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 TM 55-1905-219-14-6
3-164.1. CYLINDER HEAD - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION AND REPAIR (Cont)
c. Apply 80-100 psi
(522-689 kPa) air
pressure to the water
jacket. Immerse the
cylinder head in a
tank of water, pre-
viously heated to
180-200 (82-93 )
F
C
for about twenty
minutes to thoroughly
heat the head. Observe
the water in the tank
for bubbles which
indicate a leak or
crack. Check for
leaks at the tope and
bottom of the injector
tubes, oil gallery,
exhaust ports, fuel
manifolds, and at the
top and bottom of
the cylinder head.
d. Relieve air pressure
and remove the cylin-
der head from the water
tank. Remove the
plates, gaskets, and
injectors, and dry the
head with compressed
air.
e. If the pressure check
reveals any cracks,
install a new cylinder
head.
3-2732
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