TM 10-3930-669-20 (8) Push lower seat frame assembly (14) to the rear position (TM 10-3930-669-10). (9) Loosen two screws (15) and remove lower seat frame assembly (14) from two slide rails (12 and 13). (10) Remove two screws (15), two slide rails (12 and 13), and two brackets (16) from cab mount (17). b.  Cleaning/Inspection. WARNING • Drycleaning solvent (P-D-680) is TOXIC and flammable.  Wear protective goggles and gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and clothes; and do not breathe vapors.  Keep away from heat or flame.  Never smoke when using solvent; the flashpoint for type I drycleaning solvent is 100°F (38°C) and for type II is 138°F (50°C).  Failure to do so may result in injury or death to personnel. • If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical help.  If solvent contacts skin or clothes, flush with cold water.  If solvent contacts eyes, immediately flush eyes with water and get immediate medical attention. (1) Clean sealing compound from four screws with drycleaning solvent.  Allow to air dry. 15-55