Kohler Lombardini LDW FOCS 502 Euro 2, Руководство по обслуживанию

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47
D
V
54
55
56
57
6
d
109,975÷110,025
Ø b - Ø c
0,010÷0,025
0,40
Ø b 20,010÷20,020
Ø c 19,995÷20,000
Ø a 40,020÷40,035
e 55,000÷55,020
A
106,98÷107,02
B - D
0,015÷0,003
0,06
B 18,015÷18,025
D 17,995÷18,000
C 40,021÷40,050
E 50,9÷51,1
Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
6.2.6 Dimensional check and overhaul of connecting
rods
1. Check that the contact surfaces are perfectly clean
and intact.
2. Assemble the cap ( D ) onto the connecting rod big end
and tighten the screws to a torque of 38 Nm (40 Nm
x PROGRESS).
3. Using a micrometer, measure diameters ø a-b .
Important
• If the diameter of the conncting rod small end does not
match the diameter of the wrist pin, the connecting
rods must be replaced to achieve the right match
(see “Table of connecting rod dimensions”).
• The half-bearings are supplied smaller than
the nominal dimensions, by 0,25 mm and
0,50 mm.
• Before replacing the connecting rods,
check that the weight difference does not
exceed 10g to prevent weight imbalances
(see “Table of connecting rod dimensions”).
• Protect the contact surfaces with lubricant
oil, to prevent them from rusting.
6.2.7 Checking parallelism of the
connecting rod axes
1. Insert the wrist pin ( V ) in the connecting rod
small end.
2. Use a dial indicator to check that there is parallelism
between the small end and big end axes. Parallel
deviation, measured at the very tip of the wrist pin,
must not exceed 0.015-0.030mm. If parallel values
do not correspond to those indicated, replace the
connecting rod with an original spare.
3. After carrying out all checks and overhauls, remount
the connecting rods, pistons and sealing rings (see
“Pre-assembly of sealing rings - pistons” and “Pre-
assembly of connecting rods - pistons”).
Important
• Protect the contact surfaces with lubricant oil, to
prevent them from rusting.
connecting
rod small end
connecting
rod
connecting
rod big end
connecting
rod
OVERHAULS AND TUNING
Table of connecting rod dimensions
Réf.
Dimensions
(mm)
Clearance
(mm)
Wear and
tear limit
(mm)
Table of connecting rod dimensions PROGRESS
Réf.
Dimensions
(mm)
Clearance
(mm)
Wear and
tear limit
(mm)