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Mustang Survival MSV971 Life Preserver and Survival Vest
Description and Maintenance Instructions
9 June 2004, Rev: 1.0
e. Perform the CO
2
inflation device test as per section 5.8.
f. Perform the CO
2
cylinder weight test as per section 5.9.
g. Reassemble the LP/SV unit and perform the visual inspections as per section 5.3 above.
5.5 INFLATION MANIFOLD VALVE TEST
5.5.1
5.6.1
5.7.1
5.7.2
Test the core of the inflation manifold valve:
a. Remove the cap nut and the inflation device.
b. Ensure that the core of the valve is properly seated, and then inflate the cell to 2.0 psi
gauge or until the cell feels hard to the touch.
c. Place a small amount of soap & water solution over the valve opening. Bubbles in the
solution indicate leakage; replace the core. Alternatively, submerge the cell in fresh
clean cool water and look for bubbles.
5.6 ORAL INFLATOR VALVE TEST
Test both oral inflator valves for leaks:
a. With the opposite chamber evacuated completely, inflate the appropriate inflatable cell
chamber to a gauge pressure of 2.0 psi or until the cell feels hard to the touch.
b. Place a small amount of soap & water solution on the stem opening. Use care to prevent
the entry of water into the valve. A bubbling of the soap solution will indicate leakage.
c. To check the oral inflation valve for blockage; lower the pressure in the inflatable cell
chamber to 0.5 - 1.0 psig. Open the air passage by pushing the valve inwards and then
blow by mouth through the oral inflator valve. The effort required to inflate the chamber
should not be excessive and the valve must close tightly when the oral inflation is halted.
d. Consider the valve non-serviceable if it fails either test and replace it.
5.7 INFLATABLE CELL TEST
The inflatable cell consists of two independent inflatable chambers, both of which must be
tested. Prior to any inflatable cell chamber test, it is imperative that the opposite chamber is
first evacuated of all residual gas or air. The rear chamber can be accessed through the rear
oral inflator assembly and the CO
2
inflation valve. The front chamber can be accessed through
the front oral inflator assembly only.
To test each chamber of the inflatable cell:
a. Remove the CO
2
cylinder to prevent accidental double inflation.
b. Slowly inflate one of the cell chambers, through the oral inflation valve, using an oil free
pressurized airline. Inflate to a gauge pressure of 2.0 psi (140 cm/55 inches of water).
NOTE: If the cell being tested is a new item from stock, inflate the rear chamber of the
cell through the CO
2
inflation device, rather than the oral inflation valve, to
ensure free airflow through the inflation device and manifold.
c. Allow ten minutes for pressure stabilization, then (if necessary) adjust the pressure back
to 2.0 psi gauge.
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