Iveco Stralis AT/AD. Manual — part 142
72740
72739
84402
72742
84403
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Before putting the rear axle assembly on the stand for
overhauling, drain off the oil by unscrewing the bottom plug
of the differential case.
Put the rear axle (1) on the overhaul stand 99322215 (2).
Remove the split pin (4), washer (3), pin (2) and plate (1)
holding the brake linings.
Remove the plug (3), turn the adjustment unit (2)
anticlockwise, with a spanner, to make the pistons move back
into the calliper body.
Remove the brake linings (1) making the calliper body (2) float
appropriately.
525010
OVERHAULING THE REAR AXLE
ASSEMBLY
!
The following operations can also be performed with
the assembly mounted on the vehicle: removing
refitting drive shafts — removing refitting drums —
removing refitting differential.
525030
OVERHAULING THE WHEEL
HUBS
Removal
Take out the screws (2) and remove the brake calliper (1)
from the supporting flange (3).
18
REAR AXLE MS 13-175
S
TRALIS
AT/AD
Base - January 2003
72744
72746
72745
72747
72748
72749
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Put a container under the wheel hub to collect the oil. Lock
rotation of the wheel hub (1) with the retaining tool
99370317 (3). Take out the screws (2) and extract the drive
shaft (4).
Lift the notching of the ring nut (5). Using the wrench
99355180 (1) and multiplier 99389816 (2), remove the ring
nut (5) holding the wheel hub bearing. Take out the retaining
ring (4).
Remove the wheel hub (1). If this proves difficult, use the
extractor comprising: brackets 99341017 (2), bridge
99341003 (3), block 99345053 (4), applied as shown in the
figure.
If the brake calliper supporting plate (1) is damaged, remove
it from the axle housing by taking out the bolts (2).
Take out the screws (2) and remove the wheel hub (1) from
the brake disc (3).
Examine the state of wear of the brake disc (3) as described
in the ”BRAKE AIR SYSTEM” section.
The phonic wheel (1) is removed from the wheel hub (2)
with general tools.
REAR AXLE MS 13-175
19
S
TRALIS
AT/AD
72750
72752
72751
72753
Figure 15
Figure 16
Figure 17
Figure 18
Using a hydraulic press and tool 99370708 (1) take out the
wheel hub, spacer (3) and bearing (2).
Position the bearing (2) with the seal (4) turned as shown in
the figure on the wheel hub (3).
Using the press and tool 99370706 (1) mount the bearing
(2): bearing drive-in load 25,000 to 85,000 N.
Fit the spacer ring (2) in the wheel hub (1) and check on two
diametrically opposite points that, after assembly, the ring (2)
is sunk below the face of the wheel hub by 0.0 to 0.145 mm.
Checking the parts forming the wheel hubs
525035
Replacing the wheel fixing pins
Using general tools, drive the pins (2) out of the hub (1).
Make sure the supporting surface for the heads of the pins
has no burrs.
Carefully drive in the pins, applying a load no greater than
2500 kg on their heads.
Afterwards, check that the obliquity is no greater than 0.3 mm.
Thoroughly clean the single parts comprising the
wheel hub. Examine the drive shafts and check there
is no deformation.
Check the wheel fixing pins: if there is any deformation
or damage to the thread, replace them, using a press
to extract them.
Check the threads of the nuts to adjust the hub
bearings and the threads on the ends of the axle
housing; change the nuts if necessary.
Replace all the sealing elements with new parts.
20
REAR AXLE MS 13-175
S
TRALIS
AT/AD
Base - January 2003
Replacing wheel hub bearings
72754
72749
72755
72757
72748
72758
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
If the plate (1) were disassembled, fit it back on the axle
housing and tighten the nuts (2) for the fixing screws (3) to
the required torque.
Screw the tool 99370700 (2) onto the sleeve (1) of the axle
housing. Lubricate the tool external surface (1) with the oil
prescribed for the wheel hubs.
Heat the phonic wheel (1) to approx. 150
°C and fit it on the
wheel hub (2).
On completing assembly, make sure the phonic wheel (1)
rests correctly in the seat of the hub.
Fit the wheel hub on the sleeve of the axle housing and, using
a dial gauge (1) with a magnetic base, check that the radial
runout of the phonic wheel (2) is no greater than 0.2 mm.
Remove the wheel hub.
Mount the brake disc (3) on the wheel hub (1) and screw
down the screws (2).
Sling the brake disc (1) with a rope, hook this onto a lift and
fit the wheel hub (2) on the sleeve of the axle housing.
Remove the tool 99370700 (3).
REAR AXLE MS 13-175
21
S
TRALIS
AT/AD
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