Liebherr LHM 420 Manuel d'utilisateur télécharger pdf (Page 28)

With its headquarters located in an environmentally protected area, ecological issues have always been high on the

agenda for Liebherr-Werk Nenzing. The implementation of economy software, bio-degradable oils and special noise

insulation throughout its mobile harbour crane range are just a few examples of Liebherr’s ecological awareness.

Environmental Record

Eco-Control

The proven hydraulic drive system in combination with the

in-house developed “ECO-Control” achieves a notable

reduction of diesel consumption up to 25 % without any

impact on turn-over output. Once the designated speed of

the crane movement is achieved, the Litronic

crane con-

trol system automatically calculates the minimal required

rpm (revolutions per minute) for the diesel engine.

A further side effect is the low rpm of the hydraulic system,

which means longer lifetime of hydraulic pumps and com-

ponents. In addition, the lowered engine rpm has a direct

impact on reduction of noise exposure.

Noise Insulation

Operating Liquids

The cooling system for the engine water and the engine

charge as well as the hydraulic oil cooler are equipped with

a specially designed cooling fan minimizing turbulences

and decreasing noise emissions. Furthermore, regulated

rpm guarantees higher lifetime, less required drive power

and a decrease of fuel consumption.

Elastic suspension of the winches guarantees an additional

reduction of vibrations and noise. With the optional attenu-

ation package for the machinery as well as the winch room

a further reduction of sound pressure can be reached.

Alternatively Liebherr mobile harbour cranes can be run

on bio-diesel to comply with local regulations and the

transition to alternative fuels in customer equipment ﬂeets.

Liebherr developed biodegradable oil especially for

the Liebherr product line. In combination with spectro-

graphic oils analysis techniques oil life time is extended

and keeps components such as pumps and motors for

ever longer lifetimes.

Due to the special design of the lufﬁng gear (tension

cylinder in closed loop circuit) a minimal quantity of oil is

required.

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Liebherr LHM 420 Manuel d'utilisateur Page 28