PS Magazine - TB 43-PS-412
PS, The Preventative Maintenance Monthly
ISSUE 412
MARCH 1987
JUH-60A
.±. f
Whole Lota Shaking Going On
Engine vibration giVes your Black Hawk's maiN tra±smissio± oiL fler scre²±
the shakes.
Too Much Vibration Fr too long puts the wha³my on the ´lµer screen¶ It will
disintegRate and co±tam·Nate the tra±sm·ssio± lube¶
¸ibration a¹so causes the scre²n's shouldeR to wear through
and lets the screen ºall
i
the tra±sm·ssion»
HERE'S
HOW TO CUSHION THE SCREEN
)
'
Preformed
packing
•
Open the oil filler cap and liF ouT the
screen. Clean tHE screen wiTh meTHyl-
ethyL±keTone or a Lacquer THinner.
•
InstaLl a prefoRmed packing,
NSN
53±0-00-579-3163,
using aDHesive²
NSN
8.²³´4-91µ,
to boNd iT iN pLace ³ght
uNder the screen's sHouLder.
•
´ut the filler screen back in and
you're back in business.
t,.±-²³´
Lockwire NSN
1µ¶·¸
\
You can use ¼032-i½ saºety wire to i±sta¹l the UH-1
t
rotor dust boot i±stead
oº the ¶¾2¿in wire ca¹µed Fr in Para 5¿97g oº
±M
À5¿1520¿210-23¿1¶ Get a 1¿lb
sÁol oº the sma¹ler wire wÂth
nsn
9505¿Ã¿293Ä208¶ The smaller wire wi¹µ be
²
an upcoming chaNge tO the
±M.
38
mAr 87
¶
Uh±1 .²
-²³
Work
Aid Helps C±eck BeaRings
´_
Dear Editor,
It's almost impossible to get accuRte bearing ±adings using dial
indicator, NSN 5210-00²277²8840, because the³'s no place to securely
mount the indicator without using heavy clamps or some other make´
shif appaRtus which can damage the Fght contµls or mast assembly.
I suggest using a wooden work aid that mounts to the main rotor
mast. Because o¶ the design and hardwood material, it eLiminates any
chance o¶ damage to the mast.
Make a 3·4
x
3·8²in gµove in one side o¶ the ¸lock to accommodate
the dial indicator. Then attach the work aid and dial indicator to the
-Bu³
h´µge
µop view
4¶"
mast with an 8-in steel
clamp. It a¹ows mechaniCs
to take accURte ±adings
o¶ a¹ ºight cont»l ¼
in the mast area.
0·¸¹º5»¼½¾¿
mAr 87
¶nd view
Similar Work aids ¶or
otHer helicopters would
be easy to make simply by
increasing or ³ducing the
size o¶ the cutout in the
wO a½ to
f
snUg¾
a
the mast assembly.
Bu³_
µ¶
h´µge
•
GÀoove Áo
T
³·
ÂccoÃÃodÂÁe
Y
,,
B
d´ÂlÄ
4
±
ŵd´cÂÁoÀ
·
J
David A. Placek
¿ashington, PA
(Editor's note: ·ounds like an easIer
anD betteR wAy to do the job¸)
´
T
-=±²³:
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