TM 5-4220-226-14&P
4-26. Helmet Adapter Hose Maintenance.
This task covers:
a.
Removal
b.
Installation
INITIAL SETUP
Tools Required
Equipment Conditions
Tool Kit, General Mechanic's (item 4, appx B)
Umbilical removed (para 4-25).
a. Removal
Disconnect helmet adapter hose from main air inlet port on the side valve.
b. Installation
WARNING
Never connect the adapter hose to the emergency air supply
inlet. The emergency air supply valve does not incorporate a
one-way valve to protect the diver from barotrauma (squeeze) in
the event of loss of pressure in the umbilical.
Connect helmet adapter hose to the main air inlet port on the side valve. Install umbilical (para 4-25).
4-34
