Remove/install drive pinion

AR35.30-B-0458MX

Remove/install drive pinion

02.01.2020

Rear axle

772.030/031/032/034

1

Nut

2

Plain washer

3

Coupling flange

4

Deflector

5

Radial seal

6

Outer tapered roller bearing

7

Outer tapered roller bearing race

8

Differential housing

9

Spacer

10

Wedges

11

Inner tapered roller bearing race

12

Inner tapered roller bearing

13

Pinion



Remove

1

Remove the differential assembly

.

AR35.30-B-0432MX

 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

Remove the crown with the differential assembly

.

AR35.30-B-0464MX

3

Immobilize the coupling flange (3) and remove the nut (1) of the pinion (13)

 Retainer wrench

*717589003100

4

Remove the coupling flange (3)

5

Remove the drive pinion (13)

 For the pinion (13) removal, reinstall the nut (1) of the pinion (13) in order to protect the pinion thread (13).
Tap the pinion shaft (13) with the aid of a hammer and a brass billet until it is removed.

6

Remove the deflector (4), the radial seal (5), the external tapered roller bearing (6) and the outer tapered roller bearing race (7)

7

Remove the differential housing (8), the external tapered roller bearing (6), the spacer (9), the shims (10) and the inner tapered roller bearing (12)

8

Remove the outer races of the tapered roller bearings (5, 9) from the differential housing (6)

 Use a hammer and a brass billet.



Check

9

Check the tapered roller bearings (6, 12) for wear or damage

If necessary:



Replace the tapered roller bearings (6, 12).

.

AR35.30-B-4300-01MX



Install

10

Install the inner tapered roller bearing (12) on the pinion (13)

.

AR35.30-B-4300-01MX

11

Install the spacer (9), the shims (10) and the inner tapered roller bearing race (11) at the differential housing (8)

12

Install the outer tapered roller bearing race (7) at the differential housing (8)

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

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

AS00.00-Z-0002-01A

13

Install the pinion (13), the outer tapered roller bearing (6) at the differential housing (8)

 To install the tapered roller bearing (6), heat it up to approximately 80°C.

14

Install the radial seal (5)

 Install a new radial seal (5).

 Apply a sealing agent on the surface of the radial seal (5).

Sealant

*BR00.45-Z-1112-01A

15

Install the coupling flange (3), the plain washer (2) and the nut (1) of the pinion (13)

 .Nut of the drive pinion

*BA35.31-B-1003-02MX

16

Install the crown on the differential assembly

.

AR35.30-B-0464MX

17

Install the differential assembly

.

AR35.30-B-0432MX

 Differential box

Number

Designation

Rear axle 772.030/031/032/034

BA35.31-B-1003-02MX

Nut of the drive pinion

RS-19-145 M39 X 1.5

Nm

1.250...1.535

RS-23-160 M45 X 1.5

Nm

1.350...1.670

RS-20-160 M45 X 1.5

Nm

1.350...1.670

Repair materials

Number

Designation

Order number

BR00.45-Z-1112-01A

Sealant

3M - 847