W35.30-0026-06
1 Collar nut
2 Drive flange
3 Radial sealing ring
4 Outer tapered roller bearing
5 Outer race of outer bearing
6 Drive pinion housing
7 Compensating ring
8 Spacer ring
9 Inner race of outer bearing
10 Inner tapered roller bearing
11 Drive pinion
12 Inner race
13 Retaining ring
Modification notes
5.6.03 | Value changed from 600 Nm to 850 Nm | Value in BA35.30-N-1001-03E changed for rear axle 771.000/001 |
| Disassemble | ||
1 | Remove differential assembly. | Model designation 771.000 | |
Model designation 745.79 | |||
2 | Remove ring gear with differential | ||
3 | Remove drive pinion | ||
4 | Remove circlip (13) | ||
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. | |
5 | Pull inner race (12) of pinion head bearing off drive pinion gear (11) | Heat inner race to approx. 80 °C. | |
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6 | Release and unscrew collar nut (1) | Attach retainer wrench to drive flange (2). | |
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7 | Detach drive flange (2) from drive pinion (11) | | |
8 | Detach drive pinion housing (6) from drive pinion (11) | Three-arm puller | |
9 | Remove radial sealing ring (3) | ||
10 | Remove outer tapered roller bearing (4) | ||
11 | Remove inner and outer bearing outer races (9 and 5) | Use a suitable drift to drive out the outer races. | |
12 | Remove compensating ring (7) and spacer ring (8) | ||
13 | Pull off inner tapered roller bearing (10) | | |
| 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. | |
14 | Drive new inner race (12) of pinion head bearing onto drive pinion gear (11) | Heat new inner race to approx. 80 °C. The larger inside chamfer of the inner race faces towards the splines. | |
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15 | Install circlip (13). | ||
16 | Install inner and outer bearing outer races (9 and 5) in drive pinion housing (6) | Use a suitable drift to drive in the outer races. | |
17 | Determine thickness of compensating ring (7) on drive pinion (11) | ||
Depth gage | |||
18 | Press inner tapered roller bearing (10) onto drive pinion (11) as far as the stop | Use a suitable sleeve to press on. | |
19 | Push spacer ring (8) and calculated compensating ring (7) onto drive pinion (11) | ||
20 | Position drive pinion housing (6) on drive pinion (11) | ||
21 | Press outer tapered roller bearing (4) onto drive pinion (11) as far as the stop | Use a suitable sleeve to press on. | |
22 | Drive in new combination radial sealing ring (3) | Coat radial sealing ring without rubberized external surface with sealant on outer circumference. | |
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Lightly grease sealing lips and pack space between dust and sealing lips with multipurpose grease. | |||
23 | Push on drive flange (2) | Lightly oil splines on drive pinion (11) with transmission oil. | |
24 | Tighten new collar nut (1) | Attach retainer wrench to drive flange (2). | |
Model designation 771.000 | |||
Model designation 745.79 | |||
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25 | Measure friction torque | Measure friction torque while spinning the drive pinion after at least three uninterrupted rotations. | |
Setting for model des. 771.000 | |||
Setting for model des. 745.79 | |||
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If the friction coefficient is not attained: | |||
Install a thicker or thinner compensating ring (aim for the lower value if the tapered roller bearings are run in; the higher value if they are new). | |||
26 | Secure collared nut | ||
27 | Installing drive pinion | ||
28 | Install crown wheel | ||
29 | Install differential assembly | Model designation 771.000 | |
Model designation 745.79 |
Test values for rear axle drive
Number | Designation | Rear axle 771.000/001 | ||
BE35.30-N-1002-01F | Friction torque of tapered roller bearings on drive pinion gear | mm | 5...10 | |
Inspection data of rear axle final drive
Number | Designation | Rear axle 745.79 | ||
BE35.30-N-1003-01D | Friction torque of tapered roller bearing on drive pinion | Nm | 5...10 | |
Differential assembly with differential
Number | Designation | Rear axle 771.000/001 | |||
BA35.30-N-1001-03E | Collar nut of drive flange to drive pinion | M 401.5 | Nm | - | |
M 451.5 | Nm | 850 | |||
Differential assembly with differential
Number | Designation | Rear axle 745.79 | |||
BA35.30-N-1006-03C | Collar nut of drive flange to drive pinion | M401.5 | Nm | 600 | |
352 589 04 15 00
Drift
Drift
Wrench socket
Torque wrench
000 589 12 09 00
740 589 00 15 00
745 589 01 21 00
000 589 45 33 00
Puller
Puller
Retainer wrench
Ratio wrench
717 589 00 31 00
001 589 19 33 00
000 589 69 63 00
Puller
035 589 01 33 00
Repair materials
Number | Designation | Order number |
BR00.45-Z-1092-02A | Adhesive kit, body, 2-component adhesive | A 009 989 36 71 |
BR00.45-Z-1023-06A | Hypoid gear oil | A 000 989 28 03 |
BR00.45-Z-1034-06A | MB multipurpose grease | A 001 989 34 51 10 |
Referenced documents
- ar3330w008503a Secure collar nut
- ar3530w0432c Remove/install differential assembly
- ar3530w0432f Remove/install differential assembly
- ar3530w0458b Remove/install drive pinion
- ar3530w045912b Determining thickness of shim at drive pinion
- ar3530w0464c Remove/install crown wheel with differential
- as0000z000201a Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.