PS Magazine - SEPTEMBER 1982
PS, The Preventative Maintenance Monthly
ISSUE 358
SEPTEMBER 1982
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It. Takes only a few minuTes for all
the oil in a Huey or Cobra transmis-
sion to squirT pasT a blown oil filTer
gasket± And with a dRop in oil pres-
sure, the piloT has to set 'er down
before The Tr²nsmission Seizes up³
IT happens, bird mechs, if T´e diskµ
tYPe oil filter is not installed rig´t!
¶o after yoU inspecT T´e filter for
contamination, use a
new
gasket,
Use a
new gasket
N¶· 5330¸00¸107¹5393º »ememBer
that The filTer is on the pressu"e side of
the oil pump ²nd the gaskeT has To
hold¼
Make sure you seat the gasket over
Seat the
gasket. .±
. .² Then
add filter
·
On one transmission failurE½ for
example, all the Trans¾ission oil was
l¿sÀ¼ A crease in T´e gasket s´owed
t´at it wasnÁt seated¼
ALso c´eck out a low¸r²nge torqÃe
wrench from the Tool crib¼ ÄighTen
t´e 4 filter retaiing nuts to The
torque value and sequence listed in
Åara 6Æ49 of ÄM 55Ç1520¸210È23º
Ä´e special insPection of The oil
fiLter every 25 flig´t¸´ours increases
the chance of inst²lling it wrongÉ
Don'T blow it!
42
'" 1-UT HOW wA
L t±KO² l Sho³DN´µ
GRE ¶·¸ dIVe g¹ar?
.º»¼½¾¿ÀÁÂÃ
Ä
,'.±²³ ´µ¶¸¹º»¼½¾¿ À
ÅÆÇÈ ÉÊËÌÍÎÏÐ
W´en
mounTing
on a ĸ53 engine, never use grease
on t´e drive gear or the mating
splines
I
in t´e accessorY
gearÊ
box¼
Ähe installed drive gear is lubË
ricated and cooled by engine oil¼ Ähe
oil flows T´ru an oil hole in The gear to
lube t´e splinesÌ
If the oil ´ole is plÃgged up by
grease, t´o, youÁll get excessive wear¼
Ähe result wÍll be sPline failure, folÎ
Lowed by engine flameoÏt¼
¶o leave the ge²r drY, as indicated
in T´e CAÐÄIO· on Ñage 6Ò1Ó of
ÄM 55¸2840Ô229¸23¼
Õ
Togetherness' COunts
!±·²
_Á7
·
²³
ÑÒÓ
ÔJ:,ÕÖ×
¼
\:
ÂÃ
_
Ø
Ö×en
yoU Mohawk engØe mechs change a nose section, m²ke sÏre yoU
Ùlso change t´e rear bearing support³
Ähe reduction gear assembly contains the bearing race, w´ile the sÃpport
has The bearing¼ Ä´e r²ce and bearing are a matched assembly, havÚng the
same serial nÏmber¼
d
.±. aN
³he
race .
..
beaRing .
.´µ
"ÄÅ
±¶¶ are a matE
ÙÚ
assembly
W´at happens if yoU donÁT keep the parTs together? ÅlentyÛall badÜÜ
Ähe wear pattÝrn is changed and clearance beTween an unmatched race
and bearing may be beyond limiÞs³ ßou could get an early bearing failÃre¼
Never ch²nge ´²lf a bearing¼ Keep Tàe ²ssembly together_
43
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