PS Magazine - TB 43-PS-434
PS, The Preventative Maintenance Monthly
ISSUE 434
JANUARY 1989
UH-60A Black Hawk .
.±
Check Your BeaRings
±²=-
bearing and spindle bracket.
U
ntil recently, all you had to do fr
The 30-hoUr specIal InspecTion oF yoUr
bIrd's maIn rotor head daMper bearings
was check 'em fr wear±
BUt all that changed When a QDR
InvestIgation T²rned ²p some ³ozen
damper boLts in the oUtboard rod end
UH²60A BLack Hawk ³³³
ome BLack Hawk mechanics
·
gLob
on Proseal adhesive when They install
main rotor spindle bolts´
µUt glob¶ed¸on Proseal is a real paIn
to remove nexT time yoU have To re¹
ºove the s»indLe¼
´void gµobs
µiKe thIs
PlUs, when it½s globbed on, It may
noT compleTeLy cover the bolTheads and
nUts¼ ¾hose not covered wIll corrode
easily´
Now yoU¿ve got to cÀeck tÀe bear¹
ings fr pitting and gougesÁ as well as
fr radial and axÂal play±
¾hat½s the word In Para 2Ã84 oF ÄB
43Å0001Æ3-14 (Çeb 88)È
¾he inspection reqUirement Is ÉarT
oÊ ¾ask 9, Step 15, in ¾Ë 55-1ÌÍ0-
237-23Å4´ Înspection procedUres are
spelled oUt in ¾asK 12, Step 6, oF ¾Ë
55Å1520ÅÍ37-23Ï7Ð
Ñnstead oF Proseal, ²se synthetIc rUb¹
¶er seaLing compound, ËÑÒ-S-8
¶
733,
to coat the spindLe bolts¼ ÓSÓ 8030Å
00Å008Å7Ô96 gets a pinÕÖ ApplY IT wIth
38
an acid swabbing brUsh, ÓSÓ 7920-
00-5×4Å2417Ø ¾he bÙUsh Is paÙT oF thE
AVÚË Óo± 2 Tool seTÖ
J·N 89
CH-47 .
..
FmsSe
over
U
se a ligÀt toUch, mecÀsÁ wÀen yo²
¾Àe nUts that FÛsten those linKs to
The bellcranks and servocylinder geT
onLy 30 to 45 lb¸In on yoUr torqUe
wrenchÜ
Ñt doesn't taKe mUch frce For so little
torqUe and thaT's why some mecÀs
overtorqUe those babiesÝ ÞoU've got
To Feel the wrench clicK IF yo² can't
Àear it when yoU reacÀ the lImit´
ÑF yoU overTorqUe The n²ts, yo² strIp
the boLT tÀreads or bend the bell cranks¼
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