TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
ITEM TO
NOT FULLY
MISSION
ITEM INTERVAL CHECK/
PROCEDURE
CAPABLE IF:
NO.
SERVICE
Fuel
1 7 Semi-
NOTE
system
annual
Steps a. and b. apply to M939A1series vehicles
engine
and step e. applies to M939A2 series vehicles.
All other steps are common to both vehicles.
Replace fuel filter every 3,090 mi. (4,800 km) or
3 months, whichever occurs first.
a. Replace filter in standard AFC fuel pump on all
[RPL]
M939/A1 series vehicles except M936/A1 models
b. Inspect fuel filter/water separator mounting and
housing for dents and cracks, and damage to inlet, outlet,
and bleeder fittings that could cause leaks (para. 2-15).
c. Install new fuel filter element on M939/A1 series
[RPL]
vehicles, or new fuel filter on M939A2 series vehicles
d. Inspect fuel lines for tightness of connections
e. Check fuel system components of M939A2 series
vehicles.
1. Inspect fuel injector lines, injector pump lines, and
manifold line and screws for leaks and damage. Tighten
fuel injector lines, injector pump lines, and manifold line
2. Inspect injector line holddown screws for security
[RPL]
f. Check fuel priming pump on M939/A1 series vehicles
or fuel priming/transfer pump on M939A2 series vehicles
for security of mounting and proper operation.
g. Lubricate throttle control and modulator linkages.
EXPECTED TEMPERATURES
+40F TO -15F
+40F TO -65F
ABOVE 15F
(+4C TO -54C)
(ABOVE -9C)
(+4C TO -26C)
OE/HDO 30
OE/HDO 10
OE/HDO
Lubricating oil, internal
(MIL-L-2104)
OEA
OEA
Lubricating oil, internal
(MIL-L-46167)
2-30