Disassemble/assemble drive pinion

AR35.30-B-0459C

Disassemble/assemble drive pinion

21.08.2020

Rear axle

745 in model 384, 386, 693, 694, 695

Rear axle

745 in model 958

Rear axle

745.0 in model 384

1

Self-locking nut

2

Coupling flange

3

Sealing ring

4

Threaded ring

5

Thrust ring

6

Tapered roller bearing

7

Split washer

8

Spacer washer

9

Tapered roller bearing

10

Pinion

11

Inner race - Cylindrical roller bearings

12

Locking ring

13

Immobilizing key



Disassemble

1

Remove the pinion assembly from the rear axle

.

AR35.30-B-0458F

2

Secure the pinion assembly in a vise and remove the lock nut (1)

3

Remove the coupling flange (2)

 Puller

*035589013300

4

Remove the threaded ring (4) and the thrust ring (5)

 Claw-type wrench

*302589010700

5

Extract both sealing rings (3) from the threaded ring (4), using an appropriate mandrel

6

Using a press, extract tapered roller bearings (6) and (9), split washer (7), and spacer ring (8)

 Eixos com redução 8:39 e 8:45
Thrust piece

*345589013400

7

Remove lock ring (12) and roller bearing inner race (11)



Check

8

Check the components for damage and wear

 Replace the worn out or damaged parts. Use gear oil to thoroughly lubricate all sliding surfaces on the components.

 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.



Assemble

9

Install the inner race of inner tapered roller bearing (9) with a suitable tool

 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.

10

Install spacer washer (8) and both tapered roller bearing outer races (6) and (9)

11

Install the inner race of the outer tapered roller bearing (6) using an appropriate sleeve

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

12

Install the thrust ring (5)

13

Using a press, insert new sealing rings (3) in threaded ring (4)

 Apply a sealing agent to the external surface of the sealing rings.

Terolan 307/II, Dichtin 51, epple 22 sealant

*BR00.45-Z-1018-01A

 Drift punch

*745589001500

 Drift

*055589101500

14

Install the threaded ring (4) with sealing rings on the pinion

 Fill the inner space between the seal lips with grease.

Grease, DB supply specification 6804 - Class 267.0

*BR00.45-Z-1107-06A

 Claw-type wrench

*302589010700

15

Install the coupling flange (2)

 Touch the stop ring on the pinion grooves (5) and tighten the lock nut (1).

16

Secure the coupling flange (2) to the coupling key fixed to a bench vise and tighten the lock nut (1)

 .Mounting nut of pinion coupling flange

*BA35.30-B-1001-06C

 Retainer wrench

*717589003100

17

Fit the inner race of roller bearing (11) to the pinion top and lock it with lock ring (12)

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

18

Install split washer (7) and check the friction torque of the bearings

.

AR35.30-B-0470-04XB

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

*BE35.31-B-1002-02C

Pinion bearings friction torque

*BE35.31-B-1001-02C

 Tester

*354589012100

 Torque meter

*001589492100

 Tester

*354589012100

19

Lock the lock nut (1)

 Punch the nut collar into the pinion groove.

20

Install the pinion on the rear axle

Values that evidence the difference, friction moment

Number

Designation

Axle 745.0

Rear axle 741.9, 742.8, 745.5/9, 746.5/8/9

BE35.31-B-1001-02C

Pinion bearings friction torque

Nm

1,4 ... 4,2

1,4 ... 6,0

Values that evidence the difference, friction moment

Number

Designation

Axle 745.0

Rear axle 741.9, 742.8, 745.5/9, 746.5/8/9

BE35.31-B-1002-02C

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

minimum

mm

6,80

6,60

Maximum

mm

7,42

7,40

 Pinion

Number

Designation

Rear axle 745.0

BA35.30-B-1001-06C

Mounting nut of pinion coupling flange

M32

Nm

-

M40 Hex

Nm

360

M40 Dodecagonal

Nm

480

Repair materials

Number

Designation

Order number

BR00.45-Z-1018-01A

Terolan 307/II, Dichtin 51, epple 22 sealant

Use corresponding commercially available repair materials.

BR00.45-Z-1107-06A

Grease, DB supply specification 6804 - Class 267.0

Use corresponding commercially available repair materials.