PS Magazine - FEBRUARY 1982
PS, The Preventative Maintenance Monthly
ISSUE 351
FEBRUARY 1982
UH-1
to
UH±GOA .²²
·-
±
²³
±
´
µ
-±²³´µ
Sav
e
t
h
E BEAring
.
Take the Black Hawk rotor head,
for example± It ²as a Lot of bearings
with TefLon liners± From your Huey
days you know t²at TefLon can't stand
any type of petroleum product±
Yet³ to clean ´em, some mechs have
been spraying
those
bearings
with
solvent± The resuLt is an oil-soaked
liner, foLLowed by TefLon chips, metaLµ
to¶metaL contact,
and a shot bearing·
The swas²plate and bifiLar are t²e
onLy parts in the rotor ²ead that get
Lubricated±
To remove any brownish resiDue
(which is not rUst), cLean the bearings
with a cLean, dry rag±
Checking the transmission oil ¸evel
on your bird takes a LittLe Patience¹
and
2
or
3
tries±
How come? Well, there´s an 0-ring
at t²e top of the dipstick that keePs
water out of the oiL± ºnfort»nateLy, it
also traps air in the dipstick tube± Oil is
slow to ret¼rn to the tube so you won't
get an accurate c²eck the ½irst time±
You´Ll get a Low oil LeveL reading¾
±8
You
never
want
to
overfiLl the
transmission because you cou¿d wiNd
up with a Leaky main rotor shaft seal±
RepLacing a shot seal means a lot of
sweat and elbow greasEÀ
Removing t²e dipstick a couple of
times wiLL remove t²e air and give you
an
accurate reading±
An
oiL
Level
between ÁOW and FºÁÁ indicateS
you ²ave about t²e required amountÂ
7 gaLLons±
W±TH YouR s²³p!
When
you´re
topside,
give
t²e
auxiLiary power unit air inLet screen
pLenty of room± A boot pLaced squareÃy
on the screen wiLL crack it±
The engine inLet in a BLack Hawk
engine is more open to the eLements
t²an t²e Huey engine±
Rain
can
drive
past
the
TÄ7ÅÅ
engine inLet covers and pudd¿e± W²en
t²e
temperature
drops,
t²e
water
freezes±
T²en, w²en t²e engines are cranked
up, engine heat and vibration wiLL
cause the ice to break up and be sucked
into t²e engine± You´ll end up with
foreign object damage!
¶
¸¸
¸¸
.¶·
C²eck the engine inLet for water
w²en you remove t²e inLet coverÆ
±9
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