TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 377 of 481
TM 9-2320-272-10
3-28
3-8. ENGINE SERVICE (Contd)
f.
Air Cleaner.
WARNING
If NBC exposure is suspected, all air filter media should be handled
by personnel wearing protective equipment. Consult your unit NBC
officer or NBC NCO for appropriate handling or disposal instructions.
(1) General.
Air cleaner service is required whenever the red band is visible
in window of air cleaner indicator (3). The operator will service the air cleaner in an
emergency situation only. Notify unit maintenance as soon as possible.
(2) Removal.
WARNING
Keep fingers out from under or directly above the locking end of
securing latches during removal or installation. Injury will result if
fingers are caught under latches and/or if fingers are struck by latch
when unsnapped.
e. Fuel Filter/Water Separator
(Contd).
(2) Priming Fuel System.
(a)
The fuel system must be
primed whenever the fuel filter/water
separator element is replaced and after any
draining of the fuel system.
(b)
Open air purge drainvalve (1)
at hand primer pump (2).
(c)
Place a container under air
purge drainvalve (1). Operate hand primer
pump (2) to discharge a combination of fuel
and air from the fuel system. Continue
pumping until all air is expelled and a steady
flow of fuel is observed. Stop hand primer
pump (2) operation and close air purge
drainvalve (1). Dispose of waste fuel properly.
(3) Final Inspection.
Start engine
(para. 2-12) and check for unusual noises and
fuel system leaks.
CAUTION
Do not operate engine without
an air cleaner element. Failure
to do so may result in internal
engine component damage.
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