Table 2-1.  Unit Level Preventive Maintenance Checks and Services HMMWV (Cont'd) ITEM NO. INTERVAL ITEM TO BE INSPECTED PROCEDURES 15 Semi- Transfer Annual (Cont’d) d.  Inspect oil cooler lines for leaks or d.  Any class III oil damage. Check for loose oil cooler line leak or damage to nuts and damage to the spiral wrap on spiral wrap. the cooler line.  If oil cooler line nuts are loose, hold end of oil cooler stationary, and tighten line nuts to 194-212 lb-in. (22-24 N•m) 16 Semi- Driveline a.  Inspect geared hub vent lines and a.  Hub vent lines Annual Compo- connectors for security, cracks, and cracked, plugged, or nents deterioration. missing. b.  Inspect geared hub for leaking b.  Class III leaks or seals and damage. damage. c.  Adjust spindle bearing c.  Bearing damaged. (paragraph 6-14). d.  Inspect differential vent lines and d.  Differential vent line connectors for security, cracks, and has hole, plugged, or deterioration. cracked. e.  Inspect differentials for leaking e.  Class III leak. seals and cracks. TM 9-2320-280-20-1 Change 1 2-17 NOT FULLY MISSION CAPABLE IF: NOTE Do not overtorque retaining nuts. CAUTION Change geared hub and differential lubricants when required by mainte- nance repair action, contaminated by water or foreign material, or if lubricant appears by smell, feel, or visual indication to be overheated. NOTE •Fill each axle differential with 2 quarts (1.9 L) of GO. •Fill each geared hub with 1 pint (0.5 L) of GO.