PS Magazine - TB 43-PS-634
PS, The Preventative Maintenance Monthly
ISSUE 634
SEPTEMBER 2005
Front and side voicemitters:
If you don't see the four bumps on each voicemit-
ter, the voicemitter is installed backwards and your mask can't protect you. Reverse
the side voicemitter. Use the D-ring on the carrier strap to tighten the side voicemit-
ter's retaining ring. If the front voicemitter is installed backwards or loose, the face-
piece needs replacing. The front voicemitter should never be removed. Loose
voicemitters mean poor protection. Don't forget the gasket when you install the side
voicemitter. Without the gasket, the voicemitter won't seal.
In hot weather especially, check the
gasket for splits and sticky or com-
pressed areas. They mean the gasket
won't give the side voicemitter a good
seal. Your NBC NCO can order gas-
kets with NSN 5330-01-260-8702.
Inlet valve body:
The inlet valve
body assembly must seat completely
in the sideport grooves or the canister
won't seal. If the inlet valve body is
properly installed, you should be able
to rotate it easily with your finger. If
it's difficult to move, install it again.
Also make sure the inlet valve body
spokes aren’t torn.
New nosecup valve seat and new inlet valve:
NSN 4240-01-496-2844 brings
10 new valve seat assemblies that snap into place. Instructions come with the assem-
blies. NSN 4820-01-509-5498 is the new NSN for the inlet valve body.
PS 634
SEP 05
57
ULLS-G…
Misleading Information about PMCS
PS 634
SEP 05
56
how’s it
feel to
breathe
freely
again?
never
better!
Don’t forget side
voicemitter gasket
If gasket is cracked or
gummy, replace it
Inlet valve
body
should fit
in sideport
grooves
NSN 4820-
01-509-5498
is new NSN
for inlet
valve body
The example form
on Page 5
7
of
PS 619 (Jun 04) is
misleading
about
completing DA Form
5988-E.
After doing Before Ops
PMCS enter the date if
there are no faults.
Enter license number
following
After Ops
PMCS if no faults found.
White out the data in the Parts Requested field and use the form as shown on
Page 5
7
as a representation of the PMCS copy of the form.
Unfortunately, data
was inadvertently
entered in the PARTS
REQUESTED fields.
That caused some
readers to point out
you can’t input dates in
the fault description
file in the ULLS-G data-
base without automati-
cally generating an
item Number and fault
items in the Parts
Requested field.
The form is
supposed
to
represent the paper
copy of the form
used for PMCS
checks.
hee
hee
hee
hee
New nose-
cup valve
seat just
snaps into
place
Note, too, that
the date in the
upper left of
the form would
be the date
the form was
printed.
634.56-57(C).qxd
7/29/05
1:22 PM
Page 1
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