TM 9-2320-303-10 Table 2-1.  Preventive Maintenance Checks and Services (PMCS) for M915A4 (Con't). Location Item To Check/ Not Fully Mission Item No. Interval Service Procedure Capable If: 18 During Steering Check for smooth steering  without  pulling  to one side or excessive play  [more  than  2  1/2  in. (6.4 cm)] in steering wheel. Steering  is  erratic,  pulls,  and has excessive play. 19 During Power Train Check   for   unusual   noise or   vibration   from   engine, transmission, drive shafts, axles, and wheels. Unusual  noise  or  vibration  is present. 20 During Air Condi- NOTE tioner Perform   the   following   inspection   only   if   air conditioner 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 temperature, notify supervisor. 21 During Overall Leakage Be   alert   for   evidence   of fluid leakage. Class III oil, coolant, or hydraulic    leaks    or    Class    II fuel leaks are evident FRONT AND LEFT SIDE 22 After Overall View a.   Check   under   truck   for evidence of fluid leakage    such    as    oil, coolant, fuel, or hydraulic fluid. a.   Class   III   oil,   coolant,   or hydraulic  leaks  or  Class  II fuel leaks are evident. 2-36