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 TM 55-1905-221-14-2
5-15.
CYLINDER HEAD (Continued).
LOCATION/ITEM
ACTION
REMARKS
CLEANING (Cont)
d.
If the water jackets are
heavily scaled, proceed as
follows:
1.
Agitate the head in a bath
of inhibited commercial
pickling acid.
2.
Allow the head to remain
in the acid bath until
the bubbling action stops
(approximately 30 minutes).
3.
Lift the head, drain it,
and reimmerse it in the
same acid solution for
10 minutes.
4.
Repeat step 3. until all
scale is removed.
5.
Rinse the head in clear
hot water to remove the
acid solution.
6.
Neutralize the acid that
may cling to the casting
by immersing the head in
an alkaline bath.
7.
Wash the head in clean
water or steam clean it.
e.
Make certain that all water
passages and oil galleries
have been thoroughly cleaned.
5-351
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