TM 10-3930-659-34 4-12. ENGINE ROCKER ARM ASSEMBLY AND PUSHRODS MAINTENANCE (Con’t). CAUTION Note position of engine rocker arms and shaft supports to aid during installation. Engine rocker arms  and  shaft  supports  must  be  installed  in  the  same  location  as removed. 3. Remove 12 engine rocker arms (13), six shaft supports (10), five springs (8), and two washers (7) from shaft (6). 4. Remove 12 adjusting screws (9) from engine rocker arms (13). c. CLEANING AND INSPECTION I 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 parts with dry cleaning solvent and dry with compressed air. 2. Inspect parts for cracks, bends, and breaks.  Replace defective parts. TA708095 4-56