Iveco Daily Euro 4. Manual

525010

OVERHAULING THE REAR AXLE
ASSEMBLYOVERHAULING

THE

REAR AXLE ASSEMBLY

For differential assembly repair operations, refer to
what described in chapter ” NDA-RS rear axle” on
pages 22 to 34.

NOTE

Before positioning the rear axle assembly on the stand for
overhauling, drain oil by loosening rear axle casing plug.

The drive shafts, brake disc and calipers, air
breather and differential can all be removed and
refitted even with the unit mounted on the vehicle.

NOTE

Figure 5

Figure 6

Set the entire rear axle assembly on stand 99322215.

Take out the screws (1) and remove the brake caliper with
its brake linings from the mounting.

525013

Air breather disassembly - assembly

The identification data of the rear axle unit are
given on the plate (1) fixed near to the leaf spring
attachment support.

NOTE

107860

107854

525030

Wheel hub overhaul

Figure 7

Take out the screws (1) and remove the brake caliper (2)
with its brake linings from the mounting.

The caliper must not be violently knocked or
dropped.

Prevent the rubber caps coming into contact with
sharp metal tools.

Do not dirty or wet the rubber caps with mineral grease or
oil.

Do not dirty the pads with liquids or grease.

Do not operate the parking brake lever before mounting on
the disc.

This makes the piston come out, decreasing the gap between
the two brake linings and jeopardizing wearability on the disc.

Should this be done unexpectedly, it is necessary to take
down the brake linings and move the piston back with tool
99372236, taking the precautions given in the BRAKES
section.

108435

Figure 8

Take out the screws (1) and remove the drive shaft (2).

101967

REAR AXLE NDA RG

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Figure 9

Lift up the notch (

⇒) of the ring nut (1). Using the wrench

99355087 (2) remove the ring nut (1), take out the washer
and extract the wheel hubs (3).

525031

Replacing the wheel hub bearing

Disassembly

44613

44616

Figure 10

Figure 11

Remove bearing protection ring.
Take out the screws (2) and remove the brake disc (1) from
the wheel hub. Check the brake disc as described under the
Brakes heading.

The bearing (1) is removed from the wheel hub with the aid
of an ordinary punch.

Bearing (1) driving load is 2100

÷ 5000 kg.

NOTE

101969

Figure 12

45164

The new bearing should be mounted in the wheel hub with
a press and tool 99370498.

Figure 13

Mount the brake disc (1) on the wheel hub (2) and tighten
the fixing screws (3) to the required torque.

101970

Assembly

In resting the hubs on the bench, pay attention that
phonic wheel is not being damaged.

NOTE

REAR AXLE NDA RG

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44618

Figure 14

Figure 15

If it is necessary to replace the pins of the wheel hub (1),
before mounting the new ones, check that the mating surface
of the pin head is free from burrs, dross and blisters.

The pins should be driven in by applying a load on their head
no greater than 2000 kg.

After driving them home, check that the pins are perfectly in
touch with the hub: maximum orthogonal tolerance 0.2 mm.

Figure 16

44619

Stand the bearing of the wheel hub (2) on a special mounting
that permits rotation. With a magnetic dial gauge (1) check
the off-centring of the brake disc on both sides.

Centering error must not exceed 0.1 mm.

44621

Mount the inserter 99370497 (2) on the sleeve.
Lubricate the sleeve with TUTELA W90/M-DA oil and key
the wheel hub (1).

REAR AXLE NDA RG

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Figure 17

Figure 18

Figure 19

44622

Mount new washer (1), ring nut (2) and, using wrench
99355087 (3), tighten ring nut (2) at prescribed torque.
Notch the fixing ring nut (2) on the milling of the axle housing
arm.

108435

Mount brake caliper support on rear axle arm observing
prescribed tightening torques.

Thread braking gaskets.

Apply brake caliper (2) to the support and tighten securing
screws (1) at prescribed torque using a torque wrench.

Where brake caliper plunger must be withdrawn, observe
what indicated in section Brakes.

Apply IVECO 1905685 sealant on the contact surfaces of the
drive shaft (2) with the wheel hub (1).
Mount the drive shaft (2) in the sleeve.
Tighten the screws (3) securing the drive shaft (2) to the hub
(1) to the required torque.
After the assembling operation has been completed, fill the
rear axle case with TUTELA W90/M - DA oil to the
prescribed amount and grade.

44626

On each brake caliper remounting operation,
replace screws (1): these screws cannot be reused
once they have been unscrewed.

NOTE

REAR AXLE NDA RG

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Content .. 133 134 135 136 ..

Iveco Daily Euro 4. Manual - part 135