TM 5-3805-261-20 ORGANIZATIONAL PREVENTIVE MAINTENANCE CHECKS AND SERVICES. Legend Q - Quarterly B - Biannually S - Semiannually H - Hours A - Annually Mi - Miles ITEM TO BE INSPECTED PROCEDURE: CHECK FOR AND HAVE REPAIRED, INTERVAL FILLED OR ADJUSTED AS NEEDED.  PERFORM ITEM NO. Q S A B H MI ALL OPERATOR PMCS FIRST. 1 • 250 TIRES WARNING • Explosions of air inflated earth-moving tires have resulted from heat induced gas combustion    inside    the    tires.        The    heat generated by welding or heating rim components,  external  fire  or  excessive  use of  brakes  can  cause  gaseous  combustion. A tire explosion is much more violent than a blowout.    The  explosion  can  propel  the  tire rim   and   components   as   far   as   1500   ft   or more  from  the  machine.    Both  the  force  of the   explosion   and   the   flying   debris   may cause    injury    or    property    damage.        All personnel  should  be  aware  of  this  danger and the actions to take to minimize the risk. • Proper  air  inflation  equipment  and  training in  its  use  are  necessary  to  avoid  possible over-inflation.    A  tire  blowout  or  rim  failure can result from improper or misused equipment. Check and service.  Refer to TM 5-3805-261-10.  Proper inflation pressure is 35 psi. 4-5