TM 10-3930-659-10 3-12.  CHECK AND CLEAN CAB AIR FILTERS. WARNING If NBC exposure Is suspected, all air filter media should be handled by   personnel   wearing   protective   equipment.      Consult   your   NBC Officer     or     NBC     NCO     for     appropriate     handling     or     disposal procedures. a.  Check and Clean Cab Recirculating Air Filter. (1) Loosen two screws (1) securing filter screen (2) and air filter (3) to rear of cab behind seat.  Remove air filter from filter screen.  Check air filter for damage or dirt. (2) Wash air filter (3) in warm, soapy (Item 2, Appendix D) water.  Flush with clean water and let air dry. (3) Install air filter (3) in filter screen (2) and secure to rear of cab with two screws (1). TA704530 3-19