2003-10:1 © Scania Industrial & Marine Engines 23
DRIVING
Check instruments and warning lamps at regular intervals.
Rotation speed
The Scania tachometer is divided into sectors of different colours, as follows:
Coolant temperature
Normal coolant temperature when the engine is running should be 70 - 90°C.
DEC2: If the temperature is high, 98°C or higher, it is possible to instruct the
control system to reduce the engine power (Power -) in order to lower the
temperature. See the DEC section on page 17.
If the temperature continues to rise, the engine will be stopped automatically
(Shutdown) at 103°C. See the DEC section on page 17.
Excessively high coolant temperature can damage the engine.
If run for extended periods under an extremely light load, the engine may
have difficulty in maintaining normal operating temperature. However, the
temperature will rise to a normal level again when the load on the engine is
increased.
0 - 500 rpm red area: prohibited engine speed,
passed when stopping and
starting.
500 - 700 rpm yellow area: slow idle.
700 - 2200 rpm green area: normal operating speed.
The engine's operating
speed range is controlled by
the DEC2 control system.
2200 - 2600 rpm yellow/green
striped:
unsuitable operating speed.
May occur when switching
off and during downhill
engine braking
2600 - 3000 rpm red area: prohibited engine speed
WARNING! When driving the vehicle on a steep downhill
slope, or in other installations where the engine can be
driven by the vehicle movement, DEC2 will set zero
fuel supply to protect against overrevving and will
switch off the engine. It must not be disengaged in this
position since this can cause important functions such
as the steering and brake system to fail when the
engine stops rotating.
!
Cooling systems with Scania
radiators and plastic expansion
tanks must not have excess
pressure in the system, i.e.
pressure caps must not be used
on expansion tanks.
To Next Page
Loading...
