PS Magazine - APRIL 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 245
APRIL 1973
You're on yoUr own when it comes to
a problem common to the oil, fUel and
hydR±lic systems on yoUr bird-lIne
chafing.
The parts p±b will give yoU the loca²
tion and tyPe oF clamps to use³ A vibra´
ting, p±lsating line may need an addiµ
tional clamp, tho.
The hydraulIc suction line From the When thIs happens yo±¶ll have to pUt In
reservoir to the pump is a good example. a replacement.
The wire braid can chaFe on the magnetic
An adel clamp in the right place wIlL
plUg In the generator drive gear box. ·revent damage to the lIne.
NOISY PUMP SOLUTiON
Pump not1y
Pump case drAin INCoRRECTly
Ln±²A³´µD on bTTom
o
pUm¶,
cAu±·ng a¸¹ µnT¹ºpm»nT.
lns1±\I prOPRLy. ²de³
lo
p´µ¶-
gr±·h &¸4, StE· b¹
Have a
¸
noisy hydraUlic pUmp on your
HUey? ¹ocus in on the hydraulic system
troubleshooting chart in TM 55º1520»210»
20 (Sep 71)¼
The chart lists the ca±se as pump case
drain line incorrec½ly installed on bottom
oF p±mp¾ causinG air entrapment. You're
pumping air instead oF hydra±lic flUId.
You better believe it!
¹act is, pulsating air pressUre in the
line has been known to crack some of the
plumbing. Many oF the older D and H
models have the line hooked up wrong.
¿o by the book. Hook the line to the
top fittIng, as called For in para 6À3b(4)
of TM 55Á1520º210Â20 (Sep 71)Ã
YoUÄll have to shorten the Line aboUt 12
Inches and Use new ÅÆrings.
Çook sharp whenever yoU change the
hydraulIc p±mp on yoUr baby. TÈe seal
(or seep) drain Line and case draIn line
ports are about the same size. ÉUmps do
get pUt on UpsIde downÊ
With a ˱rphied p±mp you co±ld
spend ±Ì·teen hoUrs lookIng For the
ca±se of faULÍy operatIon.
Keep MUrphy on the bench. ÇooÎ for
the raIsed letterIng Identifying the ports
when yoU moUnt the pUmpÏ
nEW LINE NEEDED
DUrIng tÈe next tImeÂoUt, eyeball the tÈe ÈydraUlIc p±mp rUptUres those oLd
ÐA ¹orm 24Ñ8Â5 In ÒoUr bIrd's log booÎÃ
LInesÓ When that happens the bIrd's hy²
Ëake s±re ËWO 55ÔÕ520»2Õ0Ö×0/×1 ØAUg
ÙraULIc flUId Is p±mped overboarÙ. TÈe
7ÕÚ has been ap·Lied to the hydra±Lic sys»
ÛIÜot Loses hÒdra±lIc boost on the conÝ
CeÞ If tÈe seriaL nUmber of yo±r baby Is
lIsted In the p±bÓ
M
ßhe mod remoVes ÈydraUlIc tUbe
à
PIN
áÑ5»Ñ7âÔáÕã»Õ, and ·Uts In a beefedÂUp
ÜIneÓ äIghÖfreq VIbratIoNs ·roÙUced By
49
åf the mod has not been Ùoneà schedULe
It. æo Èead off a stIcÎÒ sItUatIonà yoUr
ÙIrect sUp·ort çIll aLso aÙd a cÈecÎ vaLVe
tÈat
'
LL èee· hÒdra±LIc fLuIÙ from beIng
pémêeÙ oVerboard IF tÈe neë LIne shouLÙ
faILì
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