Lombardini LDW 502, Service Manual

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service manual
mod. 051135
7
– 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.
– Before any intervention, the operator should lay out all
equipment and tools in such a way as to enable him to
carry out operations correctly and safely.
7.1 RECOMMENDATIONS FOR INSTALLING THE ASSEMBLIES
7.2 PRE-ASSEMBLY OF SEALING RINGS-PISTONS
– Thoroughly clean the pistons and lubricate
the coupling areas.
– Put the sealing rings on the piston in the order
shown in the figure.
Important
– Place the sealing rings with the markings
facing up towards the upper part of the
piston (crown).
– Keep the pistons together with their own
connecting rods and wrist pins.
– 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
appropriate 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.
INSTALLATION OF ASSEMBLIES