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 TM 55-1905-223-24-5
(1) Put the element (3) into a container of an approved cleaning solvent. Keep the element in the solution
for several minutes. Flush the solution around and through the tubes in the element.
(2) Flush the tubes in the element with a solution of alkaline. After cleaning, flush several times with hot
water.
WARNING
The fumes from the cleaning solution are dangerous. Use the solution in open air or in a room that has proper
ventilation. Wear safety glasses and gloves.
(3) Put the element into a container of solution made up of the following: One part muriatic acid, nine
parts water, one pound (0.5 kg) oxalic acid, and 0.01 gallon (0.038 L) of pyridene added to each 5 gallons (18.9
L) of muriatic acid.
(4) Remove the element when there are no foam or bubbles in the solution. The foam and bubbles
normally stop in 30 to 60 seconds.
(5) Put the element into a container that has a 5 percent solution of sodium carbonate. Remove the
element when there are no bubbles coming from the solution.
(6)
Flush the element with clean, warm water.
(7)
Visually inspect the element for damage. Replace if damaged.
c.
Clean the housing (12), support (5); and cover (14) with cleaning solvent.
d.
Visually inspect the following:
(1)
Check the cooler housing (12, FIGURE 3-4) for cracks, damage and corrosion.
(2)
Check the support (5) and cover (14) for cracks, damage, and corrosion.
(3)
Replace housing (12), support (5), or cover (15) if damaged.
e.
Using the tube bundle tester (FIGURE 3-5), test the cooler element for leaks as follows:
(1)
Install the end plate to each end of element.
(2) Position the sliding plate of the fixture so that the fixture will fit over the element and end plates
(3) Position the element into the fixture. Position the fixture so that the air connection fitting goes through
the notch in the fixture plate. Install locking clips into the bars of the fixture.
3-13
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