TM-9-2815-220-34
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED, 12-CYLINDER, ASSEMBLY; MODELS AVDS-1790-2C (2815-00-410-1203) AND AVDS-1790-2D (2815-00-410-1204)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
TM-9-2815-220-34 - Page 273 of 532
Figure
3·152.
ChEckInG toRqu± <1/ ²³´aµ²´ b¶a·µN¸ ¹Op
Jtuj±
(3) Spread a thin coat of PRussian blUe PaRt No.
MIL·±-30501, over ²tee³ back² of Upper and ³ower
main ²³eeve bearing ha³ve² to ²how the ²lEEve Bear´ng
contact ²URface with the µain bearing bore in crank¶
ca²e¸ ¹n²ta³³ Bear´ng² in the´r original ³Oation ´n
crankca²e aºd µa»n bearing cap²¼
(4)
Check
c½earance
between
Upper
bearing
f³ange
and
crankca²e¼ ¾n²tall Uppe¿
µa´n th¿À²t
²leeve beaRing ´nto NoÁ Â µain beaRing ²eat of crankÃ
ca²eÄ Åea²ure cÆearance Between bearing FÇange and
crankca²e À²ing feÈÇeR gage (fig. 3·ÉÊ)Ë C³earance
²hoUÆd Be ÌÍÎ4 to ̸Ï8 ´nchÁ
f´,Ur±
²-³´²µ
CHº»kµ¼½ ¾l¶a·A¿E BÀTwÁEN ÂPÃ
E· mÄÅÆ ÇhÈÉt
bEOÈÊƸ ËLÌÆGÍ ANd cÎÌUkÏÐ.
TM
9-2815±2²0³34
(5) Ðheck c³eaÑance Between
the
³oWer µain
thrÒ²t bear´ng f³ange anD thRU²t ÓeaRing cap in the
Ôaµe µanner a² ²hown in fiGÀre 3Õ153¸
Ö6× AppÇy a ³´ght coating of engiØÙ oi³ To Úhe eÛD²
of the ²eVen µain BeaR´ng cap² WitH ²³eeÜe beaRing
ha³ve² in²ta³³eÝÞ ß²ing cranKca²e ²pàeading táâ ãaRä
Noå æ7ç61è a² ²hown in éiGÀRe 3ê13Ìë in²ta³³ the
beaR´ng cap² with bearing ha³ìe² ´n theiR pRoper
íOat´on² in the cRankca²eî accoRding ïo the ³ðation
nUmber ²tamped on the crankca²e anD capñ òhe ²ide
of the bear´ng cap markeD" óôY õö÷ø ùú²t face the
rear of the crankca²eÍ
Ö7× AppÇy a ²ma³³ amoûnt of üõ ýþ eÛgÿÛÙ oi³ oR
ĀAA gÑea²e to the thReaded area of
eacā µain
Bearing cap ²tUdĂ ăn²ta³³ a p³ate wa²heR on eaĄh paiR
of µain BeaRąng ²tUd²Í ăn²ta³³ a ²³otted nût on each
main bearing ²tûd bût do not tighTen nUt² at thÿ²
t´µeÁ
Ö8× P³ace a ²URface p³ate and dia³ indicator gage
on crankca²e f³ange with gage indicatoR Re²Ććng on
end of ²tUd¸ Åea²Ure and record heigĈt of each ²tUdĂ
ĉorqUe t´ghten µain ÓeaRing ²tUD nût² to
´µ
poUndĊ
´nche²ċ A³ternate³y t´ghten a³³ FoUr nUt² on each
main Bearing to a torQUe of Čč-82Ď poUndďinche²Ă
Åea²Ure the he´ght of each ²tUd aéter fina³ torqUeĐ
òhe d´éfđrence Between the ²tUd height before anD
after torqUe tightening ´ndicate² ²tUĒ ²tRetchĐ Norē
µa³ ²tUd ²tretch ´² ÌĔÌ19 to ÌĕÌ22 inĖ ėpp³y additionaÆ
torĘUe to obtain a ²tUd ²tretch of ÌĂęÉ9 to ÌĚ022ě Ĝo
not exceed þĝĞ24ğ ăf any ²tUd ha² ²tretched µoRe than
ĞåĞ24 inĠ at ČÎ poUndġinche² toRQûeĢ
it µU²t be
¿eplaced¼ ģefer to table 3ê2 when rep³acing ²tUd²Ĥ
ĥ9) ăn²taƳ the 1 engine cRankca²e rod² (13Ģ figÁ 3ġ
ĦÂ9) in the ho³e² provided throUgh the cRankca²e and
µain bearing cap²Đ ħĨûaÇize the eXĩen²ion of the
threadEĪ portion² of the rī² on each ²ąde of the
crankca²e¼ App³y a ²µa³í aµoûnt of üõ 3þ enginĬ oi³
or ĀAA Gĭea²e to the threaded portion² of each rĮdĕ
ăn²ta³³ a pÆate wa²her and a 9/16 ²³otted nût on each
end of the rī² Ö12 and 11į figĐ 3İÉÂ9)Á
Ö1Ì× StaRting at the µaın thrU²t beaRing capį
With aid of an a²²i²tant to ho³d the nût²
01±
the op¶
pIJsite ²´de of crankca²e¸ alteRnateÆy tightijn aƳ µa´n
beaRing cap enĴĵne crankca²e RIJĪ nût² to 6Ķþ pķUÛDĸ
´nche² toRqUe¼
(¶·)
Check the in²ide
DiaùeteR
of
the
maÿn
BeaRinGs with a dia³ BoRe ´ndicator a² ²hown ´n fiGûre
3Ĺ1ĎÂ again²t the ³im´ĺ² ²pecified in Repair ²tanĻarDļ
(tab³e 3ġ1×Á ģep³ace BeaRing² Which do noĩ µeet the²e
ReqU´rement²Ě NeW beaRings mû²t a³²o Ľe dia³ BoRe
chEckEĪľ ģemove the main bearing cap² and ÓeaRing
ha³ve² fRIJµ the crankca²e and check contacĩĿ ²URFace²
a² ´ndicated Óy Prŀ²Ôian tRan²feRŁ łÙp³ace bearing²
that do not µake 75 peRcent contact with crankca²e
bearing boreŃń ģepeat dia³ boRe check of neW beaŅinGņ
´n²ta³³EĪ¸
3¸7¹
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