Engine Iveco C10/C13/C78/Cursor 13/Cursor 78. Manual - part 66

SELECTING THE MAIN BEARING SHELLS (Journals with nominal diameter)
After reading off the data, for each of the main journals, on the crankcase and crankshaft, you choose the type of bearing shells
to use according to the following table:

STD.

1

2

3

1

2

3

green

green

red

red

red

red

green

green

green

green

red

red

green

green

green

green

green

green

Figure 27

22

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

green/black

SELECTING THE MAIN 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 that the new diameter of the journals is as shown in the table and to mount the only type
of bearing shell envisaged for the relevant undersizing.

-0.127

1

2

3

99.843
99.852

green/black

green/black

green/black

green/black

green/black

green/black

red/black

red/black

green/black

green/black

green/black

red/black

red/black

red/black

red/black

green/black

green/black

99.853
99.862

99.863
99.873

1

2

3

red/black =

3.028 to 3.037 mm

green/black =

3.038 to 3.047 mm

-0.254

1

2

3

99.726
99.746

red

red

red

red

red

red

red =

3.092 to 3.102 mm

-0.508

1

2

3

93.468
93.508

red

red

red

red

red

red

red =

3.219 to 3.229 mm

Figure 28

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

23

Figure 29

SELECTING THE BIG END BEARING SHELLS
(JOURNALS WITH NOMINAL DIAMETER)
There are three markings on the body of the connecting rod
in the position shown in the view from ”A”:

Letter indicating the class of weight:

A

=

4024 to 4054 g.

B

=

4055 to 4085 g.

C

=

4086 to 4116 g.

Number indicating the selection of the diameter of the
big end bearing seat:

1

=

87.000 to 87.010 mm

2

=

87.011 to 87.020 mm

3

=

87.021 to 87.030 mm

Numbers identifying the cap-connecting rod coupling.

1

2

3

The number, indicating the class of diameter of the bearing
shell seat may be 1, 2 o 3.

Determine the type of big end bearing to fit on each journal
by following the indications in the table (Figure 30).

47557

VIEW FROM “A”

STD.

1

2

3

1

2

3

green

green

red

green

red

red

red

green

green

green

green

green

green

green

green

green

red

red

Class

Figure 30

24

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

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

1

2

3

82.843
82.852

green/black

green/black

green/black

green/black

green/black

green/black

green/black

red/black

green/black

green/black

green/black

red/black

red/black

green/black

red/black

green/black

green/black

82.853
82.862

82.863
82.873

1

2

3

red/black =

2.044 to 2.053 mm

green/black =

2.033 to 2.043 mm

-0.254

1

2

3

82.726
82.735

red

green

green

red

green

green

red

=

2.097 to 2.107 mm

green =

2.108 to 2.117 mm

-0.508

1

2

3

82.472
82.481

red

green

green

red

green

green

red

red

green

red

red

green

82.482
82.492

red

red

green

red

red

green

red

=

2.224 to 2.234 mm

green =

2.235 to 2.244 mm

82.736
82.746

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

25