With an average fuel consumption of 38 litres per hour, Liebherr is setting new standards for cost-effective materials handling in the mining sector with its flagship, the eighth generation PR 776 Crawler Dozer. The new assistance systems, now available for these machines, improve efficient and user-friendly operation.
Liebherr OAS – Operator Assistance Systems
The new 70-tonne PR 776 Generation 8 is now equipped with advanced Operator Assistance Systems (OAS), which were previously only available on smaller models. The Assistance Systems offer two levels of driver support: Free Grade for active Blade Stabilisation during fine grading and Definition Grade for automatic blade positioning when creating 2D graded surfaces. With the new Auto Blade Pitch Assistance System, the driver can save and then call up three blade positions at the touch of a button. Position 1 offers perfect penetration characteristics, position 2 allows optimum material transport and position 3 facilitates quick emptying of the blade at the end of the dozer push section. The advanced Operator Assistance Systems of the PR 776 G8 not only increase efficiency and operating comfort, they also raise productivity.
Reliability: tough components produced in-house
For decades, Liebherr diesel engines have proven themselves world-wide in construction machinery. Developed for the harshest operating conditions, their robust build and state-of-art technology assure maximum operational safety and long service life. Liebherr's well-known hydrostatic drive system eliminates high-wear components, such as gearboxes, steering clutches or service brakes. The high-quality hydraulic pumps and motors operate almost entirely without mechanical wear and offer exceptional reliability. Liebherr offers for its Crawler Dozers a wide range of factory-fitted, field-tested equipment packages for various ambient temperatures - from desert operation to extreme cold conditions.
Easy maintenance
Optimum access for servicing and extended maintenance intervals are the main features of the PR 776 from Liebherr. Centralised maintenance points, wide-opening access hatches and engine compartment doors, a standard tilting driver's cab and an optional cooling fan that can be swung out for cleaning, facilitate quick maintenance access and easy servicing for the new Crawler Dozer. The new eighth generation Crawler Dozer is also noted for the particularly long change intervals for hydraulic fluid and engine oil. When using Liebherr Plus oils, these intervals, depending on application and with regular checks, can extend up to 8,000 operating hours.
Maximum driver comfort - as standard
Liebherr mining dozers offer first-class cabin comfort. Drivers appreciate the comfort and ease of operation using a single joystick for all driving and steering movements. Safety has also been increased due to the unrestricted 360-degree all-round view of the blade and ripper, afforded by large panoramic windows and the integrated ROPS/FOPS grille in the cabin structure.
Future-proof with the Liebherr LiReCon teleoperation system
In a working environment that places high demands on man and machine, the Liebherr Remote Control System (LiReCon) increases safety, comfort and productivity. The system is suitable for all applications of Crawler Dozers. It consists of the Liebherr Remote Control teleoperation stand. This includes a state-of-the-art operator station, together with all the necessary switching elements and on-board installations on the Crawler Dozer, such as, various cameras with different angles and views, microphones for recording machine noise, and radio receivers and transmitters.
LiReCon facilitates quick end-of-shift changeover between operators and consequently reduces idle and downtime. As the operator is no longer tied to the machine, it allows customers to extend operation to new mining areas in hazardous zones, thus expanding the application scope for Liebherr Mining Crawler Dozers.
