Paccar PX-7, Operator'S Manual

Page: 61 / 92

Fuel Filter
Perform these maintenance procedures
according to the Preventative Maintenance
Schedule.
WARNING
When removing the fuel filter, a quanti-
ty of fuel will escape. DO NOT smoke
or allow an open flame in close prox-
imity. Failure to do so could ignite a
fire or cause an explosion which could
result in serious injury to you and/or
bystanders. Failure to comply may re-
sult in death, personal injury, equip-
ment or property damage.
CAUTION
Replace engine and chassis-mounted
fuel filters with parts of the same part
number.
PACCAR periodically
changes its filter design, and filters of
different part numbers are not inter-
changeable. Use of incorrect filter part
numbers or non-genuine filters can re-
sult in low pressure fuel fault codes
and/or severe engine damage. Con-
tact a Kenworth or Peterbilt dealer to
verify the correct fuel filter part num-
bers.
NOTE
The fuel filter and the hand pump are
located on the left-hand side of the en-
gine, as viewed from the driver's seat.
NOTE
Use of poor quality fuel may require
more frequent fuel filter element serv-
ice.
Description
The fuel filter/water separator module
provides fine-particle filtration, water
separation, water-in-fuel sensing,
automatic water draining, lifetime
purification of drained water with a
charcoal filter, 12V preheating and system
manual priming in a singular easy to
service module.
Replace the suction side and the pressure
side fuel filters at the same time. It is
recommended to replace the fuel filters at
the same interval as the oil and oil filter are
changed. If the oil drain interval being used
is greater than 15,000 mi (24,000 km), as
determined by the Engine Lubrication and
Filter Intervals, the fuel filter change can be
extended until the oil drain interval.
NOTE
The engine and fuel module should be
operated in cold climates with accepta-
ble cold climate fuel blends which no-
ticeably reduces wax gelling in the fuel
filter cartridge. The fuel module in-
cludes a 12V pre-heater to support
pre-heating of the fuel for initial start-
up in mild climates. Failure to operate
with acceptable cold climate fuel may
result in insufficient fuel flow to the fuel
injection system.
Biodiesel
For information on alternative fuels, such
as biodiesel, and additional information for
fuel recommendations and specifications
refer to "Fuels for Cummins® Engines,"
Bulletin 3379001.
For information on alternative fuels, such
as biodiesel, and additional information for
fuel recommendations and specifications,
ENGINE MAINTENANCE - Maintenance Procedures
Y53-1183-1G1 (05/19) 59
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