Iveco Stralis AT/AD. Manual

Refitting

Make sure the surfaces of all the parts inside the hub
are thoroughly clean, with no waste or burrs.

Lubricate the bearings with Tutela W 140/M-DA oil
(Tutela TRUCK Fe-Axle for vehicles with rear disk
brakes).

Key the wheel hub on the stub axle together with the
brake disc. Insert the internal spacer onto the stub
axle then position the external bearing and thrust
washer.

Screw down and lock the adjustment ring nut to the
required torque.

36411

Figure 107

Strike the wheel hub a few times with a mallet in an axial
direction, turn it in both directions to free the bearing rollers.
Fit the magnetic base (1) together with the dial gauge (2) on
the wheel hub. Set the pointer of the dial gauge (3) at right
angles to the shank of the stub axle.

Reset the dial gauge with a pre-load of 1.5

÷ 2 mm.

With the aid of a lever, move the wheel hub axially and
measure the end float, which must be 0.16 mm (maximum
value).
On obtaining the required end float, lock the screw (5)
retaining the adjustment ring nut (4) to the required torque.

36412

Figure 108

Figure 109

Apply tool (1) 99395026 on wheel hub stud bolts and use
torque meter 99389819 (2) to check whether the wheel hub
rolling torque is at the set value.

Tighten to torque the hub cover (1, Figure 109).

Deposit a sealing bead (Loctite type 574) exclusively
on the hub cover ledge surface and protect the
threaded part.

Rotate the wheel hub until when hub cover (1) is positioned
as shown in the figure. Restore the prescribed quantity of oil
into the hub cover (1) through filling hole (2). Tighten the plug
on the hub cover (1) to the set torque.

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79121

79123

79122

79124

79125

Figure 110

Figure 111

Figure 112

Figure 113

Figure 114

Place the brake caliper on the bench and block it in a vice. Remove
the cover (1) and make a hole in it with a Parker screw.

Refit the supporting plate (1) and remove the fastening screws
(2).

Remove the sliding bushes (1).

Use tool 99372245 (2) (to be used with screw in tool
99372237) to disassemble the rubber sleeve (1).

Take the caliper to the press.

Insert the appropriate beater in the brass bush housing (1)
(See arrow A). Use the press to remove the bush (1).

BRAKE CALIPER OVERHAUL
Disassembly

AIR SYSTEM - BRAKES

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60742

Figure 115

Place the caliper on the bench and block it in a vice. Use the
wrench (4) to operate the clearance recovery device so that
the piston (1) comes out of the caliper body for a maximum
of 30 mm (value A).
Take off the dust-guard from the caliper body and use tool
99372238 (5) to remove the thrust pressing devices (1) of the
caliper together with the protection casings (3).

Component part cleaning and check

To wash metal parts, use a solution of hot water with Fiat LCD
detergent. Use a metal brush to remove dirt from the caliper
body and then a little brush to remove the residuals and to
clear accurately the guide pin and the sliding bush housings.

Use a synthetic brush with the right dimensions to remove the
grease left on the sliding bush housings.

Clean the caliper body accurately with compressed air.

Use a piece of cloth soaked with isopropyl alcohol or similar
to clean the sliding bushes accurately.

Check the wear conditions of the sliding bushes and their
housings on the brake caliper body. Make sure they are not
damaged or worn, especially the sliding surfaces. Fit the bushes
in their housings and check they slide regularly.

Fit the bushes in their housings, check they slide correctly,
otherwise replace or restore their housings on the caliper
body, if needed.

Value A must not be overcome because threaded
hoses (2) are synchronised. If the threaded hoses (2)
reach their over-travel, they loose synchronism and
the brake caliper must be replaced. The brake caliper
inner parts must never be removed.
For this reason you are recommended non to slacken
or to remove the cover retaining screws..

Regular braking depends mainly on the brake caliper
sliding on the guide pins.

Check the wear conditions of the brake lining retaining pins
and the related safety pins. If they are worn or damaged,
replace the worn parts.

It is advisable to replace all rubber and plastic parts and the
brass bush even if they do not seem damaged or worn at sight.

Assembly

Make sure all the brake caliper components are perfectly
clean. Possible abrasive residuals should be removed with a
cloth soaked in isopropyl alcohol or similar.

79126

Figure 116

Use tool 99372239 (4) (see figure A) to fit the protection
casings (2). Use the same tool 99372239 (4) fitted on the
other side (see figure B) to insert the pistons (1). Use the
wrench (3) to operate the clearance recovery device and ad
just the pistons (1).

Figure 117

79127

Use tool 99372244 (2) (to be used with the screw in tool
99372237) to assemble the rubber sleeve (1).

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79128

79129

79130

Figure 118

Figure 119

Figure 120

Figure 121

Use tool 99372243 (1) (to be used with tool 99372240 and
use screw in tool 99372237) to assemble the brass bush (2)
in its seat, by blocking its rotation by means of a suitable tool
(3) (punch or screwdriver).

Place the caliper under the press. Use the press to fit the brass
bush (1) in its housing until is comes out of the lower side by
1 mm.

Use the appropriate tool 99372242 (2) to carry out bruising
in the point (

→) next to the caliper body groove, in order to

prevent the brass bush (1) from moving.

Make sure there are no burrs in the bush housing, otherwise
remove them. Apply white grease RENOLIT HLT2 on the
bush.

Place the caliper on the bench and block it in the vice. Fit the
protection casing (2) by means of tool (1) 99372237.

Reverse the removal order to fit the sliding bushes
and the supporting plate.

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Iveco Stralis AT/AD. Manual - part 262