OIL CHANGE
PERIODS
For normal operation of the Perkins engine the oil should be changed every 250 hours or annually whichever is the
sooner.
Under certain circumstances where
a centrifugal oil filter is fitted to the engine and an oil analysis programme
has been carried out with the oil supplier over a period of 1000 hours of
engine operation, it may be possible to extend the oil change period up to
maximum of 350 hours.
To achieve this extended oil
change period, a centrifugal oil filter must be fitted and cleaned every 250
hours between routine oil changes, and at every oil change point i.e. 350 hours
maximum.
As the oil deteriorates it is
essential that the following parameters must not be exceeded at the oil change
point:
1. The viscosity of;the oil must
not increase by more than 10cSt at 100℃.
2. The total base number of the
oil should not reduce to less than 50% of the value of new oil.
3. The flash point of the oil
should exceed 180℃.
4. The water content of the oil
must not exceed l%.
5. The fuel content of the oil
must not exceed l%.
6. Oil samples should be taken
from the mean sump oil level of the engine.
ENGINE
OPERATION
Excessive periods of idling or
repeated cold starts should be avoided, as they will cause excessive dilution
of the oil by fuel, requiring. more frequent oil changes and dangerously lowering
the flash point of the oil.
Should there be a lubricating oil
supply problem, or if the fuel being used contains more than 0.5% sulphur Perkins Engines (Stafford) Limited must be consulted to give advice in
selecting a suitable grade.
The following list gives details
of some of the oils that meet the required specifications, Note that the brand
names may change as oils are upgraded or reformulated.
An up-to-date fist is maintained
by Perkins Engines (Stafford) limited of major oil companies products and
information, which can be obtained from Perkins Engines (Stafford) Service
Department.
WARNING!! Failure to comply with
these instructions will invalidate the warranty offered with the engine, as it
may result in engine damage.
WARNING!! Always stop the engine
and allow the pressurized system to cool before removing the filler cap. Avoid
skin contact with antifreeze by wearing hand protection.
ENGINE
COOLING SYSTEM
To protect the engine cooling
system against corrosion it is essential that the engine coolant contains
suitable additives which will give the necessary protection.
Caution: untreated water is not
suitable.
WATER
QUALITY
The water that is mixed with the
additive must have the following characteristics:
Chloride less than 80 PPMV (parts
per million by volume)
Sulphates less than 80 PPMV
Total hardness less than 200 PPMV
pH of water between 7 to 7.5 (i.e. neutral to slightly alkaline)
ADDITIVES TO
WATER
Due to the complexity. of the
cooling system it is necessary to use an additive that contains a balanced package
.of corrosion inhibitors.
To achieve the required solution
a 50/50 mix of Shell Safe Premium anti-freeze with water should be used at all
times, even in areas where frost is unlikely.
This mixture will give frost
protection down to -35℃. In areas where Shell
anti-freeze is unobtainable contact Perkins Engines (Stafford) Ltd for advice.
Under no circumstances should an
additive containing nitrites, borate, phosphates, chromates, nitrates or
silicates be used, as these materials
are not compatible with the materials used in the cooling system.
When mixing the anti-freeze with
the water always follow the manufacturer's recommendation which is to add the
anti-freeze to water and mix thoroughly before adding the mixture to the engine
cooling system.
Mixing water to the anti-freeze
can lead to the formation of gel in the mixture, due to over concentration, and
this can lead to blockage of water passages and subsequent loss of water flow
causing overheating.
MAINTENANCE OF COOLANT
The water/anti-freeze mixture
should be replaced in operating engines at least once a year.
It is essential to maintain the
coolant at the correct alkalinity level i.e. the pH should not increase above
7.5. A hydrometer only shows the proportion of ethylene glycol. This is not a
measure of protection against corrosion.
WARNING!! Failure to follow the
above recommendations may result in engine damage and will invalidate the
engine warranty.
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