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, refill 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 fitting. 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.
