Quarry Southern Africa May 2019 - Page 13

GLOBAL NEWS Caterpillar launches new 777G dump truck Caterpillar has launched the new 777G dump truck. Replacing the Cat 777F model, the new Cat 777G off-highway truck has a rated payload of 89.4t and a standard- body volume (SAE 2:1) of 64.1m3. It is powered by a Cat C32 ACERT engine that delivers 765kW (1 025hp) and meets international emission standards. The engine incorporates a number of fuel-conservation features, including: Auto Neutral Idle, which allows 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; and Engine Idle Shutdown, an operator-selected feature that stops the engine when the truck idles in park for more than a pre-set interval. In addition, speed limiting provides an alternative to gear limiting the 777G by allowing the truck to travel at a more fuel-efficient engine speed and in a more efficient transmission gear, while Advanced Productivity Electronic Control Strategy (APECS) transmission controls boost fuel efficiency by maintaining momentum and speed on uphill grades during shifts. The 777G also features two operating modes: Standard Economy saves fuel by reducing engine power by 0.5–15%, based on the fleet and economic conditions at a particular site; while Adaptive Economy automatically evaluates the power rating needed to meet baseline requirements — www.quarryonline.co.za  full power is applied when needed, and reduced power is applied when appropriate. The efficiency of the new truck’s performance is further enhanced by 7% more engine torque and an increase in top speed. The 777G features a redesigned cab that is easier to enter/ exit and comes with a new operator seat on the left and a more comfortable trainer seat on the right. A new console with an integrated hoist-and-shift lever enhances convenience, as does more interior space for storage. The truck’s design also provides improved visibility of both the work area and instrumentation, while overall visibility can be further enhanced with an optional object-detection system. For convenience, the cab spec includes a powered left window, automatic temperature control, throttle lock for long uphill grades, and a 50% reduction in interior sound level compared with previous models. Powerful wet-disc brakes are used at all four corners and provide parking brake and slope-holding capability. Brake life can be extended with an engine brake, while a brake-wear indicator facilitates timely maintenance. Automatic retarding adds to positive control on downhill grades and a new steering-sensitive traction-control system assists when ground conditions deteriorate.  QUARRY SA | MAY/JUNE 2019_11