RUNNING GEAR OPERATION
Operating instructions • Load Carrier • 505410638-02 • 07/2019
43
If there is sufficient air and power supply,
the system can automatically regulate the
ramp height. If there is no power supply,
the ramp can also be adjusted via the elec-
tronically controlled air suspension with the
control lever on the control unit.
Also observe the enclosed supplier
documentation.
5.11 Lift axles
WARNING
Risk of accidents due to the raising
and lowering of the lift axle!
The lift axles are automatically raised de-
pending on the load state. If the tractor
unit's ignition is turned off, the raised lift
axles are lowered. There is an increased
risk of injury in the danger area of the
wheels.
► Instruct persons to leave the hazard
area of the wheels during loading and
unloading.
KRONE trailers in the turnframe version (3-
axle) and the central axle trailer can be
equipped with a fully automatically con-
trolled electronic lift axle control.
Fully automatic lifting of lift axles depend-
ing on the vehicle’s axle weight (air bellows
pressure) only takes place if the EBS plug
connection (ISO7638) is active and the
vehicle speed is greater than 15km/h for
the first time. When the ignition is interrup-
ted while the vehicle is at standstill, the lift
axle is lowered independent of the
vehicle's axle weight.
Manually overriding the fully-automatic
electronic lift axle control
Automatic control is cancelled if the lift axle
control is manually operated on the control
switch. The dependencies on the vehicle
axle weight and the vehicle speed are not
taken into account in this event. An EBS
plug connection is a precondition for this.
The control switch for manual lift axle con-
trol is on the control unit. Controlling a fur-
ther lift axle is done on the same control
switch on the fully-automatic and electronic
lift axle control systems. The design and
arrangement of the control switch depends
on the vehicle equipment.
Using the lift axle's control switch, the
driver can interrupt the automation of the
lift axle control to activate the following
functions:
○ Starting aid: Manually raise the lift
axle
A lift axle can be raised by force at a
maximum vehicle speed of 30km/h
and up to 30% overload for the axle re-
maining on the ground.
○ Manoeuvring aid: Manually raise the
lift axle
A lift axle can be raised by force at a
maximum vehicle speed of 30km/h
and up to 0% overload for the axle re-
maining on the ground.
○ Deactivating the lift axle automatic
system: Manually lower the lift axles
The starting aid function refers to a lift axle
in the first position of the rear axle group
on 3-axle trailers. The automatic lift axle
control is re-activated by turning the igni-
tion off and on in the tractor unit.
Fig.5-29: Control unit for Load Carrier turn-
frame version (3-axle)
1 Lift axle control switch
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