User Manual

Powerful Performance. The Cat
®
C4.4
with ACERT™ Technology introduces
a series of evolutionary, incremental
improvements that provide breakthrough
engine performance. The building blocks
of ACERT Technology are fuel delivery,
air management and electronic control.
ACERT Technology optimizes engine
performance while meeting U.S. EPA
Tier 3 engine emission regulations.
The Cat C4.4 engine in the M315D
delivers a maximum gross power of
108 kW (145 hp) at a rated speed of
2,000 rpm. This is 13% more horsepower
as compared to the 3054E in the M315C.
Low Fuel Consumption. The C4.4 is
electronically controlled and uses the
new Cat Common Rail Fuel System and
fuel pump. This combination provides
outstanding fuel consumption during
both production and travel. When the
system recognizes roading application
the engine adjusts to the most efficient
system operating point to save fuel
without compromising road performance.
Low Noise, Low Vibration. The Cat C4.4
design improves operator comfort by
reducing sound and vibration.
Cooling System. An electronically
controlled, hydraulic motor drives
a variable speed on-demand fan for
engine coolant and hydraulic oil.
The optimum fan speed is determined
based on coolant and hydraulic oil
temperature resulting in reduced fuel
consumption and lower sound levels.
The electronic engine control
continuously compensates for the
varying fan load, providing consistent
net power, regardless of operating
conditions.
One-Touch Low Idle Control.
The two-stage, one-touch Automatic
Engine Speed Control reduces engine
speed if no operation is performed,
maximizing fuel efficiency and
reducing sound levels.
Waste Handling Package. The Waste
Handling Package has been specifically
developed for Cat Wheel Excavators
working in waste transfer stations or
other extremely dusty applications.
This option features the following:
• An automatic, hydraulic reversible
fan that reverses airflow after a set
interval, manually adjustable between
5 and 60 minutes with a switch
located inside the cab.
• A special dense wire mesh cooling
system hood further reduces
radiator clogging.
• Two cyclone filters provide clean
filtered air to the engine compartment,
air cleaner, aftercooler and air
conditioner condenser.
4
Engine
Built for power, reliability, low maintenance, excellent fuel economy and low emissions.