Cat intros 777G off-highway truck with redesigned cab, new engine

Caterpillar has launched the latest version of its 777, an off-highway truck the company says now has more visibility, improved operator comfort and better fuel efficiency.

Powered by a Cat C32 ACERT Tier 4 Final engine delivering 1,025 gross horsepower, the new 777G also features a 7-percent increase in torque and a higher top speed of 41.7 miles per hour.

Maybe the marquee feature of this new truck is the redesigned cab. Cat says it is easier to enter and exit and features a new operator seat on the left and a more comfortable trainer seat on the right.

The cab also features more interior space for storage and a new console with an integrated hoist-and-shift lever. Cat says the new design also increases visibility.

Major structures

Cat says the 777G’s major structures are designed to last through “more than one powertrain life cycle,” thanks to box-section castings in high-stress areas, a new front frame design that increases approach angle on ramps and grades, and a heavy-duty rear axle housing.

The body of the truck is a Dual Slope design that ensures optimum material retention on haul roads with steep slopes. The body also carries material low and centered for stability.

Rated payload for the truck is 98.4 tons, with a standard-body volume (SAE 2:1) of 83.8 cubic yards. Heaped capacity is 78.8 cubic yards in the standard configuration.

Two side-board sizes are available to increase capacity for lighter weight materials.

Fuel saving features

The truck also has two operating modes and a few other features that save on fuel. Here’s how they break down:

  • Standard Economy operating mode: Saves fuel by reducing engine power by 0.5 to 15 percent based on the fleet and economic conditions at a particular site.
  • Adaptive Economy operating mode: Automatically evaluates the power rating needed to meet the baseline requirements for a site once a production baseline is entered.
  • Auto Neutral Idle: Allow the 777G transmission to intermittently shift to neutral when the truck is idling in a forward gear to avoid stalling the torque converter and increasing engine speed.
  • Engine Idle Shutdown: Stops the engine when the truck idles in park for more than a preset interval.
  • Speed Limiting: An alternative to gear-limiting the truck by allowing it to travel at a more fuel-efficient engine speed and in a more efficient transmission gear.
  • Advanced Productivity Electronic Control Strategy (APECS): These transmission controls boost fuel efficiency by maintaining momentum and speed on uphill grades during shifts.