LH range of Liebherr handlers includes three models
By Paul Hill, Senior Product Manager - Industrial Handlers, Liebherr Construction Equipment Co.
In 2011, Liebherr introduced to the United States the first of a new line of industrial handlers using the nomenclature ‘LH’ (Liebherr Handler) with the arrival at CONEXPO/Con-Agg of the 300,000 lb. class LH120C. The LH120 is the inception of a completely new design philosophy from Liebherr – the first of a dedicated line of machines for bulk handling in ports. This machine is available as a crawler unit with the option of a 6’ 7” high-rise section. The advantages of the high rise unit include optimal visibility and an improved working envelope for the attachment when loading and unloading ocean-going vessels.
The standard build includes a high rise undercarriage and 8’ 3” fixed cab elevation; it comes complete with high impact safety glass plus an extra pane beneath the operator’s feet allowing unrivalled visibility to the working area below. The reach of this 300,000 lb. machine is a class leading 85 ft.
Additionally, the newly designed range of Liebherr GMZ lightweight clamshell buckets are offered with capacities from 4.5 to 8.0 cu. yd., depending on the density of the material handled. For scrap handling, the new Liebherr GMM range of grapples with a range of capacities from 2.25 cu. yd. to 4.0 cu. yd., have been introduced in conjunction with this new model.
LH 120 model safety features include a full set of ten halogen lights on the cab roof and on the working attachment allowing efficient operation after dark. Standard catwalk and railing systems extend from the ground to both the operator’s cab, and also to the fully-enclosed engine and hydraulic system sections of the upper deck, allowing safe and easy access at all times. Also standard equipment are an overload warning device, travel alarm, rear view monitoring by camera at the operator station, a second seat in the roomy operator’s cab, and integrated safety tie-down cleats for the maintenance crew. Other useful features of the Liebherr LH120 include a fully automated centralized greasing system, and filling with environmentally friendly hydraulic oil, a necessary standard when operating close to water.
The modular concept of the LH120 models becomes ever more comprehensive in 2012 with the introduction of both mobile and crawler gantry undercarriages, various operator cab choices, and an ever wider range of working attachments.
The Liebherr LH120 has been carefully designed for materials handling following a comprehensive study of the market’s needs; it is a truly innovative model which should prove to be a class leader in this sector.
Also in 2012, LH60M and LH80M machines replace the A944C-HD and A954C-HD. The new models remain much the same size as their predecessors with only minimal increase in service weight. The performance of the machines is improved with the introduction of new, more efficient Liebherr Tier-IV interim engines and Liebherr’s patented energy recovery cylinder making for greater lifting duties and improved productivity.
The energy recovery cylinder is a nitrogen charged device which is located between the hoist cylinders at the base of the boom. Its principle is to assist with the boom-up function, taking less power from the engine and pumps, so allowing more hydraulic flow for other functions. When the boom is lowered, the cylinder recharges. When lifting the equipment the compressed gas supports the boom cylinders; when lowering the equipment, the gas is compressed in the energy recovery cylinder. Including this item within the standard build of the LH60M and LH80M has given Liebherr the opportunity to optimize engine output, usefully improving fuel consumption.
The Liebherr D936 engine in the LH80M has a common-rail injection system, two-stage turbocharger, externally cooled exhaust gas recirculation and includes a standard particulate filter as part of its conforming to the Tier-IV (i) standard. The LH80M also benefits from more comprehensive catwalk and railing arrangements, increased swing speed and Liebherr PME Product Management Electronics which monitor all hydraulic and engine functions constantly with the stated aim of greater efficiency.
Additionally, Liebherr Power Efficiency (LPE) allows for the more efficient interaction of perfectly matched components with reduced pump speed and less flow throughout the hydraulic system. Engine management is optimized resulting in more efficient operation of drive train components; in particular, the reduced diesel engine speed reduces the fuel consumption as well as noise and exhaust emissions.
Both the LH60M and LH80M benefit from a fresh and exciting new upper-carriage design with a smooth finish to the counterweight surface, improved lighting design with high intensity bulbs and an enlarged fuel tank. The generator drive pump is now integrated within the hydraulic system. Steering, outriggers and swivel circuit functions are now taken care of by a variable displacement pump which replaces the previously installed gear type version. The new machine has separate Load Sensing Control (LSC) valve blocks for the grapple rotation function, cab elevation (now proportionally controlled) and the LSC is also available if extra hydraulic circuits are specified for optional attachments.
Over the next two years it is the intention to replace all of the Liebherr industrial handling range with new LH models; keeping the Liebherr name synonymous with advanced technology and further differentiating ourselves from competitors.
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