Iveco Stralis AT/AD. Manual — part 23
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).
α
α
49022
78
ENGINE F2B
S
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
FRONT SIDE
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
79
S
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
1
2
3
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.
80
ENGINE F2B
S
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
st
phase: 50 Nm (5 kgm:
2
nd
phase: 100 Nm (10 kgm)
45255
45256
α
45266
45267
44900
ENGINE F2B
81
S
TRALIS
AT/AD
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