Engine Iveco C10/C13/C78/Cursor 13/Cursor 78. Manual - part 105

Figure 31

green/black

Selecting big end bearing shells (ground journals)
If the journals have been ground, the procedure described so far cannot be applied.
In this case, it is necessary to check (for each of the undersizings) which field of tolerance includes the new diameter of the
crankpins and to mount the bearing shells identified with the relevant table.

-0.127

89.843
89.852

green/black

red/black

green/black

red/black

green/black

89.853
89.862

89.863
89.873

red/black =

2.028 to 2.038 mm

green/black =

2.039 to 2.048 mm

-0.254

89.726
89.735

red

green

red

green

red

2.092 to 2.102 mm

green =

2.103 to 2.112 mm

-0.508

89.472
89.481

red

green

red

green

red

green

red

green

89.482
89.492

red

green

red

green

red

2.219 to 2.229 mm

green =

2.230 to 2.239 mm

89.736
89.746

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

Install the half-bearings (1) on the main bearings in the
underblock (2).
Check the installation clearance between the main journals
and the relative bearings as follows:

Using the hoist and hook 99360500 (1) mount the driving
shaft (2).

When fitting gear (1) onto drive shaft (2), the gear must be
heated for 2 hours max. in a furnace, at a temperature not
higher than 180

°C.

Let them cool down after the installation.

If changing the pin (3), after fitting it on, check it protrudes
from the crankshaft as shown in the figure.

49020

47579

47578

49021

Figure 32

Figure 33

Figure 34

Figure 35

Install the oil spray nozzles (2) and have the dowel coincide
with the block hole (3).
Install the half-bearings (1) on the main bearings.

Replacing the timing control gear and the oil
pump

Check that the teeth of the gears are not damaged or worn,
otherwise remove them using the appropriate extractor.

Checking main journal installation clearance

Figure 36

By means of suitable equipment (1) apply silicone LOCTITE
5970 to the block, as shown in the figure.
Frame shows the application scheme for the LOCTITE 5970
sealant.

101507

Fit the underblock within 10’ of the application of
the sealant.

NOTE

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

- Lubricate the internal screws (1) with UTDM oil and

tighten them with a torque wrench (3) to a torque of
120 Nm, using tool 99395216 (4), to an angle of 60

°,

following the diagram below.

Set two journals of the crankshaft (2) parallel to the
longitudinal axis, a section of calibrated wire. Using
appropriate hooks and tackle, mount the crankcase base (1).

60559

47579

47578

47588

60593

Figure 37

Figure 38

Figure 39

Figure 40

Figure 41

- Remove the crankcase base.
The clearance between the main bearings and their journals
is measured by comparing the width taken on by the
calibrated wire (2) at the point of greatest crushing with the
graduated scale on the case (1) containing the calibrated
wire.
The numbers on the scale give the clearance of the coupling
in millimetres. If you find the clearance is not as required,
replace the bearing shells and repeat the check.

FRONT SIDE

DIAGRAM OF SEQUENCE FOR TIGHTENING THE SCREWS FIXING

THE BOTTOM CRANKCASE BASE TO THE CRANKCASE

Checking crankshaft end float

The end float is checked by setting a dial gauge (1) 99395603
with a magnetic base on the crankshaft (2) as shown in the
figure. If you find the clearance to be greater than as required,
replace the rear main bearing shells carrying the thrust
bearings and repeat the clearance check.

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

47595

47596

Figure 42

Figure 43

Place the half-bearings (1) on the main bearings in the
underblock (2).

By means of suitable equipment (1) apply silicone LOCTITE
5970 IVECO No. 2992644 to the block, as shown in the
figure.

Sealant application diagram

Fit the underblock within 10’ of the application of
the sealant.

Figure 44

49021

47581

Figure 45

Figure 46

Fit the sub-engine block and use a dynamometric wrench (2)
to tighten the outer hexagonal-grooved screws (1) to 30 Nm
according to the diagrams on the following page.

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

49022

47579

Figure 47

Close the inner screws (1) to 120 Nm torque by means of
a dynamometric wrench (3), then with two further angular
phases 60

° + 55°, using tool 99395216 (4). Tighten again the

outer screws (1, Figure 46) with 60

° angular closing, using

tool 99395216 (3, Figure 46).

ASSEMBLING

THE

ENGINE

THE

BENCH

NOTE

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

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