Engines Iveco C10,C13, Cursor 10, Cursor 13. Instruction - page 28

DEFINING THE CLASS OF DIAMETER OF THE MAIN JOURNALS AND CRANKPINS (Journals with nominal diameter)
Main journals and crankpins: determining the class of diameter of the journals.
Three sets of numbers are marked on the crankshaft in the position shown by the arrow (Figure 26 at top):
- The first number, of five digits, is the part number of the shaft.
- Under this number, on the left, a set of six digits refers to the crankpins and is preceded by a single digit showing the status

of the journals (1 = STD, 2 = -0.127), the other six digits, taken singly, give the class of diameter of each of the crankpins
they refer to (Figure 26 at top).

- The set of seven digits, on the right, refers to the main journals and is preceded by a single digit: the single digit shows the

status of the journals (1 = STD, 2 = -0.127), the other seven digits, taken singly, give the class of diameter of each of the
main journals they refer to (Figure 26 at bottom).

Figure 26

82.970 to 82.979

82.980 to 82.989

82.990 to 83.000

CLASS

CRANKPIN

NOMINAL DIAMETER

92.970 to 92.979

92.980 to 92.989

92.990 to 93.000

CLASS

MAIN JOURNALS

NOMINAL DIAMETER

19

CURSOR ENGINES F3A

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

Base - May 2007

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

20

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

CURSOR ENGINES F3A

Base - May 2007

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

21

CURSOR ENGINES F3A

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

Base - May 2007

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

=

4043 to 4073 g.

B

=

4074 to 4104 g.

C

=

4105 to 4135 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

22

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

CURSOR ENGINES F3A

Base - May 2007

Рассказать друзьям