TM    9-2330-238-14 Table   2-1.   Operator/Crew Preventive Maintenance Checks    and  Services (PMCS) (Con’t). INTERVAL ITEM   TO   BE  INSPECTED ITEM PROCEDURE: Check   for  and  have   repaired,    filled,   or EQUIPMENT IS   NOT   READY/ NO. B D A adjusted    as  needed. AVAILABLE IF 5 AIR   FILTER l Remove    pipe   plug   and   drain   filters.    Replace plug. 6 AIR   RESERVOIR l a.    Open   draincock and   drain   condensation. Close draincock. l b.    Check   to  see  that  air  connections at  air  reservoir are  secure. 7 SPRINGS l l Inspect    springs   for  abnormal sag,   broken   or  shifted leaves, loose or    missing rebound clips, pins, U-bolts, safety   nuts,   or  bolts. 8 HEATER    FUEL   SYSTEM l a.    Check   water   fuel   level. l b.    Inspect for   leaks in   fuel    line   and    around fuel pump. 9 GENERAL Operations l Be  alert  for  any  unusual    noises    or  abnormal condi- tions   that  might   indicate    a  shifting   of  the  load   or  de- fective    performance of  the  semitrailer. 10 BRAKES l a.    Apply    brakes    several    times,    Check   for   unusual conditions. Note any unsatisfactory perform- ance   (grabbing, pulling, or  slow   brakes). l l b.    At    halts and after operations, carefully feel brakedrums and    hubs    for   excessive heat.    An overheated brakedrum or hub indicates an improperly adjusted, defective, or   dry    wheel bearing    or  a  dragging brake. 11 TRACKING l Pull   semitrailer straight ahead and   check for   any side   pull,   wander,    or  shimmy. 12 OPERATING DEFICIENCIES l a.    Check counterbalance assembly for   wear   dur- ing  each   operation. l b. Replace wire   rope   when   three   or  more   strands are  broken. 2-8