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TM 10-4320-351-14
6.3.20 Disassemble Cylinder Head. (Refer to figure 6-21.)
This task consists of:
a. Removal
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Key, Socket Head Screw, 8 mm
None
(Appendix B, Section III, Item 3)
Key, Socket Head Screw, 3 mm
(Appendix B, Section III, Item 3)
Valve Spring Compressor
Equipment Condition:
(Appendix B, Section III, Item 3)
Cylinder head removed (See para. 6.3.11)
Pliers, Needle Nose
(Appendix B, Section III, Item 3)
NOTE
For clarity, only the exhaust valve assembly is shown exploded in figure 6-21. The
following procedure also applies to the intake rocker arm assembly and to either
cylinder head.
a.
Remove exhaust rocker arm journal (1), and washer (2) from cylinder head (3). Discard washer (2). Remove
rocker arm (4) from cylinder head.
b.
Inspect and clean rocker arm lubrication hole (5).
c.
Using a valve spring compressor, push down on upper exhaust valve spring retainer (6) and spring (7). Remove
valve cotter (8).
d.
Remove upper exhaust valve spring retainer (6), spring (7), lower valve spring retainer (9), valve guide seal (10),
and ring (11).
e.
Remove exhaust valve (12) and valve guide (13) from cylinder head. Inspect for damage.
f.
Remove socket head screw (14) from decompression arm (15). Remove decompression arm (15), O-ring (16),
washer (17) and spring (18). Discard O-ring (16). Thoroughly clean decompression arm cavity (19).
6-34
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