Cat 777G Haul Truck Offers Fuel Efficiency, Tier 4 Final Certification
- Published: Wednesday, 09 May 2012 16:27
The new Cat 777G off-highway truck is built for outstanding performance, production and fuel efficiency in the 100-short-ton size class, according to the company. The 777G replaces the 777F. The 777G achieves greater production with seven percent more torque powering work and new transmission controls that produce quick haul cycles with automotive quality shifting. The production increases are balanced with new fuel saving strategies that include configurable economy settings as well as an adaptive economy mode that automatically optimizes fuel consumption based on the user’s production baseline, the company said.
Fuel savings also are realized behind the scenes through features such as auto neutral idle and APECS transmission controls where the truck becomes more fuel efficient at idle in a forward gear and when climbing grades. Customers can choose to engage features like Engine Idle Shutdown and speed limiting to further improve fuel savings.
In addition to its fuel efficiency, the 777G is quieter and produces fewer emissions. Caterpillar is introducing its U.S. EPA Tier 4 Final solution on the 777G two years in advance of the effective date of the regulation, which provides customers an opportunity to advance their sustainability goals. The solution is both simple and robust and includes engine technology combined with diesel oxidation catalysts. It requires the use of ultra low-sulfur diesel fuel and low-ash engine oil, but requires no additional maintenance or operator input. For operations outside of areas regulated by the U.S. EPA, the 777G reduces emissions with Tier 2 or EU Stage II equivalent technology and fuel efficiency.
Caterpillar has enhanced braking and traction control for G Series. Hydraulic oil-immersed disc brakes are now standard on all four corners of the truck. The system design increases slope holding capability and provides fade resistant, responsive braking performance. Design updates extend brake component life by increasing the force used to disengage the brakes. The optional Cat engine brake can extend service brake life and integrates with Automatic Retarder Control, enabling fast downhill travel and reduced cycle times.
The new parking brake system actuates the front brakes as well as the rear for solidly holding the truck on a slope. In addition to brake performance updates, the traction control system on the 777G is now able to differentiate between tire spin and high speed turns so it now can activate at lower speeds. The system now uses the hydraulically applied service brakes for improved response time and modulation from one wheel group to the other.
Object Detection comes standard on the 777G. Using a combination of radars, an in-cab display and multiple cameras, Object Detection provides equipment operators with enhanced awareness for increased site safety. The 777G also offers tire monitoring through use of payload values from the Truck Production Monitoring System and data such as air temperature and truck speed to calculate the load placed on tires. As tires approach their rated load-speed rating, a warning is given and customers can choose a course of action, including slowing down or reducing payload.
Maintenance is quick and convenient with ground level service centers for both electrical connections (located on the front bumper) and fluid fill. The optional fluid fill center provides access to all fluids from one centralized location. It includes a lighted keypad with level indicators giving operators instant information on what needs filling. Additional fluid level monitoring is available to the operator in the cab. Caterpillar is extending its hydraulic oil filter service intervals to 1,000 hours, reducing customer life cycle costs.