TM  10-3930-643-34 GENERAL  SUPPORT  TRANSMISSION  MAINTENANCE. 15-5. Second and Third Gear Assembly. (Sheet 8 of 17) CLEANING/INSPECTION l TOXIC/FLAMMABLE 36. 37. 38. Dry  cleaning  solvent  P-D-680,  used for cleaning parts, is toxic and flammable. Use  only  in  well ventilated areas. Wear protective goggles and gloves. Do not smoke or allow open flames or sparks in areas where cleaning solvent is used or stored. Avoid contact with eyes, skin or clothing. If contact with eyes is made, flush with cold water and seek medical attention  immediately. If contact with skin or clothing is made, flush with cold water. If   y ou become  dizzy  while  using  cleaning solvent, get fresh air immediately. l COMPRESSED  AIR  HAZARD Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding and personal protective equipment  (goggles/shield,  gloves, etc.). Clean all parts with cleaning solvent P-D-680. Dry thoroughly with compressed air. Refer to paragraph 2-8. Inspect shaft (39) splines for wear or damage. Replace, if necessary. Inspect gears (3, 4, 7 and 20), cylinder (38) and plates (12 thru 14 and 25 thru 27) for wear, cracks or missing teeth. Replace,   if necessary. Go to sheet 9 15-63