BIRD MARK 7 - Page 17

with a ¥%” open end wrench, being careful not
to lose the small O-ring on the end of the
valve.
3.17 Using a thin bladed screwdriver, remove
the screw and nylon washer forming a plug on
the bottom of the Centerbody.
4.0 VENTILATOR COMPONENT CLEANING
4.1 The components of the respirator may be
soaked (with exception of the manometer, mag-
nets and tubing assemblies) in a liquid
detergent for superficial cleaning. After soaking,
parts should be removed, rinsed and scrubbed,
if necessary, to remove all tráces of lubricant.
Following the completed assembly, it will be
necessary to decontaminate with ethylene oxide
gas sterilization to insure internal sterility of the
respirator.
4.2 Particular attention should be paid to the
ceramic switch. Use an abrasive type cleaner
sparingly with a toothbrush and small diameter
clean or replace inlet filter (P/N 6804) and
reinstall inlet assembly into Centerbody using
78" open end wrench to secure in place.
5.2 Assemble rotary ON/OFF valve as follows:
= Inspect O-ring (P/N 0143) on valve body
wing nut assembly for flat spots, cuts or
damage. Replace if necessary.
и Inspect O-rings (P/N 0114 and P/N 0274)
on valve piunger for flat spots, cuts or
damage. Replace if necessary.
= Place a small drop of lubricant (P/N 631) on
O-ring (P/N 0114) on poppet, prior to
installation.
ms Reinstall components into valve body per
exploded view (Fig. 26) and secure the spring
retainer nut in place witha %e"openend ,
wrench. >
|
NOTE: it may be necessary to stabilize the valve insert
in place with a "46" open end wrench while tightening -
brush (Fig. 25) to clean completely. The clear ? 7 €
the spring retainer nut in place.
ance between the spindle and bushing is nor
maily 0.0001 inch. These contacting surfaces
should be thoroughly cleaned and rinsed in αἱς-
tilled water, if available, and blown dry with clean
compressed air, The shoulders of the spindle
should not be handied in any way once
cleaned.
B Temporarily connect the Centerbody to a
gas source to determine at which point the
gas flow, through the valve, is OFF. Using a
Ye" allen wrench, reinstall the rotary knob with
19
NOLLJAS
the OFF position vertical on the valve.
53 Place O-rings (P/N 5999) onto female quick-
disconnect studs, and with a %e" nut driver or
open end wrench, reinstall into Centerbody (Fig.
27). -
NOTE: Tapered socket (P/N 6835) is the tall socket
and (P/N 4059) is the shorter socket.
FIGURE 25
4.3 Clean, dry compressed air should be used
to dry all channels in the Centerbody and all
other components.
B. ASSEMBLY
5.0 CENTERBODY ASSEMBLY
5.1 With Centerbody in a padded vise, install
new O-ring (P/N 5608) into inlet port. Inspect,
FIGURE 26
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SNONLDMHULSNI
ATANASSYVSH
ONY
ATSINISSYSIĞ