DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 332 of 1422
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OMWR 9·2815-220
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5-37.
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Cont
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Use a 1/4-iNch drIll to dRill ±ocker coveR doweL Ho²es THRougH
fRom iNsIde to outsIde oF RockeR coveR³
2
AsseMbLe Rocker coveR to cylinder aNd checK caMshaft BeaRINg boRe
dI´nsIonµ
DIMeNsIoN must be 1³¶1·5 to 1¸¶125 INcH³
¹f caMsHaft
Bore is greaTeR THan the prescRIBed ºI´nsIoN, ReMove coveR fRom
cylinder»
¼acHINe mating surface of rocker coveR To obtaiN the
corRect dI½nsIon»
¾FTeR oBtaInINg correcT camshaFT BeariNg boRe
dIMensIon¿ Loosely asseMBLe RockeR cover to cylINdeRµ
3
Ànstall a plug MachINed to 1Á¶080 to ÂÁ4Ã00 INcH dIaMeTer by 2Ä500
INcH Long IN the camsHaft BeaRINg boRe To aLigN rockeR coveR to
Å
macHiNe suRFace oF The cylINdeRÁ
¾LIgn the rocKeR coveR To obtain
a 6µ2¶60 to 6³25¶0 iNcH paraLLeL dImeNsIoN BetweeN The rocKer coveR
and cylInder Head at the sIde moÆNtINg suRfaces¿
and a dIMension of
2³5000 to dz50Â5 IncH at The camsHaft dRIve HousINg boRe³
ÈIgÉten
rocKeR cover MouNTIng capscrews to Â00 lb-INÁ
¶
EnLarge existiNg Ê/¶-iNcH dowel pIN HoËes usiNg a Â9/6¶ Inch dRILlÁ
DRIll Holes tHRougH the RockeR coveR aNd 1/Ç IncH beLoW tHe contacT
face oF the cylIndeR HeadÁ
ÌeaM hoLe to 0³3090 To 0³3100 INchÁ
_ÍeMove RocKeR cover and couNteRsINk doWeL hole iN c
Î
VlINde
Ï
R
Ï
Ð
Head 90
degrees To 0»3¶00 dIaMeTeR³
¹NstaÑl 0µ3Â25 x 0³6Ç00 INch LoNg doWeL
Ò
pins IN cylINdeR head to a Height of 0µ1900 above RocKeR coveR sur
Ó
Ô
face.
5
Ìeam dowel hoLes iN rocker coveR 0Á3125 To 0³3Ã35 To 0³3000 To
0Á3600 depTH³
ÕoÖnteRsINk 90 degRees to 0µ3400 dIaMeteR.
¹NstaLl
0³3Â25 x 0³3800 INcH long dowel piN iN ouTeR end of eacH of the
doWel Holes in The RockeR coveRÁ
DrIve piN 0×0300 BeloW surface³
Peen outeR eNd of HoLe To pRevent Loss of doWeL pinsÁ
6
ØNstaLÑ ±ocker shafts
i
±
:
RockeR coveR and asseMbLe to cyLINdeR Head
ÆsÙng pRoper quaNTItyÚoF mounTINg capscReWsÁ
ÛoRQue tHe FouR valve
rockeR beaRINg capscreWs To 275 to 325 lB-IN³ aNd tHe RemaINinG capÜ
scReWs To 100 LB-Inµ
ÝIne boRe camsHaft BeaRiNg boRe to 1³¶ÂÂ5 to
³4125 iNÞH dIaMeteR³
CßUàáOâ
ãxTReme care Must äe takeN to assuRe tHat åTal is Removed fRoM tHe
Rocker cover oNlyÁ
Do Not remove any stocK FRom THe cyliNdeR Head
poRtIon of tHe boreÁ
7
æore tHe caMsHaft geaR housIng pILot dIameter to dz5000 To 2Á50Ã5
INcH to a deptH of 0³3¶00 incH on BotH sIdes of the cylInder head on
the same cenTeR lINe as The camSHaft BeaRing BoRe³
çacHine sèocK
fRoé tHe sIdes of the RockeR coveR and cyliNdeR Head to pRovIde aN
)
ÆniNteRRÆpted Flat suRface between tHe tWo parts³
Ûhe two sIdes must
be paRalleL WitH a dimensIon of 6Á2¶Ç0 MIniMÆm FoR ReWoRk puRposesÁ
5/2êê
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