Iveco Daily Euro 4. Manual — part 149
Figure 41
33084
Remove sun gears (5) and planetary gears (2) including the spi-
der (6) from the gearing half-box (4). Recover the shoulder
washers (1 and 3).
Figure 42
Remove bevel pinion retaining nut safety crimp and loosen
the nut using the counter lever 99370317 (1).
33086
Figure 43
Remove transmission connection flange (1).
33087
Figure 44
Use a bronze beater in arrow direction to remove the bevel
pinion (1) including the rear bearing, the fixed spacer and the
adjustment rings from the rear axle casing (2).
33088
Figure 45
33089
Remove the sealing ring (1) and the front taper roller bearing
from the rear axle casing (2). Use a bronze beater to remove
the front taper roller bearing outer ring.
Figure 46
33090
Use a bronze beater to remove the rear taper roller bearing
outer ring (1) from the rear axle casing (2).
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Figure 47
Use puller 99348001 (3) to remove the rear taper roller
bearing (2) from the bevel pinion (1).
33091
Differential components check
Carefully clean each differential component.
Lubricate the bearings and rotate the roller cage freely. The
rotation must be even and without sign of stiffness. Check the
ring bevel gear contact surfaces and the half-box striker plate
to ensure that the crown wheel adheres perfectly. Deforma-
tions on these surfaces cause the crown wheel fastening
screws to vibrate, thus jeopardizing the correct operation of
the unit.
Check that the splined section for flange-pinion connection is
not badly worn, otherwise replace the pinion.
Check the planetary gears and the relevant shoulder
washers, the spider and the crown wheels with the relevant
shoulder washers.
Replace all sealing elements, the bevel pinion retaining nut
and gearing case bearing adjustment nut with new parts.
Rear axle casing check
Check whether rear axle casing is not deformed.
Gearing case refitting
Figure 48
Fit in place the sun gear (2) with the shoulder washer set
below in gearing half-box (1).
33092
Figure 49
33084
Fit in place the planetary gears (2) with shoulder washers (3),
the spider (6) and the sun gear (5) with shoulder washer (1)
in the gearing half-box (4).
Figure 50
33094
Fit between them the half-boxes (1 and 2) and tighten the
fastening screws to the specified torque.
Carefully clean all threads in order to obtain exact
adjustments and accurate tightening torque.
When replacing the crown wheel or pinion it is
necessary to replace both parts since they are
supplied in pairs.
NOTE
NOTE
REAR AXLE 450517/2
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Heat in air-circulation furnace at 100ºC for approx. 15’ the
taper roller supporting bearing (1) on toothing side and fit it
down onto the gearing case (2) completely.
Figure 51
33095
Figure 52
Heat in air-circulation furnace at 100ºC for approx. 15’ the
taper roller supporting bearing (1) on toothing opposite side
and fit it down onto the gearing case (2) completely.
33096
Figure 53
Pour few drops of LOCTITE 270 into crown wheel (1) holes,
fit the crown wheel (1) on the gearing case (2) and tighten the
fastening screws to the specified torque.
33097
Figure 54
33098
Figure 55
33099
Figure 56
33100
Mount the outer ring of front taper roller bearing into rear axle
box using beater 99374093 (1).
Use beater 99374093 (1) to fit in place rear taper roller
bearing outer ring on rear axle casing (2) without adjustment
ring.
On surface plate (2), set to zero dial gauge 99395728 (1) on
support (3) and slightly preload it.
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Figure 57
33101
Fit the rear bearing (2) on the false pinion 99370296 (1).
33102
Position the false pinion 99370296 (1) including the rear bear-
ing (2) into its seat on rear axle casing (3).
Fit the front bearing, the transmission connecting flange and
the bevel pinion retaining nut and tighten so as to remove end
play and to enable false pinion rotation.
8,00
2
S =
- 0,05
3,90 + 4,10
2
S =
- (
± 0,05)
Set dial gauge 99395728 (1) including support (3) on false
pinion 99370296 (2).
Direct suitably the dial gauge previously set to zero (see
Figure 56) to position the rod to the bottom of the gearing
case supporting bearing housing.
33103
Repeat this operation for the other bearing and take note of
both found values.
Pinion adjustment ring thickness is obtained through the
following formula:
S =
- (
± B )
A
1
+ A
2
2
”S” = thickness of the adjustment rings to be positioned
between bevel pinion rear bearing outer ring and rear axle
casing.
”A1” = value found on right housing
”A2” = value found on left housing
”B” = reference value marked on bevel pinion (see Figure 60)
Example:
S = 4,00 - 0,05
S = 3,95
Adjustment ring thickness shall therefore be: 3.95 mm.
Figure 58
Figure 59
REAR AXLE 450517/2
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