TM 9-2320-302-10 0012 00-32 Table 1. Preventive Maintenance Checks and Services (PMCS) for M915A3 - Continued. Item No. Interval Location Procedure Not Fully Mission Capable If: Item To Check/ Service OVER- ALL VEHICLE 60 Monthly Undercar- riage, Frame, Cab, and Propeller Shafts a. Check  for  obvious  damage  to frame and undercarriage. a.  Any loose or broken frame side rails, crossmembers,    bro- ken welds, or broken bolts are found. b. Check  propeller  shafts  and  U- joints for loose or broken bolts and nuts. b.  Mounting   bolts   and nuts    are    loose    or missing. 61 Monthly Air System Check  all  air  lines,  fittings,  and valves for looseness or damage. Any  air  lines,  fittings, or  valves  are  loose  or damaged. 62 Monthly Spare Wheel and Tire and Vehicle Tires a. Check  spare  wheel  and  tire  for cuts, gouges, cracks, or uneven wear. a.  Spare wheel and tire is   missing   or   dam- aged. b. Check  for  secure  mounting  of spare wheel and tire. c. Check all vehicle tires for cuts, gouges, cracks, or uneven wear. c.   Any  tire  is  missing or damaged. 63 Monthly Radiator Remove    dirt    and    debris    from cooling fins. 64 Monthly Air Condi- tioner Check  air  conditioner  operation. Operate  for  at  least  five  minutes to help prevent drying and crack- ing   of   tubing   seals   and   reduce refrigerant leaks in the system.