19
INERT IMPURITIES IN FUEL
Others impurities than microorganisms and bacteria do
exist : they are rust debris falling out from the internal
walls of the metal tanks. Some types of fiberglass tanks
are also subject to osmosis over time and tiny particles
may come off internal walls and circulate in the diesel
fuel. These impurities can pass through the filters and
creep into the injection system and cause a total failure
of the engine which is not covered by Nanni Industries
warranty.
DIESEL LUBRICANTS
PRECAUTIONS TO UNDERTAKE
Engine oils must be handled with care, both for reasons
of safety and the risk of pollution for the environment.
Due to their inertia, hot oils retain a higher temperature
than expected. A hot oil can cause severe burns on
the skin and leave after effects. This phenomenon is
emphasized when draining used oil. Wear protective
gloves and eye protective glasses. Avoid synthetic
clothing.
To avoid introducion of impurities into the engine
during filling or topping up, be sure to thoroughly clean
the filler inlet hole first and use a container free of any
contamination.
OILS RECOMMENDED OR AUTHORIZED
It is necessary to differentiate the breaking-in oils
from the lubricating oils after running-in. All engine
manufacturers do not have the same recommendations.
User manuals provide information about proper oils
to use for running-in (if recommended) and at which
running hours and of time lapse of run.
GENERALITIES
The oil used in the engine must have a viscosity in
accordance with the ambient temperatures at which
the engine is operated, according to API (American
Petroleum Institute) and SAE (Society of Automotive
Engineers) classifications.
Following the entry into force of strict antipollution
regulations, engine oils have been developed for use
with low sulphur fuels (LSD or ULSD). The oils classified
“CF” being now obsolete, use oils “CJ-4, CI-4, CH-4”.
The oils “CH-4” do come in replacement of the “CD, CJ,
CF-4 and CG- 4“. In all cases, the use of high sulphur
fuel significantly reduces the span between oil changes
whichever oil is used.
S03
FLUIDS
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