TM 5-4220-225-14
NOTE
Use only enough lubricant to coat item(s) without excess.
(7)
Apply a light film of lubricant to new preformed packings (10) and (8).
(8)
Install new preformed packings (10) and (8) and install connector (9) in air supply adapter (5) and tighten.
(9)
Apply a light film of lubricant to new preformed packing (7).
(10)
Install new preformed packing (7) and air supply adapter (5) and align three screw holes.
(11)
Apply a thin film of adhesive sealant to screws (6) and thread screws into place.
(12)
Tighten screws evenly and torque to 15-20 in.-lb (1.7-2.3 Nm).
(13)
Apply a light film of lubricant to new preformed packing (14).
CAUTION
Ensure the flow arrow is pointing into helmet.
(14)
Install new preformed packing (14) and one way valve (13) fully into the bore of air supply adapter (5).
(15)
Install filter screen (12), smooth side up, with cupped side down against one way valve (13) and secure with
retainer ring (11).
(16)
Apply talc to cap gasket (2) and install into cap (1). Ensure the gasket lies flat and fits properly into place.
(17)
Install adapter cap (1) and tighten by hand.
NOTE
Take care not to dislodge connector face seal preformed packing.
(18)
Align tubing connector nut (4) with connector (9) and tighten snugly.
(19)
Install helmet liner (3).
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