Liebherr LTM 1400-7.1 - Manual (Page 3)

PN 1400-7.1 DEFISR.fh11 24.07.2007 10:48 Uhr Seite 3
Probedruck
C M Y CM MY CY CMY K
3 10 LTM 1400-7.1 LTM 1400-7.1
P1
P2
P3
P5
P4
Axles 4 – 7 provided for "active rear-axle steering”, 5 steering
methods are preselectable by fixed programs (P)
P1 Road displacement steering
Axles 1 – 3 are steered mechanically by means of the steering
wheel with hydraulic assistance. Axles 4 and 5 are steered
“actively”, speed-dependent up to 30 km/h in relation to the
degree of lock of the front axle, and set and blocked to straight
displacement at over 30 km/h. Axles 6 and 7 are steered
“actively”, speed-dependent up to 60 km/h, in relation to the
degree of lock of the front axles, and set electrohydraulically
to straight displacement up to 60 km/h. The modification of
the steering angle in dependance of the speed guarantees a
precise and stable displacement quality and reduces the
abrasion of the pneumatics.
P2 All-wheel steering
Axles 4 – 7 are locked in conformance with the steering angle
of the 1st axle by means of the steering wheel to realize the
smallest turning radii.
P3 Crab steering
Axles 4 – 7 are locked in the identical sense of axles 1 – 3 by
means of the steering wheel. The raising of the axles is not
necessary for crab steering as all axles are steered.
P4 Steering without swerving out
Axles 4 – 7 are locked in relation to the steering angle of the
1st axle to prevent any swerving out of the rear of the carrier.
P5 Manual crab steering
Axles 1 – 3 are steered by means of the steering wheel, axles
4 – 7 are steered independently from the steering lock of axles
1 – 3 by pushbuttons.
• In case of a failure of the active rear-axle steering, it is rendered
ineffective and the rear axles are set to straight travel by the
centering rams
• Two independent hydraulic circuits with wheel and engine
driven hydraulic pump, thus maximum safety standard
• Two independent steering processors
(by existing E/A modules) and divergent sensory system
• The entire know-how for the "active rear-axle steering"
by Liebherr
Variable steering concept with "active
rear-axle steering"
• The electric and electronic components are interconnected
by the most modern data bus transmission technology
• Digital data transmission to the individual functional blocks
by just a few data cables instead of the conventional electric
wiring; thus increased functional reliability due to essentially
less contacts
• Self-manufactured Liebherr bus systems (LSB), specially
matched for the requirements of a mobile crane
• Diesel engine and automatic transmission are controlled by
means of a CAN data bus. The all-electronic drive
management reduces fuel consumption and improves the
exhaust gas emission
• The electric systems of the carrier and the crane as well as
all cockpit functions, the outrigger system and the boom
sensory system are interconnected by 4 Liebherr-system
busses
• The control of the functional blocks is realized by E/A modules,
the programming of which is performed by means of the
Liebherr system busses. The control intelligence is integrated
into the LICCON central unit
• Comprehensive diagnostic facilities, quick error localization,
operating error indication
• Test programs for functional test of the keyboard and display
unit as well as for the test of the control units of engine and
transmission management, Liebherr additional brake system,
hydraulic ventilator, hydraulic suspension and outrigger control
units
• The new data bus technology distinctively increases the
fuinctionality and efficiency of the mobile crane
Data bus technology for more
functionality and efficiency
LSB 1
CAN-Bus
3a 8
18
5
1
2 2a
1a
16
22
LSB 1
17
15
7 6
LSB 5
LSB 3
LSB 4
CAN-Bus
23
3