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 TM 55-1905-220-14-5
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 substances, the heat
exchanger must be cleaned as
soon as pos sible after
removing it from service.
Use a solvent
consisting 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 (29) 30 to 60 seconds.
(expansion tank) when
foaming and bubbling stops.
c. Flush thoroughly with clean hot
water under pressure.
3-1334
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