Cylinder And Valve Assembly; Carrier Assembly - MSA G1 Operating Manual

(3) Inspect the high pressure relief valve for damage.
Ensure the relief valve label is not damaged and that the relief valve ports are not showing.

If damaged, remove the SCBA from service and replace the relief valve.

(4) Reattach handwheel to the cylinder valve.

Threaded connect:
Thread the handwheel coupling nut onto the cylinder threads. The handwheel should be

hand-tight (no tools).

Quick connect:
Push the quick connect coupling onto the cylinder valve adapter until an audible snap is heard.

The handgrip will rapidly rotate approx. 45° counter clockwise indicating that the valve is
connected to the pressure regulator.
Grasp the handwheel firmly and pull on it to ensure the handwheel is fully attached.

(5) Ensure that the bell is properly aligned and that the screws are tight. The bell should not be able
to be rotated or loose.
If the bell is loose or can rotate, remove the SCBA from service.

4.4

Cylinder and Valve Assembly

(1) Check the hydrostatic test date on the cylinder approval sticker located on the cylinder neck.
Carbon-wrapped cylinders must be tested every five years.
(2) Ensure the needle and gauge face on the cylinder valve gauge are clearly visible and that the
gauge stem is not bent.
(3) Ensure the rubber boot is present on the cylinder valve. If the boot is missing, remove from
service and until a new one is installed.
(4) For a remote connect cylinder, ensure the dove tail feature is not damaged or cracked. If
damaged, remove from service.
It is also essential that the required inspections and tests be performed on all SCBA cylinders in
accordance with Department of Transportation (DOT) regulations. DOT regulations require that
composite cylinders be retired from service after the fifteenth year. This does not include cylinder
valve assemblies that may be reused. Contact an MSA distributor or sales associate for more infor-
mation regarding this policy.
4.5

Carrier Assembly

(1) Operate the latch on the cylinder band to ensure that it opens and closes properly and that it
holds the cylinder securely.
(2) Ensure that the lumbar pad is attached securely.
(3) Ensure the power module and pressure reducer are secured to the backplate by the lower cover.
(4) For remote connect cylinders, ensure the dove tail feature on the lower cover is not damaged or
broken.
G1
Visual Inspections
23
US