Iveco Daily Euro 4. Manual — part 129
Lift denting (1) checking nut (2).
Using tool 99370317, stop the rotation of flange (3).
Unscrew and remove nut (2).
108047
108049
108048
108050
107839
74727
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Take flange (1) out of bevel pinion (2).
Should flange (2) be too difficult to remove, single-acting rear
axle 99341003 coupled to bracket pair 99341009 can be
used as an extracting assembly.
Using a proper beater, beat according to direction indicated
by the arrow until bevel pinion (1) complete with rear
bearing, fixed spacer and adjusting nut is ejected from rear
axle box (2).
Remove the seal (1) and the internal ring (2) of the front
bearing.
Use a punch to remove the external rings (3 - 4) of the
tapered roller bearings from the axle housing (1) and take out
the adjustment shim (2).
With axle 99341003 (2), brackets 99341011 (1), press
99341015 (5) extract the internal ring (3) on the bevel pinion
(4).
Dismounting bevel pinion
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Check planetary gears with relating rib thrust blocks, pin and
crown wheels with rib thrust blocks.
Replace all the sealing elements, the bevel pinion retaining
nut and the gear housing bearing adjustment ring nut with
new parts.
Carefully clean the single components of the differential
locking.
Lubricate the bearings and rotate the roller cage freely;
rotation must be even and without signs of stiffness. Check
the support surfaces of the ring bevel gear and the striking
surface of the half-casing so that the ring bevel gear fits
perfectly. Deformations of such parts, could determine
vibration of the ring bevel gear fastening screws, thus
compromising the perfect operation of the unit.
DIFFERENTIAL UNIT COMPONENTS
1. Nut - 2. Transmission connection flange - 3. Gasket - 4. Front bearing - 5. Bearing adjusting shim - 6. Spacer - 7. Ledge ring -
8. Rear bearing - 9. Bevel pinion - 10. Ring bevel gear - 11. Rib ring -12. Adjusting ring - 13. Taper roller bearing -
14. Differential box - 15. Crown wheel rib thrust block - 16. Crown wheel - 17. Planetary gear rib thrust block - 18. Planetary
gear - 19. Pin - 20. Screw securing ring gear / differential box
107840
Figure 32
Check for grooved section for keying the flange on the pinion
not being excessively worn out. Otherwise, replace the
pinion.
Checking the parts comprising the differential
Carefully clean all the threads in order to obtain
exact adjustments and accurate tightening torque.
If it is necessary to replace the ring bevel gear or
pinion, replace both parts since they are supplied
in pairs.
NOTE
The tapered roller bearings are supplied as spare
parts, lubricated with rustproof oil.
They must not be washed or heated for assembly.
The differential housing support bearings must
both be from the same supplier.
NOTE
NOTE
REAR AXLE NDA RS
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Tighten screws (3), for matching between bevel wheel (1)
and the box of differential (2), at prescribed torque.
Put crown wheels (6) and (10), complete with rib rings (5) and (11), into seats inside differential box (4).
Through the slits on box (4), position planetary gears (3) and (7), complete with rib thrust blocks (2) and (8), in order them
to contact crown wheels (6) and (10).
Rotate crown wheels in such a way that the holes of planetary gears are aligned to guide holes for pin (9) that are present on
the box of differential (4).
Thread pin (9) aligning the hole for spring peg (1) to the hole that is present on the box of differential (4).
Using a proper beater, put spring peg (1) into its seat.
108046
108045
Figure 33
Figure 34
Assembly of gear housing
Figure 35
108404
Using a proper beater, mount inner ring (1) on wheelwork
box (2).
Repeat operation for outer ring (3).
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On a surface plate (2), zero a dial gauge (1) set on the
mounting 99395728 (3) and pre-load it slightly.
108405
18241
108406
101977
108409
Figure 36
Figure 37
Figure 38
Figure 39
Figure 40
Using the punch 99374091 (3) and grip 99370006 (4), mount
the external ring (2) of the tapered roller bearing in the axle
housing (1).
Set adjusting ring (4), removed at disassembling, into rear axle
casing (5).
Using the punch 99374092 (2) and grip 99370007 (1), mount
the external ring (3) of the tapered roller bearing.
Mount provided washer (3) and inner ring (2) of taper roller
bearing on dummy pinion 99370239 (1).
Position dummy pinion 99370239 (1), assembled as in Figure
39, on the outer ring of taper roller bearing (2).
On the opposite side, fit the taper bearing internal ring (3)
on the dummy pinion (1) and the transmission shaft flange
(4) .
Screw nut (5) until dummy pinion is freely rotating without
axial clearance.
Assembling the bevel pinion assembly
New bearings are lubricated with rustproof oil and
must therefore not be washed or heated for
assembly.
NOTE
REAR AXLE NDA RS
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