TM 10-3930-669-34 b. Cleaning/lnspection. WARNING • Dry-cleaning 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 dry-cleaning 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 all metal parts with dry-cleaning solvent. (2) Inspect all parts for breaks, cracks, burrs, and sharp edges. (3) Replace all damaged parts. c. Installation. (1) Install  two  devises  (1)  in  counterweight  (2)  with two  washers  (13),  pins  (12),  and  retaining  pins (11). WARNING Counterweight  insert  weighs  146  lbs (66 kg).  Attach suitable lifting device prior   to   removal   or   installation   to prevent possible injury to personnel. (2) Using   a   lifting   device,   position   counterweight insert (9) and seal (10) in counterweight (2). (3) Attach    lifting    device    to    two    devises    (1)    in counterweight (2). 13-41