PS Magazine - DECEMBER 1979
PS, The Preventative Maintenance Monthly
ISSUE 325
DECEMBER 1979
["±²
I
The tail rotor drive shafts on your
HUey t±rn at high RPM'S, generating
friction and heat. Without grease In
the coUplings, overheating and seizure
of the drive train wilL result in loss of
taiL rotor control²
Ha³³ens ´µ² if
a
cou³¶ing
gets
overlooked!
For exam³le, the NUmber
1
hanger
bearing-Under the engine taiL ³i³e·
¸s not the fIrst cou³ling In the system²
YoU have to back U³ to the ¹ransmisº
sion anD Lube the quILL cou³ling, whiCh
is
"
actUally the
drive train»
Then, yoU ³rOceed along the driVe
train to lUbe the fLexible coU³lings and
the other qUill coU³lings at the gear
boxes¼
½Ure, the qUill coU³ling at the
transmiss¾¿n is mighty diffic±Lt to
reach: Fact Às; it takes
2
mechs to
remove the clam³s. BUt it only takes
one weak link in the drive shaft chain
L.³´µ-
¶·¸¹
º
»¼
:1u
__±
_
to down a birdÁ
n jnhteNT, Jleas±!
When
you
remÂve
the
hanger
assembly for the lube choreÃduring a
Phase ins³ectionÄnever wash, s³ray
or clean the bearing or cou³lIng wIth
solvent² Åse a cLean, Dry cloth on the
³arts² ½olvent wiLL Leave a film and the
grease won't cLing to the coU³ling
s³lines²
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