Liebherr LTM 1220-5.2 User Manual
Mobile crane
Product advantages
Max. load capacity: 220 t
Max. height under hook: 101 m
Max. radius: 88 m
LTM 1220-5.2
15323
Compact, maneuverable and
weight-optimized
40000
20°
16.00 R 25 12 t 12 t 12 t 12 t 12 t
2219
R = 12070
R
R
= 11010
= 9560
13298
15517
8899
5104
= 5450
R
R
=4850
600
3795
17°
3000
5500
• Overall length 15.52 m, carrier length 13.3 m
• Large overhang angles of up to 20°
• Smallest turning radius of 11.01 m with all-wheel steering
• Rear counterweight radius only 4.85 m
• 60 t total weight (axle load 5 x 12 t)
• Choice of 3 tyre sizes
14.00 R 25 carrier width 3 m
16.00 R 25 carrier width 3 m
20.5 R 25 carrier width 3.1 m
8300
Modern drive concept
• Powerful, 6-cylinder Liebherr turbo-charged diesel engine
type D846 A7, 370 kW/503 hp, exhaust gas emissions
correspond to the directives 97/68/EC Stage 3 and
EPA/CARB Tier 3, robust and reliable, modern and
electronically-controlled engine management
• ZF power shift gear with automated AS-TRONIC control
system. ZF intarder fitted directly to the gear unit, 12 forward
and 2 reverse gears, automated control, reduced fuel
consumption due to a high number of gears
• 2-stage, robust transfer case with lockable transfer differential,
creeping speed 0.78 km/h
• Drive 10 x 6, axles 2, 4 and 5 driven
• Drive 10 x 8 (optional), axles 2, 4 and 5 driven, axle 1 can
be activated for off-road displacement
• Weight-optimized, robust, low-maintenance axles, perfect
track keeping and lateral stability due to special arrangement
of the steering knuckles; maintenance-free axle struts, steel
and rubber mounted
• Maintenance-free drive shafts; quick and easy fitting due to
70° diagonal toothing
• Hydropneumatic ”Niveaumatik” suspension, programcontrolled for ”setting crane on outriggers”, ”crane
displacement with equipment” and "crane displacement on
the road", suspension travel +150/-150 mm
• Lateral force released and maintenance-free suspension
rams, piston rods protected against damage
by synthetic pipes
• Sustained-action brakes:
Engine brake as exhaust retarder with Liebherr additional
brake system (ZBS), intarder on gear, optional Telma-type
eddy current brake
• Service brake:
All axles fitted with air disc brakes, high braking performance,
long maintenance intervals, rapid-change brake linings
LTM 1220-5.2 LTM 1220-5.2
Variable steering
concept with
„active rear-axle steering“
Axles 3, 4 and 5 set up as „active rear-axle steering, 5 steering
methods are preselectable by fixed programs (P):
P1: On-road steering
Axles 1 and 2 are steered mechanically with hydraulic assistance
by the steering wheel. Axles 3, 4 and 5 are steered „actively“
speed-dependent, subject to the cramp of the front axles,
and over 30 km/h, axles 3 and 4 are set to straight displacement
and fixed, from 60 km/h, axle 5 is fixed equally to straight
displacement. The change of the steering angle in accordance
with the speed, results in a precise and stable driving quality
during higher speeds, tyre abrasion is reduced and the
maneuverability clearly improved.
P2: All-wheel steering
Axles 3, 4 and 5, dependent on the steering angle of axle 1
are cramped by means of the steering wheel so that the
smallest turning radii can be performed.
P3: Crab steering
Axles 3, 4 and 5 are cramped into the same direction as axles
1 and 2 by means of the steering wheel.
P4: Steering without swerving
Axles 3, 4 and 5 are cramped in accordance with axle 1 so
that no swerve out of the rear of the carrier takes place.
P5: Independent rear-axle steering
Axles 1 and 2 are cramped by the steering wheel, axles 3, 4
and 5 steered independent of the cramp of axles 1 and 2 by
momentary-contact buttons, whereby the cramp of axle 3 is
adapted to the required situation.
• A failure in the rear-axle steering makes it ineffective and
the rear axles are set to straight displacement by the centering
rams
• Two independent hydraulic circuits with wheel- and enginedriven hydraulic pump, thus maximum safety standard
• Two independent control processors (by existing E/A modules)
and diversified sensoriel system
• Entire know-how of the „active rear-axle steering“ by Liebherr
310
Setting crane on outriggers –
quick, convenient and safe
700
• Variable support basis
outriggers retracted
Support basis 5.5 m x 8.9 m
Support basis 8.3 m x 8.9 m
• Fix-mounted supporting pads with splash guard
• Supporting ram travel of up to 700 mm
• Level control of the outriggers, all-automatic push-button
crane levelling during the supporting procedure
• 2 x 9° lateral inclination of crane and crane superstructure
• Control panels at either side of the carrier with membrane
keyboard and electronic inclination indicator, push-buttons
for ENGINE/START/STOP and speed control are illuminated
and lockable
• Operation of the outrigger system in accordance with
accident-prevention legislation
• Illumination of the supporting area by 4 incorporated
projectors
Comfortable driver’s cab
of high functionality
• Modern, comfortable driver’s cab of high functionality and
convincing design, corrosion-resistant, sheet steel version,
cataphoretic dip-primed, front mounted on rubber shock
absorbers, rear cushioned hydraulically, internal sound and
heat absorbing panelling
• Safety glass all-round, greenish tinted front and side windows
for heat absorption, electric window lifters
• Arrangement of the control elements and displays according
to ergonomical aspects for safe and convenient handling
during continuous operation
• Digital display and keyboard units interconnected with the
functional blocks by data bus technology
• Driver’s seat cushioned pneumatically, with pneumatic lumber
support, headrest
• Steering wheel adjustable in height and inclination
• Heatable and electrically adjustable rear mirrors
• Safety belts for driver and co-driver
• 3 windscreen wipers with automatic wipe/wash system and
intermittent control
• Delayed switch-off of the interior lights
• Various racks and stackers
• Radio preparation
LTM 1220-5.2 LTM 1220-5.2
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