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 TM 55-1905-221-14-4
6-29. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION/ITEM
ACTION
REMARKS
PRESSURE TEST (Cont)
(1) Seal off the water
inlet and outlet holes
air tight. This can
be done by using steel
plates and suitable
rubber gaskets held in
place by bolts. Drill
and tap one cover
plate to provide a
connection for an air
line.
(2) Immerse the block for
twenty minutes in a
tank of water heated
to 180200 (82.2
-
F
-
93.3 ).
C
(3) Apply 40 psi (275.8
kPa) air pressure to
the water jacket and
observe the water in
the tank for bubbles
which indicate the
presence of cracks
or leaks in the block.
A cracked cylinder
block must be replaced
by a new block.
(4) After the pressure
test is completed,
remove the block from
the water tank. Then
remove the plates and
gaskets and dry the
block with compressed
air.
6-523
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