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TM 10-3930-638-24&P
4-2. ENGINE MAINTENANCE (cont)
b. Cylinder Head and Valves (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
1
a. Valve spring (3)
Use valve spring compressor tool
Cylinder head
Compress
b. Two valve keepers (1)
(8), top
Remove and discard
Release
Carefully release pressure on valve
c. Valve spring (3)
spring compressor tool
d. Spring retainer (2)
Remove
e. Valve spring (3)
Remove
f. Spring seat (4)
Remove
g. Valve stem seal (5)
Remove
NOTE
Identify (number) valves (6 and 7) and respective bores for
reference during installation.
2
Cylinder head
a. Exhaust valve (6)
Remove
(8), bottom
b. Intake valve (7)
Remove
CLEANING
CAUTION
In following step be careful not to scratch valve stems.
3
Four exhaust valves (6)
Use fine power driven wire brush
Clean
and intake valves (7)
WARNING
Dry cleaning solvent (P-D-680), used to clean parts is toxic and
flammable. Wear protective goggles and gloves and use only in a
well ventilated area. Avoid contact with skin, eyes, and clothes
and don't breathe vapors. Do not use near open flame or exces-
sive heat and don't smoke when using it. Failure to do so could
cause serious injury. If you become dizzy while using cleaning
solvent, get fresh air immediately, and get medical attention. If
contact with skin or clothes is made, flush with large amounts of
water. If contact with eyes is made, wash eyes with water immedi-
ately, and obtain medical aid immediately.
4-10

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