CAPITAL EQUIPMENT NEWS
MAY 2014
18
LIFTING
T
he load capacity of the new LTM
1160-5.2 has been increased by
around 20-25% compared to its
predecessor the LTM 1160-5.1 whilst the
telescopic boom has remained at the same
length of 62 m (203 ft). The vehicle width
has been reduced from 3 m to 2.75 m
(9,10˝ to 9˝) which means that not only is
it easier to drive on public roads but also
considerably easier on constricted sites. The
superstructure of the new LTM 1160-5.2 is
powered by the engine in the crane chassis
using a mechanical shaft. This makes the
new 5-axle vehicle the second crane model
to feature the innovative single-engine drive
concept which Liebherr first presented at
the bauma 2013 for the LTM 1300-6.2.
The six-part 62 m (203 ft) long telescopic
boom on the new LTM 1160-5.2 is
telescoped in and out easily via the tried and
tested rapid action TELEMATIK telescoping
system. With its 10.8 m to 19 m (40 ft to
118 ft) folding jib and additional telescopic
boom extensions, the new LTM 1160-
5.2 can achieve hoist heights of up to
Liebherr LTM 1160-5.2 mobile crane
THE MOST POWERFUL CRANE IN ITS CLASS
93 m (305 ft) and outreaches of up to
76 m (249 ft). The folding jib can be erected
to an angle of 0°, 20° or 40°. An optional
hydraulic adjustment facility for the folding
jib is available, enabling it to luff under full
load between 0° and 40°. For work in two
hook operation, a second hoist gear and
a 2.9 m (10 ft) assembly jib and a rooster
sheave is available.
The maximum ballast of the new LTM
1160-5.2 is 54 t (119,000 lbs) with a width
of 4.27 m (14 ft). The base plate with 10 t
(22 050 lbs) and a 4 t (8 820 lbs) ballast
plate have the same width as the vehicle.
With a total weight of 60 t (132 000 lbs) and
a 12 t (26 400 lbs) axle load, the crane can
carry its double folding jib, a 3-sheave hook
block and a storage box with a generous
payload.
The LTM 1160-5.2 features the new
Liebherr concept for powering the
superstructure. Instead of the twin-engine
concept normally used on cranes in this
class the new Liebherr crane is powered
by a single engine with a mechanical shaft.
A mechanical shaft ensures a particularly
high efficiency level and low engine speeds
in the chassis engine provide sufficient
power for crane work. This ensures the
economy of the new concept in terms of
fuel consumption. The benefits of omitting
a separate superstructure engine include
a reduction in the amount of maintenance
work and a reduction in weight. The omitted
weight can be used for load-bearing
components, thus increasing the crane’s
load capacity.
An add-on program has been developed for
the new crane drive concept with just one
engine and a mechanical shaft to allow the
machine to be run with low fuel consumption.
This enables the complete pump drive to
be disconnected automatically when the
engine is idling and then reconnected by the
intelligent controller in a matter of seconds
when it is required.
A six-cylinder Liebherr diesel engine which
develops 400 kW / 544 h.p. at 1900 rpm
and torque of 2,516 Nm at 1350 rpm
provides the LTM 1160-5.2 with all the
power it needs. The engine complies with
the emission regulations of Directive 97/68/
EC - Stage 4 and Regulation EPA/CARB –
Tier 4 final in the USA.
The force is transferred to the crane axles
via the 12-speed ZF-AS Tronic gears. The
intarder, a zero wear hydrodynamic brake
integrated in the gearbox, acts as a retarder.
In addition, a Telma eddy current brake is
available as an option. Like almost all LTM
mobile crane models today, the LTM 1160-
5.2 features pneumatic disc brakes.
The rear axles of the new 160-tonne
(190 US-ton) mobile crane have active
electro-hydraulic steering depending
on the vehicle speed. This increases
the manoeuvrability of the vehicle and
drastically reduces tyre wear. Five steering
programs can be selected conveniently at
the touch of a button.
b
A new concept for powering the
superstructure is using only
one engine and a mechanical
shaft, thereby ensuring low fuel
consumption.
