TM 10-8415-208-123-9. EMERGENCYBREATHINGAPPARATUS(EBA)MAINTENANCEINSTRUCTIONS. (CONT)g.Connect EBA breathing tube (10) to EBA regulator outlet (11).NOTEIt is not necessary to remove the warning light electrical wire or the face piece vent tube from thebreathing tube.h.Disconnect face piece (12) from breathing tube (10) and lay face piece (12) to the side.NOTEThe breathing tube should be kept as straight as possible to ensure the most accurate gauge readings.i.Connect breathing tube (10) directly to inlet connection (6).WARNINGHigh pressure air hazard. Always attach the regulator to its appropriate air supply source. Never attach alow pressure air line regulator to a high pressure air supply without an in line regulator to step the pressuredown. Failure to follow this warning could result in severe personnel injury or death due to over-pressurization and explosion.NOTEThe air line supply pressure to the EBA should be 85-90 PSIG.j.Attach remote air supply line (13) to tether line connection (14).k.Ensure flow valve (4) is closed by turning it clockwise.I.Ensure regulator valve (15) is closed.m.Turn on the remote air supply.n.Completely open regulator valve (15).NOTEThe static pressure is read from the pressure gauge when the flow valve is closed.o.Read pressure gauge (2).p.Open briefly and close flow valve (4) a number of times until a repeatable static pressure is read frompressure gauge (2). The static pressure should be between +1.1 and + 1.5 inches of water when flow valve(4) is closed.q.If the static pressure is not between +1.1 and +1.5 inches of water or if a constant reading cannot beachieved, depressurize the system and perform the following checks:(1) Remove the regulator cover and check that the diaphragm spring is properly seated in the center of thediaphragm cup. Refer to paragraph 3-9.2.7.(2) Check the diaphragm spring for distortion. Replace damaged spring.3-68
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