Iveco EuroCargo (12 to 26 t). Manual

70339

70341

70342

70346

Assemble the injectors (1) on the cylinder heads, in a way
that the fuel entrance hole (2) is turned towards the fuel
manifolds housing (3).
Screw fastening screws without clamping them.

Assemble a new ring (3), lubricated with vaseline, on the fuel
manifold (2) and insert it in the cylinder head housing so that
the position ball (5) clashes with its housing (4).

Screw fastening nuts without clamping them.

Fasten gradually and alternatively the injector fastening
screws (1) to 8.5

±0.8 Nm torque with a dynamometrical

wrench.

Fasten fuel manifold (3) fastening screws (2) to the 50 Nm
torque.

Check that the tappet registers (1) are unscrewed to avoid
problems with rods (7) during rocker unit (2) assembling.
Place the bond on the valve (6).

To fit down injectors use the tool 99342101
(Figure 10).

During this operation, move the injector (1) so that
the manifold (2 Figure 13) can be placed correctly
into the fuel entrance hole (2, Figure 12)

The notches (

•) on the bonds shall be turned

towards the exhaust manifold.

After, assemble rocker units (2) consisting of support
(5), rockers (3) and shafts (4) and fix them to cylinder
heads fastening the screws (8) to the Nm 36 torque.

Figure 12

Figure 13

Figure 14

Figure 15

The disassembled fuel manifolds (2) shall never be
used again but replaced with new ones.

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12-26 t

ENGINE

Base - February 2003

70520

Figure 16

Adjust clearance between rockers and valves through a
setscrew wrench (1), box wrench (3) and feeler gauge (2).

The clearance amounts to:

± 0.05

- suction valves 0.25

± 0.05

- exhaust valves 0.51

± 0.05

Complete assembling inverting the operations requested for
removal, bearing in mind to:

- Fasten injector connector nuts to the prescribed torque;

- Assemble high and low pressure tubings according to

the procedures described in the paragraph “main
service operations to be performed on engine fitted
on vehicle ”;

- Fill the cooling system with cooling fluid and bleed as

described before.

To adjust more quickly the rocker-valve clearance,
operate as follows:
Rotate driving shaft, balance cylinder No. 1 valves
and adjust the valves marked with * as described in
the tables:

4- cylinder engine

Rotate driving shaft, balance cylinder No. 4 valves
and adjust the valves marked with * as described in
the tables:

Rotate driving shaft, balance cylinder No. 6 valves
and adjust the valves marked with * as described in
the tables:

Check that the cooling fluid does not contain filth
before using it; if it does, filter with appropriate net
filters; in case of filling-ups, see the table REFUELING
in the section “GENERAL”.

Tests and checks

Start the engine, leave it in motion at a running rate
little more than the minimum and wait that the
cooling fluid temperature reaches the rate for the
thermostat to be opened , then check that:

- There are no water drippings from the connecting

manifolds of the engine cooling tubing and the cab
heating, fasten blocking collars further if necessary.

6-cylinder engine

Figure 16/1

REPLACING SEAL RING FRONT COVER
DRIVING SHAFT

78256

Apply on the front tang (2) of the driving shaft fixture
99340055 (4) and through the guiding holes of the fixture
itself, drill the internal seal ring (1) with a drill (

∅ 3,5 mm) to

a depth of 5 mm..
Fix fixture (4) to the ring (1) by means of the 6 screws in the
kit e proceed with the removal of the ring by screwing up the
screw (3).

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12-26 t

ENGINE

Base - February 2003

Suction

Exhaust

Cylinder No.

Suction

Exhaust

Cylinder No.

Suction

Exhaust

Cylinder No.

Suction

Exhaust

78257

Figure 16/2

Apply the proper rod (3) of fixture 99363204 to the external
seal ring (2) as shown in the figure and use lever (4), to
remove it from the front cover (1).

Figure 16/3

REPLACING

SEAL

RING

FLYWHEEL

HOUSING BOX

78258

Apply fixture 99340056 (3) on the rear tang (5) of the driving
shaft and through the guiding holes of the fixture, drill the
internal seal ring (1) with a drill (

∅ 3,5 mm) to a depth of 5

mm.
Fix fixture (3) to the ring (1) by means of the 6 screws (4)
in the kit e proceed with the removal of the ring by tightening
the screw (2).
Perform the removal of the external seal ring as shown and
described in figure 16/2.

Figure 16/4

Apply on the front tang (6) of the driving shaft part (5) of
fixture 99346252, fix it with screws (4) and key on it the new
seal ring (3). Position part (1) on part (5), tighten nut (2) till
complete assembly of seal ring (3) on the front cover (7).

70225

Figure 16/5

Apply on the rear tang (6) of the driving shaft part (5) of
’fixture 99346253, fix it with screws (4) and key on it the new
seal ring (3).

Position part (1) on part (5) tighten nut (2) until seal ring (3)
is fully assembled into the flywheel housing box (7).

70216

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12-26 t

ENGINE

Base - February 2003

70474

Figure 17

Before removal/refitting operations disconnect
battery terminals and place the vehicle in safety
conditions.

Lift the radiator cowling, overturn the cab and operate
as follows:

- Drain partially the cooling fluid in an appropriate tin;

- Disconnect the cooling fluid tubing (2) from

thermostat cover;

- Disconnect the air tubing (3) from the suction

manifold;

- Disconnect electrical connections;

•

(4), for heater

•

(12), for injectors

•

(13), for water temperature sensor;

•

(5) air temperature/pressure sensor;

•

(14), air from the rail pressure sensor;

- Remove the part of air tubing (15) from the

remaining tubing, from the compressor (8) and
from the bracket;

- Remove the cooling fluid tubing (9) from the

compressor (8);

- Remove oil breathe pipes (11) from tappet cover

(1);

- Disconnect exhaust fuel tubing (10) from pressure

adjusting valve;

- Remove high pressure tubing (7) from the rail and

high pressure pump (6).

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12-26 t

ENGINE

Base - February 2003

Content .. 4 5 6 7 ..

Iveco EuroCargo (12 to 26 t). Manual - part 6