Useful information
These Operating Instructions describe all the
models and standard and optional equipment of
your vehicle that were available at the time of
going to print. Country-specific differences are
possible. Bear in mind that your vehicle may not
be equipped with all the functions described.
This also applies to safety-relevant systems and
functions.
Read the information on qualified specialist
workshops (Y page 31).
Power take-offs
Function and notes
G
WARNING
When using the engine run-on function, the
vehicle may start to roll if crawler mode is
activated and the pulling-away gear is
engaged. There is a risk of an accident.
When using the engine run-on function:
R
shift the transmission into neutral.
R
apply the parking brake.
!
Vehicles with a clutch pedal:
After declutching, you must wait for 10 sec-
onds before engaging or disengaging the
power take-off. In this way you will avoid con-
sequential damage.
You can use power take-off to drive auxiliary
equipment, e.g. hydraulic pumps. The engine
and power take-off must be operated at a cer-
tain engine speed (working speed), depending
on the conditions of use.
The working speed can be changed:
R
via the on-board computer in the driving sys-
tems menu, Engine speed window
(Y page 345)
R
using the F constant engine speed switch
(Y page 345)
Power take-offs with speed limiter: when power
take-off is engaged, the set working speed can-
not be exceeded.
The display of the on-board computer shows the
activation state of power take-off:
/
Power take-off disengaged
0
Power take-off engaged
Vehicles with a power take-off on the
engine: power take-off on the engine is not
selectable. The auxiliary equipment is connec-
ted directly to the engine and is continuously in
operation. The working speed and body-depend-
ent functions are controlled and activated when
constant engine speed F (Y page 345) is
switched on.
Vehicles with transmission-driven power
take-off: if power take-off is engaged, you can
select any pulling-away gear or reverse gear
when stationary. Changes of direction are only
permissible in the selected gear. You may not
change gear while driving. On vehicles with an
automated manual transmission, the transmis-
sion changes automatically to manual drive pro-
gram M when power take-off is switched on.
Vehicles with transmission-independent
power take-off (NMV), without clutch actua-
tor (N4Y or N4Z): pulling away is not possible
when power take-off is engaged. You cannot
operate power take-off while the vehicle is in
motion.
Vehicles with transmission-independent
power take-off (NMV), without clutch actua-
tor (N4X or N4W): if power take-off is engaged,
you can select any pulling-away gear or reverse
gear when stationary. During the journey you
can select any gear.
If you have to leave the cab to operate power
take-off, you can use the ignition lock's engine
run-on function (Y page 239). The engine con-
tinues to run and the doors of the cab can be
locked with the key.
When power take-off is engaged, manual regen-
eration is interrupted. Manual regeneration can-
not be started if power take-off is active.
i
The engine speed may rise and the engine
noise may change while regeneration is in
process.
i
If you have to leave the cab to operate power
take-off, observe the important safety notes
on the diesel particle filter (Y page 311).
Power take-offs
341
Working mode
Z
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