Iveco Stralis AT/AD. Manual

47581

47579

Figure 144

Figure 145

Figure 146

Fit the underblock and, using a dynamometric wrench (2),
close the splined outer (1) screws to 25 Nm torque,
according to the diagram shown on page 79.

Close the inner screws (1) to 140 Nm torque by means of
a dynamometric wrench (3), then with two further angular
phases 60

° + 60°, using tool 99395216 (4). Tighten again the

outer screws (1, Figure 145) with 90

° angular closing, using

tool 99395215 (3, Figure 145).

Fit the underblock by means of a suitable hoist and hooks (1).

49022

ENGINE F2B

TRALIS

AT/AD

Base - January 2003

44898

FRONT SIDE

Fourth phase:

inner screws
angle closing

(60º)

44897

44899

44898

Figure 147

First phase: outer

screws preliminary

tightening

(25 Nm)

FRONT SIDE

Second phase:

inner screws

preliminary

tightening

(140 Nm)

Fifth phase:

outer screws

angle closing

(90º)

44898

FRONT SIDE

Third phase:

inner screws
angle closing

(60º)

ENGINE F2B

TRALIS

AT/AD

DIAGRAM SHOWING THE UNDERBLOCK FIXING SCREWS TIGHTENING ORDER

49030

Rotate the cylinder assembly placing it vertically.
Lubricate the half-bearings (1) and fit them in the connecting
rod and the cap.

Figure 148

Connecting rod-piston assembly

Marking area of ideogram on the piston
crown

Connecting rod marking area

Figure 149

47593

Fit the connecting rod-piston assemblies (2) into the piston
liners, using the band 99360605 (1, Figure 150). Check the
following:

- the openings of the split rings are offset by 120º;

- all pistons belong to the same class, A or B;

- ideogram (2, Figure 149), stamped on the piston crown,

is placed toward the engine flywheel, or the cavity, on the
piston skirt, corresponds to the position of the oil spray
nozzles

Fitting the connecting rod-piston assembly
into the cylinder liners

Figure 150

61831

Not finding it necessary to replace the connecting
rod bearings, you need to fit them back in exactly the
same sequence and position as in removal.
If the big end bearings need to be replaced, choose
them according to the description given from page
52 to page 58.

Do not make any adjustment on the bearing shells.

The pistons are supplied as spares in class A and can
also be fitted in class B cylinder liners.

ENGINE F2B

TRALIS

AT/AD

Base - January 2003

47594

Figure 151

Figure 152

Figure 153

Figure 154

Figure 155

Figure 156

Connect the connecting rods to the relative journals, fit the
connection rod caps (1) with half bearings; tighten the fixing
screws (2) of the connecting rod caps to 50 Nm torque (5
kgm). Using tool 99395216 (3), further tighten screws with
40

° angle.

By means of centering ring 99396033 (2), check the exact
cover position (1), otherwise act as necessary and tighten the
screws.

Fit the sealing gasket (1), install the fitting tool 99346245 (2)
and drive the sealing gasket (1) by screwing nut (3).

Make sure that pistons 1-6 are exactly at the TDC Place the
sealing gasket (2) on the block. Fit the cylinder head (1) and
tighten screws as shown in figs. 155, 156 and 157.

Diagram showing the cylinder head fixing screws tightening
order

- Preliminary tightening by means of a dynamometric

wrench (1):
1

phase: 50 Nm (5 kgm:

phase: 100 Nm (10 kgm)

45255

45256

45266

45267

44900

ENGINE F2B

TRALIS

AT/AD

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Iveco Stralis AT/AD. Manual - part 23