TM 10-3930-659-20 14-13.    CAB FRESH AIR FILTER AND DOOR REPLACEMENT. This Task Covers: a. Cab Fresh Air Filter Replacement b. Cab Fresh Air Filter Door Replacement Initial Setup: Materials/Parts: Tools/Test Equipment: • Adhesive (Item 1, Appendix C) •  General mechanic's tool kit (Item 44, Appendix F) • Two seals •  Compressor unit (Item 8, Appendix F) General Safety Instructions: • Compressed air used for cleaning purposes should never exceed 30 psi (207 kPa). • If NBC exposure is suspected, all air filter media must be handled by personnel wearing protective equipment. 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. CAB FRESH AIR FILTER REPLACEMENT 1. Open door (5). 2. Remove  four  wingnuts  (1),  frame  (2),  and  cab fresh air filter (3) from door (5). 3. If   damaged,   remove   seal   (4)   from   door   (5). Discard seal. WARNING Compressed air used for cleaning or drying purposes, or for clearing restrictions, should never exceed 30 psi (207 kPa).  Wear protec- tive   clothing   (goggles/shield,   gloves,   etc.) and use caution to avoid Injury to personnel. 4. Clean  cab  fresh  air  filter  (3)  using  compressed air. 5. Inspect   cab   fresh   air   filter   (3)   for   damage. Replace cab fresh air filter if damaged. 6. If removed, install new seal (4) on door (5). 7. Install  cab  fresh  air  filter  (3)  and  frame  (2)  on door (5) with four wingnuts (1). 8. Close door (5). TA706817 14-31