PS Magazine - TB 43-PS-485
PS, The Preventative Maintenance Monthly
ISSUE 485
APRIL 1993
OH-58AC
Main
Rotor Hub .
.±
Ge
tl
1±
T
e Les
T
O
a
T of eu1±s
J
f
bearings In youR maIN Rotor hub aRe fAiling,
chances are The fIRsT faIlURe was in pRevenTIve mainteNance.
WheN ±he gRease doesn'T do iTs job IN The gRease-lUbRIcated
main RoToR hUb² The beaRing will groove The Race and FaIl.
³he preventive mainTenaNce key is KeepINg fresh
gRease In the hUb´ µig
1-5
of ³M
55-±520²228-
23³´
gives a Lube inteRvaL oF eveRy
25
hoUrs¶
bUT yoU shoULd ThINk oF That as The maximUm
INTe·vaL¸ ³heRe aRe many FacToRs, ¹ike cLimaTe
and soIL¶ ThaT couLd lessen the iNTe·vaL¸
ºF you opeRaTe IN a hoT² sa»dy aRea² FoR exampLe²
That inTervaL may need To be as Low as
±µ
hoURs¸
¶6
PReveNTINg fa¼LURes Is
whaT PM is aLL about¸ ºF
you½re weaRINg oUT
beaRINgs and Races² ask
yoUR commandeR to
LoweR ThaT
25
hoURs To
20
hoURs¾ WaTch yoUr
repair RecoRd¿ ÀedUce
Time UNtIL yoU'·e geTÁ
tiÂg maximUm peRfoRÃ
mance oUT oF The
beaRINgs.
APR9¶
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