3-10. REBREATHER SYSTEM MAINTENANCE INSTRUCTIONS . (CONT)
Insert pressure test knob (1) in hole (2) in the back of the rebreather system.
Push and turn pressure test knob (1) 1/4 turn in either direction to lock it in position.
Lay the rebreather system on a flat surface.
Release the latches on the bottom of the rebreather system and remove top cover (3).
If a fully charged oxygen bottle is not installed, perform steps b.(1) through b.(6), paragraph 3-10.3.1, and install
a fully charged oxygen bottle.
Remove the red plug from coolant canister hQse (4).
The coolant canister does not have to be frozen to perform the test.
Perform steps b.(1) through b.(3), paragraph 3-10.3.2, and install a coolant canister.
Remove the red plug from exhalation hose (5).
Connect leak fixture balloon (6) to white inhalation hose (7).
Connect leak test fixture plug (8) to exhalation hose (5).
Holding inhalation hose (7) in the upright position, open oxygen bottle valve (9) to inflate leak test fixture balloon
If the leak test fixture balloon over-inflates, vent some air through the vent valve on the leak test fixture
Close oxygen bottle valve (9) when leak test fixture balloon (6) lays at about a 450 angle to inhalation hose (7).
Observe leak test fixture balloon (6) for two minutes. If it does not decrease in size, continue to step r.
If leak test fixture balloon (6) decreases in size, perform the following checks:
(1) Check all hose connections and fittings for a tight connection. Tighten any loose hose connections or
referto paragraph 3-10.3.9 and replace any damaged hoses or connectors.
(2) Perform plumbing leak test, paragraph 3-10.4.1.
Repeat steps k. through m.