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Liebherr’s R 916 Is 6th Generation Advanced Litronic Crawler Excavator

Wed August 24, 2011 - National Edition
CEG


Liebherr’s R 916 advanced litronic has a four-cylinder diesel engine with an output of 157 hp (115 kW).
Liebherr’s R 916 advanced litronic has a four-cylinder diesel engine with an output of 157 hp (115 kW).

Liebherr’s R 916 advanced litronic has a four-cylinder diesel engine with an output of 157 hp (115 kW). This construction-machinery engine complies with the Stage IIIA/Tier III exhaust emission regulations. By avoiding unnecessary engine speed changes, the CAN bus integrated engine management system optimizes fuel consumption and makes better use of the available power, according to the manufacturer.

New “Positive Control” Hydraulic System

In view of the large number of hydraulic consumers that often have to actuate three or more overlapping or synchronized functions, modern hydraulic excavators need advanced, technically mature systems. All Liebherr 6th-generation crawler excavators are therefore equipped with the “positive control” hydraulic system and the corresponding control logic.

By supplying an ample flow volume available quickly and making full use of the available energy, the two independent hydraulic circuits energize the hydraulic circuits in the most efficient way, especially when overlapping movements are per-formed. Maximum speeds are obtained for individual movements by combining the outputs from the pump circuits.

With its “positive control advanced” hydraulic system, the R 916 advanced litronic has performance advantages when superimposed movements are performed, for instance when grading surfaces or when travelling in a straight line or following a curved path, according to the manufacturer.

The higher operating pressure also boosts tractive, tearout and breakout forces.

As well as Liebherr master and input/output modules, the new Liebherr excavator system technology includes integrated engine and power management and a man-machine interface. Sensors located at strategic points on the excavator form a basis for this intelligent system, for faster, smoother working movements.

A typical benefit of Liebherr excavator system technology is easy operation of hydraulic attachments. The working pressure and the necessary volume of oil can be input quickly and accu-rately with the tool management. This system technology also incorporates basic equipment for the LiDat on-board diagnostic system, which is the key to even greater economy in modern machine fleet management according to modern busi-ness-management principles.

Advanced Cab With Unique Convenience Standards

The large advanced cab gives the operator a feeling of space. The windscreen, roof and right-hand cab windows are of splinterproof two-layer safety glass and the windscreen can be fully retracted. For even greater safety, the cab complies with ROPS requirements, and the hydraulic hoses between the control valves and the base of the boom have been re-routed to give the operator a larger field of view.

The large, high-resolution 7-in. color display can be operated as a touch screen or as a turn-and-push knob. It has video-compatible resolution and incorporates a wide variety of adjustment, checking and monitoring facilities. The display screen is glare-proof and has automatic brightness and contrast control.

Xenon lights are available as an optional extra for the best possible work-area visibility. Proportional control is another optional extra: it improves precision and sensitivity even further when working with hydraulic add-on equipment such as a trench clearing bucket, according to the manufacturer.

Optimized Structural Steelwork, Improved Drive Trains

The 6th-generation crawler excavator’s undercarriage has been designed for increased performance and longer troublefree operation. The center-section connections are ex-tended as far as the ends of the side members in an X-pattern layout that distributes forces more effectively and prolongs undercarriage life.

The new slewing platform structure acts as the basis for the ROPS-specification cab. The large-diameter slewing ring distributes the forces that occur here more effectively, so that operating life is again increased.

Weight- and function-optimized structural steelwork is a new development in the equipment area. Increased box section dimensions enhance the excavator’s ability to withstand severe loads. The R 916 Advanced achieves breakout forces of up to 179 kN and tearout forces as high as 139 kN.

For more information, call 757/928-8746 or visit www.Liebherr.com.