TM 10-3930-659-34 4-13. TAPPETS REPLACEMENT (Con’t). b. CLEANING AND INSPECTIONI WARNING •  Dry  cleaning  solvent,  P-D-680,  is  toxic  and  flammable.    Always  wear  protective goggles and gloves, and use only in a well-ventilated area.  Avoid contact with skin, eyes, and clothes, and DO NOT breathe vapors.  DO NOT use near open flame or excessive heat.  The solvent's flash point is 100°F-138°F (38°C-59°C). If you become dizzy while using cleaning solvent, immediately get fresh air and medical  help.    If  solvent  contacts  eyes,  immediately  wash  your  eyes  and  get medical aid. •     Compressed   air   used   for   cleaning   or   drying   purposes,   or   for   clearing restrictions,  should  never  exceed  30  psi  (207  kPa).    Wear  protective  clothing (goggles/shield, gloves, etc.) and use caution to avoid injury to personnel. 1. Clean  tappets  with  dry  cleaning  solvent  and  dry with compressed air. 2. Using  outside  caliper  micrometer,  measure  out- side  diameter  of  tappets  (2).    Outside  diameter must  be  1.245-1.246  in.    (3.162-3.165  cm).    If measurement is less than specified, replace tap pet. c INSTALLATION Apply a thin coat of lubricating oil to 12 tappets (2) and install tappets in engine block (1). FOLLOW-ON TASKS: • Install cylinder head assembly (see paragraph 4-5). TA708100 4-61