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 TM 55-1905-220-14-11
5-79. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS. (Continued).
LOCATION
ITEM
ACTION
REMARKS
CLEANING (Cont)
d. If the cup plugs in the water jackets were removed,
install new plugs as follows:
(1)
Clean cup plug holes and apply Permatex No. 1
sealant or equivalent, to outer plug diameter.
(2)
Drive plugs in place with handle and adapter.
PRESSURE TEST
3.
After the cylinder block has been cleaned, it must be
pressure tested for cracks or leaks by either one of
two methods:
(a)
This method may be used when a large water tank
is available and the cylinder block is completely
stripped of all parts.
(1) Seal the water inlet and outlet holes airtight.
This can be done by using steel plates and
suitable rubber gaskets held in place by bolts.
Drill and tap one coverplate to provide a
connection for an air line.
(2) Immerse the block for twenty minutes in a tank
of water heated to 180200 (82.2-93.3C.).
-
F
(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.
5-1075
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