Paccar PX-9, Operator'S Manual

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CAUTION
If ultra-low-sulfur diesel (ULSD) fuel is
not used, the engine may not meet
emission regulations, and damage
may occur to the engine aftertreatment
system. The use of high-sulfur diesel
fuel will damage the engine aftertreat-
ment system and impact the engine
emission. ULSD fuel is required for
correct operation of the aftertreatment.
The engine has been optimized for
use with an engine aftertreatment sys-
tem together with ULSD fuel to meet
the 2013 U.S. Environmental Protec-
tion Agency regulations. Failure to
comply may result in equipment or
property damage.
NOTE
PACCAR recommends that the cetane
number of diesel fuel be a minimum of
45 for engines that are expected to op-
erate at temperatures below 32ºF
(0ºC) and a minimum of 42 for engines
that are operated at temperatures
above 32ºF (0ºC).
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 (ULSD)
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 ULSD 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
DEF or by water, dirt or other contaminants
in the fuel or DEF.
Warranty and the Use of
Biodiesel Fuel
PACCAR Inc. approves the use of
biodiesel fuel blends up to 20 percent by
volume in diesel fuel providing that the
following conditions are met:
• The biodiesel used in the blend
meets ASTM Standard D6751 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 the ASTM Standard
D975 (up to B5 blend) or D7467
(B6 to B20 blend).
• If using B6-B20 the engine oil and
oil filter are changed per the
modified schedule. See the
Preventative Maintenance
Schedule.
• If using B6-B20 the fuel filter is
changed every 25,000 miles
(40,000 km).
The use of approved biodiesel fuel does
not affect the PACCAR engine warranty.
Failures caused by the use of non-
ENGINE MAINTENANCE - Warranty and the Use of Biodiesel Fuel
Y53-1185-1J1 (10/21) 53
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