Table 2-1. Unit Level Preventive
Maintenance Checks and Services HMMWV (Cont'd)
ITEM TO BE
NOT FULLY MISSION
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.
Coolant level is correct when coolant
recovery tank is full TM 9-2320-280-10).
Use MIL-A-46153 in temperatures
above 0°F (-18°C) and MIL-A-11755 in
temperature below 0°F (-18°C).
a. Check coolant condition. Test coolant a. Coolant condition/
to see if draining is necessary
testing shows draining
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 for or dry rotted.
security of mounting, leaks, and
deterioration. Inspect and clean as
necessary the radiator and oil cooler cores.