operators_manual

Engine Operating Range
Information on operating the engine at
proper RPM.
CAUTION
Operating the engine at full throttle be-
low peak torque
will shorten engine life
to overhaul, can cause serious engine
damage, and is considered engine
abuse. DO NOT operate the engine at
full throttle operation below peak tor-
que rpm for more than 30 seconds.
Failure to comply may result in equip-
ment or property damage.
PACCAR engines are designed to operate
at full throttle under momentary conditions
down to peak torque engine speed. This is
consistent with recommended operating
practices.
CAUTION
Operating the engine beyond the max-
imum engine speed
can cause severe
engine damage. Use proper operating
techniques for the vehicle to prevent
engine overspeed. See Engine Speci-
fications for maximum engine speed.
Failure to comply
may result in equip-
ment or property damage.
NOTE
For applications with high idle-time, to
help reduce soot
loading in the after-
treatment system, avoid long periods
of idling. If idling is required, increase
idle-speed using the cruise control
function.
Engine Shutdown
Before stopping the engine follow these
precautions.
NOTE
DO NOT shut off the engine immedi-
ately. A
hot engine stores a great
amount of heat and it does not cool
down immediately after it is shut off.
Always cool the engine down before
shutting it off. You will greatly increase
its service life.
Idle the engine at 1,000 RPM for four
minutes. Then low idle for 30 seconds
before shutdown. This will allow circulating
coolant and lubricating oil to carry heat
away from the cylinder head, valves,
pistons, cylinder liners, turbocharger, and
bearings. This way you can prevent engine
damage that may result from uneven
cooling.
Electromagnetic Interference
Information on electromagnetic
interference (EMI).
If not installed correctly, some vehicle
accessories (CB radios, mobile
transmitters, etc.) can generate and use
radio frequency energy that may cause
electromagnetic interference (EMI)
between the accessory and the
electronically controlled fuel system. Under
these conditions, P
ACCAR is not liable for
any performance problems with either the
fuel system or the accessory. EMI is not
considered by PACCAR to be an engine
failure and therefore is not warrantable.
System EMI Susceptibility
PACCAR products are designed and
tested for minimum sensitivity to incoming
electromagnetic energy. The fuel system
ENGINE OPERATION - Operating Instructions
22 Y53-1181-1K1 (08/2018)
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