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Figure 2-4. Relief Valve Test | Up
TM-5-4220-225-14 Firefighting Truck 100 Ft Aerial Ladder 1000 GPM Manual | Next
Figure 2-5. Drysuit Leak Test |
TM 5-4220-225-14
d. Drysuit Leak Test (figure 2-5).
NOTE
This is a quarterly planned maintenance function, premission function or as determined
by operating conditions and the policy of the dive supervisor.
(1)
Insert wrist plugs into each cuff from the inside of the sleeve and secure with wrist snappers.
(2)
Ensure the zipper (1)
is fully shut.
NOTE
Use only MK12 helmet whose P setting is known to be correct.
(3)
Place the helmet (2)to be used on the frontviewport upon a rubber mat.
(4)
Attach the drysuit (3)with lower breech ring (4) to the helmet assembly.
*(5)
Remove the air supply adapter cap and gasket and install the air whip (5).
*(6)
Connect an air supply to the air supply whip (5).
(7)
Open helmet exhaust valve (6)fully.
(8)
Open the helmet supply valve (7)approximately one-fourth turn.
(9)
Adjust the helmet exhaust valve (6)until the suit (3)becomes rigid without ballooning.
(10)
Apply a mild soap solution with a brush to the entire suit, paying particular attention to the seams and
high wear areas.
(11)
Mark any leak areas for repair.
(12)
Rinse the suit thoroughly with freshwater to remove all soap solution.
(13)
Shut the helmet air supply valve (7).
(14)
Open the suit zipper (1).
(15)
Detach the drysuit (3)from the helmet assembly (2).
(16)
Repair as required.
(17)
Prepare the next drysuit for leak testing. Repeat steps a, b, d, and g through p for each successive
drysuit.
*(18)
Secure supply air.
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