Manual

Turbochargers. The single, waste-gated
turbocharger found on the C15 engine is
water-cooled to accommodate sudden hot
machine shutdowns. Water cools the
bearings during this event, preventing
bearing seizure. The C15 engine also
includes a new turbine housing and an
additional spacer bearing. The addition
of a spacer bearing eliminates snap rings
and, therefore, reduces complexity and
improves shaft motion.
The turbocharger uses an aluminum
compression wheel. Changes enable
the C15 to deliver longer life and lower
maintenance costs and contribute to good
fuel economy. The design also provides
high horsepower with improved response
time while keeping exhaust temperatures
low for long hours of continuous
operation. The waste-gate turbocharger
design improves engine response and
peak torque, while providing higher
boost over a wider range.
MEUI Fuel System. The Cat MEUI
fuel system combines the technical
advancement of electronic control with
the simplicity of direct mechanically
controlled unit fuel injection. This system
electronically controls injection pressure
by sensing the engine speed and load
conditions over the entire engine
operating speed range.
A low-pressure fuel transfer pump
provides fuel to the injectors, which
then increases the pressure to deliver
very fine, atomized fuel particles into
the combustion chamber with precise
timing and duration. The result is a
more complete fuel burn with lower
emissions and better engine response.
Oil Coolers. The 770 is equipped with
three oil coolers: an engine-mounted
engine oil cooler, an engine-mounted
transmission/torque converter oil cooler,
and a remote-mounted, brake, hoist and
hydraulic fan oil cooler. These coolers
allow major components to expel heat,
maintaining optimal operating
temperatures.
Fuel Filters. The C15 engine is equipped
with two fuel filters. The primary filter is
engine-mounted and features oil/water
separation and an electric priming pump.
The electric pump provides easier priming
and better contamination control than a
manual unit. The secondary fuel filter is
also engine-mounted, and has a switch
that monitors pressure changes and
provides pressure drop warnings to
the operator.
Advanced Diesel Engine Management
A4 Engine Controller. The ADEM™ A4
electronic control module provides
flexible fuel mapping, allowing the
engine to respond quickly to varying
application needs.
Next Generation Modular Radiator
(NGMR). The new modular cooling
system with a single-pass flow core
design uses brazed construction for
stronger joints, better leak prevention
and higher heat transfer. The simpler
design of the single-pass system, which
replaces the two-pass flow folded core
system enables coolant to enter one end
of the core and flow out the opposite end
for more efficient ambient cooling
capability and greater durability.
Hydraulic Demand Fan and Accessory
Drive. The 770 includes a standard,
variable-speed, on-demand fan. This fan
provides cooling airflow only when
necessary, resulting in reduced parasitic
losses, a reduction of fuel consumption
and fan-generated noise.
The C15 engine includes a Poly-V
accessory drive belt with an auto-
tensioner, which is self adjusting.
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