TM 10-3930-669-34 NOTE Perform Step (5) only if fasteners are damaged. (5) Remove five wheel fasteners (6) from hub (1). c. Cleaning/Inspection. WARNING • 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. • 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 parts in dry-cleaning solvent.  Allow to air dry. (2) Inspect the bearings and bearing cups for scratches, cracks, glazing, rust pitting, flat spots, and other wear. (3) Clean old grease out of center of wheel hub. (4) Replace all damaged parts or notify supervisor. d. Assembly. NOTE Perform Step (1) if fasteners were removed. (1) Install five wheel fasteners (6) in hub (1). 12-25