operators_manual

you may see it when the engine grid heater
is on and needs some time to warm up.
(PACCAR PX and Cummins ISL engines)
NOTE
Some engines are equipped with an
engine starting motor protection fea-
ture. If the starting motor is engaged
for 30 or more seconds, without the
engine starting, the starter will be
locked out from operating, allowing for
proper cooling of the starting motor.
During this time, the 'Wait-To-Start'
lamp will flash for 2 minutes. Once the
lamp stops flashing, the starting motor
will be allowed to function.
Engine Braking System
Information on using the engine braking
system.
An engine compression brake is standard
on the PX-7 engines. Optionally, this
engine may be equipped with an exahust
brake. When activated, these devices
create a braking effect on the drive wheels.
Because it can help keep your vehicle’s
brakes from overheating, it can save wear
and tear on the service brakes. However,
the engine compression or exhaust brake
is not an emergency brake or the primary
vehicle brake.
WARNING
DO NOT operate the engine compres-
sion brake when driving/operating your
vehicle bobtail or with a loaded or un-
loaded trailer on road surfaces with
poor traction (wet, icy, or snow cov-
ered roads) or in heavy traffic. There
may not be enough weight on the rear
axle to provide traction. Braking
caused by the normal operation of the
engine compression brake could
cause you to lose control of the vehi-
cle, resulting in an injury accident.
Make sure the engine brake is switch-
ed "OFF" when bobtailing or with an
unloaded trailer. Failure to comply may
result in death, personal injury, equip-
ment or property damage.
WARNING
The service brakes must be used in an
emergency. The engine compression
brake alone might not stop the vehicle
fast enough to prevent an accident.
The engine compression brake is NOT
intended as the primary brake for the
vehicle, nor is it an emergency brake.
The engine compression brake only
helps the service brakes by using en-
gine back pressure to slow the drive-
train. Use the service brakes for quick
stops. You could be seriously injured if
you relied only on the engine compres-
sion brake to stop the vehicle in an
emergency. Failure to comply may re-
sult in death, personal injury, equip-
ment or property damage.
CAUTION
DO NOT operate the engine brake un-
til the engine oil temperature is above
86°F (30°C). Operation below 86°F
(30°C) could cause severe damage to
the engine. Idle the engine four mi-
nutes at approximately 1,000 rpm to
warm the engine before activating the
engine brakes.
ENGINE OPERATION - Operating Instructions
18 Y53-1183-1E1 (04/16/18)
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