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
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