Installing Quick Connect Adapter To Cylinder; Changing The Cylinder - MSA G1 SCBA Operating Manual

12.3 Installing Quick Connect Adapter to Cylinder

NOTE: A torque wrench with 24 mm open end is required for installation.

12.4 Changing the Cylinder

Removing the Cylinder
(1) Lay the backplate of the SCBA horizontal with cylinder facing up.
(2) Ensure there is no pressure in the system before replacing a cylinder.
(3) Close the cylinder valve.
(4) Turn the regulator bypass counter-clockwise or press purge until air no longer discharges from
the regulator.
(5) Close the bypass by turning the knob clockwise.
(6) Disconnect the the handwheel assembly:
(1) Use only a fully charged cylinder and inspect the external
thread of the cylinder valve to ensure they are not damaged
and free of dirt and debris.
a)The bore of the cylinder valve must be undamaged and free
from dirt and debris.
b)If the cylinder valve is damaged, remove from service and
return it to a MSA trained or certified repair technician.
(2) Inspect the internal threads and nipple of the male adapter to
ensure it is not damaged and free of dirt and debris.
a)Ensure that the o-ring is installed on the nipple and free of
dirt and debris.
(3) Thread the adapter onto the cylinder valve.
a)Securely hold the cylinder assembly and tighten the male
adapter to the valve to a torque of 14 - 15 lbf ft (18 - 20 Nm)
using the torque wrench.
G1 SCBA
Cylinders
US
66