Nanni T4.155 seriers, Workshop Manual

Page: 178 / 191

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indice A
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c. Subtract the piston pin diameter measurement from the
connecting rod small end bush internal diameter
measurement.
Nominal lubrication clearance: 0.008 – 0.016 mm
Lubrication limits clearance: 0.03 mm
If the lubrication clearance is greater than the maximum dimension,
replace the nozzle. If necessary replace the piston-connecting rod
assembly.
D. If necessary, replace the connecting rod small
end nozzles.
a. Drive out the connecting rod small end nozzle using special
maintenance tool SST and a press
b. Use a fine file to slightly round off the connecting rod small
end edge, working as illustrated in the figure opposite.
c. Install the connecting rod small end nozzle on maintenance
tool SST taking care to fit the rod of the special maintenance
tool SST inside the lubrication hole of the nozzle.
d. Make the lubrication holes of the new connecting rod small
end nozzle and the connecting rod coincide.