Engine Features - Navistar MaxxForce 7 Operation And Maintenance Manual

Engine Description (cont.)
injections and more precise fuel delivery to improve combustion,
emissions, and cold start performance.
The low-pressure fuel system uses an integrated low-pressure
fuel module with primary filter, secondary filter, fuel cooler, and
electric self-priming fuel pump to draw fuel from the tank(s) to
the engine. This integrated low-pressure module significantly
reduces the number of fuel lines and connection points, and
is mounted over the left valve cover. The primary fuel filter
assembly includes a Water In Fuel (WIF) sensor and an optional
fuel heater. Water and solids are separated from the fuel and the
water is connected in the water separator bowl. The instrument
panel WIF lamp illuminates when water needs to be drained. A
drain valve in the water separator bowl drains water out. Fuel is
discharged to the secondary fuel filter. The secondary fuel filter
assembly is pressure regulated and incorporates an air bleed
orifice to automatically purge air introduced into the system.
Optional Air Compressor
An air compressor is available for applications that require air
brakes or air suspension.
Optional Fuel Heater
A fuel heater is available and installed in the primary fuel filter
assembly. The heater warms the supply fuel to prevent waxing
during cold conditions.
Optional Coolant Heater
SECTION 1 – ENGINE SYSTEMS
A coolant heater is available to raise the temperature of the
coolant surrounding the cylinders for improved performance
during cold weather startups.

Engine Features

Aftertreatment System
The
Aftertreatment System to capture soot and other particulates
before they exit the exhaust pipe. The soot is captured by the
Diesel Particulate Filter (DPF) and is periodically converted to
carbon dioxide (CO
further information see Aftertreatment System (page 55).
engine and vehicle exhaust
) by a Regeneration (Regen) process. For
2
piping includes an
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