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Recording and Documenting the EBSS Upgrade
Using the log entry form that was included in the ExtendAire II EBSS
conversion kit, the CARE Technician shall record and document the
serial number of the FireHawk M7XT SCBA(s) that are upgraded with
EBSS. This information must be stored and maintained for a
minimum period of 5 years.
REPAIR AND SERVICE
The following repairs require that the cylinder be disconnected
from the air mask. For additional illustrations and supplemental
instructions, refer to the FireHawk M7XT Installing the ExtendAire II EBSS
Conversion Kit section of this manual.
Replacing the Dust Cover
To replace the dust cover, the ExtendAire II Dust Cover Kit, P/N
10111351, is required.
1. Remove the two (2) screws in the first stage regulator bracket and
remove the PR14 First Stage Regulator. Do not remove the
regulator bracket from the backplate. Discard the screws.
2. Remove the lower u-clip and the ExtendAire II emergency
breathing hose from the PR14 First Stage Regulator.
3. Remove the ExtendAire II emergency breathing hose from the
hose restraint and from the pouch.
4. Remove the old dust cover by sliding it down the hose and away
from the manifold.
5. Install the new dust cover by sliding the dust cover over the hose
until it reaches the manifold end of the hose assembly. Verify that
the dust cover orientation is correct by placing the dust cover
over the quick-connect fittings.
6. Feed the hose through the pouch and through the hose restraint.
Verify that the hose restraint is securely attached to the backplate.
7. Before installing the hose into
the first stage regulator, replace
the o-ring on the hose fitting
with the new o-ring provided in
the replacement kit. Apply
Christo-Lube to the o-ring. Insert
the hose into the first stage
regulator and replace the lower
u-clip.
8. Install the PR14 First Stage Regulator into the bracket. Install two
(2) new screws and tighten to 35-45 in.lbs.
Replacing the Pouch
To replace the pouch, the ExtendAire II Pouch Kit, P/N 10111404, is
required.
The ExtendAire II emergency breathing hose does not need to be
removed from the first stage regulator in order to replace the pouch. To
install the pouch, refer to the Installing the FireHawk M7XT ExtendAire II
EBSS Conversion Kit section of this manual.
MSA 416 (L) Rev. 0 - 10158013
EXTENDAIRE II REPAIR AND SERVICE
Replacing the Hose Restraint
To replace the hose restraint, the ExtendAire II Hose Restraint Kit, P/N
10111405, is required.
1. Remove the two (2) screws in the first stage regulator bracket and
remove the PR14 First Stage Regulator. Do not remove the
regulator bracket from the backplate. Discard the screws.
2. Remove the lower u-clip and the ExtendAire II emergency
breathing hose from the PR14 First Stage Regulator.
3. Slide the old hose restraint down the hose and away from the
manifold to remove. Remove the hose restraint from the
backplate and discard.
4. Feed the hose through the new hose restraint. Connect the hose
restraint to the backplate.
NOTE: Be sure that the hose restraint orientation is correct. The
orientation varies depending on the lumbar pad configuration. Refer to
the Installing the FireHawk M7XT ExtendAire II EBSS Conversion Kit
section of this manual for additional help.
5. Before installing the hose into the first stage regulator, replace the
o-ring on the hose fitting with the new o-ring provided in the
replacement kit. Apply Christo-Lube to the o-ring. Insert the hose
into the first stage regulator and replace the lower u-clip.
6. Install the PR14 First Stage Regulator into the bracket. Install two
(2) new screws and tighten to 35-45 in.lbs.
Replacing the Hose and Manifold Assembly
To replace the entire hose and manifold assembly, the ExtendAire
II Manifold and Hose Assembly Kit, P/N 10111406, is required.
If it is desired to salvage the quick-connect fittings and reuse them
on a new hose and manifold assembly, the ExtendAire II
Manifold and Hose Assembly, Less Fittings, Kit, P/N 10111407, is
required.
To install the hose and manifold assembly, refer to the Installing the
FireHawk M7XT ExtendAire II EBSS Conversion Kit section of this manual.
To reuse the quick-connect fittings on a new hose and manifold
assembly:
1. Secure the manifold with a wrench or vise.
2. Remove the quick-connects using a 7/8" wrench.
3. Remove the o-ring from each quick-connect fitting, discard the o-
rings.
4. Apply a small amount of Christo-Lube to the new o-rings
provided with the kit.
5. Cover the threads of the quick-
connect with a thread protector,
tape, or paper to protect the o-
ring while it is installed on each
of the quick-connect fittings.
Slide the o-ring over the threads
and remove the thread protector
tape or paper.
6. Tighten each quick-connect fitting to 70-75 in.lbs.
6
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