Iveco Daily. Manual — part 246
64
REAR AXLE 450517/2
D
AILY
Base - May 2004
62983
Figure 2
DESCRIPTION
The rear axle is the load-bearing type with a single reduction
using a hypoid crown wheel and pinion.
The axle housing is made of pressed sheet steel with hot
pressed arms.
The central portion, seat of the differential unit, is equipped
with cooling fins.
The bevel pinion is supported by two pre-lapped tapered
roller bearings to hold the bearing pre-load better.
The rolling torque of the bearings of the bevel pinion is ad-
justed by changing the thickness of the adjustment ring be-
tween the two tapered roller bearings.
In addition, it is possible to adjust the position of the bevel pin-
ion with respect to the ring bevel gear by changing the thick-
ness of the ring between the axle housing and the bevel pinion
rear bearing external ring.
The gear housing is supported by two tapered roller bearings.
The rolling torque of the bearings is adjusted with adjustment
rings between the spacer rings and the external rings of the
bearings.
The clearance between pinion and crown wheel is adjusted
by changing the thickness and/or position of the adjustment
rings, though the total thickness must be the same as that of
the adjustment rings removed.
The gear housing is composed of two half-housings.
It may be of two different sizes depending on the ratio of the
crown wheel and pinion.
The gearing of the differential is composed of four planetary
gears and two crown wheels.
Wheel hubs are supported by two ”SET RIGHT” type bear-
ings set on the sleeve.
The bearings need no adjustment.
The brakes are disc brakes with floating brake calipers.
The disc brakes are keyed onto the wheel hubs.
Perrot type brake callipers are supported by flanges welded
to rear axle casing arms.
The parking brake is the drum type, built into the brake disc.
REAR AXLE 450517/2
65
D
AILY
SPECIFICATIONS AND DATA
66
REAR AXLE 450517/2
D
AILY
Base - May 2004
Bearing with single reduction and
mechanical
control
differential
locking
450517/2
DIFFERENTIAL UNIT
Reduction bevel gear pair ratio
(tooth no.: pinion/crown wheel), on
request
1/3.91 (11/43) - 1/4.30 (10/43)* -
1/4.56 (9/41)* - 1/5.13 (8/41)*
Bearings for bevel pinion
2 taper rollers
Bevel pinion bearing rolling torque
(lubricated gaskets and bearings)
Nm
New bearings
kgm
2
÷ 3
0.20
÷ 0.30
Bevel
pinion
bearing
preload
adjustment
through adjustment rings
>
Bevel
pinion
bearing
preload
adjustment ring thickness
1
∗ - 2 mm
* with 0.025 mm progression
Temperature
for
fitting
inner
bearing ring on bevel pinion
80
°C
÷ 90 °C
Bevel pinion position with reference
to differential casing
By means of shims
>
Thickness
of
adjustment
rings
between
bevel
pinion
and
differential casing
3.45
÷ 4.35 mm
with 0.025 mm progression
Bearings for gearing case
2 taper rollers
Differential case bearing rolling
torque
Nm
kgm
2.6
÷ 3.9
0.26
÷ 0.39
Adjustment of differential case
bearing rolling torque
Through adjustment rings
>
Thickness of adjustment rings for
differential
case
bearing rolling
torque
2.65
÷ 3.20 mm
with 0.05 mm progression
Backlash between pinion and crown
wheel
0
.
15
÷ 0.20 mm
Adjustment of backlash between
pinion and crown wheel
Through adjustment rings
REAR AXLE 450517/2
67
D
AILY
450517/2
WHEEL HUBS
Wheel hub bearings
Two ”SET-RIGHT” type taper rollers
Hub bearing end play
0.16 max.
Wheel hub bearing rolling torque
Nm
kgm
0
÷ 4
0
÷ 0.4
Wheel
hub bearing
end play
adjustment
Fastening nut tightening to torque
Rear axle oil
Amount
Litres
kg
Max. capacity GAW
kg
Tutela W140/M-DA
(SAE 85 W140)
3
2.7
5000
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