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 TM 55-1905-219-14-11
5-79. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
PRESSURE TEST(Cont)
Wear protective eye goggles when using compressed air.
(4) After pressure test is completed,
remove the block from the water
tank. Remove plates and gaskets
and dry with 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 water
jacket with a mixture of water and
one gal 1 on of anti freeze. The
antifreeze will penetrate small
cracks and its color will aid in
detecting their presence.
(2) Install the remaining sealing
plate and tighten 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 antifreeze mixture
ample time to work its way thru
any cracks which may exist.
(4) At the end of the test period,
examine the cylinder bores, air
box, oil passages, crankcase
and exterior of the block for
presence of the water and anti-
freeze mixture which will
indicate the presence of cracks.
5-1074
TM 55-1905-219-14-11
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