Iveco Stralis AT/AD. Manual

49226

49227

49228

49229

Figure 43

Figure 44

Figure 45

Figure 46

Using tool 99370317 (2), lock the flange (1).
Using wrench 9955088 (3) and multiplier (4), loosen the
bevel pinion nut.

Remove the nut (1) and extract the flange (2).
Remove the screws (3) fastening the bevel pinion support to
the differential housing (4).
Remove the complete bevel pinion support (5) from the
differential carrier. Remove the shims (6) for adjusting the
pinion position in relation to the crown wheel and use a
micrometer to measure the overall thickness.

Using a suitable puller (1), extract the bearing (2).

Removing the gearcase

Place the gearcase on tool 9971047 (1).
Remove the locknuts (2) fastening the ring bevel gear (3) to
the gearcase.
Using a bronze beater, remove the ring bevel gear.

Figure 47

49228A

Turn the gearcase upside down and remove the bearing (1).
(This is a destructive operation).

Check that the seal ring is intact (O-ring), change it
if damaged.

REAR AXLE MS 13-175

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Base - January 2003

49233

49234A

Figure 48

Figure 49

Remove components (2 - 3 - 4 - 5 - 6 - 7 - 8 - 9) from the
half casing (1).

GEARCASE COMPONENTS

1. Half casing - 2. Half casing - 3. Crown wheel - 4. Planetary gear - 5. Spider - 6. Shoulder washer -

7. Planetary gears - 8 Crown wheel - 9 Shoulder washer

Mark the mounting positions of the two half casings (2 and
3) and spider.
Remove the screws (1) and lift the half casing (2) off the unit.

REAR AXLE MS 13-175

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49230

72765

49232

Figure 50

Figure 51

Figure 52

Using tool 99348001, extract the bearing (1) from the bevel
pinion (2).

Drive the bevel pinion (2) out of the mounting (1) (under a
press).

Using a suitable tool (1), extract the bearing (2).

Differential component check

Carefully clean all differential components.
Lubricate the bearings and rotate the roller cage; it
should rotate freely and smoothly.

Inspect the ring bevel gear and half casing contact
surfaces, making sure the ring bevel gear perfectly
adheres. Warped surfaces may cause ring bevel gear
fastening screw vibration, thus undermining the unit
operation.
Make sure the slotted section fastening the flange to
the pinion is not worn. If it is, replace the pinion.

526249

REMOVING THE BEVEL PINION
FROM THE SUPPORT

The mounting (1) is supplied as a spare part together
with preassembled tapered roller bearings and seals
(3 and 4).

REAR AXLE MS 13-175

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Base - January 2003

34847

49235

19383

49235A

49244

49236

Figure 53

Figure 54

Figure 55

Figure 56

Figure 57

Figure 58

Place the half casing (3) on tool 99371047.
Insert the crown wheel shoulder washer (2) into the half
casing, then fit the crown wheel (1).

Fit the spider (6), complete with planetary gears (5) and
shoulder washers (3), to the half casing (4).
If the spider has not been replaced, make sure the marks
made on removal match.
Fit the second crown wheel (2) complete with shoulder
washer (1).

Fit the half casing (2).
Make sure the marks made on removal match. Insert the
screws (1) and tighten as follows:

- 1

phase: tightening with a torque wrench (3) to a

torque of 100 Nm (10 kgm).

- 2

stage: tighten the screws (1) by means of tool

99395216 (3) at 110

° to 120° angle.

Heat the bearing (2) at 100

°C for approx. 15 min. in a

convection furnace and fit it, using a suitable beater.

Heat the ring bevel gear (1) to a temperature of 100ºC

÷ 150ºC

in an air circulation oven and position it in its seat, in the gear
housing, checking it turns freely and making the holes coincide
for the screws fixing the ring bevel gear-gear housing by fitting
the 4 manoeuvring screws.

Let the ring bevel gear cool, then place the gearcase upside
down on the tool.
Insert the screws (1) and tighten as follows:

- 1

stage: tighten to 100 Nm (10 kgm) torque by means

of a torque wrench (2);

- replace the 4 manoeuvre screws with new ones and

apply the same specified torque.

Fitting the gear housing

REAR AXLE MS 13-175

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Content .. 142 143 144 145 ..

Iveco Stralis AT/AD. Manual - part 144