Paccar MX-13, Operator'S Manual

Page: 56 / 111

Maintenance Specifications
5
NOTE
PACCAR recommends that the
cetane number of diesel fuel be a
minimum of 45 for engines that are
expected to operate at temperatures
below 32°F (0°C) and a minimum of
42 for engines that are operated at
temperatures above 32°F (0°C).
Using diesel fuel with a
lower-than-recommended cetane
number can cause hard starting,
instability, and excessive white smoke.
To maintain satisfactory operation
at low ambient temperatures, it is
important to specify diesel fuel of the
correct cetane number.
PACCAR requires all permissible
fuels to have adequate fuel lubricity.
Lubricity can be determined by ASTM,
specification D6079, ISO 12156, High
Frequency Reciprocating Rig (HFRR)
in which the fuel must have a wear scar
diameter of 0.02 in. (0.5 mm) or less.
The use of Ultra-Low-Sulfur diesel
fuel is required for this engine in
order to meet emission regulations
and to prevent damage to the engine
and exhaust system. The use of
other grades of diesel fuels other
than Ultra-Low-Sulfur diesel fuel will
be considered a use of incorrect
fuel for the engine. PACCAR is not
responsible for failures caused by the
use of incorrect fuel, oil or catalytic
reagent or by water, dirt or other
containments in the fuel or catalytic
reagent.
Warranty and the Use of
Biodiesel Fuel
PACCAR Inc approves the use of
biodiesel fuel blends up to 5% by
volume in diesel fuel that meets all of
the following three conditions:
•
The biodiesel used in the blend
meets ASTM Standard D 6751 or
EN 14214 specifications.
•
The biodiesel used in the blend
is sourced from a BQ-9000
Accredited Producer.
•
The finished blend meets the fuel
properties of ASTM Standard D
975 or EN 590 specifications.
The use of approved biodiesel fuel
does not affect the PACCAR engine
warranty. Failures caused by the use
of nonapproved biodiesel fuels or other
fuel additives that are of unacceptable
quality or do not meet specified
industry standards are not considered
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