Dde S - freightliner Columbia Driver Manual

temperatures below –10°F (–23°C), consult your
Caterpillar dealer for recommendations.
5.
When customer parameters include cold-mode
operation and the coolant temperature is below
82°F (28°C), the system puts the engine into
cold mode. It adjusts the low idle to 600 rpm for
the 3406E, C–15, and C–16 engines, and 800
rpm for the C–10 and C–12 engines. It also ad-
vances the timing, to reduce white smoke emis-
sions and improve warm-up time. The system will
keep the engine in cold mode until the coolant
temperature rises above 82°F (28°C). After cold
mode has been completed, operate the vehicle
at low load and low rpm until the engine coolant
reaches normal operating temperature of 189°F
(87°C).
6. Fuel cloud point is the temperature at which wax
crystals become visible, which is generally above
the pour point of the fuel. To keep the fuel filter
elements from plugging with wax crystals, the
cloud point should be no higher than the lowest
ambient temperature at which the engine must
start.
Cummins
The two most commonly used terms associated with
preparation of equipment for low-temperature opera-
tion are "winterization" and "arctic specifications."
Winterization of the engine and/or components, so
that starting and operating are possible in the lowest
temperature to be encountered, requires:
•
Proper lubrication with low-temperature lubri-
cating oils.
•
Protection from the low-temperature air. The
metal temperature does not change, but the
rate of heat dissipation is affected.
•
Fuel of the proper grade for the lowest tem-
perature.
•
Heat 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,
connections, and batteries in the electrical sys-
tem should be inspected and kept in good con-
dition to prevent losses through poor contacts.
Engines and Clutches
Arctic specifications refer to the design of material
and specifications of components necessary for sat-
isfactory engine operation in extremely low tempera-
tures to –65°F (–54°C). Contact the nearest Freight-
liner dealer or Cummins engine dealer, to obtain the
special items required.
CAUTION
"Antileak" antifreezes are not recommended for
use in Cummins engines. Although these anti-
freezes are chemically compatible with DCA
water treatment, the "antileak" agents may clog
the coolant filters.
IMPORTANT: Fuel heaters used on vehicles
with Cummins CELECT Plus engine systems
could cause high fuel temperatures that affect
engine performance and operation of the elec-
tronic engine controls. If a fuel heater is used,
make sure it has thermostatic controls. If the
fuel heater has a timer, set the timer to activate
only for a limited period of time before the en-
gine starts. Make sure the fuel heater is used
only for starting the engine.
For more information, see the Cummins Operation
and Maintenance Manual .

DDE S60

Preparations made in advance of winter and mainte-
nance performed during the cold months will help to
ensure efficient engine starting and operation.
•
Engine oil thickens as it gets colder, slowing
cranking speed. When cold, multi-grade oil of-
fers less resistance to the cranking effort of the
engine and permits sufficient rpm to be devel-
oped to start the engine. See "How to Select
Lubricating Oil" in the Detroit Diesel Engine
Operator's Guide for specific recommenda-
tions.
•
When an engine equipped with a DDEC sys-
tem is started at temperatures below 25°F
(–4°C), the idle speed automatically increases
to 900 rpm. The injection timing is also ad-
vanced to decrease white smoke. As the en-
gine oil warms up, the idle speed gradually de-
creases. When the oil temperature reaches
122°F (50°C), both the idle speed and the in-
jection timing return to normal.
7.14