Inspection Procedure (90-120-Day Inspection)

TM 5-4220-201-12

4-2. Inspection Procedure (90-120-Day Inspection)

To perform these inspections, remove the flotation cells (fig. 1-5) from

the containers, and visually inspect the containers for loose stitching,

oil, and grease spots. Perform a leakage test and visual inspection of

the flotation cells as follows: recording room temperature at the start of

the test.

WARNING

Do not inflate flotation cells rapidly.

a. Attach the mechanical inflation system to the mouth inflation

valve (fig. 2-7). Be sure the CO2 valve discharge lever (fig. 4-1) is in

operating position. Install an empty CO2 cylinder in the inflator to

prevent leakage.

b. Inflate the cells, through the mouth inflation valve, with oil and

moisture-free regulated low pressure air to a pressure of 2 psi, and let

stand for a minimum of 15 minutes. After this 15-minute period

readjust the pressure to 2 psi if necessary. When the flotation cells are

inflated, apply pressure to each side of the cell so as to place the

rubber under a slight strain. Inspect the cell to make sure the rubber is

firmly molded and has not begun to split or separate. Condemn cells

showing signs of splitting or separating.

4-2