Engines Iveco C10,C13, Cursor 10, Cursor 13. Manual

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

82.843
82.852

green/black

red/black

green/black

red/black

green/black

red/black

green/black

82.853
82.862

82.863
82.873

red/black =

2.044 to 2.053 mm

green/black =

2.033 to 2.043 mm

-0.254

82.726
82.735

red

green

red

green

red

2.097 to 2.107 mm

green =

2.108 to 2.117 mm

-0.508

82.472
82.481

red

green

red

green

red

green

red

green

82.482
82.492

red

green

red

green

red

2.224 to 2.234 mm

green =

2.235 to 2.244 mm

82.736
82.746

CURSOR ENGINES F3A

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

Base - May 2007

Arrange the bearing shells (1) on the main bearing housings
in the crankcase base (2).
Check the assembly clearance between the main journals of
the crankshaft and their bearings, proceeding as illustrated on
the following pages.

Using the tackle and hook 99360500 (1), mount the
crankshaft (2).

When fitting the gear (1) on the crankshaft (2), heat it for no
longer than 2 hours in an oven at a temperature of 180

°C.

After heating the gear (1), fit it on the shaft by applying a load
of 6000 N to it, positioning it at the distance shown in
Figure 32.
After cooling, the gear must have no axial movement under
a load of 29100 N.
If changing the pin (3), after fitting it on, check it protrudes
from the crankshaft as shown in the figure.

73534

47579

47578

49021

Mount the oil nozzles (2), making the grub screw match the
hole (3) on the crankcase.
Arrange the bearing shells (1) on the main bearing housings.

Replacing the timing gear
and oil pump

Check that the toothing of the gear is neither damaged nor
worn; if it is, take it out with an appropriate extractor and
replace it.

Checking main journal assembly
clearance

Figure 32

Figure 33

Figure 34

Figure 35

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

CURSOR ENGINES F3A

Base - May 2007

- 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 90

°,

following the diagram of Figure 38.

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 36

Figure 37

Figure 38

Figure 39

Figure 40

- 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

End float is checked by placing a magnetic dial gauge (2) on
the crankshaft (1), as shown in the figure. If the value obtained
is higher than specified, replace the rear thrust half-bearings
and repeat this check.

To check bench pin assembly clearance use the
screws removed during under block disassembly
seeing to replace them with new ones for definitive
assembly.

NOTE

CURSOR ENGINES F3A

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

Base - May 2007

47595

47596

Figure 41

Figure 42

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

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 43

49021

47581

Figure 44

Figure 45

Fit the sub-engine block and use a dynamometric wrench (2)
to tighten the outer hexagonal-grooved screws (1) to 25 Nm
according to the diagrams on the following page.

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

49022

Figure 46

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 45) with 90

° angular closing, using

tool 99395215 (3, Figure 45).

47579

ASSEMBLING

THE

ENGINE

THE

BENCH

NOTE

Use new screws every time for head.

NOTE

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

CURSOR ENGINES F3A

Base - May 2007

Content .. 27 28 29 30 ..

Engines Iveco C10,C13, Cursor 10, Cursor 13. Manual - part 29