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 119 of 1015
TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
ITEM TO
ITEM
INTERVAL
CHECK/
PROCEDURE
NO.
SERVICE
NOT FULLY
MISSION
CAPABLE IF:
28
Semi-
Protective
Inspect control box and quick-disconnect for security
annual
control box of mounting and connection. Tighten control box mounting
screws and/or quick-disconnect, if loose (para. 3-115).
29
Semi-
Engine
Inspect all engine compartment wiring for frays, splits,
annual
compart-
missing or damaged insulation, or poor connections.
ment
Repair or replace affected wiring (para. 3-131).
electrical
wiring
30
Semi-
Fuel lines
NOTE
annual
and tank
On dual tank fuel systems, inspect left side of tank
when performing other tasks conducted in that area
of the vehicle. Ensure any problem found while
inspecting right and left side component systems is
noted in maintenance forms.
a.
Inspect fuel tank(s) for dents, cracks, and broken
welds that could cause leaks.
b.
Visually inspect fuel sending unit(s) and wiring for
loose connections, presence, frays, splits, and missing
insulation (para. 3-131). Repair or replace wiring
that is missing or shows signs of frayed, split, or missing
insulation. Tighten loose connections (para. 3-92).
c.
Visually inspect tube(s) and hose(s) at fuel tank(s) for
loose connections, cracks, and splits. Replace fuel tank
tube(s) and hose(s) that are cracked or split (para. 3-26).
Tighten loose fuel tank tube(s) and hoses connections.
d.
Inspect fuel tank selector valve on dual tank model
vehicles for freedom of operation and security of mounting,
and check flex lines for leaks (para. 3-24).
e.
Check fuel tank selector valves for proper operation
(TM 9-2320-272-10).
31
Semi-
Transmis-
annual
sion and
WARNING
transfer
• If transmission oil temperature is above 220°F
case
(104°C), allow transmission oil to cool before
removing dipstick.
• Accidental or intentional introduction of liquid
contaminants into the environment is in violation
of state, federal, and military regulations. Refer
to Army POL (para. 1-8) for information con-
cerning storage, use, and disposal of these liquids.
Failure to do so may result in injury or death.
2-31
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