MAINTENANCE, LUBRICATION AND SERVICE
ENGINE
Precautions and Warnings
WARNING
Misuse or modication of a turbocharger
can result in serious injury and property
damage. In addition, extreme care must
be taken to avoid foreign material
induction, excessive exhaust
temperatures and lack of lubrication.
CAUTION
The maximum allowable engine speed is
listed on the warning label on the sun
visor. DO NOT exceed 2,300 rpm.
CAUTION
If a winterfront is needed, use only a
winterfront that was designed for this
specic chassis. Winterfronts are not
recommended, but can be used during
cold weather with sustained temperatures
below -25°C (-13°F).
CAUTION
Be sure to avoid high intake/exhaust
temperatures when using winterfronts
under normal operating conditions (above
freezing). The restriction of airow can
cause higher exhaust temperatures,
power loss, excessive fan usage and
reduced fuel economy.
CAUTION
If a winterfront is used, a Mack-approved
exhaust pyrometer must be installed and
closely monitored while the engine is in
operation. Do NOT exceed the maximum
temperature indicated by the red line on
the gauge. To reduce exhaust
temperature, downshift or reduce engine
power and open the winterfront.
CAUTION
Do not permit a heavy load to drive the
engine above the governed speed.
CAUTION
Operate in a gear low enough to allow the
engine to accelerate to (or maintain)
governed speed when applying the
throttle.
DANGER
Before working on or inspecting a vehicle,
set the parking brakes, place the
transmission in neutral and block the
wheels. Failure to do so can result in
unexpected vehicle movement and can
cause serious personal injury or death.
DANGER
DO NOT attempt to repair or service this
vehicle without having sufcient training,
correct service literature and the proper
tools. Failure to follow this could lead to
personal injury or death, or making your
vehicle unsafe.
NOTE
Read all safety information before working
on the vehicle.
NOTE
Do NOT use extended-life coolant in
engines equipped with a coolant
conditioner lter. A coolant lter that
contains no supplemental coolant
additives (SCA) is available for use when
extended-life coolant is used.
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