TM 10-3930-669-20 (3) Remove contact plate (5) from steering wheel hub (2). (4) Disconnect   wire   connector   (6)   from contact plate (5). 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 all metal parts with drycleaning solvent. (2) Clean horn button with wiping cloths and detergent. (3) Inspect horn button for cracks or damage. (4) Replace damaged parts or notify supervisor. c.   Installation. (1) Connect wire connector (6) to contact plate (5). (2) Install contact plate (5) in steering wheel hub (2). 7-103