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 46 of 1015
TM 9-2320-272-24-1
1-21. POWER SYSTEM OPERATION (Contd)
b. Fuel System (Dual Tank) Operation.
(1)
The fuel system stores, cleans, and supplies fuel to the fuel injectors, where it is mixed with air
to initiate engine combustion.
(2)
The fuel system is not identical for all models. Vehicles covered in this manual have either one or
two tanks. These tanks can also differ in capacity. See table 1-3, Vehicle Performance Data, for these
differences.
(3)
A typical dual tank fuel system is described below. A single tank fuel system is described in
para. 1-21c. Both systems include fuel supply, return, and vent lines to provide fuel flow and release the
fumes throughout the system. Major components of the dual tank fuel system are:
1-36
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