Mercedes-Benz OM 904-926 LA BlueTec, Руководство по эксплуатации

Страница: 41 / 112

tem, the torque is reduced automatically after
36 operating hours of the engine.
Operating restrictions for off-highway
engines
Minor operating restriction
The available torque is reduced within a
period of 10 minutes. The torque is reduced
across the entire engine speed range to 80%
of the maximum torque (see the diagram
below).
Reduction in output during minor operating restric-
tion
Major operating restriction
The transition between a minor and a major
operating restriction is achieved by a gradual
reduction in engine speed and torque. The
reduction takes place over a period of 60
minutes.
R
The engine torque is reduced from 80% of
the rated value by 1% per minute to 20% of
the rated value.
R
Simultaneously, the engine speed is
reduced over the period of 60 minutes from
the initial value to 1000 rpm.
Emergency override
A button is optionally available for overriding
the operating restriction in an emergency.
The override function makes the full engine
output available for up to 30 minutes and can
be used a maximum of three times. The over-
ride can only be activated between the start
of the operating restriction system and the
end of the major operating restriction. The
override function is also used to reset the
operating restriction after the fault is correc-
ted. This is the case, for example, after filling
up with AdBlue
®
/DEF of the correct quality.
Deleting the fault memory
A fault stored in the fault memory because of
the operating restriction system cannot be
deleted with a conventional reading device.
Faults can only be deleted using the Daimler/
MTU maintenance system.
Repeated violations
In the event of repeated violations, the peri-
ods for the trigger signals and continuous
reduction are shortened. When a fault is elim-
inated (for example the NOx sensor is
replaced or reconnected), the operating
restrictions are reset. Normal operation can
be resumed. If a fault occurs again because
of the operating restriction system within
40 hours, the periods of the operating restric-
tion system are shortened.
Example: if a fault reoccurs within 40 hours
of the first elimination, the time until the oper-
ating restriction comes into effect is halved.
If the same fault occurs within 40 hours of the
second fault being rectified, the times are
shortened to a quarter.
Stopping and switching off the engine
G
WARNING
When switching off the equipment or parking
the vehicle, make sure that the exhaust sys-
tem does not come into contact with com-
bustible objects, e.g. dry leaves, grass or
other highly flammable materials.
X
Park the vehicle/equipment.
X
Secure the vehicle/equipment against roll-
ing away.
X
Shift the transmission into neutral/decou-
ple the drive system.
Operation
39
Driving mode/working mode
Z