10)



Check

9

Check ring gear with the differential case (11) and the pinion for worn

If necessary:



Replace the complete set.

10

Check the tapered roller bearings (6, 7) and their respective race rings (2, 8) for worn

If necessary:



Replace the tapered roller bearings (6, 7) and their respective race rings (2, 8).

Assemble taper roller bearing in the differential box
.

AR35.30-B-4300-05XB

Detach tapered roller bearings from differential case
.

AR35.30-B-4301-01XB

Attach tapered roller bearing to ring gear
.

AR35.30-B-4301-03RVI

Detach tapered roller bearing from ring gear
.

AR35.30-B-4301-02XB



Install

11

Install the race ring of the tapered roller bearing (8) in the bearing housing (10)

12

Install the threaded ring (9) on the bearing (10)

 Insert the threaded ring until it touches at the race ring of the tapered roller bearing.

13

Install the crown with the differential (11) on the housing (12) bearings

 Installation:
Do not support tapered roller cage over the housing:
in order to avoid damages to the tapered roller bearings (6, 7).

 When assembling, all support points and moving parts should receive a thin layer of SAE 90 lubricant oil for gears.

 Lifting device

*055589165900

14

Install the race ring (2) of the tapered roller bearing (6)

If necessary:



Lift a little the ring gear with the differential case (11).

15

Install the bearing cap (5)

If necessary, slightly tap it with a plastic hammer:



Since there are dowel pins on the bearing.

16

Install the screws (4) and fasten the bearing cap (5)

 .Bearing cap to differential assembly housing

*BA35.30-B-1010-03H

17

Install the threaded ring (1)

 Insert the threaded ring (1) until it touches at the race ring (2) of the tapered roller bearing (6) and, at the same time, spin the ring gear to center and settle the bearings.

 Tapping with a plastic hammer helps settling the bearings.

 There should be sufficient clearance between the gear teeth.

 Claw wrench

*055589100700

 Claw wrench

*055589090700

18

Adjust the clearance between the crown and pinion teeth

.

AR35.30-B-0475XC

.Backlash between the ring gears

*BE35.30-B-1001-01F

 Dial gage

*001589532100

 Dial indicator holder

*363589022100

 Claw wrench

*055589100700

 Claw wrench

*055589090700

19

Check the contact marks between the crown and the pinion

.

AR35.30-B-0475-02XA

20

Adjust the preload of the satellite box bearings

.

AR35.30-B-4302-01XC

.Satellite box bearings pre-load

*BE35.30-B-1002-01F

21

Lock the threaded rings (1, 9) by tightening the Allen screws (3)


To ensure that there is no damage to the threads:
The locking Allen screws must be fitted into the slots of the threaded rings.

22

Install the differential assembly

.

AR35.30-B-0432XB

Rear axle actuation

Number

Designation

Rear axle 743.453/454/457

BE35.30-B-1001-01F

Backlash between the ring gears

mm

0,20...0,28

Rear axle actuation

Number

Designation

Rear axle 743.453/454/457

BE35.30-B-1002-01F

Satellite box bearings pre-load

Before tightening the rings locks

mm

0,10...0,15

After tightening the rings locks

mm

-

 Central actuation with differential

Number

Designation

Rear axle 743.457 in Vehicle 384.2

BA35.30-B-1010-03H

Bearing cap to differential assembly housing

M16x1,5x110

Nm

250

M18X1,5X120

1st stage

Nm

-

2nd stage

° angular

-

M20x1,5

1st stage

Nm

-

2nd stage

° angular

-

M22x1,5

1st stage

Nm

-

2nd stage

° angular

-