Nanni T4.155 seriers, Workshop Manual

Page: 188 / 191

60300140 (
indice A
) 4 CYLINDERS WORKSHOP MANUAL 188/191
a. Lightly coat the threading and the top of crankshaft bearing
cap assembly bolts with engine oil.
b. Reinstall and evenly tighten the ten assembly bolts of the
crankshaft bearing caps to the torque indicated in
compliance with the numbered tightening order, working in
several stages.
Recommended tightening torque: 49 N.m (500 kgf.cm)
All crankshaft bearing cap nuts not in compliance with specifications
must be replaced.
c. Identify the front of the crankshaft bearing cap assembly
bolts with paint.
d. Retighten the crankshaft bearing cap assembly bolts 90°,
working in the numbered order opposite.
e. Verify that the paint mark is still held directed 90° towards
the front.
f. Verify that the crankshaft turns normally.
g. Measure the crankshaft thrust bearing clearance.
7. REINSTALL THE PISTON-CONNECTING ROD
ASSEMBLIES
With a segment compression collar, correctly install each piston-
connecting rod assembly in its corresponding cylinder in compliance
with the matched pairing, taking care to direct the front mark of the
piston head towards the front.