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 118 of 1015
TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
ITEM TO
ITEM
INTERVAL
CHECK/
NO.
SERVICE
PROCEDURE
NOT FULLY
MISSION
CAPABLE IF:
17
Semi-
Fuel
NOTE
annual
system
engine
• Steps a. and b. apply to M939A1series vehicles
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.
[RPL]
a.
Replace filter in standard AFC fuel pump on all
M939/A1 series vehicles except M936/A1 models
(para. 3-31) or in VS fuel pump on M936/A1 models
(para. 3-32).
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).
[RPL]
c.
Install new fuel filter element on M939/A1 series
vehicles, or new fuel filter on M939A2 series vehicles
(para. 3-30).
d.
Inspect fuel lines for tightness of connections
(para. 3-29).
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
and screws if leaking, and replace if damaged (para. 3-18).
2.
Inspect injector line holddown screws for security
of mounting. If loose, tighten (para. 3-18).
[RPL]
3.
Replace in-line fuel filter (para. 3-30).
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.
LUBRICANTS
OE/HDO
Lubricating oil, internal
combustion engine
(MIL-L-2104)
OEA
Lubricating oil, internal
combustion engine (arctic)
(MIL-L-46167)
EXPECTED TEMPERATURES
ABOVE 15°F
+40°F TO -15°F
+40°F TO -65°F
(ABOVE -9°C)
(+4°C TO -26°C)
(+4°C TO -54°C)
OE/HDO 30
OE/HDO 10
OEA
2-30
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