Technical information
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Workshop Manual__3 - 4 LD_cod. ED0053025560_4° ed_ rev. 03
Oil-bath air lter (standard)
Danger – Attention
Always wear protective goggles if compressed air is used.
Caution – Warning
Never use solvents with a low ash point to clean the lter ele-
ment. Such action could cause an explosion.
Oil-bath type with double ltering mass.
The lower mass is made of metal, while the upper is made of
polyurethan.
Check the gasket conditions and replace them in case they are
damaged.
Make sure that the weldings are not damaged.
Carefully clean the lower body and the ltering masses using
some gas oil, blow the lower mass with compressed air and dry
the upper mass by means of a cloth. Fill with engine oil lter to
the indicated level.
While reassembling, tighten the nuts at 25 Nm (3LD450,
3LD510, 3LD450/S, 3LD 510/S), at 30 Nm (4LD 640, 4LD 705,
4LD 820)
Details:
1 Upper body 4External sealing ring
2 Filtering mass made 5 Filterning mass
of polyurethan
3 Internal sealing ring 6 Bowl
Silencer (standard)
Danger – Attention
Allow the exaust manifold to cool before demounting it in order
to preventscorchingand burns
Make sure that it is free from any carbon and oily residues, if
contaminated, replace it. While reassembling it, replace the
gaskets and tighten the brass nuts at 25 Nm.
RECOMMENDATIONS FOR DISASSEMBLING
Important
To locate specic topics, the reader should refer to the index.
– 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.
– 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.
DISASSEMBLY / REASSEMBLY