TM 10-3930-669-34 b. Cleaning/lnspection. • 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 in dry-cleaning solvent.  Dry thoroughly. (2) Check tappets for excessive wear (contacting face must be convex) and oil hole not obstructed. (3) Inspect camshaft for cracks and scores using the magnetic particle method.  Replace if defective. (4) Measure camshaft bearing journal outside diameter.  Record journal diameter. (5) Measure inside diameter of bearing.  Subtract journal diameter from its bearing inside diameter.  Replace bearing if difference (clearance) is more than 0.0079 inch (0.20mm). 3-87