Disassemble/assemble drive pinion

AR35.30-B-0459B

Disassemble/assemble drive pinion

12.02.16



Disassembling

1

Remove the rear axle pinion

 Axles 743.1 with longitudinal differential

AR35.30-B-0458B

 Axles 745.5; 741.9 with longitudinal differential

AR35.30-B-0458C

2

Remove the locking ring (11) and the inner race of the cylindrical roller bearing (10)



*000589453300

3

Remove the thrust ring (4)

4

Remove the tapered roller bearings (5) and (8), the split washer (6) and the spacer washer (7)

 Axles 743.1 with longitudinal differential

*321589043500

 Axles 741.93 and 745.5 with longitudinal differential

*000589453300



Check

5

Check the components for damage and wear

 Replace the defective parts. Thoroughly lubricate the sliding surfaces of all parts with gear oil

 Each crown/pinion set includes an electrically engraved number on the front face of the pinion and the oblique face of the crown. Both parts (crown and pinion) should have the same number engraved.



Installing

6

Install the inner race of the inner tapered roller bearing (8) with an appropriate sleeve

 Pre-heat the inner race of the bearing to 80 °C

 Note that the bearing widths are different. The inner bearing is wider than the outer bearing.

 Axles 741.93 and 745.5 with longitudinal differential

*370589011500

7

Install the spacer washer (7) and both outer races of the tapered roller bearings (5) and (8)

8

Install the inner race of the outer tapered roller bearing (5) using an appropriate sleeve

 Pre-heat the inner race of the bearing to 80 °C

 Note that the bearing widths are different. The inner bearing width is greater than the inner bearing width.

9

Install the inner race of the cylindrical roller bearing (10) at the tip of the pinion and lock it with the lock ring (11)

 Pre-heat the inner race of the bearing to 80 °C

10

Install the thrust ring (4)

11

Install the threaded ring (3)

Axles 743.1

12.1

Install temporarily a coupling flange on the pinion splines until it touches the thrust ring (3) and screw the collar nut (1)

Axles 743.1

12.2

Temporarily install the pinion gear (2) on the pinion splines until it touches the thrust ring (4)

 Axles 741.93 and 745.5

13.1

Screw the lock ring (12) on the coupling flange and secure the lock ring

 Axles 743.1

13.2

Secure the locking device (13) in a vise and secure the pinion assembly from the pinion gear on the locking device

 Axles 741.93 and 745.5



*395589016300

14

Tighten the collar nut (1) on the pinion assembly



*BA35.30-B-1001-06A

15

Install the split washer (6) and check frictional torque of the bearings

AR35.30-B-0470-04C

Frictional torque of the bearings

*BE35.31-B-1001-02C

Thickness if the split rings on the pinion

*BE35.31-B-1002-02C

 Axles 743.1 with longitudinal differential

*354589012100

 Axles 741.93 and 745.5 with longitudinal differential

*001589492100

 Axles 741.93 and 745.5 with longitudinal differential

*354589012100

16

Lock the collar nut (1) by punching the nut collar on the pinion groove

17

Install the pinion on the rear axle

 Axles 743.1 with longitudinal differential

AR35.30-B-0458B

 Axles 741.93 and 745.5 with longitudinal differential

AR35.30-B-0458C

Número

Denominação

Axles 743.0/1/2, 743.3, 746.890/891/980, 746.982/983

Axles 741.914/918, 741.93, 741.95, 742.8, 745.5, 745.9, 746.5, 746.8, 746.97; 746.990/991/994, 746.995/997

BE35.31-B-1001-02C

Friction moment of the pinion bearings

Nm

1.4 ... 4.2

1.4 ... 6.0

BE35.31-B-1002-02C

Thickness of bipartite washers of the pinion bearings - 0.02 mm increments

minimum

mm

6.66

6.60

Maximum

mm

7.08

7.40

Número

Denominação

Axles 743.104, 743.106, 743.132, 743.143, 743.149, 743.153, 746.890

Axles 741.930/931,741.950/951, 745.520, 743.523, 745.525, 745.590, 745.593, 745.596, 745.598

BA35.30-B-1001-06A

Attachment nut of the pinion drive gear

M40 - Hexagonal

Nm

360

360

M40 - Dodecagonal

Nm

480...500

580...600

M55

Nm

-

-