Fuel Tank: Description and Operation

FUEL TANK AND LINES - DIESEL ENGINE

Fuel System Component Location - Midship Fuel Tank:

Fuel System Component Location - Midship Fuel Tank

Fuel System Component Location - Aft of Axle Tank:

Fuel System Component Location - Aft of Axle Tank

The fuel system consists of:
- the fuel tank.
- The midship fuel tank is between the frame side rails on the left hand side.
- The aft of axle fuel tank is mounted between the side rails.
- a fuel tank filler pipe without a restrictor plate.
- a threaded fuel tank filler cap.
- a fuel filter and water separator to protect the fuel injectors.
- fuel lines.
- an internal check valve with a built in orifice that will bleed off system pressure approximately 10 minutes after the engine is shut off.
- a frame mounted in-line fuel pump and isolator assembly which provides pressurized fuel to the engine and contains:
- an integral non-serviceable coarse inlet filter.
- a pressure relief valve for overpressure protection in the event of restricted flow.

The diesel engine fuel system also incorporates:
- a non-serviceable fuel recirculation/filter unit (located inside the fuel tank on the fuel sender assembly).
- a frame rail mounted auxiliary fuel filter (located on the driver side frame rail between the fuel tank and the fuel pump).

These items assist in preventing the fuel from gelling in the fuel lines during cold weather operations.

The fuel pump is controlled by the fuel pump powertrain control module relay. Electrical power to the fuel pump is provided through the Inertia Fuel Shutoff (IFS) Switch.