TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 99 of 890
TM 9-2320-280-20-1 Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV (Cont'd) ITEM INTERVAL ITEM TO BE PROCEDURES NOT FULLY MISSION NO. INSPECTED CAPABLE IF: 6 Semi- Cooling Annual System 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. NOTE Ž Coolant level is correct when coolant recovery tank is full TM 9-2320-280-10). Ž 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 (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 for or dry rotted. security of mounting, leaks, and deterioration. Inspect and clean as necessary the radiator and oil cooler cores. 2-8