ARMY TM 9-2805-256-14 AIR  FORCE  TO  38G2-102-2 NAVY NAVFAC P-8-611-14E 5-14. b. Cylinder Head (cont). Repair. (figure 5-12) WARNING Dry  cleaning  solvent  PD-680  used  to  clean  parts  is  potentially  dangerous  to  personnel and property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point of solvent is 100°F -138°F (38°C-60°C). (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) 5-28 Clean  cylinder  head  assembly  with  dry  cleaning  solvent  and  dry  thoroughly. Remove clip (1) and remove rocker shaft (2). Remove two rocker arms (3) and take note of which rocker is for intake and exhaust. Remove  two  push  rod  packing  screws  (4)  and  preformed  packing  (5). Use  spring  compressor  and  remove  two  retainer  halves  (6),  rotocap  (7)  exhaust  valve  (8)  and  spring  (9). Repeat step (5) for intake valve. Inspect all components of cylinder head assembly. Replace any component of cylinder head assembly which shows signs of excessive wear or other damaged. Refer to Table 5-2 for wear limits. Re-seat valves in cylinder head to ensure proper seal. Install  exhaust  valve  (8),  spring  (9),  rotocap  (7)  and  two  retainer  halves  (6). Use  spring  compressor  and  install  two  retainer  halves  (6). Repeat steps 9 and 10 for intake valve. Install  two  preformed  packings  (5)  and  push  rod  packing  screws  (4). Install both rocker arms (3), rocker shaft (2) and clip (1). Loosen two lock nuts (10) and unscrew adjusters (11) part way.