PS Magazine - TB 43-PS-563

PS, The Preventative Maintenance Monthly

ISSUE 563

OCTOBER 1999
PS Magazine - TB 43-PS-563 - Page 30 of 34
ome things just shouldn’t happen.
Waiting for the overheat alarm on your
AN/GRC-103 radio’s T-983 transmit-
ter to go off before you clean the air
filter is one of them.
When the panel light lights and the
alarm buzzes, your radio isn’t getting
ready to overheat—it
is
overheating!
AN/GRC-103 Radio . . .
Take a square of paper a little bigger
than the transmitter filter and hold it
flush against the filter frame.
If the paper sticks, you’re getting
enough air to keep your radio cool. If
it falls, clean the filter.
Now, try the test again. If the paper
falls this time, replace the filter.
Try one more time. If the paper still
falls, turn the transmitter in for repair.
When you clean a filter, check its
condition. Replace a filter that has a
broken frame or whose filtering mate-
rial is frayed or torn. NSN 4130-00-
879-2280 brings a new filter with at-
taching screws.
Blow
out
dust
A clogged filter makes
the ventilating fan work
harder. Then the transmit-
ter overheats and the signal
weakens or goes out alto-
gether. Eventually, other
components fail, too.
So check the filter before
every operation like TM
11-5820-540-12 says. And
clean the filters and change
them as often as the environment
you’re operating in demands. That could
be weekly, it could be daily, but you
should know how fast the filter clogs.
Clean a dirty filter and the
inside of the transmitter with low-
pressure (no more than 30 psi) air.
brings an air gun to attach to your
air hose.
If the filter is very dirty, wash it in
warm water and a mild detergent. Let
the filter air dry completely before you
use it.
Periodically during the operation of
the radio, give the filter the paper test.
If you don’t have an air hose, tap
the filter against the heel of your hand.
Wipe out the transmitter with a
clean rag.
-
-heh heh
heh! -
-
i
love
filters!
i'm a
goner
,
connie!
back off
dirt bag
, before
i
blow you
away
!
PS 563
53
OCT 99
Inspect air
filter if
OVERHEAT
lamp lights
PS 563
52
OCT 99
Does filter pass paper test?
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