TM 9-2320-302-10 0012 00-8 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 14 Before Service Brakes With  transmission  in    D  (Drive), release  parking  brake  and  apply service brakes. Vehicle should not move. Vehicle moves with service brakes ap- plied. 15 Before Trailer Brakes NOTE Perform this check with trailer after tractor/trailer are coupled. a. Listen  for  air  leaks  at  interve- hicular connecting hoses, relay valve, and air reservoirs. a.  Any    air    leaks    are present. b. Apply   trailer   brakes   only   and attempt   to   move   tractor/trailer combination. b.  Brakes   fail   to   hold tractor/trailer com- bination  from  mov- ing. 16 During Instru- ment Panel/CWS Displays a. Monitor all gages and indicator and  warning  lights.  Check  that engine   coolant   and   transmis- sion  oil  temperature  gages  reg- ister within normal range (green band). a.  Any red warning light stays on. b. Monitor     indicator     lights     on driver’s   display   unit   and   side sensor   display.   If   system   fail light illuminates, continue mis- sion  and  turn  CWS  off.  Notify supervisor. 17 During Brakes a. Check    brakes    for    pulling    or grabbing. a.  Brakes pull or grab. b. Check  that  brake  pedal  is  firm and   does   not   fully   depress   to floor. b.  Brake pedal is spongy or de- presses fully to floor.