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Iveco Daily. Manual - part 239

REAR AXLES 450311/1 - 450511

AILY

Base - May 2004

Figure 1

Position the vehicle on level ground and lock the front wheels.

Loosen the nuts securing the rear wheels.

Lift the vehicle at the back and set it on stands.

Put the hydraulic trolley 99321024 under the rear wheels. Take out
the nuts securing the wheels.

Unscrew the handbrake adjustment nut (4). Free the cables from the
vehicle crosspiece, unhooking the retaining clamps (3).

Unscrew the screws (6) securing the propeller shaft.

Disconnect the electric cables for indicating brake lining wear (2) and
(13), for the ABS speed sensors, if present.

Disconnect the braking corrector adjustment tie (14) from the axle
housing.

Unscrew the nuts (5) securing the shock absorbers.

Disconnect the oil pipe (1) from the fitting secured to the axle
housing.

Unscrew the screws (9) securing the stabilizer bar (10) to the axle.

Disconnect the pipe (16) from the axle housing oil vapour vent.

For axles with differential locking only

Release the spring (17) and remove the differential locking flexible tie
(18) support bracket (19) from the axle housing.

Disconnect the electric cable of the differential locking indicator
transmitter (15).

For all vehicles

Position a hydraulic jack equipped with the mounting 99370617
under the axle.

Unscrew the nuts (7) of the brackets (8) securing the axle to the leaf
spring (11).

Lower the hydraulic jack and extract the axle.

52121

Refitting

For refitting, carry out the operations described for removal in
reverse order, observing the required tightening torques for the
screws and/or nuts.

Afterwards, check that:

- Check the thread of the brackets joining the leaf springs to the

axle. If there are any irregularities, rectify the thread (operation
500412) or replace the brackets.

- Bleed the air from the brake hydraulic system as described under

the relevant heading (operation 784010).

- Adjust the handbrake control ties as described under the

relevant heading (operation 502710).

- Lock the nuts or screws to the required tightening torque.

- The self-locking nuts must not be reused.

- Check the state of the flexible pads (12) and replace them if they

have deteriorated (operation 500417).

- The lubricating oil in the axle housing should be at the right level.

REAR AXLES 450311/1 - 450511

AILY

REAR AXLE REMOVAL - REFITTING

Removal

REAR AXLES 450311/1 - 450511

AILY

Base - May 2004

51858

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
adjusted by changing the thickness of the adjustment ring
between the two tapered roller bearings.

In addition, it is possible to adjust the position of the bevel
pinion with respect to the ring bevel gear by changing the
thickness 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.

The wheel hubs are keyed, with UNIT BEARINGS lubricated
for life, onto the arms of the axle housing.

The bearings need no adjustment.

The brakes are disc brakes with floating brake calipers.

The disc brakes are keyed onto the wheel hubs.

The brake calipers are secured with flanges fixed onto the
arms of the axle housing.

The parking brake is the drum type, built into the brake disc.

REAR AXLES 450311/1 - 450511

AILY

Content .. 237 238 239 240 ..