Scania DC09 - Engine Start, Altitude, and Speed Management

OPM 100 en-GB 31
© Scania CV AB 2023, Sweden
Starting and driving
Starting the engine
WARNING!
Never use starter gas or similar agents to help
start the engine. This can cause an explosion in
the intake manifold and possible injury.
Only start the engine in a well ventilated area.
When the engine is run in an enclosed space,
there must be effective devices to extract exhaust
gases and crankcase gases.
IMPORTANT!
The starter motor must only be cranked twice for
30 seconds at a time. After that, it must rest for at
least 5 minutes before the next attempt to start it.
For environmental reasons the Scania engine has
been developed to be started with a low fuel feed.
Using unnecessarily large amounts of fuel when
starting the engine always results in emissions of
unburnt fuel.
1. Open any fuel cock.
2. Disengage the engine.
3. If the engine has a battery master switch:
Connect the power using the battery master
switch.
4. Start the motor.
If the fuel tank has been run dry or if the engine
has not been used for a long time, bleed the fuel
system. See the section Bleeding the fuel system
.
Starting at low temperatures and at
high altitudes
Take the local environmental requirements into
account. Use a fuel heater and engine heater to
avoid starting problems and white smoke.
Scania recommends that an engine heater should
be used if the engine will be used at temperatures
below -10°C (14°F) or at an altitude of more than
2,000 metres.
A low engine speed and a moderate load on a
cold engine limits white smoke, gives better
combustion and warms up the engine more
quickly than warming it up with no load.
Avoid running it longer than necessary at idling
speed.
Driving
Check instruments and warning lamps at regular
intervals.
Engine speed range
The engine operating speed range is between low
idling and the nominal engine speed. The nomi-
nal engine speed is indicated on the engine data
plate. Low idling can be set between 500 and 975
rpm.
A slightly higher engine speed than the nominal
engine speed may occur at low or negative load.
Driving at high altitude
When driving at high altitudes engine power is
reduced automatically due to the lower oxygen
content in the air. It is then not possible to run the
engine at maximum power.
Note:
Driving at an altitude higher than 4,000 metres
above sea level is only permitted if it has first
been approved by Scania.
Note:
During high dynamic operation, of excavators
for example, the EGR cooler may need cleaning.
Cleaning must be carried out as described in the
Workshop Manual.
Change of rotational speed for sin-
gle-speed engines
When changing the rotational speed of a single-
speed engine, the engine must be stopped com-
pletely before the rotational speed is changed.
IMPORTANT!
The engine must not be driven at other rotational
speeds than those approved by Scania.