Disassembling and assembling pinion housing with drive pinion

AR33.30-W-0470C

Disassembling and assembling pinion housing with drive pinion

11.7.07



Disassemble

1

Remove through-drive cover

AR33.30-W-0350MA

2

Remove ring gear with differential

AR33.30-W-0464C

3

Release collar nut (1)

 The locking tab must be sheared off completely as any remnants of the locking tab could damage the thread of the drive pinion (12) when the collar nut (1) is unscrewed.

AR33.30-W-0085-06A

4

Remove counter gear (2)



*748589003100



*000589696300



*001589750900

5

Push drive pinion (12) downwards

 Secure drive pinion (12) against falling down.

6

Remove shim (7) and spacer sleeve (8) from drive pinion (12)

7

Remove outer tapered roller bearing (3) from axle gear housing (6)

8

Remove outer bearing shell (4)

9

Remove oil retainer (5)

10

Remove inner bearing shell (10)

11

Remove shim (9)

12

Remove inner tapered roller bearing (11) on drive pinion (12)



Assemble

 Danger!

Risk of injury to skin and eyes caused by handling hot or glowing objects.

Wear safety gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

13

Heat inner tapered roller bearing (11) to approx. 80 °C and mount all the way onto the shaft

 If necessary, drive home at the inner race using a suitable drift.

14

Install oil retainer (5)

15

Install outer bearing shell (4)

16

Install inner bearing shell (10)

17

Insert drive pinion (12) into axle gear housing (6)

18

Slide spacer sleeve (8) and shim (7) onto shaft

 Secure drive pinion (12) against falling down.

 Danger!

Risk of injury to skin and eyes caused by handling hot or glowing objects.

Wear safety gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

19

Heat up outer tapered roller bearing (3) to approx. 80 °C and push all the way onto shaft

 If necessary, drive home at the inner race using a suitable drift.

20

Install countershaft gear (2)

 Apply a light coat of oil to the teeth on the drive pinion (12). Fit a new collar nut (1) but do not secure yet.



*BA33.30-N-1005-06A



*748589003100



*000589696300



*001589750900

21

Determine installation depth of drive pinion (12)

 In event of any deviation remove the drive pinion (12) and the inner bearing shell (10) again and then install again with the required shim (9).

AR33.30-W-0470-03MA

22

Checking friction torque of tapered roller bearings

 In event of any deviation remove the drive pinion (12) and the inner bearing shell (10) again and then install again with the required fitted washer (7).

AR33.30-W-0470-04MA



*001589750900



*745589012100

23

Secure collar nut (1)

AR33.30-W-0085-03A

24

Install crown wheel with differential

AR33.30-W-0464C

25

Install through-drive cover

AR33.30-W-0350MA

Number

Designation

Front axle 730.116

BA33.30-N-1005-06A

Collar nut, countershaft gear to drive pinion

M451.5

Nm

950 (50)