PS Magazine - MAY 1985
PS, The Preventative Maintenance Monthly
ISSUE 390
MAY 1985
UH-1 Fuel Boost Pump .±²
Finger the Fitting
When a fel boost pump light Fashes
i
The Huey's cockit, it signals trouble.
But you may be able TO ±nger the
problem-and solve it²without much
ad³:
ChecK the ´µ±tting, NSN 1560¶00¶
836·9943, in The bOost pump¸ Does it
still have the mesh ±nger s¹reen, PN
10997? Iº so, remOve and
»
dis¹ard the
screen, l¼e it says in Para 10¶1½ oº
´M 55¶1520µ210µ23¶2. ´hen checK To
see iº the warning light goes ¾ut.
¿º ¹Ourse, iº The lighR still shines,
conTinue trOubleshooTing.
´hat s¹reen was designed to
À
Keep
dirt Out Oº The fel system. But there
are so Áany
"
OTher trash traps in The
sysTem, The experts de¹ided the litTle
s¹reen wasn't needed.
Huey Hydraulics ³±³
Head Of ±ose Woes
Chaºed or twisTed hYdraulic hOses and
·
Tubes have
t b
repla¹E .
.. eve Time.
À
So save yourselº exTra worK, Huey
mechs, by paying better attentiOn to
Those hydrauli¹ lines.
´aKe, Ãr exampLe, the hoses that
aTTach tO the cycli¹ ¹ontrOl irreversible
valve. When removÄÅg or insTalling
them, use two wren¹hes to tiGhten each
hose. ´hat wÆl KÇp the hOse Èom
k-
ing, twisting Or breaKing inTeÉally.
´wo wrenches will help yOu seat The
±Êings and avOid leaKs when Ëhe lines
are under pressure, toO.
ÌastÍbut nOt least-That second
wrench will hoLd the hOse away Îom
oTher hardware That cOuld rub it the
wrong way.
38
Iº you ±nd a hose or Ïube that you
canÐt Keep
ÎOm ruÑbing against
someThÄng, spiral wrap it wiTh tape,
NSN 7510µÒ¶923µ0591.
MAY85
Uh´µ
.±²
³
Mind the MaRkER Beacon MatChup
Does your Huey spOrt The Óµ1963/
AÓN glideslope/marKer beacon radio
receiver? Iº so, taKe ¹are to maTe iT To
The right contrOl head.
A mismat¹h ¹ould cause real sTatic
in their relationship.
´he Ó¶1963/AÓN, NSN 5826¶01Ô
015µ1574, TaKes
only
the Cµ6873B/
AÓNµ82 ¹ontrol head, NSN 5826Õ
00¶1Ö9¶1399.
MW¿ 55µ1520µ210¶30¶45 gives
A VIM ÃlKs The word. ´M 11µ5826¶
257¶24 hasn't ¹aught up× but The ´M
11µ1520µ210 series oº manuals show
The correct ¹On±guration.
DOn't try to use a Cµ6873/AØN¶82 orC¶6873Ù/AÓNµ82 wiÚ The Óµ1963/AÛNÜ
´hose
TO
units looK just lÄKe The right conTrol. ´hey hooK up The same, TooÝ
But iº you try tO operaTe the seÏUp, you'll Kill the whole glideslope/marKer
bea¹On system.
So beÃre insTalling a conTrol Ãr your bird's re¹eiver, double¶checK The NSN
or part number.
MAY 85
39
I
I
±²
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