PS Magazine - OCTOBER 1974
PS, The Preventative Maintenance Monthly
ISSUE 263
OCTOBER 1974
Some improved aIrcraft hardware, like
the positive retenTion bolts that requ±re no
safety, have made the sCene. Yet
a
Major
b²1rden of holding airCraft parTs togetHer
is Borne by The Cotter pin³
Never Underrate the power of a Cotter
pin´ Rotating, TUrning, twisting, v±bratinG
foµCes are always working .´³ worK±ng .´´
wOrkin¶´ After yoU torque a nuT, iT's the
LiTtle pin thaT can keep a nUt from baCkinG
OF·
SO, AY TIME yo
RemV± ² C³t´r
PiN µns¶·Ll ¸ ¹ºW
»¼½. ¾H¿À
'
ÁÂ DÃÄÅ
cÆÇp ÈÉÊËÌÍÎd ÏÐ
ÑhÒ ÓÔÕÖ ×F ØÙUÚ
ÛÜÝÞ¸f
•±.
×ß
àáuâ ãäåæç
washer undeR eacH nut.
¸f
1
w¹sher fails TO
Cover t±e ²Olt
º»iP¼
O³ yOU caN't
¹li½e
t´e
NUt tO
¹ccePt T¾e cOtter
piN,
Use
1
aDDi-
tiµNAl Was¶er·
èé
¿
O
»e
êëìí 2
W¹ÀherÀ
a
Á
c
needed¸
ÂO
tO
î
s´m;te¹
ÃoLT·
Yº» MaV aLsO ²e a²le tO alI1¼e tHe
ÄOLT
½O¾e anD nut tO accept t´e
coTTer ÅiÆÇ ÃÈ
ºOi½Â
tO e¿t´er
T¾e Éi¶hÊsiDe
Or
LowËÌide Of
T¾e TOrQUe
ïìígð ñí
The ½UTÍ
Àse
cO»»Osi<λeÀÏÌTa½T ÀTeel cotter Åi½À
On¾Á
iÐ ¹»e¹À »eÑÒireD TÓ Ãe ½OnmaÔ½eTÕc
Ânà ÄÅ areaS
WÖeÁE
òóô õîvö
×iØh teÙÚ
Ûer¹TÒ»eÜÝ
ÞO keep
e
O
t
t
Er
PÆNÇ
i½ Place, inserß
the¿ i½ ÁOtàTi½Â ÅarTsá sUch âs a roTor heaDã
with
t´e
cotTer pin head in the direCtion of
ÁOTaTäO½· ¸½ »åÁe caÌeÌ yoÒ may haVe an
inTeræerence problem³ çf soè inserT The cotÚ
ter Åin opposite to direction of rotation´
éUT cOTte» pins in sTationary Boêts w±th
ëhe heads
up O
» facinÔ fOrward, whenever
÷
Possibìe³
46
øùúûúùùúü
wýþ ÿĀÿ
¸f
t´e¹eÈÇ
¹ POssibiLiTy The Cotter pín
¿iÔÉT s½îÔ a½ ai» type's ha½ds, Cïoth±ng or
eðUiPñent, PUt òhe cotTer óin ±n w±th òhe
heaD ¾orizo½taL To the slot in the nut. ôhiÌ
,'
-
"
ā
õetÉod is aLsö used when working in Close
÷UarTers Where yoU have diøCulty insertÚ
ùng the Pi½ú
At leasT
50
percenT of the Cotter p±n
Diameter mUsT Ãe below the nut Castellaû
ü Tioný þf noT, add a seCond washer³
·
,-±²³
±
.´µ
_²
._ ²³
ÿĀā
Y essirĂeËeăe,Ą it was onêy a m±ss±ąg naiê
/
"´
µ
-³´µ¶
:
¸¹º
that lost The shoe ´ ´ ³ that lost the HorseĆ
.
¶·¸¹
Ă㥠ąĆćĈ/ĉĊċ
ČčĎ ď еđĒµēG Ĕµĕ
Ė³ ėĘÇę Ěě ĜÔĝĞ
ğĠ ġĢģĤ Bĥ»ĦħĨ ĩĪīĬ
ĭ»Įįİ ıIJij
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