Operation and maintenance manual

78 SEBU8601-01
Maintenance Section
Refill Capacities
The chemical li
mits were developed in order
to maintain the expected life of the engine
aftertreatment system. The performance of the
engine aftert
reatment system can be adversely
affected if oil that is not specified in table 18 is used.
Thelifeofyo
ur Aftertreatment system is defined by
the accumulation of ash on the surface of the filter.
Ash is the inert part of the particulate matter. The
system is de
signed in order to collect this particulate
matter. There is a very small percentage of p articulate
matter that is left behind as the soot is burnt. This
matter will
eventually block the filter, causing loss
of performance and increased fuel consumption.
Most of the ash comes from the engine oil which is
gradually
consumed during normal operation. This
ash is passes through the exhaust. To meet the
designed life of the product, the use of the appropriate
engine oil
is essential. The oil specification that is
listed in table 18 has low ash content.
Maintena
nce intervals for engines that use
biodiesel – The oil change interval can be adversely
affected by the use of biodiesel. Use oil analysis in
order to m
onitor the condition of the engine oil. Use
oil analysis also in order to determine the oil change
interval that is optimum.
Note: These engine oils are not approved by
Perkins and these engine oils must not be
used:CC
, CD, CD-2, CF-4, CG-4, CH-4, and CI-4.
Lubricant Viscosity Recommendations
for Dir
ect Injection (DI) Diesel Engines
The correct SAE viscosity grade of oil is determined
by the
minimum ambient temperature during
cold engine start-up, and the maximum ambient
temperature during engine operation.
Refertoillustration43(minimumtemperature)in
order to determine the required oil viscosity for
star
ting a cold engine.
Refertoillustration43(maximumtemperature)in
orde
r to select the oil viscosity for engine operation at
the highest ambient temperature that is anticipated.
Gen
erally, use the highest oil viscosity that is
available to meet the requirement for the temperature
at start-up.
g02210556
Illustration 43
Lubricant Viscosities
Supplemental heat is recommended for cold so aked starts below
the minimum ambient temperature. Supplemental heat may be
required for cold soaked starts that are above the m inimum
temperature that is stated, depending on the paras itic load and
other factors. Cold s oaked starts occur when the engine has not
been operated for a period of time. This interval will allow the oil to
become more viscous due to cooler ambient temperatures.
Aftermarket Oil Additives
Perkins does not recommend the use of aftermarket
additives in oil. It is not necessary to use aftermarket
additives in order to achieve the engines 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 industry standard tests that evaluate
the performance or the compatibility of aftermarket
additives in finished oil. Aftermarket additives may
not be compatible with the finished oils additive
package, which could lower the performance of the
finished oil. The aftermarket additive could fail to mix
with the finished oil. This failure 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:
•
See the appropriate “Lubricant Viscosities”. Refer
totheillustration43inordertofind the correct oil
viscosity grade for your engine.
•
At the specified interval, service the engine. Use
new oil and install a new oil filter.