Iveco Stralis AT/AD. Manual — part 22
Figure 125
71721
A B C
D
E
F
D
L
G
H D
I
A. Drift with seat for bushings to insert/extract. - B. Grub screw for positioning bushings. - C. Reference mark to insert
seventh bushing correctly. - D. Reference mark to insert bushings 1, 2, 3, 4, 5, 6 correctly (red marks). - E. Guide bushing. -
F. Guide line. - G. Guide bushing to secure to the seventh bushing mount. - H. Plate fixing yellow bushing to cylinder head.
- I. Grip. - L. Extension coupling.
Figure 126
71725
The sequence for removing the bushings is 7, 6, 5, 4, 3, 2, 1.
The bushings are extracted from the front of the single seats.
Removal does not require the drift extension for bushings 5,
6 and 7 and it is not necessary to use the guide bushing.
For bushings 1, 2, 3 and 4 it is necessary to use the extension
and the guide bushings.
Position the drift accurately during the phase of removal.
Removal
Figure 127
Assembly
1 Position the bushing to insert on the drift (A) making the
grub screw on it coincide with the seat (B) (Figure 125)
on the bushing.
2 Position the guide bushing (E) and secure the guide
bushing (G) (Figure 125) on the seat of the 7
th
bushing
with the plate (H).
3 While driving in the bushing, make the reference mark (F)
match the mark (M). In this way, when it is driven home,
the lubrication hole on the bushing will coincide with the
oil pipe in its seat.
The bushing is driven home when the 1
st
red reference
mark (D) is flush with the guide bushing (G).
Assemble the drift together with the extension.
To insert bushings 1, 2, 3, 4 and 5, proceed as follows:
71723
Figure 128
To insert the bushing (6), proceed as follows:
- Unscrew the grip (I) and the extension (N).
- Position the extension (N) and the guide bushing (E) as
shown in the figure.
- Repeat steps 1, 2, 3.
Rear
Rear
77795
74
ENGINE F2B
S
TRALIS
AT/AD
Base - January 2003
Replacing camshaft bushes using beater 99360487
70000
49034
49033
47583
MAIN DATA TO CONTROL EXHAUST AND
DISCHARGE VALVE SPRING
Lubricate the valve stem and place the valves in the relevant
valve guides; install the lower plates (3) using tool 99360292,
fit the oil seal ring (1) on valve guides (2), then install the
valves as shown:
- fit springs (6) and the upper plate (5);
- apply tool 99360264 (2) and block it with bracket (4);
tighten the lever (1) until cotters are installed (3),
remove tool (2).
540665
VALVE SPRINGS
Fitting the valves and oil seal ring
Free spring height
Valve closed
Valve open
71724
To insert bushing (7), proceed as follows:
- Unscrew the grip (I) and the extension (N).
- Refit the guide (G) from the inside as shown in the figure.
- Position the bushing on the drift (A) and bring it close
up to the seat, making the bushing hole match the
lubrication hole in the head. Drive it home.
The 7
th
bushing is driven in when the reference mark (C)
is flush with the bushing seat.
Before assembly, the flexibility of the valve springs has to be
checked with the tool 99305047.
Compare the load and elastic deformation data with those
of the new springs given in the following figure.
Rear
Figure 129
Figure 130
Figure 131
Figure 132
Figure 133
ENGINE F2B
75
S
TRALIS
AT/AD
44925
The camshaft cams directly control rockers: 6 for injectors and 12 for valves.
Rockers slide directly on the cam profiles via rollers.
The other end acts on a bar directly supported by the two valves stems.
A pad is placed between the rocker adjusting screw and the bar.
Two lubrication holes are obtained inside the rockers.
The rocker shaft practically covers the whole cylinder head; remove it to have access to all the underlying components.
Figure 134
44914
44912
44913
Figure 135
Figure 136
Figure 137
PUMP INJECTOR ROCKER
EXHAUST VALVES ROCKER
The bush surfaces must not show any trace of scoring of
excessive wear; otherwise, replace bushes or the whole
rocker.
DISCHARGE VALVE ROCKER
Rocker
SECTION A-A
SECTION B-B
SECTION A-A
SECTION B-B
SECTION A-A
SECTION B-B
Check that the surface of the shaft shows no scoring or signs of seizure; if it does, replace it.
MAIN DATA OF THE ROCKER ARM SHAFT
79171
Shaft
Figure 138
76
ENGINE F2B
S
TRALIS
AT/AD
Base - January 2003
ROCKER SHAFT
47586
47595
47596
Figure 139
Figure 140
Figure 141
Figure 142
Fix the engine block to the stand 99322230 by means of
brackets 99361035.
Install the cylinder liners as described in page 49.
Fit the oil spray nozzles (2), so that the dowel coincides with
the block hole (3).
Place the half bearings (1) on the main bearings.
Place the half-bearings (1) on the main bearings in the
underblock (2).
By means of suitable equipment (1) apply silicone LOCTITE
5699 to the block, as shown in the figure.
Sealant application diagram
!
Fit the underblock within 10’ of the application of the
sealant.
47570
Figure 143
Lubricate the half bearings, then install the crankshaft (2) by
means of hoist and hook 99360500 (1).
49021
ENGINE F2B
77
S
TRALIS
AT/AD
ASSEMBLING THE ENGINE ON THE BENCH
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