Perkins 402F-05 Operation And Maintenance Manual page 49

SEBU9064
Raw pressed vegetable oils are NOT acceptable for
use as a fuel in any concentration in compression
engines . Without esterification, these oils solidify in
the crankcase and the fuel tank. These fuels may not
be compatible with many of the elastomers that are
used in engines that are manufactured today. In
original forms, these oils are not suitable for use as a
fuel in compression engines . Alternate base stocks
for biodiesel may include animal tallow , waste
cooking oils , or various other feedstocks. In order to
use any of the products that are listed as fuel, the oil
must be esterified .
Fuel made of 100 percent FAME is generally referred
to as B100 biodiesel or neat biodiesel.
Biodiesel can be blended with distillate diesel fuel.
The blends can be used as fuel. The most commonly
available biodiesel blends are B5, which is 5 percent
biodiesel and 95 percent distillate diesel fuel. B20,
which is 20 percent biodiesel and 80 percent distillate
diesel fuel.
Note: The percentages given are volume-based.
The U.S. distillate diesel fuel specification ASTM
D975-09a includes up to B5 (5 percent) biodiesel.
European distillate diesel fuel specification EN590:
2010 includes up B7 (7 percent) biodiesel.
Note: Engines that are manufactured by Perkins are
certified by use of the prescribed Environmental
Protection Agency (EPA) and European Certification
fuels. Perkins does not certify engines on any other
fuel. The user of the engine has the responsibility of
using the correct fuel that is recommended by the
manufacturer and allowed by the EPA and other
appropriate regulatory agencies.
Specification Requirements
The neat biodiesel must conform to the latest
EN14214 or ASTM D6751 (in the USA). The
biodiesel can only be blended in mixture of up to 20%
by volume in acceptable mineral diesel fuel meeting
latest edition of EN590 or ASTM D975 S15
designation.
In United States Biodiesel blends of B6 to B20 must
meet the requirements listed in the latest edition of
ASTM D7467 (B6 to B20) and must be of an API
gravity of 30-45.
In North America biodiesel and biodiesel blends must
be purchased from the BQ-9000 accredited
producers and BQ-9000 certified distributors.
In other areas of the world, the use of biodiesel that is
BQ-9000 accredited and certified, or that is
accredited and certified by a comparable biodiesel
quality body to meet similar biodiesel quality
standards is required.
Engine Service Requirements
Aggressive properties of biodiesel fuel may cause
debris in the fuel tank and fuel lines. The aggressive
properties of biodiesel will clean the fuel tank and fuel
lines. This cleaning of the fuel system can
prematurely block of the fuel filters. Perkins
recommend that after the initial usage of B20
biodiesel blended fuel the fuel filters must be replaced
at 50 hours.
Glycerides present in biodiesel fuel will also cause
fuel filters to become blocked more quickly. Therefore
the regular service interval should be reduced to 250
hours.
When biodiesel fuel is used, crank case oil may be
influenced. This influence is due to the chemical
composition and characteristics of biodiesel fuel,
such as density and volatility, and to chemical
contaminants that can be present in this fuel, such as
alkali and alkaline metals (sodium, potassium,
calcium, and magnesium).
• Crankcase oil fuel dilution can be higher when
biodiesel or biodiesel blends are used. This
increased level of fuel dilution when using
biodiesel or biodiesel blends is related to the
typically lower volatility of biodiesel. The long-term
effect of biodiesel concentration in crankcase oil is
currently unknown.
• Perkins recommend the use of oil analysis in
order to check the quality of the engine oil if
biodiesel fuel is used. Ensure that the level of
biodiesel in the fuel is noted when the oil sample is
taken.
Performance Related Issues
Due to the lower energy content than the standard
distillate fuel B20 will cause a power loss in order of 2
to 4 percent. In addition, over time the power may
deteriorate further due to deposits in the fuel injectors.
Biodiesel and biodiesel blends are known to cause an
increase in fuel system deposits, most significant of
which are deposits within the fuel injector. These
deposits can cause a loss in power due to restricted
or modified fuel injection or cause other functional
issues associated with these deposits.
Note: Perkins T400012 Fuel Cleaner is most
effective in cleaning and preventing the formation of
deposits. Perkins Diesel Fuel Conditioner helps to
limit deposit issues by improving the stability of
biodiesel and biodiesel blends. For more information
refer to "Perkins Diesel Fuel System Cleaner".
49
Refill Capacities
Fluid Recommendations