Operation and maintenance manual

SEBU7833-03 41
Maintenance Section
Refill Capacities
Some synthetic
base oils have performance
characteristics that enhance the service life of the
oil. Perkins does not recommend the automatic
extending of t
he oil change intervals for any type of
oil.
Re-refined ba
se stock oil
Re-refined base stock oil are acceptable for use in
Perkins engi
nes if these oils meet the performance
requirements that are specified by Perkins.Re-refined
base stock oil can be used exclusively in finished oil
or in a combin
ation with new base stock oil . The US
military specifications and the specifications of other
heavy equipment manufacturers also allow the use of
re-refined b
ase stock oil that meet the same criteria.
The process that is used to make re-refined base
stock oil sh
ould adequately remove all wear metals
that are in the used oil and all the additives that
are in the used oil. The process that is used to
make re-re
fined base stock oil generally involves the
process of vacuum distillation and hydrotreating the
used oil. Filtering is adequate for the production of
high quali
ty, re-refined base stock oil.
Lubricants for Cold Weather
When an engine is started and an engine is operated
in ambient temperatures below −20 °C (−4°F),use
multigra
de oils that are capable of flowing in low
temperatures.
These oil
s have lubricant viscosity grades of SAE
0W or SAE 5W.
When an en
gine is started and operated in ambient
temperatures below −30 °C (−22 °F), use a synthetic
base stock multigrade oil with an 0W viscosity grade
or with a
5W viscosity grade. Use an oil with a pour
point that is lower than −50 °C (−58 °F).
The numb
er of acceptable lubricants is limited in
cold weather conditions. Perkins recommends the
following lubricants for use in cold weather conditions:
First Choice – Use oil with an EMA DHD-1
Recommended Guideline. Use a CH-4 oil that has
an API l
icense. The oil should be either SAE 0W20,
SAE 0W30, SAE 0W40, SAE 5W30, or SAE 5W40
lubricant viscosity grade.
Second Choice – Use an oil that has a CH-4
additive package. Although the oil has not been
tested
for the requirements of the API license, the oil
must be either SAE 0W20, SAE 0W30, SAE 0W40,
SAE 5W30, or SAE 5W40.
NOTICE
Shortened engi
ne service life could result if second
choice oils are used.
Aftermarket Oil Additives
Perkins does not recommend the use of aftermarket
additives in oil. It is not necessary to use aftermarket
additives in o
rder to achieve the engine’s maximum
service life or rated performance. Fully formulated,
finished oils consist of base oils and of commercial
additive pac
kages. These additive packages are
blended into the base oils at precise percentages in
order to help provide finished oils with performance
characteris
tics that meet industry standards.
There are no industry standard tests that evaluate
the performa
nce or the compatibility of aftermarket
additives in finished oil. Aftermarket additives may
not be compatible with the finished oil’s additive
package, wh
ich 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 cran
kcase. 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 Oil” or the recommended API classification.
•
See the appropriate “Lubricant Viscosities” table in
order to find the correct oil viscosity grade for your
engine.
•
At the specified interval, service the engine. Use
new oil an
dinstallanewoilfilter.
•
Perform maintenance at the intervals that are
specified
in the Operation and Maintenance
Manual, “Maintenance Interval Schedule”.
S·O·S Oil
analysis
Some engines may be equipped with an oil sampling
valve. I
f S·O·S oil analysis is required the oil sampling
valve is used to obtain samples of the engine oil. The
S·O·S oil analysis will complement the preventive
mainten
ance program.
The S·O·S oil analysis is a diagnostic tool that is used
to deter
mine oil performance and component wear
rates. Contamination can be identified and measured
through the use of the S·O·S oil analysis. The S·O·S
oil ana
lysis includes the following tests: