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4. 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.
5. Feed the hose through the pouch and through the 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 ExtendAire II Intermediate Pressure
Accessory Kit section of this manual for additional help.
6. 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.
7. 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 ExtendAire II
Intermediate Pressure Accessory Kit section of this manual.
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. Discard the hose restraint.
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 ExtendAire II Intermediate Pressure
Accessory 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
MSA 015 (L) Rev. 0 - 10110648
ExtendAire II Repair and Service
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 ExtendAire II Intermediate Pressure Accessory 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.
6. Tighten each quick-connect fitting to 70-75 in. lbs.
Replacement Parts
ExtendAire II Dust Cover Kit
10111351
Dust Cover and Supporting Replacement Supplies
ExtendAire II Pouch Kit
Pouch
10111404
ExtendAire II Hose Restraint Kit
10111405
Hose Restraint and Supporting Replacement Supplies
ExtendAire II Manifold and Hose Assembly Kit
10111406
Complete Manifold and Hose Assembly
ExtendAire II Manifold and Hose Assembly, Less Fittings, Kit
10111407
Manifold and Hose Assembly without Quick-Connects
ExtendAire II Male Quick-Connect Kit
637945
Male Quick-Connect Fitting
ExtendAire II Female Quick-Connect Kit
637946
Female Quick-Connect Fitting
8
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