PS Magazine - TB 43-PS-642
PS, The Preventative Maintenance Monthly
ISSUE 642
MAY 2006
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..3 IN NORMAn POSITION CAN
INCREASE WATER INTRUSION
fHE UP POSITION AnnOWS WATER TO DRAIN AWAq
FROM SEAn AND REDUCES WATER INTRUSION
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ECHANICS, IS YOUR +IOWA 7ARRIOR'S MAST-MOUNTED SIGHT (.
.3) LETTIN' IN TOO MUCH WATER
WHEN IT RAINS?
*F THE ANSWER IS YES, THE PROBLEM COULD BE THAT THE SEAL BETWEEN THE UPPER AND LOWER
SHROUDS OF THE .
.3 IS NOT SEATED CORRECTLY/
4HE EXCESS WATER GETS INTO THE .
.3 BY RUNNING DOWN THE SEAM BETWEEN THE UPPER AND
LOWER SHROUDS/
3OMETIMES THE SEAL GETS PINCHED AND ALLOWS WATER INSIDE THE .
.3 THAT'S STOWED IN THE
NORMAL POSITION/ ! VISUAL INSPECTION ISN'T ENOUGH TO TELL IF THE SEAL IS PINCHED/
4HE .
.3 HAS DESICCANT INSIDE TO ABSORB WATER AND MOISTURE/ *F TOO MUCH WATER GETS IN
BECAUSE OF A CRUSHED OR PINCHED SEAL, THE DESICCANT WILL BECOME TOTALLY SATURATED/ 4HEN,
ADDITIONAL MOISTURE WILL ACCUMULATE, ALLOWING INTERNAL ELECTRICAL COMPONENTS TO SHORT OUT/
#HECK THE INDICATOR/
*F YOUR BIRD'S .
.3 TAKES ON TOO MUCH WATER, YOU'LL HAVE TO CALL YOUR !6*. SHOP TO lX THE
PROBLEM/ "UT TO AVOID FUTURE MOISTURE PROBLEMS, POSITION THE .
.3 IN THE FULL UP POSITION/
4HE SEAM BETWEEN THE UPPER AND LOWER SHROUDS SHOULD BE PARALLEL TO THE GROUND IN THIS
POSITION, WHICH WILL KEEP THE MAJORITY OF THE WATER OUT OF THE SEAM AND OUT OF YOUR .
.3/
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