SEBU8337 53
Maintenance Section
Refill Capacities
Aftermarket Oi
l A dditives
Perkins does not recommend the use of aftermarket
additives in o
il. It is not necessary to use aftermarket
additives in order to achieve the engine’s maximum
service life or rated performance. Fully formulated,
finished oils
consist of base oils and of commercial
additive packages. These additive packages are
blended into the base oils at precise percentages in
order to help
provide finished oils with performance
characteristics that meet industry standards.
There are no i
ndustry standard tests that evaluate
the performance or the compatibility of aftermarket
additives in finished oil. Aftermarket additives may
not be compa
tible with the finished oil’s additive
package, which could lower the performance of the
finished oil. The aftermarket additive could fail to
mix with the
finished oil. This could produce sludge
in the crankcase. Perkins discourages the use of
aftermarket additives in finished oils.
To achieve the best performance from a Perkins
engine, conform to the following guidelines:
•
Select the correct oil, or a commercial oil that meets
the “EMA Recommended Guideline on Diesel
Engine Oi
l” or the recommended API classification.
•
See the appropriate “Lubricant Viscosities” table in
order to fi
nd the correct oil viscosity grade for your
engine.
•
At the spe
cified interval, service the engine. Use
new oil and install a new oil filter.
•
Perform m
aintenance at the intervals that are
specified in the Operation and Maintenance
Manual, “Maintenance Interval Schedule”.
Oil analysis
Some eng
ines may be equipped with an oil sampling
valve. If oil analysis is required the oil sampling valve
is used to obtain samples of the engine oil. The oil
analysi
s will complement the preventive maintenance
program.
The oil a
nalysis is a diagnostic tool that is used to
determine oil performance and component wear
rates. Contamination can be identified and measured
throug
h the use of the oil analysis. The oil analysis
includes the following tests:
•
The Wea
r Rate Analysis monitors the wear of the
engine’s metals. The amount of wear metal and
type of wear metal that is in the oil is analyzed. The
increa
se in the rate of engine wear metal in the
oil is as important as the quantity of engine wear
metal in the oil.
•
Tests are condu
cted in order to detect
contamination of the oil by water, glycol or fuel.
•
The Oil Condit
ion Analysis determines the loss of
the oil’s lubricating properties. An infrared analysis
is used to compare the properties of new oil to the
properties o
f the used oil sample. This analysis
allows technicians to determine the amount of
deterioration of the oil during use. This analysis
also allows t
echnicians to verify the performance
of the oil according to the specification during the
entire oil change interval.
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