Perkins 1206A-E70TTA Operation And Maintenance Manual page 60

60
Maintenance Section
General Fuel Information
Perkins recommends a value of density of 841 kg/m3
to obtain the correct power output. Lighter fuels are
acceptable but these fuels will not produce the rated
power.
Sulfur
The level of sulfur is governed by emissions
legislations. Regional regulation, national
regulations, or international regulations can require a
fuel with a specific sulfur limit. The sulfur content of
the fuel and the fuel quality must comply with all
existing local regulations for emissions.
LSD fuel with less than 0.05 percent (≤ 500 ppm (mg/
kg)) sulfur is recommended for use in these engine
models.
ULSD less than 0.0015% (≤15 PPM (mg/Kg)) sulphur
is acceptable to use in these engine models. The
lubricity of these fuels must not exceed wear scar
diameter of 0.52 mm (0.02047 inch) as per "ISO
12156-1". Refer to "Lubricity" for more information.
Fuels with sulphur content higher than 0.05 percent
(500 PPM) can be used where allowed by legislation.
Fuel with a high sulfur content can cause engine
wear. High sulfur fuel will have a negative impact on
emissions of particulates. High sulfur fuel can be
used if the local emissions legislation will allow the
use. High sulfur fuel can be used in countries that do
not regulate emissions.
When only high sulfur fuels are available, high
alkaline lubricating oil must be used in the engine.
Alternatively, the lubricating oil change interval must
be reduced. Refer to Operation and Maintenance
Manual, "Fluid Recommendations (Lubricant
Information)" for information on sulfur in fuel.
Lubricity
Lubricity is the capability of the fuel to prevent pump
wear. The lubricity of the fluid describes the ability of
the fluid to reduce the friction between surfaces that
are under load. This ability reduces the damage that
is caused by friction. Fuel injection systems rely on
the lubricating properties of the fuel. Until fuel sulfur
limits were mandated, the lubricity of the fuel was
believed to be a function of fuel viscosity.
The lubricity has particular significance to the current
low viscosity fuel, low sulfur fuel, and low aromatic
fossil fuel. These fuels are made to meet stringent
exhaust emissions.
The lubricity of these fuels must not exceed wear
scar diameter of 0.52 mm (0.02047 inch). The fuel
lubricity test must be performed on an HFRR,
operated at 60 °C (140 °F). Refer to "ISO 12156-1".
NOTICE
The fuels system has been qualified with fuel having
lubricity up to 0.52 mm (0.02047 inch) wear scar di-
ameter as tested by "ISO 12156-1". Fuel with higher
wear scar diameter than 0.52 mm (0.02047 inch) will
lead to reduced service life and premature failure of
the fuel system.
In the fuels which do not meet specified lubricity
requirement appropriate lubricity additive can be
used to enhance the lubricity of the fuel.
Perkins Diesel Fuel Conditioner U5MK8276 is the
approved additive refer to section, Perkins Diesel
Fuel Conditioner for more information.
Contact your fuel supplier for those circumstances
when fuel additives are required. Your fuel supplier
can make recommendations for additives to use and
for the proper level of treatment.
Distillation
Distillation will give an indication of the mixture of
different hydrocarbons in the fuel. A high ratio of
lightweight hydrocarbons can affect the
characteristics of combustion.
Classification of the Fuels
Diesel engines have an ability to burn wide variety of
fuels. Below is a list of typically encountered fuel
specifications that have been assessed as to their
acceptability and are divided into following
categories:
Group 1: Preferred Fuels
The following fuel specifications are considered
acceptable.
• Fuels that meet the requirements that are listed in
the table 14 .
• "IS 1460 Bharat Stage 2, 3 and 4"
• "EN590 - Grades A to F and class 0 to 4"
• "ASTM D975 Grade No. 1-D and 2-D"
• "JIS K2204 Grades 1, 2 & 3 & Special Grade 3"
acceptable provided lubricity ware scar diameter
does not exceed of 0.52 mm (0.02047 inch) as
per "ISO 12156-1" .
• "BS2869 - Class A2 Off Highway Gas Oil, Red
Diesel"
Note: The lubricity of these fuels must not exceed
wear scar diameter of 0.52 mm (0.02047 inch) as
per "ISO 12156-1" . Refer to "Lubricity".
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