PS Magazine - TB 43-PS-572
PS, The Preventative Maintenance Monthly
ISSUE 572
JULY 2000
Seal in good shape?
Tape worn areas
M139 Mine Dispenser . . .
M139 Volcanos won’t be delivering
many mines if they sit for weeks in
containers that have lost their water-
proof seal or if they are covered with
ragged covers. Water corrodes connec-
tors and causes electrical problems that
put out the Volcano’s fire.
After storing the cases, wait a couple
of days and then push their relief
valves. If the case seal is good, air will
come out. No air means the seal needs
to be checked out.
If the Volcano is not going to be used
for a while, disassemble it and store it
in the storage cases. But first make
sure the cases’ seals are glued in place
and in good condition. After you’ve
shut the cases, check that each case’s
35 latches are tightly latched. If a latch
is loose, tighten its locking nut.
Check latches for tightness
Tighten loose latches
That way the rack wears on the tape,
not the cover.
Push relief valve to check seal
this
rain
is
killing
us!
yeah,
we need
better
protection
.
keeping
track of when
your volcano's
used
is
the
only way
to know
when capacitors
need charging.
Even if the cases seem to be doing
their job, it’s a good idea to open them
after a heavy rain to be sure no water
is inside.
Also check out the protective covers
for the launcher racks. The edges of
the mine receptacles wear holes in the
covers and that lets moisture inside to
corrode the connectors. If the cover is
fraying, tape across the worn areas.
Your best bet, though, is to get a tarp
that covers the entire truck bed or car-
rier. That will do a much better job of
protecting the racks from moisture.
Remember, if the Volcano sits for
more than a year without being used,
its dispenser control unit and rack elec-
trolytic capacitors develop permanent
shorts. Support needs to charge the ca-
pacitors at least every 12 months.
Keep track of when the Volcano was
last used or its capacitors were last
charged on a DA Form 2408-4, Weap-
ons Record Data card. If you ever lose
track, get the capacitors charged just
to be safe.
PS 572
25
JUL 00
PS 572
24
JUL 00
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