Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV (Cont’d)

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.