SEBU8191-01 35
Maintenance Section
Refill Capacities
Perkins strong
ly recommended that seasonally
operated engines have the fuel systems, including
fuel tanks, flashed with conventional diesel fuel
before prolon
ged shutdown periods. An example of
an application that should seasonally flush the fuel
system is a combine harvester.
Microbial contamination and growth can cause
corrosion in the fuel system and premature plugging
of the fuel fi
lter. Consult your supplier of fuel for
assistance in selecting appropriate anti-microbial
additive.
Water accelerates microbial contamination and
growth. When biodiesel is compared to distillate
fuels, wat
er is naturally more likely to exist in the
biodiesel. It is therefore essential to check frequently
and if necessary, drain the water separator.
Materials such as brass, bronze, copper, lead, tin,
and zinc accelerate the oxidation process of the
biodiese
l fuel. The oxidation process can cause
deposits formation therefore these materials must not
be used for fuel tanks and fuel lines.
Cooling System Specifications
General Coolant Information
NOTICE
Never add coolant to an overheated engine. Engine
damage could result. Allow the engine to cool first.
NOTICE
If the
engine is to be stored in, or shipped to an area
with below freezing temperatures, the cooling system
must be either protected to the lowest outside temper-
atur
e or drained completely to prevent damage.
NOTICE
Frequently check the specific gravity of the coolant for
proper freeze protection or for anti-boil protection.
Cle
an the cooling system for the following reasons:
•
Contamination of the cooling system
•
Overheating of the engine
•
Fo
aming of the coolant
NOTICE
Never operate
an engine without water temperature
regulators in the cooling system. Water temperature
regulators help to maintain the engine coolant at the
proper operat
ing temperature. Cooling system prob-
lems can develop without water temperature regula-
tors.
Many engine
failures are related to the cooling
system. The following problems are related to cooling
system failures: Overheating, leakage of the water
pump, and pl
ugged radiators or heat exchangers.
These failures can be avoided with correct cooling
system mai
ntenance. Cooling system maintenance is
as important as maintenance of the fuel system and
the lubrication system. Quality of the coolant is as
important
as the quality of the fuel and the lubricating
oil.
Coolant i
s normally composed of three elements:
Water, additives, and glycol.
Water
Waterisusedinthecoolingsysteminorderto
transfe
r heat.
Distilled water or deionized water is
recomm
ended for use in engine cooling s ystems.
DO NOT use the following types of water in cooling
system
s: Hard water, softened water that has been
conditioned with salt, and sea water.
If dis
tilled water or deionized water is not available,
use water with the properties that are listed in Table
13.
Tabl
e13
Acce
ptable Water
Property Maximum Limit
Chloride (Cl) 40 mg/L
Sulfate (SO
4
)100mg/L
Total Hardness 170 mg/L
Total Solids 340 mg/L
Acidity pH of 5.5 to 9.0
For a water analysis, consult one of the following
sources:
•
Local water utility company
•
Agricultural agent
•
Independent laboratory
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