ARMY TM 9-2805-257-14
AIR FORCE TO 38G2-103-2
NAVY NAVFAC P-8-612-14E
Cylinder Head (cont).
Repair. (figure 5-12)
The repair procedures are the same for both cylinder heads.
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).
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).
Using a valve spring compressor, remove two retainer halves (6), rotocap (7) intake valve (8) and
Repeat step (5) for exhaust 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 intake valve (8), spring (9), and rotorcap (7).
Use valve spring compressor and install two retaining halves (6).
Repeat steps (9) and (10) for exhaust 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.