5-8. CYLINDER HEAD MAINTENANCE INSTRUCTIONS - Continued
Coat new preformed packing (9) with small
amount of engine lubricating oil and install in cyl-
inder head (7), seating in groove of bore for push
rod tube (8).
P-D-680, Type III, is moderately toxic to
Install the push rod tube (8) in cylinder head (7),
the skin, eyes and respiratory tract;
pushing the tube well through the bore.
avoid prolonged exposure. Skin and
eye protection is required. Good ventila-
Carefully install the assembled cylinder head (7)
tion is required. Do not use near open
onto the cylinder head studs and seat on top of
flame or excessive heat. Flash point is
200° F (93.3' C).
Install lift bracket (6) on stud in location shown,
Clean all parts in dry cleaning solvent and dry
and secure with nut (4).
Install three flat washers (5) and nuts (4) on re-
Ensure that all carbon is cleaned off bottom of
maining cylinder head studs. Using torque
the cylinder head (7).
wrench, tighten nuts (4) to 20 - 23 ft.-lbs. (27 - 31
Seat the push rod tube (8) down on the compres-
sion release and secure with retaining spring (3),
Inspect threaded fasteners for stripped threads or
flat washers (2) and locknuts (1). Tighten nuts se-
Inspect the breather valve (13) for looseness or
Install and adjust rocker arms and push rods
other damage (missing check ball in breather).
Inspect the valve seats on bottom of cylinder
head (7) for scoring or excessive wear (Para.
Replace any part found defective during inspec-
If replacement is necessary, remove defective
stud(s) (10, 11, or 12). Install replacement stud,
Follow-on tasks include: Return compactor
If replacement is necessary, pull defective
breather valve (13) from bore in cylinder head. In-
stall replacement breather valve, seating fully to
the shoulder on the valve.
If removed, install the valves in the cylinder