Engines Iveco C87 / Cursor 87. Manual — part 29
115884
Figure 53
1. Coloured mark for identifying weight - 2. Coloured mark for identifying diameter grade - 3. Positioning stud visible from
the front of the engine - 4. Progressive number for identifying connecting rod
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
31
F2C CURSOR ENGINES
WEIGHT
DIAMETER
GRADE A
∅ 85.987-85.996
Yellow
GRADE A
Yellow
3450 g - 3470 g
∅ 85.997-86.005
Green
Yellow
g
g
∅ 86.006-86.013
Blue
GRADE B
∅ 85.987-85.996
Yellow
GRADE B
Green
3471 g - 3490 g
∅ 85.997-86.005
Green
Green
g
g
∅ 86.006-86.013
Blue
GRADE C
∅ 85.987-85.996
Yellow
GRADE C
Blue
3491 g - 3510 g
∅ 85.997-86.005
Green
Blue
g
g
∅ 86.006-86.013
Blue
Check the torsion of the connecting rod (5) by comparing
two points (A and B) of the pin (3) on the horizontal plane
of the axis of the connecting rod.
Position the mount (1) of the dial gauge (2) so that this
pre-loads by approx. 0.5 mm on the pin (3) at point A and
zero the dial gauge (2). Shift the spindle (4) with the
connecting rod (5) and compare any deviation on the
opposite side B of the pin (3): the difference between A and
B must be no greater than 0.08 mm.
61696
Checking axis alignment
Check the alignment of the axes of the connecting rods (1)
with device (5), proceeding as follows:
- Fit the connecting rod (1) on the spindle of the tool (5)
and lock it with the screw (4).
- Set the spindle (3) on the V-prisms, resting the
connecting rod (1) on the stop bar (2).
Figure 54
Figure 55
Checking torsion
61694
Checking connecting rod alignment
(demonstrative)
(demonstrative)
32
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F2C CURSOR ENGINES
Base - June 2007
Check the bending of the connecting rod (5) by comparing
two points C and D of the pin (3) on the vertical plane of the
axis of the connecting rod.
Position the vertical mount (1) of the dial gauge (2) so that
this rests on the pin (3) at point C.
Swing the connecting rod backwards and forwards seeking
the highest position of the pin and in this condition zero the
dial gauge (2).
Shift the spindle (4) with the connecting rod (5) and repeat
the check on the highest point on the opposite side D of the
pin (3). The difference between point C and point D must be
no greater than 0.08 mm.
49029
Figure 56
Figure 57
To fit the piston rings (1) on the piston (2) use the pliers
99360184 (3).
The rings need to be mounted with the word ”TOP” (4)
facing upwards. Direct the ring openings so they are
staggered 120
° apart.
Mounting the connecting rod - piston assembly
Carry out the steps for removal described on pages 27 and
28 in reverse order.
The connecting rod screws can be reused as long
as the diameter of the thread is not less than 11.4
mm.
Mounting the piston rings
Checking bending
61695
(demonstrative)
Figure 58
117694
NOTE
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
33
F2C CURSOR ENGINES
47593
Figure 59
Figure 60
Figure 61
Fit the half-bearings (1), selected as described on pages 19
to 24, both on the connecting rod and on the stand.
- all pistons belong to the same class, A or B;
- ideogram stamped on the piston crown is placed toward
the engine flywheel, or the cavity, on the piston cover,
corresponds to the position of the oil spray nozzles.
61831
Connecting rod-piston assembly
Marking area on the piston crown of ideogram
specifying the assembly position and the
selection class
Connecting rod marking area (see Figure 53).
1
2
3
Fit the connecting rod-piston assemblies (1) into the piston
liners (2) using band 99360605 (1, Figure 61). Check the
following:
- the openings of the split rings are offset by 120
°;
As spares, class A pistons are provided and can be
fitted also to cylinder barrels belonging to class B.
Piston protrusion check
Once assembly is complete, check piston protrusion from
cylinder barrels: it must be 0.873 to 1.177 mm.
NOTE
Fitting the connecting rod-piston assembly
into the piston liners
115885
If the cap (1) is fitted upsidedown, the connecting
rod should be discarded.
34
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F2C CURSOR ENGINES
Base - June 2007
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