TM-9-2320-260-20
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
APRIL 1995
TM-9-2320-260-20 - Page 63 of 1337
TM 9-2320-260-20
1-19. POWER SYSTEMS OPERATION (Contd)
d. Fuel System Operation - Dual Tanks.
A
B
C
D
E
F
G
H
I
J
K
L
M
FUEL PUMP
– Draws fuel from tanks and supplies it to fuel injectors.
BREATHER
– Vents vapors collected from fuel tanks.
FUEL TANK VENT LINE
– Vents vapors from left and right fuel tanks and directs them to
breather.
FUEL TANKS
- Stare fuel for vehicle use.
FUEL FILLER CAP
- Covers fuel filler opening.
FUEL LEVEL SENDING UNIT
- Electrical signal registers fuel level in tanks at gage on
instrument cluster.
FUEL TANK-TO-SELECTOR VALVE SUPPLY LINE
- Directs fuel from tank to selector valve.
FUEL RETURN LINE
- Returns unused fuel to tanks.
FUEL SELECTOR VALVE
- Manual control valve that opens fuel flow to engine from left or
right fuel tanks.
SELECTOR VALVE-TO-FUEL FILTER SUPPLY LINE
- Directs fuel from selector valve to
fuel filter.
FUEL FILTER/WATER SEPARATOR -
Filters water and dirt from fuel system.
FUEL FILTER-TO-FUEL PUMP SUPPLY LINE
- Directs fuel from fuel filter to fuel pump.
FUEL FILTER DRAIN VALVE
- Opened prior to purging fuel filter/water separator of water
and dirt.
1-50
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