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6
REASSEMBLY
RECOMMENDATIONS FOR REASSEMBLING
– Information is given in a logical order in terms of timing and
sequence of operations.
The methods have been selected, tested and approved by
the manufacturer's technical experts.
– This chapter describes procedures for installing assemblies
and/or individual components that have been checked,
overhauled or replaced with original spare parts.
Important
To locate specific topics, the reader should refer to the
index.
–
The operator must wash, clean and dry components and
assemblies before installing them.
–
The operator must make sure that the contact surfaces are
intact, lubricate the coupling parts and protect those that are
prone to oxidation.
101
102
- 48 -
Crankshaft
After lubricating the crankshaft and the main bearing, insert the cran-
kshaft into the crankcase support, as shown in the figure.
Piston
1
Lubricate the following parts with oil before mounting: the piston pin,
the piston, the cylinder and the big-end bearing
Connect piston to connecting rod, lubricate piston pin and introduce
it into the piston / connecting rod assembly by exerting pressure with
your thumb (fig.104).
Fit both piston pin circlips 1 and check that they are well seated.
103
– Before any intervention, the operator should lay out all equi-
pment and tools in such a way as to enable him to carry out
operations correctly and safely.
– For safety and convenience, you are advised to place the
engine on a special rotating stand for engine overhauls.
– Before proceeding with operations, make sure that appro-
priate safety conditions are in place, in order to safeguard
the operator and any persons involved.
– In order to fix assemblies and/or components securely, the
operator must tighten the fastening parts in a criss-cross or
alternating pattern.
– Assemblies and/or components with a specific tightening
torque must initially be fastened at a level lower than the
assigned value, and then subsequently tightened to the final
torque.
Caution – Warning
Workshop Manual KD 441_cod. 1.5302.865_2
nd
ed_ rev. 01.
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