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 TM 55-1905-221-14-4
6-29. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION/ITEM
ACTION
REMARKS
PRESSURE TEST (Cont)
WARNING
Wear protective eye goggles when using compressed air.
b. This method may be used when
a large tank is unavailable,
or when it is desired to
check the block for cracks
without removing the engine
from the equipment which it
powers. However, it is
necessary to remove the
cylinder heads, blower, oil
cooler, air box covers and
oil pan.
(1) Attach sealing plates and
gaskets as in method "a".
Before attaching the last
sealing plate, fill the
water jacket with a mix-
ture of water and one
gallon of antifreeze.
The antifreeze will
penetrate small cracks
and its color will aid
in detecting their
presence.
(2) Install the remaining
sealing plate and
tighten it securely.
(3) Apply 40 psi (275.8 kPa)
air pressure to the water
jacket and maintain this
pressure for at least two
hours to give the water
and anti freeze mixture
ample time to work its
way through any cracks
which may exist.
6-524
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