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306 Working mode
Power take-off
Power take-off function
& WARNING Risk of accident due to unin‐
tentional roll-starting of the vehicle
If you use the engine run-on function, the
vehicle can roll-start unintentionally when
crawler mode is switched on and the pulling-
away gear is engaged.
When the engine run-on function is used:
Shift the transmission to neutral posi‐
#
tion.
Apply the parking brake.
#
& WARNING Risk of fire due to flammable
materials on hot parts of the exhaust sys‐
tem
Flammable material such as leaves, grass or
twigs may ignite if they come into contact
with hot parts of the exhaust system.
When driving on unpaved roads or off-
#
road, regularly check the vehicle under‐
side.
Remove trapped plants or other flam‐
#
mable material, in particular.
If there is damage, consult a qualified
#
specialist workshop immediately.
& WARNING Risk of accident on uphill and
downhill gradients
On uphill and downhill gradients, the parking
brake might not be sufficient to secure the
vehicle.
A vehicle with trailer/semitrailer or a loaded
vehicle can roll away.
In the check position, check whether
#
the parking brake alone is sufficient to
hold the complete vehicle.
Always secure the towing vehicle and
#
trailer/semitrailer with the parking
brake and additionally with wheel
chocks.
* Note Vehicles with clutch pedal: damage
to the power take-off
Engaging or disengaging the power take-off
too soon after depressing the clutch pedal
can cause damage to the power take-off.
Wait ten seconds after depressing the
#
clutch pedal. Only then engage or disen‐
gage the power take-off.
When you engage a power take-off, the vehicle is
completely lowered on all air-sprung axles. This
increases the tipping stability of the vehicle.
With the power take-off, you can drive auxiliary
assemblies, e.g. hydraulic pumps. Depending on
the conditions of use, you must operate the
engine and power take-off at a certain engine
speed (working speed).
Power take-offs with rpm limitation: when the
power take-off is engaged, you cannot exceed the
programmed working speed.
The display of the on-board computer shows the
engagement status of the 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 assembly is directly connected to
the engine and is permanently driven. The work‐
ing speed and body-dependent functions are con‐
trolled and selected (
page 308) by switching
/
on the constant-rpm control F.
Vehicles with a transmission power take-off:
when the power take-off is engaged, you can
select all start-off gears or reverse gear when sta‐
tionary. Changes of direction are permitted only
in the selected gear. You must not change gears
while driving. On vehicles with an automated
manual transmission, the transmission automati‐
cally changes to the manual drive program
when the power take-off is engaged.
(
page 216)
/
Vehicles with an engine-driven power take-
off (NMV), without clutch actuator (N4Y or
N4Z): pulling away is not possible with the power
take-off engaged. You cannot operate the power
take-off while driving.
Vehicles with an engine-driven power take-
off (NMV), with clutch actuator (N4X or
N4W): when the power take-off is engaged, you
can select all start-off gears or reverse gear when
stationary. You can select all gears while driving.
Vehicles with manual or automated manual trans‐
mission: when the transmission power take-off is
engaged, you can select all start-off gears or
reverse gear when stationary. Changes of direc‐
tion are permitted only in the selected gear. You
must not change gears while driving.
M
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