TM 10-3930-669-20 8-2.  TRANSMISSION OIL AND FILTER REPLACEMENT (CONT). WARNING Transmission oil is flammable. Ensure engine is cool to prevent fire. Injury   or   death   to   personnel   could result. (4) Position  wiping  rags  under  filter  (4)  to  catch excess transmission oil. (5) Using wiping rags, clean area around filter. CAUTION Area around filter must be very clean. Any contaminants entering filter adapter will damage equipment. (6) Remove  filter  (4)  and  preformed  packing  (5) from transmission oil filter adapter (6).  Discard filter and preformed packing. b. Cleaning/lnspection. (1) Inspect drain plug for stripped threads and damage. (2) Replace damaged parts or notify supervisor. c. Installation. (1) Coat preformed packing (5) with a light coat of clean transmission oil (LO 10-3930-669-12). (2) Install filter (4) with preformed packing (5) on transmission oil filter adapter (6).  Tighten filter one-half to three- fourths turn after preformed packing contacts transmission. (3) Remove wiping rags from under filter (4). 8-4