TM 5-4220-233-14
(1) Disconnect flexible hose (1) from CGA347 fitting (2) at cylinder valve (3) and bag hose end.
(2) Loosen four adjustable stops (4) on cylinder holddown bracket (5) securing cylinder to be replaced.
(3) Remove three quick-release pins (6) securing cylinder holddown bracket (5) to frame (7), then pull
bracket off frame.
(4) Loosen wing nuts (8) on two cylinder clamps (9) until "T” bolts (10) can be disengaged t
o separate
clamp halves.
(5) Slide cylinder (11) back on frame (7) and lower to ground.
b.
Installation.
NOTE
Prior to installing cylinder ensure the following:
Documentation is available that certifies cylinder and valve have been cleaned for
breathing air service.
Hydrostatic pressure test date stamped on cylinder indicates cylinder has been
tested within the last five years.
Serial Number stamped on cylinder is same as certifications.
(1) Slide cylinder (11) onto frame (7) until cylinder is fully seated into gasket (12) at frame bulkhead.
(2) Rotate cylinder to position CGA347 connection on cylinder valve (3) for installation of flexible hose (1).
(3) Couple cylinder clamp (9) halves together by installing “T" bolt (10) and tightening wing nuts (8).
(4) Position cylinder holddown bracket (5) on frame and insert three quick-release pins (6) to secure
bracket (5).
(5) Tighten four adjustable stops (4) on cylinder holddown bracket (5) to secure cylinders In fore and aft
direction.
(6) Connect flexible hose (1) to CGA347 fitting (2) at cylinder valve (3).
(7) Perform a leak check on all connections loosened during this task as prescribed in paragraph 4-20.
4-22
