Iveco Stralis AT/AD. Manual

40055

39635

39636

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Remove the bevel gear (1) from the mounting.
Remove the shoulder pin (2).

Using suitable pliers, remove the safety ring (2), extract the
gear unit (3) from the drive shaft.

Fit tool 99374451 (1) in the shoulder pin seat and extract the
drive shaft (2) from the load bearing sleeve.
Remove the spacer ring (3).

Figure 14

40056

Extract the support pins (2) from the side pinion support (1).
Remove the side pinions (3) from the support (1) and recover
the rollers and the spacer rings.

39637

Using a punch, remove the notch (1) on the adjusting nut.

Using Allen wrench 99354207 (1), unscrew the adjusting nut.

39638

Wheel hub disassembly

REAR AXLE 451391

TRALIS

AT/AD

Base - January 2003

Check the load bearing sleeve (2). If damaged, replace as
follows.
Unscrew the screws (1), remove the brake support plate (3)
and the axle casing sleeve (2).

39639

39640

39641

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Extract the bevel gear mounting (2), together with the bearing
and wheel hub (3), from the load bearing sleeve (1).

Check the surface of the ring (1), on which the hub seal ring
rotates, is not damaged or worn, if necessary, replace the ring
(1).
Using the extractor [comprising bridge 99341003, grips
99341023, tie rods 99341020, press 99341015 (5) and
reaction block 99345055 (4)], extract the ring (replacing if
necessary) and/or the internal ring (2) of the sleeve (3) taper
bearing.

39642

Using a punch inserted through the holes on the bevel gear
support, extract the external taper roller bearing (2) from the
bevel gear support (1).

39643

Using a universal bronze punch (1), extract the external ring
(2) for the internal bearing. The seal ring will also be extracted.
Proceed in the same way to extract the external bearing
external ring. If necessary, disassemble the phonic wheel.

REAR AXLE 451391

TRALIS

AT/AD

39644

Figure 20

Figure 21

CHECKING

THE

WHEEL

HUB

AND

EPICYCLOID REDUCTION GEAR UNIT

PARTS

Carefully clean the wheel hub parts. Check the drive

shafts for deformation. If necessary, straighten the

drive shafts using a hydraulic press; if this does not

provide satisfactory results, replace the drive shafts.

Check the studs fixing the wheel: if the threads are

damaged or deformed they must be replaced. Work

under a press to extract and re-assemble the studs.

On completion of assembly operations, check that

the orthogonal deviation is no greater than 0.3 mm.

Lubricate the bearings and make sure that the roller

support cage rotates freely, rotation should be

smooth, without hardening.

Check the threads on the hub bearings adjustment

nuts and on the load bearing sleeves; replace the nuts

if necessary. Check the oil manifold and replace if

damaged.

Replace all seals with new parts.

Carefully clean all the epicycloid gear unit parts.

Visually check the toothing on the bevel gear support,

the bevel gear, the crown wheel gears and the open

gear unit.

Check the spacer rings, distance ring, bearing rollers

and support pins.

Replace any damaged or worn parts.

Check the oil manifold (1) and replace if damaged. Extract

with a punch inserted in the slots on the hub (3). Remove the

seal ring (2).

40430

WHEEL HUB PARTS

1. Brake drum - 2. Adjusting nut and screw - 3. Cover - 4. Seal - 5. Pin and roller for side pinions - 6. Side pinion support -

7. Adjusting nut - 8. Ring bevel gear support - 9. Side pinion - 10. Shoulder pin - 11. Ring bevel gear - 12. Drive shaft -

13. Breather - 14. Bracket - 15. Shoulder pin - 16. Axle housing - 17. Load bearing sleeve - 18. Brake unit - 19. Phonic wheel

- 20. Oil sump - 21. Support ring - 22. Seal ring - 23. Seal ring - 24. Bearing - 25. Wheel hub - 26. Bearing - 27. Stud

REAR AXLE 451391

TRALIS

AT/AD

Base - January 2003

39645

39646

40410

71537

Figure 22

Figure 23

Figure 24

Figure 25

If the studs (3) need to be replaced, before fitting new studs,
make sure that the contact surface on the head is free of slag,
burr, blisters.

Using punch 99374093 (2) and a press, fit the external ring on
the external bearing (3), stopping approx. 5 mm from the fully
fitted position; complete fitting operations manually, using grip
99370007 (1).

Complete fitting operations manually, using grip 99370007,
then turn the hub over and carry out the same operation with
the external ring of the internal bearing.

Using a hydraulic press and key 99374161 (1), with the ring
(2) positioned as shown in the drawing, fit the brown internal
seal ring (3) on the wheel hub (4).

After fitting, check that the studs are fully inserted on the hub
and that the right angle error does not exceed 0.3 mm.

If the oil collecting sump (2) needs to be replaced, before
assembly, smear the contact surface on the hub/sump and
hub/hub seat with LOCTITE 573 sealing compound.

Refit the phonic wheel (1) and, on completion, make sure that
phonic wheel is positioned perfectly in the hub seat.
Using a 1/100ths feeler gauge, check that the right angle error
does not exceed 0.2 mm.

71538

Figure 26

Using a hydraulic press and key 99374161 (1), with the ring
(2) positioned as shown in the drawing, fit the blue seal ring
(3) on the wheel hub (4).

REAR AXLE 451391

TRALIS

AT/AD

525030

WHEEL HUB ASSEMBLY

Content .. 154 155 156 157 ..

Iveco Stralis AT/AD. Manual - part 156