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Cat launches 777G off-highway truck

First publishedon www.AggBusiness.com
April 2012
Cat 777G off highway truck
The new Cat 777G off-highway truck replaces the 777F and is said to deliver greater levels of production and fuel efficiency as well as enhanced safety, operator comfort and service convenience in the 91tonne class.

The 777, first introduced by Caterpillar in 1977, has proven to be a workhorse for mining and large earthmoving customers, says the company.

The 777G achieves greater production 7% 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 optimises fuel consumption based on the user’s production baseline. Fuel savings also are realised behind the scenes through features such as auto neutral idle and APECS (Advanced Productivity Electronic Control Strategy) transmission controls where the truck becomes more fuel efficient at idle in a forward gear and when climbing grades,” says Caterpillar.

“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 US 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 sulphur diesel fuel and low ash engine oil, but requires no additional maintenance or operator input.”

In addition to its fuel efficiency, the 777G, powered by a Cat C32 ACERT engine, is quieter and produces fewer emissions. For operations outside areas regulated by the US EPA, the 777G reduces emissions with Tier 2 or EU Stage II equivalent technology and fuel efficiency.

Caterpillar has also enhanced braking and traction control for the G Series with hydraulic oil-immersed disc brakes as standard on all four corners of the truck. 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 tyre 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.

The 777G also features new designs to enhance the safety and comfort of operators and maintenance personnel with the operator experiencing 50% less sound in the cab compared to the previous model.

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.

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