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Connecting the ExtendAire II Intermediate Pressure
Accessory Hose Assembly to the PR14 First Stage
Regulator
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 pressure relief valve from the
first stage regulator. Discard the pressure relief valve.
3. Insert the hose into the
port that previously
contained the relief valve in
the first stage regulator
and reinstall the u-clip.
4. Install the PR14 First Stage Regulator into the bracket. Install
two (2) new screws and tighten to 35-45 in. lbs.
5. Feed the left pull strap from
lumbar pad, rescue belt, or
waist belt through the top
webbing loop located on
the back of the pouch.
6. Fully extend the shoulder
and pull-strap. Make sure
the straps are untwisted.
MSA 015 (L) Rev. 0 - 10110648
ExtendAire II Installation
8. Twist the pull-strap
8. With the fold down, pass
9. Pass the strap over the bar
10. Remove the left waist belt
6
clockwise one-half turn. (left
pull strap)
the pull-strap from back to
front through the friction
buckle.
and back through the
buckle.
pull-strap from the friction
buckle. Feed the buckle
through the lower loop in
the pouch and re-attach the
pull-strap.
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