PS Magazine - TB 43-PS-717
PS, The Preventative Maintenance Monthly
ISSUE 717
AUGUST 2012
39
PS 717
AUG 12
•±
The Firefinder and Sentinel
high voltage resistor swings
down
and
discharges
any
electricity
in
the
high
voltage
compartment.
The
Firefinder Q-37V (9) does
away with the resistor. But
if its contacts are dirty, all
that electricity might not
discharge and you could be
in for a nasty shock. Avoid
that
shock
by
cleaning
the contacts for the high
voltage
resistor
monthly
with
technical
isopropyl
alcohol,
NSN
6810-00-
753-4993. While you’re at
it, clean the area where the
resistor contacts the high
voltage compartment.
The
Firefinder’s
radar
processor has vents that pull
in much-needed cool air. Of
course it’s important you keep
those
vents
clear
so
they
don’t plug up and cause the
processor to overheat.
But no matter how hard you try in the desert, sand will get through the
vents and filters and clog the fan. The fan has to work harder and harder
and eventually it fails. We prevented that by removing the fan every other
week and using compressed air to clean it. Because there are only 11 screws
holding the fan assembly, you can do it in minutes.
SSG Jeremy Hicks
Ordnance Training Detachment
Ft Sill, OK
Editor’s note:
Sentinel and Fire-
fnder crews need to keep these tips on
their radar. Thanks ±or sharing them.
Fabricated mount problems include:
•±
mount welds that create stress points
that could weaken or even break with
continued use
•±
the three points of contact from the
tripod feet to the fabricated mount may
not be secure
•±
the angled supports from the baseplate
to the pole could pose a tripping hazard
•±
the method used to secure the tripod
could damage the equipment it’s
mounted on
There is no need to fabricate mounts.
The Army has two mounting solutions
and both will do a good job supporting
your M249 or M240B machine guns on
either a HMMWV ±atbed or on a gun
tower:
•±
the M197 mount, NSN 1005-01-413-4098,
with or without the LMG/MMG cradle,
NSN 1005-01-553-0683, and the M7
pedestal, NSN 1005-01-518-9037
•±
the MK 93 MOD2 mount, NSN 1010-
01-502-7547, with MK 93 adapter, NSN
1005-01-531-1676, and the M7 pedestal
Machine Gun Mounts…
DON’T
Make Your Own Mounts!
These
are
the kind of
tips we need
to keep us
tip-top!
Clean high voltage resistor contacts and where
contacts touch high voltage compartment
In desert areas,
clean radar
processor vents
and fan every
other week
some Army units
have decided they can
fabricate their own
machine gun mounts.
if you have any mount
questions, contact tacom’s
aaron bennett at dsn
7
86-13
7
6,
(586) 282-13
7
6, or email:
aaron.m.bennett5.civ@mail.mil
That could
turn out to be
a
dangerous
decision.
717 38-39.indd
1-2
6/22/12
11:47 AM
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