If leak test fixture balloon (6) continues to decrease in size, perform the following checks:
(1) Refer to paragraph 3-10.3.4 and examine the preformed packing in the center section around the
absorbent canister well for damage or a loose fit. Replace damaged or loose fitting preformed packing.
(2) Refer to paragraph 3-10.3.4 and examine the preformed packing in the center section connections for the
regulator tube and the bypass tube for damage. Replace damaged preformed packing.
A common source of leaks is a poor seal around the diaphragm clamp.
(3) Refer to paragraph 3-10.3.15 and examine the diaphragm assembly for cracks and a tight seal around the
diaphragm clamp. Reseat the diaphragm and tighten the diaphragm clamp if the seal is loose. Replace
the diaphragm if damaged.
(4) Refer to paragraph 3-10.3.15 and examine the relief valve for damaged preformed packing and clean
seating surfaces. Clean the seating surfaces. Replace damaged preformed packing.
Repeat steps k. through m. to retest the rebreather system.
Remove leak test fixture balloon (6) from inhalation hose (7) and leak test fixture plug (8) from exhalation hose
Turn pressure test knob (1) 1/4 turn in either direction and pull it out of hole (2) in the back of the rebreather
Install the red plug in exhalation hose (5).
Perform steps a.(3) through a.(5), paragraph 3-10.3.2, and remove the coolant canister.
Install the red plug in coolant canister hose (4).
Perform steps a.(3) through a.(5), paragraph 3-10.3.1, and remove the oxygen bottle used for testing.
Perform steps b.(1) through b.(6), paragraph 3-10.3.1, to install a fully charged oxygen bottle.
Install top cover (3).
Refer to paragraph 3-11.2.3 and store the rebreather system.