Use only enough lubricant to coat item(s) without excess.
Take care not to damage helmet wiring during installation.
Apply light film of lubricant to new preformed packings (6) and install.
Take care not to dislodge the connector face seal new preformed packings.
Install air supply (2) and tighten two connector nuts (5).
Install microphone (4) on air supply tubing (2). Secure with tie wraps.
Install helmet liner (1).