Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV (Cont’d).
ITEM
NO.
INTERVAL
ITEM TO BE
INSPECTED
PROCEDURES
5
Semi-
Protective
a. Inspect four bolts for security of
a. Mounting not secure,
annually
Control
mounting.
four bolts loose.
Box
b. Ensure cannon plugs are securely
connected to box.
6
Semi-
Cooling
annually
System
a. Check coolant condition. Test coolant a. Coolant condition/
to see if draining is necessary
testing shows draining
(TB 750-651).
is required.
b. Inspect surge tank, radiator shroud, b. Any class III water
power steering cooler, oil cooler, all
leak. Hoses cracked
hoses, quick-disconnects, and fittings
or dry-rotted.
for security of mounting, leaks, and
deterioration. Inspect and clean as
necessary the radiator and oil
cooler cores.
NOTE
• Coolant level is correct when
coolant recovery tank is at the
full mark (TM 9-2320-387-10).
• Use MIL-A-46153 in temperatures
above 0°F (-18°C) and MIL-A-
11755 in temperatures below
0°F (-18°C).
TM 9-2320-387-24-1
2-8
Change 1
NOT FULLY MISSION
CAPABLE IF:
WARNING
If vehicle has been operating, use
extreme care to avoid being burned
when removing cooling system
radiator cap. Use heavy rags or gloves
to protect hands. Turn radiator cap
only one-half turn counterclockwise
and allow pressure to be released
before fully removing cap.
