TM 9-6115-664-13&P
5-9. CYLINDER HEAD MAINTENANCE
5. Compress spring (10) by pressing down on spring
plate (9). Remove valve cotter (8) and slowly
release spring plate to remove pressure. Repeat
with second valve spring.
6. Remove spring plates (9), springs (10), and valve
seals (11) from valve guides (12, 13). Do not
remove valve guides and washers (14) from cylinder
head (7) at this time.
7. Disconnect engine exhaust tube (18) from flanged
air pipe (20) by loosening hose clamp (19). Remove
flanged pipe from manifold studs (22) by removing
nuts (21). Remove gasket (45).
8. Remove exhaust manifold (23) from cylinder head
(7) by removing two each screws (24, 25) and
washers (26, 27). Remove and discard gasket (28).
9. Remove cap nuts (29). Loosen four nuts (30) in a
criss-cross pattern and remove nuts and washers
(31). Remove push rods (38, 39).
10. Carefully remove cylinder head (7) from head
mounting studs. Place on a suitable work surface
for further maintenance.
11. Make a temporary mark on tappet guide (41), push
rod tube (32), and cylinder head (7) to indicate tube
orientation. Remove push rod tube. Remove and
discard O-ring seal (33).
12. Remove gasket (34) from cylinder head (7) and
discard. Ensure all gasket material is removed from
both the cylinder head and engine block.
13. Slide inlet valve (35) and outlet valve (36) out of
valve guides.
14. Remove tappet guide (41) by removing screws (42).
Remove tappets (44). Remove and discard gasket
(43) and O-ring seal (40).
Figure 5-3. Cylinder Head
(Sheet 2 of 7)
5-25
