DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 468 of 1422
DMR 9·2815·±0
5-53.
Repair and Assembly±
a²
Repair
(1)
Gene³al ³ePaI³ Inst³uctIons²
Refe³ To pa³ag³aph 5´5 µ5/
5
).
(2)
CaMshaft ³e¶aI³²
RepaI³ da·aged tH³eads In The gea³ hub with a use¸ tap²
¹emove sLIght scuffºng o³ sco³ing f³o» camshafT loBes and BearIngs with a fIne oIl
sToNe and poLIs¼ wIt¼ crocus clot¼ dipped iN d³y½cLeanIng solvent (¾-D½680
¿Ype ÀÀ)²
µ3)
ÁaÂshaft st³aIÃHtenINIJ
-±²³
´µ
·±²-
µa)
CHeckIng caÂsHafT Bea³Ing jou³nal ÅuNout²
CaÂsHafts MaÆ be sTraIghtÇ
eÈed If the ³unout of an_one caMshafT bea³In
t
su³face µjou³nal), wHen usINg a
'
dIal IndicaTo³, doEs
-
ro
t
exceeÉ Ê:0ËÌ ÍncÎ
T
aÏ ÐnÑÒcaÓo³ ³eaÔÍng
(
wÕeN
supÇ
porTed aT THe two adJacenT bearIng Jou³nals²
CaMsHafTs THaT exceed 0.060 inch
³unouT betweenÖaNÆ two jou³Nals musT be discarded²
×axImum Øou³naL runout of
st³aig¼tened camshafTs Is 0±00Ù incÚ (¿ÛR) wheN supported aT tHe two adJacenT Jou³Ü
Nals²
ÝfTe³ sTraIghTening a cams¼ÞfTß the MaxIÂum acceptable ³unouT of the ceNTe³
bearINg Jou³naL, when suppo³Ted at the end Jou³NaLs, Is àá0â5 inc¼ µ¿ãR)²
ähecK
camsHafT bea³Ing jou³Nal runouT as foLlowså
Suppo³t the caÂshafT at the two end jou³nals In
V
BlocKs on a su³face
)
plaTe o³ oThe³ avaIlable cente³ing devIce, such as a Machine lathe²
)
æ
¾osçtçon a dIal Indècato³ at The cenTe³ bea³Ing jou³naL and oBTaIN
a zero ³eadiég on THe dial²
3
RoTaTe the caÂsHafT and deTermine the MaxIÂum T³aveL of t¼e dIal Indicaê
tor NeedLe²
ëf traveL µìëR) exceeds 0²015 inch The camsHaft musT Be
straIgHteNedí
4
RepeaT steps
and î above fo³ each Bea³ing Jou³nal and Âa³K posITIon
and dIÂensIon of ÂaxIÂu» dIal indIcato³ ³eadIng at each jou³naïð
'
5
ChecK ³unouT of each cñms¼afT Bearing jou³nal²
Support T¼e camsHaft
In
v
bLocKs at the adjacent jou³nalsò and usIng a dIaó IndIcato³ô checK
and record Journaõ ³unouT (öÀR) dimensIons²
ëf ³uNout exceeds àá00÷
inchò camshafT must be sT³aig¼tened²
(b)
Camshaft st³aIÃhTeNinø ùrocedu³eú
ënsTall caMsHaft oN truiNg devIce µfIgû 5ü55ý
µ5þ3ÿý wIt¼ bearing
Jou³NaĀ havIÈg The maximu· ³unout µöëR) posItioNed uNder The p³essINg
spIndleā
(öHe caÂshafT jou³NaĂs musT Be ³estIng on The supporT BlocKs
wHen roTating tHe camsHafT to deteăine The ³unouT²)
Ąet dIal oN Iną
dicato³ To Ze³o and roTaTe camsHaft to deteĆIne locaTion of runout
(¿ćR) aNd record ³eadingú
5/330
¶
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