Engine Break-In - freightliner Cargo Manual

The two most commonly used terms associated with
preparation of equipment for low temperature operation
are "winterization" and "arctic specifications."
Winterization of the engine and/or components, so that
starting and operating are possible in the lowest tem-
perature to be encountered, requires:
• Adequate lubrication with low-temperature lubri-
cating oils.
• Protection from the cold air (insulation). The
metal temperature does not change, but the rate
of heat dissipation is affected.
• Fuel of the proper grade for the lowest tempera-
ture.
• Using a block heater to raise the engine block
and component temperatures to at least –25°F
(–32°C) for starting in lower temperatures.
• Electrical equipment capable of operating in the
lowest expected temperature. All switches, con-
nections, and batteries in the electrical system
should be inspected, and kept in good condition
to prevent losses through poor contacts.
Arctic specifications refer to the design of mate-
rial and specifications of components necessary
for satisfactory engine operation in extremely low
temperatures to –64°F (–53°C). Contact the near-
est Freightliner dealer or Cummins engine dealer,
to obtain the special items required.
CAUTION
"Antileak" antifreezes are not recommended for use
in Cummins engines. Although these antifreezes are
chemically compatible with DCA water treatment,
the "antileak" agents may clog the coolant filters.
IMPORTANT: Fuel heaters used on vehicles with
Cummins engine systems could cause high fuel
temperatures that affect engine performance and
operation of the electronic engine controls. If a fuel
heater is used, make sure it has thermostatic con-
trols. If the fuel heater has a timer, set the timer to
activate only for a limited period of time before the
engine starts. Make sure the fuel heater is used
only for starting the engine.

Engine Break-In

Cummins Engines
Cummins engines are run on a dynamometer before
being shipped from the factory. In most applications, the
engine can be put to work immediately, but, during the
initial 100 hours or 3000 miles (4000 km) of service the
Engines
4.4