Engines Iveco C87 / Cursor 87. Manual

Figure 29

SELECTING THE BIG END BEARING SHELLS
(JOURNALS WITH NOMINAL DIAMETER)
There are 4 references on the connecting rod casing in the
positions illustrated:

Coloured mark for identifying the weight

Coloured mark for identifying the diameter grade

Positioning stud visible from the front of the engine

Progressive number for identifying the connecting rod

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

STD.

green

red

green

red

green

yellow

green

yellow

green

Class

Figure 30

The identification colours of the marks are given in
the table on page 31.

NOTE

yellow

green

blue

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

F2C CURSOR ENGINES

green/black

Selection of connecting rod half-bearings (rectified pins)

If pins have been rectified, the procedure described must be applied.

In this case, (for each undersizing) determine the tolerance field the new big end pins belong to, and install the half-bearings
identified according to the relative table.

-0.127

81.789
81.799

green/black

yellow/black

red/black

green/black

yellow/black

red/black

green/black

81.799
81.809

81.809
81.819

red/black =

mm 2.057 to 2.065

green/black =

mm 2.065 to 2.073

Figure 31

green/black =

mm 2.073 to 2.081

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

F2C CURSOR ENGINES

Base - June 2007

Place bearing halves (1) on main journals (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).

After fitting the gear (1) on the crankshaft (2), heat it for

~15 minutes in an oven at 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.

115883

114049

114034

114050

Figure 32

Figure 33

Figure 34

Figure 35

Fit the oil jets (2) aligning the dowel with the opening (3) in
the crankcase.

Position the half-bearings (1) and the thrust washers on the
main journal supports as illustrated in Figure 18.

540815

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.

540811

Checking main journal installation
clearance

Before fitting the gear, spread Loctite type 603 on
approx. 5 mm wide band on crankshaft, at 30 mm
from contact surface.

NOTE

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

F2C CURSOR ENGINES

End float is checked by placing a magnetic dial gauge (1) on
the crankshaft (2), as shown in the figure.

If the value obtained is higher than specified, replace the rear
thrust half-bearings and repeat this check.

- Position the main journal caps (4) and fit the

strengthening plate (2) following the procedure
described:

- Tighten the inner bolts and then the outer bolts by hand

starting from main journal ”7” and continuing until main
journal ”1”.

- Tightening the bolts using torque wrench always starting

from main journal ”7” and continuing until main journal
”1”:
1

stage: 140 Nm

stage 60

°+60°

Fit sized wire sections (2) on crankshaft (3) parallel to
longitudinal axis.

Install main journals (1).

114051

47579

114615

47588

Figure 36

Figure 37

Figure 38

Figure 39

- Remove main journals.

The clearance between the main bearings and the journals
is obtained by comparing the calibrated wire length (2) at the
maximum deflection point, with the calibrated scale on the
coating (1) containing the calibrated wire.

Numbers shown on the scale specify the clearance in
coupling millimeters.

If the clearance obtained is different from the clearance
required, replace the half-bearings and repeat this check.

Checking crankshaft end float

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

F2C CURSOR ENGINES

Base - June 2007

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Engines Iveco C87 / Cursor 87. Manual - part 27