ar3530b0464i

Remove/install crown wheel with differential

Type ar · topic 35.30 · version 0200 · 2020-09-12

Applies to: Rear axle 746.231/305 in model 934.24, 938.14, 958.4

Where it sits

Function group 2 Chassis › 35 Rear axle › 35.30 Final drive, drive shafts — Series 934 (models 24*) · Series 938 (models 14*) · Series 958 (models 4**)

EinPAS 17 Drivetrain/axle › 17.51 Rear axle › 17.51.65 Rear axle differential/axle through-drive — Series 934 (models 24*) · Series 938 (models 14*) · Series 958 (models 4**)

Also applies to engines/gearboxes: 746 231, 746 305

AR35.30-B-0464I

Remove/install crown wheel with differential

04.09.2020

Rear axle

746.231/305 in model 934.24, 938.14, 958.4

Modification notes

21.08.2020

Safety plate on differential support cover

BA35.30-B-1012-02A

Remove/install crown wheel with differential

1

Bolt (safety lock)

2

Safety lock

3

Bolt (bearing cap)

4

Bearing cap

6

Sprocket

7

Outer raceway (tapered roller bearing)

8

Threaded ring

9

Differential set case

10

Outer raceway (tapered roller bearing)

11

Threaded ring

W35.30-1139-06

Remove

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

1

Remove the bolts (1) and remove the safety locks (2)

2

Remove the interwheel differential lock

AR35.40-B-0650B

3

Remove the threaded rings (8, 11) and remove the outer races (7, 10) of the tapered roller bearings


Immobilize the differential set using the chisel to remove the threaded rings (8, 11).
This aims at avoiding damages to the tapered roller bearings on the differential set case (9).

Square drift

*312589040700

4

Remove the bolts (3) and remove the bearing cap (4)

5

Remove the ring gear (6) with the differential set

Check

6

Check the ring gear (6) and the drive pinion for damages and wear

If there is damage and wear on the ring gear and on the drive pinion:

Replace the ring gear and the drive pinion.

7

Check the tapered roller bearings of the differential set

If necessary, replace the tapered roller bearings of the differential set.

Removing the taper roller bearing from the toothed crown

AR35.30-B-4301-02GA

Installing taper roller bearing in the crown wheel

AR35.30-B-4301-03RVI

Detach tapered roller bearings from differential case

AR35.30-B-4301-01GA

Assemble the tapered roller bearing in the differential case

AR35.30-B-4300-05GA

Install

8

Install the ring gear (6) with the differential set in differential set case (9)


When installing the ring gear (6) with the differential set in the differential set case (9), all support points and moving parts should receive a thin layer of lubrication oil for gears.
This will ensure that there is on the damage to the differential set and to the tapered roller bearings during the adjustment procedure.

Lubricating oil for transfer case and drive axle, DB supply specification 6630.00 - SAE 85W90 and 90

*BR00.45-Z-1112-06A

9

Install the bearing cap (4) and install the bolts (3)

10

Insert the outer race (7, 10) of the tapered roller bearing

11

Install the threaded rings (8, 11) and tighten the bolts (3) on the bearing cap (4) to the specified tightening torque (1st step)

The threaded rings (8, 11) must be manually installed until they touch the outer races (7, 10) of the tapered roller bearing.
Remove the immobilizer from the differential set case with the chisel.

Differential mounting bearing cap

*BA35.30-B-1010-03J

12

Adjust the tooth flank clearance on the ring gear (6)

AR35.30-B-0464-02A

Tooth flank clearance

*BE35.30-B-1008-01A

Square drift

*312589040700

Dial gage

*001589532100

Dial indicator holder

*363589022100

13

Determine the differential set mounting measure

AR35.30-B-0475-01D

14

Adjusting the preload of tapered roller bearings

AR35.30-B-4302-01D

15

Install the safety locks (2) and tighten the bolts (1)

Safety plate on differential support cover

*BA35.30-B-1012-02A

Check

16

Check the contact marks between the ring gear (6) and the drive pinion

AR35.30-B-0475-02XA

Contact paint (permanent, violet - no. 330)

*BR00.45-Z-1059-07A

17

Install the interwheel differential lock

AR35.40-B-0650B

18

Install the differential assembly

AR35.30-B-0432G

Rear axle actuation

Number

Designation

Rear axles 746.231/302/305/315

BE35.30-B-1008-01A

Tooth flank clearance

mm

0,22 ... 0,30

Central actuation with differential

Number

Designation

Rear axle 746.231/305

BA35.30-B-1010-03J

Differential mounting bearing cap

M20x1.5

1st stage

Nm

200

2nd stage

°

90

Transmission to rear axle

Number

Designation

Rear axle 746.231/305

BA35.30-B-1012-02A

Safety plate on differential support cover

M8

Nm

25

Remove/install crown wheel with differential
Remove/install crown wheel with differential
Remove/install crown wheel with differential

001 589 53 21 00

Dial gage

363 589 02 21 00

Dial indicator holder

312 589 04 07 00

Square drift

Repair materials

Number

Designation

Order number

BR00.45-Z-1059-07A

Contact paint (permanent, violet - no. 330)

Acrilex Ref. 014123

BR00.45-Z-1112-06A

Lubricating oil for transfer case and drive axle, DB supply specification 6630.00 - SAE 85W90 and 90

Use corresponding commercially available repair materials.

Referenced documents