Iveco Stralis AT/AD. Manual — part 156
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
74
REAR AXLE 451391
S
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
75
S
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
76
REAR AXLE 451391
S
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
77
S
TRALIS
AT/AD
525030
WHEEL HUB ASSEMBLY
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