Mobile Crane
Product advantages
Max. lifting capacity: 250 t
Max. height under hook: 108 m
Max. radius: 92 m
LTM 1250-6.1
Compact, manoeuvrable
and weight-optimized
• Overall length 17.4 m, carrier 15.3 m long
• Large overhang angles, front up to 17°, rear up to 19°
• Smallest turning radius by 5-axle steering
(13.1 m over carrier)
• Axle load equalization (12 t) due to hydropneumatic
suspension ”Niveaumatik”
• In addition to service and parking brake, the following
sustained-action brakes are part of the standard equipment
for safe travel: retarder in the automatic transmission and
engine brake as exhaust brake with Liebherr auxiliary brake
system by valve control (ZBS)
Variable drive and steering concept
• Standard 5-axle steering, 5th and 6th axle are also steerable
independant from axles 1 – 3. During crab steering/diagonal
displacement, axles 3 and 4 are raised hydraulically
• Drive 12 x 6, axles 1, 5 and 6 are driven
• Drive 12 x 8, axles 1, 4, 5 and 6 are driven, 4th axle activatable
for off-road travel
• Automated gear system ZF-TC-TRONIC with converter and
retarder; 12 forward and 2 reversed speeds, automated
control
• Reduced fuel consumption due to a great number of speeds,
sensitive maneuvering due to converter
• Robust transfer case with transfer differential
• Driving axles with differential locks for transverse locking in
off-road ratio
Setting crane on outriggers –
quick, convenient and safe
• Supporting basis 8.84 m x 8.5 m or 8.84 m x 5.58 m
• Fixed lightweight supporting pads (plastic) with lateral
compensation
• Supporting rams with 600 mm travel
• Level control of supporting system, all-automatic levelling
of the crane during the supporting procedure by “pushbutton control”
• 2 x 9° lateral inclination even with locked suspension
• Inclinometer (electronic inclination indicator) with two displays
on the carrier and one display on the LICCON monitor in
the crane cab
• 2 supporting force indicators on the control panels on the
carrier and on the LICCON monitor
• Operation of the outrigger system in accordance with the
rules for the prevention of accidents
15,29
17.41
2.13
4.0
19°
17°
16.00 R 25 12 t 12 t 12 t 12 t 12 t 12 t
600
8.5
5.58
3.0
6.56
8.86
R=11.40
0.6
R = 6.42
R=13.05
R=14.14
LTM 1250-6.1 LTM 1250-6.1
• 72 m long, 6-section telescopic boom
• Features of the new boom technology:
- optimimized, oviform boom profile – patented internal
interlocking system of the telescopes
- automatic telescopic system “Telematic”
• Telescopic boom with electronically controlled
telescoping system
• Boom bearings of low maintenance polyamide slide blocks
• Outstanding lifting capacities, e.g.
84 t at 10 m radius
38 t at 20 m radius
15.4 t at 40 m radius
8.4 t at 60 m radius
2.1 t at 80 m radius
1.1 t at 92 m radius
• 8-cylinder Liebherr turbo-charged Diesel engine type
D9508 A7, 450 kW/612 h.p., exhaust emissions acc. to
97/68/EG stage 3 and EPA/CARB Tier 3, energy-saving,
robust and reliable, electronic engine management
• Automated gear system ZF-TC-TRONIC with converter and
retarder; 12 forward and 2 reversed speeds, automated
control
• Robust transfer case with transfer differential
• Robust crane axles, welded design
• Max. driving speed 76 km/h, max. gradability 43 %
• Steel-fabricated, corrosion resistant cab, cataphoretic dipprimed, front section on rubber shock absorbers, rear section
on hydraulic dampers, internal sound and heat absorbing
panelling, modern interior design of outstanding functionality
• Safety glass all-round, green-tinted heat-isolating front and
side window panes, electric window lifters
• Standardised digital operating and control elements arranged
in an operator-friendly halfround shape
• Additional heater with engine preheating
• Weight-optimized and low maintenance axles of high-tensile
steel, perfect track-keeping and lateral stability due to special
control linkage arrangement
• The low maintenance steering nuckles are steel and rubber
mounted, thus bearing failures are practically ruled out
• The perfected and robust axles are manufactured in large
series and are part of the trouble-free components of a
mobile crane
• The cardan shafts are maintenance-free. The 70° diagonal
toothing and 4 fixing bolts enable easy and fast fitting of the
cardan shafts
Ultramodern boom technology Powerful carrier drive
Modern and comfortable
driver’s cab
Outstanding carrier technology
for road and off-road operation
• Steel-fabricated and corrosion-resistant crane cab, powdercoated, with internal sound and heat absorbing panelling,
modern interior design, tinted panes all-round, front knockout
window with large windscreen wiper and washer, skylight
of bullet-proof glass with large windscreen wiper and washer,
roller blinds on front window and skylight, space saving
sliding door
• Additional heater
with engine preheating
• Pneumatic operated footboard for safe access to the carrier
• Crane cab tiltable by 20° to the rear
• Crane engine: 4-cylinder Liebherr turbo-charged Diesel
engine type D934L A6 of 180 KW/245 h.p., robust and
reliable,exhaust emissions acc. to 97/68/EG stage 3 and
EPA/CARB Tier 3, electronic engine management, optimized
fuel consumption, exhaust gas system of stainless steel,
very efficient noise abatment of the dieselhydraulic crane
drive
• Slewing rim, slewing gear and the winches are selfmanufactured components specially matched for the
application on mobile cranes
• The centralized lubricating system for slewing rim, boom
bearing application, luffing rams and winch bearings is a
standard feature
Crane cab of modern design Crane drive with
field-proven components
• Maintenance-free suspension rams, free from lateral forces
and protected against damage by synthetic tubes
• Level adjustment (suspension set to “travel mode”) can be
performed automatically from any position by push-button
control
• Stable cornering ability of the crane due to cross mounting
of the hydropneumatic suspension
• Axle locking system (blocking of the suspension for travelling
with equipment) integrated into the suspension rams and
controllable from the driver’s cab
• Carrier, superstructure and telescopic boom in light-gauge
design, calculated by the F.E.M. method, thus weightoptimized and particularly torsonally rigid
• Tensile property of the material with high safety factors
through the application of STE 960 (960 N/mm
2
) for all
supporting members. Telescopic boom bottom shell of ultrahigh tensile steel S 1100 QL (1100 N/mm
2
)
• Weldment joints of oustanding quality are performed by
computer-aided welding machines
• The weld quality is documented by ultrasonic test
Crane- and road-preserving
Niveaumatik suspension
Weight-optimized steel structure
3 412
• Modern and comfortable driver’s cab of outstanding
functionality and convincing design
• Ergonomically arranged operating and display units for safe
and convenient handling at permanent operation
• Digital display and keyboard units interconnected with the
function blocks by data bus technique
• Air-cushioned driver’s and co-driver’s seat with head rests,
driver’s seat with lumber support
• Auxiliary heater with engine preheating
• Safety belts for driver and co-driver
• Height and inclination adjustable steering wheel
• Heated and electrically adjustable rear mirrors
• Side panes with electric window lifters
• 3 automatic windscreen wipers with washing device and
intermittent control
• Delayed disconnection or interior lighting
• Various racks and boxes
• Radio preparation
Comfortable driver’s cab of
outstanding functionality
• Spring-mounted and hydraulically cushioned crane operator’s
seat with pneumatic lumber support and headrest
• Operator-friendly armrest-integrated controls, vertically and
horizontally adjustable master switch consoles and
ergonomically adjustable operating consoles
• Ergonomic control levers with integrated winch rotation and
slewing indicator
• Modern instrument supporting base with integrated LICCON
monitor, display of all essential operating data on the
LICCON screen
• Green-tinted heat-isolating front and side window panes
• Wiper/washer device for front window and skylight
• Auxiliary heater with engine preheating
• Various racks and boxes
• Radio preparation
• 1 working projector 70 Watt on the cabin front
Comfortable crane cab of
outstanding functionality
LTM 1250-6.1 LTM 1250-6.1 LTM 1250-6.1
• Modern and comfortable driver’s cab of outstanding
functionality and convincing design
• Ergonomically arranged operating and display units for safe
and convenient handling at permanent operation
• Digital display and keyboard units interconnected with the
function blocks by data bus technique
• Air-cushioned driver’s and co-driver’s seat with head rests,
driver’s seat with lumber support
• Auxiliary heater with engine preheating
• Safety belts for driver and co-driver
• Height and inclination adjustable steering wheel
• Heated and electrically adjustable rear mirrors
• Side panes with electric window lifters
• 3 automatic windscreen wipers with washing device and
intermittent control
• Delayed disconnection or interior lighting
• Various racks and boxes
• Radio preparation
Comfortable driver’s cab of
outstanding functionality
• Spring-mounted and hydraulically cushioned crane operator’s
seat with pneumatic lumber support and headrest
• Operator-friendly armrest-integrated controls, vertically and
horizontally adjustable master switch consoles and
ergonomically adjustable operating consoles
• Ergonomic control levers with integrated winch rotation and
slewing indicator
• Modern instrument supporting base with integrated LICCON
monitor, display of all essential operating data on the
LICCON screen
• Green-tinted heat-isolating front and side window panes
• Wiper/washer device for front window and skylight
• Auxiliary heater with engine preheating
• Various racks and boxes
• Radio preparation
• 1 working projector 70 Watt on the cabin front
Comfortable crane cab of
outstanding functionality
• The electric and electronic components are interconnected
by the latest data bus transmission technique
• Instead of the traditional electric wiring, the data transmission
to the individual function blocks is performed digitally just
by a few data cables, thus improved reliability due to
essentially less contacts
• Self-manufactured Liebherr bus systems (LSB), specially
adapted to the requirements of a mobile crane
• Diesel engine and automatic transmission are controlled by
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 crane as well as of
all cockpit functions, the outrigger system and sensor system
of the boom are interconnected by 4 Liebherr system busses
• The control of the function blocks is realized by I/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 display
• Test programs for functional test of keyboard and display
unit as well as for the test of the control units for engine and
transmission management, additional Liebherr brake system,
hydraulic ventilator, hydraulic suspension and outrigger
control panels
• The new data bus technique distinctively increases
functionality and efficiency of the mobile crane
2a
1a
• The electric and electronic components are interconnected
by the latest data bus transmission technique
• Instead of the traditional electric wiring, the data transmission
to the individual function blocks is performed digitally just
by a few data cables, thus improved reliability due to
essentially less contacts
• Self-manufactured Liebherr bus systems (LSB), specially
adapted to the requirements of a mobile crane
• Diesel engine and automatic transmission are controlled by
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 crane as well as of
all cockpit functions, the outrigger system and sensor system
of the boom are interconnected by 4 Liebherr system busses
• The control of the function blocks is realized by I/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 display
• Test programs for functional test of keyboard and display
unit as well as for the test of the control units for engine and
transmission management, additional Liebherr brake system,
hydraulic ventilator, hydraulic suspension and outrigger
control panels
• The new data bus technique distinctively increases
functionality and efficiency of the mobile crane
16
17
LSB 1
LSB 3
18
LSB 4
Legend:
LSB - Liebherr system bus 1
LSB - Liebherr system bus 2
LSB - Liebherr system bus 3
LSB - Liebherr system bus 4
CAN - Bus
SCI - serial communication interface
1 Input/output module for control of the suspension, Liebherr
Diesel engine, automatic transmission, control functions,
pneumatic control of brake functions
1a Instruments keyboard unit in driver’s cab
2 Input/output module for differential locks, display functions
2a Instruments keyboard unit in driver’s cab
3 Input/output module for outrigger system - right
3a Control unit for outrigger system - right
4 Input/output module for outrigger system - left
4a Control unit for outriggers system - left
5 Input/output module for engine brake, cruise controller, speed
setter, control of Diesel engine (steering column switch right)
and automatic transmission
6 Control of automatic transmission
7 Control of injection pump – Liebherr Diesel engine/carrier
8 Slewing sensor in slipring unit
9 Connection of Liebherr system bus (LSB 1, 2, 3, 4)
10 LICCON central unit
11 LICCON monitor in crane cab
12 Length sensor and cable drum/energy cable for interlocking
gripper/telescopic boom
13 Inductive sensors (12 x)
14 Angle sensor on base section
15 Cable drum for items 16, 17, 18 and for luffing jib
16 Wind sensor
17 Hoist limit switch
18 Angle sensor
19 Input/output module for electronic control of Diesel
engine/superstructure, air flap, ventilator clutch, exhaust
flap
20 Control injection pump – Liebherr Diesel
engine/superstructure
21 Control lever
22 Pressure sensor (4 x) for output management and LMB
(safe load indicator)
1a
14
15
CAN-Bus
6
5
1
7
CAN-Bus
3a
22
13
12
3
8
20
11
19
9
10
LSB 2
2121
2a
2
LSB 1
LTM 1250-6.1 LTM 1250-6.1
4
4a
76
• 6-section, 72 m long telescopic boom for 72 m height under
hook and 66 m radius
• Optimized, oviform boom profile with continuous curvature
of the bottom shell and offset joint, high deformation stability
for maximum loads
• Broad boom profile for strengthening of the lateral bending
axis and stabilization of long additional booms
• Patented internal locking system of the telescopes – reliable
and maintenance-free
• High functionality of the boom system due to the automated
telescoping system ”Telematik”
• Optimal utilization of the telescopic boom due to a multitude
of telescoping variants
Load handling – precise and safe
oviform boom profile
70 m
15.5 m
20.7 m
25.9 m
31.1 m
36.3 m
41.5 m
46.7 m
51.9 m
57.1 m
62.3 m
72 m
67.5 m
60 m
50 m
40 m
30 m
20 m
10 m
80 m
LTM 1250-6.1 LTM 1250-6.1
• Telescopic boom T, 15.5 m – 72 m
• Swing-away jib K, 12.2 m long, biparted swing-away jib K,
12.2 m – 22 m long, extendable up to 36 m, mountable at
0°, 20° or 40°
• Special swing-away jib, 3.4 m long
• Fixed lattice jib TF, 14 m – 42 m, mountable at 0°, 20° or 40°
to the 51.9 m – 72 m long telescopic boom
• Luffing lattice jib TN, 17.5 m – 70 m, mountable on the
15.4 m – 67.5 m long telescopic boom with continuous
inclination between 82° and 68°
• Intermediate sections TF and TN equipment identical and
can be slid into one another for transportation
Multi-variable boom configuration system
• Jib A-frames with T-adapter and N-base section form a
complete transport unit and can be mounted with just 4 pins
• Easy-to-rig stay rods which remain on the intermediate
sections during transportation
• Auxiliary winch on the superstructure for easy reeving of the
hoist and luffing ropes
• Rigging of the lattice jib is practicable in suspended condition
on restricted sites
• Winch 2 for luffing operation of the jib
• Continuous load capacity interpolation during luffing of the
boom combinations TN between 82° and 68° inclination of
the telescopic boom
68°
82°
100 m
90 m
80 m
70 m
60 m
50 m
40 m
30 m
20 m
10 m
110 m
120 m
T TK TF TN
98
• Standard application programs: Safe load indicator (LMB),
configuration program with configuration image, telescoping
program with telescoping image, supporting force display,
control parameter program, test system; and as an option,
the work area limitation and the LICCON work planner
• Setting of the crane configuration by convenient
interactive functions
• Safe and reliable acknowledement of the crane
configuration set
• Representation of all essential data by graphic symbols on
the operating image
• With integrated wind speed control
• Reliable cut-off device in the event of exceeding the
admissible load moments
• Safe working load values for any intermediate boom length
• Winch indications for ultra-precise lifting/lowering of the load
LICCON computer system for control
and monitoring functions
• Telescoping by single-stage hydraulic ram with hydraulic
driving tenons (patented internal interlocking system)
• Telescoping procedure controllable by convenient operator’s
guide on the monitor, precise approach of the interlocking
positions
• Telescopable loads are displayed on the
LICCON operating image
• Rapid-cycle telescoping system with “automatic mode”, i.e.
all automatic telescoping of the boom to the desired length
• Particularly compact and light-weight telescopic system,
thus increased lifting capacities specially with long booms
at large radii
• Automatic cushioning in end positions during telescoping
and retracting for the preservation of the structural members
LICCON-assisted telescoping system
LTM 1250-6.1 LTM 1250-6.1
• The test system assists the servicing personnel in quickly
localizing errors of the sensor system without needing any
further measuring instruments
• Convenient interactive functions permit the observation of
all in- and outputs of the general system by different displays
on the monitor even during crane operation. It equally
visualizes the allocation of the individual sensors to the
system as well as their function and the terminals concerned
in the control cabinet
• The table of contents enables the display of the contents
and the state of development of the program modules as
well as the load charts on the monitor
• The service starts on the monitor, error detection becomes
a matter of seconds
The LICCON test system
• It relieves the crane operator, especially in situations where
the handling of loads requires his full attention, by controlling
the work area limits. Work areas can be restricted by buildings,
bridges, roofs, high-tension lines, pipe lines or adjacent
cranes. The automatic work area limitation system (optional)
can easily be programmed. Four different limitation functions
are practicable:
• Height limitation of the pulley head
• Radius limitation
• Slewing angle limitation
• Limitation of edges
The LICCON work area
limitation system
• The LICCON work planner consists of a software program
for planning, simulation and documentation of crane
applications on the monitor
• The 2-D planner allows to draw buildings, to write texts and
to represent a crane model true to scale including its motions
within a fictional construction site
• The work planner enables the preparation of more transparent
offers, facilitates the briefing of the crane operators and it
can be run on a laptop at the construction site
The LICCON work planner
Mounting of counterweight –
just a matter of minutes
• Counterweight variants 0 t, 10 t, 22.5 t, 35 t, 47.5 t,
60 t, 72.5 t, 85 t and 97.5 t
• Ballasting controlled from the crane cab
• Quick ballasting due to the keyhole system
• Ballast rams fix-mounted to the superstructure
• Compact counterweight dimensions, e.g. 47.5 t counterweight
of 3 m width only
6.56
2.45
R = 5.6
12.5 t
12.5 t
12.5 t
12.5 t
47.5 t
12.5 t
12.5 t
12.5 t
10 t
47.5 t
LTM 1250-6.1 LTM 1250-6.1 LTM 1250-6.1
Electric/electronic crane control with integrated safe load indicator
• Control of winches, slewing gear as well as luffing and
telescoping motions by the LICCON system (PLC control)
• Four working motions can be performed independent from
one another
• Speeds of hoisting/lowering, slewing and luffing are preselectable in 5 steps
• Luffing speed controlled automatically dependent on the
boom length
• Extremely short response times when initiating crane motions
• Hoist gear and slewing gear are operating in a “closed oil
circuit”. This ensures high-precision lifting, lowering and
slewing of loads. Moreover, the potential energy generated
during lowering is not transformed into heat but can be
reemployed for a 2nd motion which results in the particular
advantage of fuel saving and reduced thermal exposure of
the oil than in an open circuit
• Functional test of all essential components by the LICCON
test system
On the carrier
• Eddy-current-brake
• Stow-away box for sling gear and stand timber
• Air-conditioning system
• Trailer coupling D12/D19
• Radio preparation
• Seat heating for driver’s and co-driver’s seat
• Fog lamps
• CD radio set
On crane superstructure/telescopic boom
• 2nd hoist gear
• Air-conditioning system
• Seat heating
• Work area limitation
• Work projector 1 x 70 W on cabin roof
• Two work projectors (Xenon) – electrically adjustable – on
boom base section
• whip line
• Erection jib
• GSM module for remote diagnostics
• Radio preparation
• CD radio set
• Crane data logger
Further optional features by request.
Optional features extend the application spectrum
and increase comfort and safety
control block
LICCON
display
screen
luffing ram
single-action
telescoping
ram with
hydraulic
interlocking
device
control levers
3 variable
displacement
pumps
Liebherr Diesel engine D934L A6
transmitters
Liebherr
slewing gear
1 variable
displacement
pump
sensors
Liebherr
hoist winch I
Liebherr
hoist winch II
engine
control
Liebherr
slewing gear
LICCON-
control
132
The pictures contain also accessories and special equipment which are not included in the standard scope of delivery. Subject to modification.PN 131.01.E05.2010
Liebherr-Werk Ehingen GmbH
Postfach 1361, 89582 Ehingen, Germany
� +49 7391 5 02- 0, Fax +49 73 91 5 02-33 99
www.liebherr.com, E-Mail: info.lwe@liebherr.com
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