TM 9-2320-302-10 0012 00-9 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 18 During Steering Check for smooth steering without pulling   to   one   side   or   excessive play  [more  than  2½  in.  (6.4  cm)] in steering wheel. Steering is erratic, pulls,  or  has  excessive play. 19 During Power Train Check  for  unusual  noise  or  vibra- tion    from    engine,    transmission, drive shafts, axles, and wheels. Unusual noise or vibra- tion is present. 20 During Air Condi- tioner NOTE Perform the following inspection only if air condi- tioner is required due to climatic conditions. Turn   air   conditioner   on   and   set blower to maximum cooling speed settings.    Wait    five    minutes    to allow    temperature    to    stabilize. Check  outlet  ducts  for  cool  air.  If air is not cooler than ambient tem- perature, notify supervisor. 21 After Overall Leakage Be alert for evidence of fluid leak- age. Class III oil, coolant, or fuel leaks are evident. NOTE If  leakage  is  detected,  further  investigation  is  required  to  deter- mine location and cause of leak. FRONT AND LEFT SIDE 22 After Overall View a. Check under truck for evidence of   fluid   leakage   such   as   oil, coolant or fuel. a.  Class  III  oil,  coolant or fuel  leaks are evi- dent. NOTE If  leakage  is  detected,  further  investigation  is  required  to  deter- mine location and cause of leak. b. Check front gladhands for dam- age.  Ensure  that  gladhand  vent holes  are  not  plugged.  Ensure that dummy couplings are installed.