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 —
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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