Table 2-1.  Unit Level Preventive Maintenance Checks and Services HMMWV (Cont'd) ITEM NO. INTERVAL ITEM TO BE INSPECTED PROCEDURES 26 Semi- Arctic Inspect all fuel lines for loose connec- Any class III leak. Annual Winterization   tions, splits, cracks, and bends that Kit and/or could cause leaks. Tighten loose connec- Troop/Cargo    tions and replace damaged parts. Winterization Kit 27 Semi- Final Road Check vehicle for proper operation Vehicle fails to operate Annual Test and performance. properly. 28 Annually Fuel Replace filter element every 6,000 System miles (9,600 km) or annually, which- ever occurs first. Replace water sepa- rator element if unserviceable (para. 3-33). 29 Annually Air-Intake Test CDR valve (para. 3-9). System 29.1 Annually Dust Visually inspect dust unloader for Dust unloader missing or Unloader presence and for cuts, tears, has cuts, tears, obstruc- obstructions, worn areas, enlarged tions, worn areas, gap, or if center opening exceeds enlarged gap, or if center 1/8 in. (3.175 mm). opening exceeds 1/8 in. (3.175 mm). TM 9-2320-280-20-1 Change 1 2-25 NOT FULLY MISSION CAPABLE IF: NOTE If Annual/Biennial Service is being performed, then Final Road Test will be completed after last Annual/ Biennial task is complete.