PS Magazine - TB 43-PS-685
PS, The Preventative Maintenance Monthly
ISSUE 685
DECEMBER 2009
51
PS 685
DEC 09
No Rubbing Alcohol
Do not use rubbing alcohol to clean
inside
the
Sentinel’s
compartments.
Rubbing alcohol removes the protective
coating on the compartments’ walls,
which can lead to corrosion and arcing.
If you need to use alcohol for cleaning,
use isopropyl.
Safety
Never let anybody on top of the
Sentinel unless the AZIMUTH DRIVE
circuit breakers are off. Otherwise,
that person can be sent flying if the
antenna is accidentally rotated during
maintenance.
Always
check
the
circuit breakers before climbing up
the Sentinel.
RCT
If the hard drive won’t go in
the radar control terminal (RCT)
easily,
something
is
wrong.
If you force the hard drive in,
you can damage the RCT and
cost your unit more than $50K.
That won’t look good on your
next evaluation. The problem
usually is that the hard drive is
backwards. Try reversing it. If
the hard drive still won’t slip in
easily, don’t force it! Tell your
repairman.
Most of the time, blowing out the Flters will be good enough. But if the Flters are
really packed with sand or dirt, wash them out. That’s the best way to get rid of all
that gunk. Let them thoroughly dry before using them again.
Filters
Clean Flters give the Sentinel
plenty
of
clean
air
to
stay
cool. Clogged Flters lead to
breakdowns like blown fuses in
the high voltage bay. The Sentinel
has eight Flters (make that 10
for the newest version) and all
the Flters need to be cleaned at
least weekly. In the desert, make
that daily when you’re operating.
Remember, too, that Flters will
clog quicker after rain.
Good Reception
Thanks to PM
Sentinel Radar System…
Good Reception
Thanks to PM
if your sentinel is
going to warn you
about the enemy, it
needs to be very
receptive.
if you’re receptive
to this pm, count
on good sentinel
radar reception.
Clean flters with either air or water at least
weekly. Clean them daily in the desert.
Never Force hard drive in RCT. IF it’s inserted
correctly, the hard drive should go in easily.
Rubbing alcohol takes
oFF protective coating.
Use isopropyl alcohol
For cleaning.
Make sure AZIMUTH
DRIVE circuit breakers
are oFF beFore climbing
on top oF Sentinel.
hey,
I hear
something
coming.
better
get
ready.
that PM
seems to
have you
hearing
very
well!
685.50-51.indd
1-2
10/26/09
3:20:37 PM
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