TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 48 of 1015
TM 9-2320-272-24-1
1-21. POWER SYSTEM OPERATION (Contd)
c. Fuel System (Single Tank) Operation.
Major components of the single tank fuel system are:
Key
1
2
3
4
5
TANK (FRONT) VENT LINE
- Vents vapors from fuel tank to vent hole in air intake stack.
6
FUEL FILTER/WATER SEPARATOR
- Filters water and dirt from fuel.
7
FUEL RETURN LINE
- Returns unused fuel back to fuel tank.
8
FUEL PUMP
- Draws fuel from tank and pumps it through supply line to fuel injectors.
9
FUEL SUPPLY LINE
- Directs fuel from fuel pump to fuel injectors.
10
FUEL PRIMER PUMP
- Purges air from fuel system.
1-38
Item and Function
TANK (REAR) VENT LINE
- Vents vapors from fuel tank to vent hole-in air intake stack.
TANK FILLER CAP
- Covers fuel filler opening.
FUEL TANK
- Stores fuel for vehicle use.
FUEL TANK LEVEL SENDING UNIT
- Electrical signal registers fuel level in tank at gauge on
instrument panel.
Back to Top
