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 TM 55-1905-219-14-5
3-76. EXPANSION TANK AND WATER CONNECTIONS - MAINTENANCE INSTRUCTIONS (Cont)
LOCATION
ITEM
ACTION
REMARKS
REMOVAL (Cont)
8.
Expansion
a. Remove capscrews (48)
tank
and lockwashers (49).
b. Remove blank cover
(50).
c. Remove gasket (51)
Discard.
from expansion tank
(29) (heat exchanger).
CLEANING
9.
Expansion
a. Immerse the heat ex-
To prevent dry-
tank
changer (29) (expan
ing and harden-
sion tank) in a scale
ing of accumula-
solution.
ted foreign sub-
stances, the
heat exchanger
must be cleaned
as soon as pos-
sible after re-
moving it from
service. Use a
solvent consist-
ing of 1/3
muriatic acid
and 2/3 water
to which 1/2 lb
(0.226 kg) of
oxalic acid has
been added to
each 2-1/2 gals.
(9.46 1) of
solution.
b. Remove heat exchanger
30 to 60
(29) (expansion tank)
seconds.
when foaming and bub-
bling stops.
c. Flush thoroughly with
clean hot water under
pressure.
3-1352
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