PS Magazine - TB 43-PS-739
PS, The Preventative Maintenance Monthly
ISSUE 739
JUNE 2014
44
PS 739
JUN 14
45
PS 739
JUN 14
Before
you
shoot:
W
hen it’s time to use your common remotely operated weapons
station (CROWS) II, it’s important to frst unlock all the locks.
IF
CROWS is locked when you power it up, major damage to the main
Frame assembly can result.
That can cost more than $40,000 to fx!
•±
Disengage the azimuth (AZ)
lock
Clean±Back±of±Radiator±Every±Six±Months
This is critical iF you’re operating in a sandy environment. Oil and sand collect on
the backside oF the radiator. IF it gets too dirty, the radiator can’t cool the generator
and it overheats. That can kill the generator.
To clean the back oF the radiator,
you’ll need to get your mechanic
to remove the Fan guard, which is
held in place by several screws.
Spray low-pressure water through
the Front oF the radiator to loosen
up the gunk. Then use something
soFt and ±exible like a playing
card to scrape oFF the gunk. Don’t
use anything metallic that could
damage the radiator coils.
•±
Put the ELEVATION (EL)
transport lock in OPERATION
•±
Remove the SSA clamp assembly and stow it in the
support equipment bag
powering
up!
if the M240-series machine gun op rod gas piston
pin loosens too much, your gun will
stop
firing.
Operators should immediately
check all their M240 op rods
for loose pins. Just feel the gas
piston to see if it’s loose. it’s OK
for it to move a little.
Also check
for any
damaged or
missing op
rod parts.
M240-Series
Machine Gun…
LOOK FOR L
O
O
S
E
OP ROD PIN
M153 CROWS II…
This check will be added to
the PMCS in the next update
to TM 9-1005-313-23&P.
There is no fix for a loose
piston pin other than to
replace
the op rod.
Run low-pressure water through front
of radiator to knock loose crud
Of course, when
you’re done with your
mission, you need to
relock
CROWS.
Holey
moley!
you forgot
to
unlock
me.
I think you
just did
in my main
frame.
UnlOCK
before
powering
up!
739 44-45.indd
1-2
5/2/14
3:47 PM
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