PS Magazine - TB 43-PS-529
PS, The Preventative Maintenance Monthly
ISSUE 529
DECEMBER 1996
60±.GPH ROWPU ²²²
Dear EditoR
Pushing salt water through your ±OWPUs takes almost
Twice the pressure that fresh water does. ²hat pressure
CraCks the 0-³Ings in the pressure tubes´ As the 0µ³¶ngs
crack, the ±OWPU has a harder time building up the
pressure to operate· ¸ventuallY it can't´
We¹ve kept up the pressure by replaCing the 0-rings
c:±²³
in all eight endplates annualLº »t's a good idea for a¼l
±OWPU units½ but espeCialLy those processing salt water¾ ²he
0-³Ings are cheap and replacement doesn't take that long¿
²he NSNs for the 0µ³Àngs are in Áhe ²M for your ±OWPU model´
We¹ve also found that putting a dab of silicone lubricant, NSN
³85´-´´-88´-7³1³,
on the 0Ârings helps them slide on easier and
last longer.
SG² Art ²ousignant
p
"
SChoFeld Barracks,
hI
FROM THE DESK OF THE
Replacing the 0-rings annually will prevent surprIses In the feld. The±e a±e a
Couple oF things, hoWeVe² ±epaI±men need to remember:
iµ
³e end plates sometimes aren't interchangeaBle´ µ¶Ying to Force on the
end plate ·an c¸ck the ¹ºBerglass on the tuBe»s studs. That's an expensi¼e ½¾
¿hen Àou take
of
the end platesÁ mark ÂheÃe theÀ goÄ
¶
·
2¸
Åo install the end platesÆ use a torque wrench
9
@
that measures lB-inÇthere's one In the repaiÈman's
´
e
µ ©
Éool kitÊ ËtÌs important that the nuts are giÍen no
3
¶
!f
more than
¹º
lB-in torqueÎ More torque cracks
a
·
4
the tuBeÏ ÐÑghten the nuts Ònger tightÓ then
»
\
torque the nuts in this order to preÔent
¶
¸
¹
unequal torque that also ·ÈACks the tuBeÕ
º
•
¼
½
¾S ¿À9
¿Á
Â
DEC 9Ã
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