TM-9-2320-260-20

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

APRIL 1995

TM-9-2320-260-20 - Page 61 of 1337

TM 9-2320-260-20

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1-19. POWER SYSTEMS OPERATION (Contd)

c. Fuel System Operation - Single Tank

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FUEL PUMP -

Draws fuel from tank and supplies it to fuel injectors.

BREATHER -

Vents vapors collected from tank.

FUEL TANK VENT LINE –

Vents vapors from front and rear of tank through breather.

FUEL RETURN LINE -

Returns unused fuel back to tank.

FUEL LEVEL SENDING UNIT –

Electrical signal registers fuel level in tank at gage on

instrument cluster.

FUEL FILLER CAP -

Covers fuel filler opening.

FUEL TANK –

Stores fuel for vehicle use.

FUEL TANK-TO-FILTER SUPPLY LINE –

Directs fuel from tank to fuel filter.

FUEL FILTER/WATER SEPARATOR –

Filters water and dirt from fuel.

FUEL FILTER-TO-FUEL PUMP SUPPLY LINE –

Directs fuel from filter to fuel pump.

FUEL FILTER DRAIN VALVE –

Opened prior to purging fuel filter/water separator of water

and dirt.

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