OPM 250 en-GB 21
© Scania CV AB 2022, Sweden
Starting and running
Checks before running
Carry out daily maintenance as described in the
maintenance schedule prior to operation. See
Maintenance interval
.
Starting the engine
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.
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:
Switch on the power by means of the battery
master switch.
4. Start the engine.
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 Venting the fuel system
.
Starting at low temperatures
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).
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.
Running
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
1,050 rpm.
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