Aqua Lung SEA MK Troubleshooting Guide download pdf (Page 22)

SEA LV2 Technical Maintenance Manual

Upon initial receipt of the SEA MK/LV2/HESP (here after

referred to as SEA) from the OEM or storage and prior to

the initial issue of the SEA, the following procedure must be

performed.

INITIAL PRE-ISSUE PROCEDURE FOR THE

SEA MK/LV2/HESP

1. Remove the SEA from the OEM packaging

2. Inspect the SEA IAW local instructions and verify it is in

good condition.

3. Remove the Fill Port Plug and set it aside. Ensure there

is no debris in the Fill Port Adapter. Remove the Protective

Rubber Cover from the top of the SEA and set it aside.

4. Turn on the SEA On/Off Valve.

5. Connect the Air Charging Source Connector to the SEA

and slowly charge the unit to 3000 psi IAW local procedures.

6. Depress the 2nd Stage purge cover two times for about

5 seconds each with a 5 second pause between each purge.

7. Turn off the Air Supply. Vent/purge the charging lines and

remove from the charging source.

8. With the SEA On/Off valve still in the OPEN position,

submerge the entire SEA in water for no less than 2 minutes

and observe for leaks. Verify that no residual air is in the void

spaces of the unit.

a. If no leaks – remove from the water, shake out any

excess water and conduct the pressure drop test, set the

SEA aside for a minimum of 8 hours in a stable temperature

environment, note the pressure on the gauge. Recheck the

unit after the time has elapsed and verify the pressure is the

same +/- 300 psi or still in the green. If the pressure is stable

continue to step 9.

b. If a leak is detected go to step 15 and continue proce-

dure

c. If the unit fails the leak test a second time go to step 16

9. Connect the Charging system to the SEA unit and re-

charge to 3000 psi.

10. Secure the Air supply and remove the SEA from the

charging connector.

11. Upon completion of the pressure drop test, verify no wa-

ter is remaining in the unit and reinstall the Protective Rubber

Cover on the Regulator.

12. Reinstall the Fill Port Cap.

13. The SEA unit is now ready for service.

14. Prior to issue perform the Pre-Flight checks IAW Local

Procedures

TROUBLESHOOTING

15. If a 2nd stage leak is detected, remove the unit from the

water and shake out any excess water. Purge the 2nd Stage

regulator as follows:

a. Depress the Purge Cover for 15 seconds, then release.

b. Wait 5 seconds.

c. Depress the Purge Cover for 15 seconds, then release.

d. Wait 5 seconds

e. Continue to repeat this procedure until the gauge reads

1500 psi.

f. After the cylinder is at 1500 psi, rell the cylinder to 3000

psi IAW local procedures. Repeat step 8.

16. If a leak is still present – 2 options

a. Return to OEM thru local command instructions

b. Shut the On/Off valve and purge the 2nd stage. When

the pressure has been relieved, remove the medium hose

from the 2nd stage. Remove the Inlet tting. Inspect the

gray seat for debris or damage. Remove the seat using the

pointed Brass O-ring Tool (DO NOT puncture), clean it and

put it back in with the DIMPLE UP. Depress the purge cover

and re-install the Inlet Fitting and Torque to 50+/-3 in.lbs.

Connect the Medium hose to the 2nd Stage and torque to

45 +/-3 in.lbs. Open the On/Off valve and repeat the entire

procedure from step 5.

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Aqua Lung SEA MK Troubleshooting Guide Page 22

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