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

  TM-9-2815-220-34 - Page 263 of 532

NOTE
Pipe plug threads In casTIngs mUsT be In
good condition ± prevenT oiL Leakage.
c. BalL and Need±e Bearing$²
( 1)
Re²Lace aLL GalLed, pit³ed´ or damaged
bearingsµ
± 2²
¶epLace aL· bearings which do noT conform
To tolerances specIfIed In The approprIaTE ¸repaIr
standarDS
¹ABlº»
³ 3´
¶efer ¼o ½M
9-2µ4
for informaTion on In-
spection¾ care´ and maIntenance of anTI¿frIctIon
bearinGs.
d³ Stud´³
¶epÀace alL ÁenT or Loose studs or sTuds
showing evIdence of sTre¼chIng.
¶epaIr mInor
damage wiTh a thread chaser» ¶eplace all s¼Uds
having stripped or damaged ThreaDs Ãemove and
repLace studs as outlIned In (1) and
¶·¸
below.
³ ¹²
stUd
IdeµT¶fcAt·oµ³
Stud identifIcatIon
TÄbLes appear in The repair secTions of thIs chapÅ
Ter.
Æach
TabLe conÇÄins The appropriatE in-
formatIon reGardinG stud setTIng heIgh¼È´ number
requIred and reference fIgUres of stUd iden-
tifIcatIon and LocatIonÉ
(
2´
RemOva±³
Êsing a stud extrac¼orË back
studs out sLowLy to avoid heatIng and possibÌe
sÍizure. When studs are broken off ¼oo shorT ¼o use
eXtrac±rË drill sTud and eXTract wITh a sui¼able
remover. ÎhorT studs may aLso be removed by
weLding a ÏIece of bar sÐock or a nuT ¼o sTud and
removing with a wrench.
STUD
stANdAR±
0.²3
³´µ7
OVER¶IZE
oveR·IZE
C¸L¹R cºE
»on¼
RE¸
Blu½
MaRK
0 C c
¾¿À215Á6
Figure
ÂÃÄ4ÅÆ
StomlRd 01±d M.e²³i&e ³´UD IµenTifcotIO¶·¸
( S²
Rep¸ACeMe¹º³
»a)
Ãepair minor Çhread damaGe In ¼apped
holeÑ wIth a used Ðap»
º b»
When threads are stripped or damaged´
or when stUd was removed from an alUmInUm
casting for loose fit´ aLways replace stud with nexT
Larger oversiZe´ or in cases of compLe¼Ò ¼hread
puLLout, driLL out threaded hoLes´ ¼ap hoLe for
ÓhreÔd insÍrt´ InstaLl insert and sÓandard sTud for
repair. Markings and coLor code indicates wheTher
sTud Is standard or oversize. Check marking and
coÀor as
shown In
fIGUre
3-¹¼½
¼o be sure
tM 9·2815·220-34
replacemenT is of proper sIze.
nOTe
When The Threads on each end of The stud
are a different size´ ¼He coarse thread
end must enTer the aLuminum casTIngÕ
(C¼
Studs available for replacement as
shown In fiGUre Ö¿14× are marked on The coarse
Thread end of sTUdØ
¾d¿
Ùpply a smalL amounT of OÆ engIne oIL
or ÚÙÙ grease Ðo Threads before Ins¼ÄLLIng sTud»
ÀeÁ
Ûrive stud intÜ ¼Äpped hole sLowly to
prevent heaTinG. ÝrIve ¼Þ seTtinG heiGhß gIVen in
approprIaTE ¼ÄbÀe.
àj Wáen ÐÄpped hoLes In casTings cannot be
fItÐEd wITh oversIze sTUds´ The holes in The castings
can be fiTÐEd wIth heÀIcal¿coil InserÐÈ àpara
SÂ39´
and studs of the oriGinaL siZe can then be instaLâedã
e³ DOwe±
Pim.
¶epÀace loose doweL pinsä åf
originaL doweL pin was onLy slighTLy loose´ insÇÄLL
new pin using sealIng compoundæ ÎpecificaTion
MILÂsÂü78. In
cases where The doweL pIn hole Is
grossly oUTçof roundæ IT will be necessary ¼o drIlL
The hoÀe oversIze´ fashion a bushInG´ and insTalL a
new doweL pin in the bushingè
F
PAiµºed
PAr½³
Ãetouch or painT partÈ as
necessary Ðo produée an accep¼Äbêe partë ¶e¼Üuch
or repainT parTÈ in theIr orIGinaL coÀor in acì
cordance wITh procedures conÐained in íM
±²
0½39Ä
g³ Gea¾¿ Aµd ShaF½³
1) ¶epLace aLl cracked gears and shafts´ and
shafTÈ that are bent or twIs¼ed.
³ 2´
¶eplace alL Gears and shafÐÈ which do not
conform ± ¼ÜLerances specified in the repaIr sÇan-
dards Ðables.
³ 3Å
Ãeplace alL gears and shafÐÈ having worn´
gaLLed´ nicked´ bUredË or piTtEd Teetá and splines.
¶emove any sharp fins and burs from spLines wiTh
cRocuS
îlïðñ
DipPed
In
±²y-ClEaN³ng
SOLv´nT
(p³D6´µ,
µYp¶
II)¶
I
Æ ÇÈ
¶epLace aLl splined gears and shafÐÈ ¼áaß
are damaged
Ç
The point of Impairing assembêy or
operaTIon. Ãeplace all gears and shaf¼È having
spLines whIch do noß ma¼ch properLy with maTinG
spLines»
¸•¹
BÀÁh¶ng, ¶µerÃÄ and BÅÆYhiÇg-ÈyÉe BeAringÊË
When bushings´ liners, and bushIng¿type bearinGs
are damaGed or worn beyond specified lImIòË
Generally The assocIaTed parTÈ wIth whIch They are
used must be replaced. ¶eference To
¶ ¹´
and
³ 2´,
beóow´ wiLl be made in the repair secTion for the
parTIcuLar parT when repLacemÍnT of bushings¾
Liners´ and bushingôtype bearinGs is reQuired.
³ ¹²
ReMOVA±Ì
ÝriLL out bearIng reÇaining pins
when Used TÜ secure bearinGs In casTings or
re¼aInIng cages when appõicabÀeö
÷øùNúe
º
»¼½¾


Back to Top