starter motor to cool, then try
staring the engine again.
4.
Once the engine has started, wait
for the oil pressure to rise, and the
low oil pressure warning lamp to
turn off, before increasing rpm.
If the engine does not start, or runs
erratically, see Fuel System Priming.
After the engine is started, the voltmeter, if
equipped, may show a gauge fluctuation
under certain engine temperature
conditions (both warm and cold). This
cycling operation is caused by the post-
heat cycle of the intake manifold heater
system. The number of cycles and the
length of the cycling operation is controlled
by the engine control module. The cycling
action will cause temporary dimming of the
headlamps, interior lamps, and other
vehicle electrical accessories.
Cold Weather Starting
Allow the
Wait-to-Start
warning lamp to
turn off.
on page
17.
Follow this engine starting procedure when
the outside temperature is below 50°F
(10°C).
WARNING
Do not use starting fluids with this en-
gine. This engine is equipped with an
intake air heater: use of starting fluid
can cause an explosion, fire, personal
injury, severe damage to the engine,
and property damage.
CAUTION
Engaging the starter motor for more
than 30 seconds in any 5 minute peri-
od may cause it to overheat and can
damage the starter motor. If starter is
engaged continuously for 30 seconds,
you must wait 5 minutes before trying
to start the engine. This will allow the
starter motor time to cool down.
CAUTION
To reduce the possibility of damage to
the lubricating oil pan, due to the ma-
terials used in the manufacture of the
lubricating oil pan, under no circum-
stances should an external heat
source be applied directly or indirectly
to the lubricating oil pan.
1.
If you have not already, begin by
on page 23 until it
directs you back to step 2 in this
cold weather procedure.
Refer to the vehicle operator's manual
instructions for any additional cold weather
starting procedures.
2.
Allow the 12 volt fuel module pre-
heater to heat the fuel. Leave the
key in the accessory position,
without engaging the starter until
the Wait-To-Start lamp goes out.
NOTE
Under cold conditions, the Wait-to-
Start lamp will also illuminate at key
ON, and will stay on for a period of up
to 30 seconds. The length of time the
Wait-to-Start lamp remains illuminated
depends on the ambient temperature.
The lower the ambient temperature,
the longer the lamp will be illuminated.
ENGINE OPERATION - Operating Instructions
24
Y53-1185-1J1 (10/21)
1
Summary of Contents for PX-9
Page 1: ...Operator s Manual Operator s Manual 2022 Model Year Warranty 2021 Emissions...
Page 2: ......
Page 3: ...PX Operator Manual PACCAR PX 9 Engine...
Page 4: ......
Page 5: ...Engine Operation 1 Engine Maintenance 2 Engine Warranty 3 Contents...
Page 78: ...ENGINE MAINTENANCE Engine Identification Y53 1185 1J1 10 21 75 2...
Page 92: ...ENGINE WARRANTY United States and Canada Engine Warranty Y53 1185 1J1 10 21 89 3...
Page 96: ...Index...
