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 34 of 532
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TM 9-2815±²²0³34
pressurized oIl Is forced thRoUgh The engiNe oIL
coo±eRs and o²± F³Lter to ´he engµne oI± ga±±erIes,
beaRiNgs, tuRbosupe¶chargers· fUeL injectIoN pump
and to ¸he p¹ston oiL sprayer NoZZºes. »hese NoZZLes
are Located IN The crankcase BeLow each cyLIndeR
and pRovide a con¼inUoUs oIL spRaY To The pIsTons
and c½ºinde¶ Wa±Ls¾ A pressURe ReguLaTor vaLve¿ Ào-
cated on Áhe Dght siÂe Of Ãhe c¶ankshaÄÅ dampeÆ
and oi± ÇÈLteR hoUsing Is inÉuenced By the pressURe
In the ma²n BearINg oiº ga±±e¶Y and ReTUrns The
²ncomIng exCess unFÊLÃe¶ed oiL to the oIL panË
b. Oil P<n´
ÌhE oiL pan (IJgÍ
µ¶·)
is a oneÎpiece
aLÏmInÐM aLLoy casting ÂIvidÑd into a pressUre oiL
/
pump compartmeNt, oiL reserve compaRtÒeNT, and
The sUmp compaRtmeNT aTÓ The FRoÔÕT oF the panÖ
×oRed passages From each oF the compaRtmenTs
terminate aT a centraL ouTLet and permitS draiNing
a±L of The compa¶TmenTs from a singLe dØainage
poINtÖ A coRed passage a±so pe¶mIts draInIng The oIL
cooLeRs and oiL fiLter compartmenT direcTLY Without
peRm²tt³ng anY sLUdge to ente¶ the o²L panÙ Úhe oiL
paN is desigNed To maintain a consTanÛ oiL LeveL
above the maIn pRessuRe oI± pump p²cKup Tube Jn
The pressuRe oIL pUmp compa¶tment dUr³Üg vehIcLe
opeRation ¶ÝgardLess of the angLe Þt ßHiàh The ená
gine may Be inc±Inedâ
TA 126084
I
Figure ±-9. ERIG²³´ lUbµ¶cat·on &y¸¹ºm»
C¼
OIl Pump¸
ãhe oä± pUmp assemb±Y consists oF
FoUr sectioNs comb²Ned as a sINgLe unit. »he
scavenge oiL pUmp section oF The unit picKs up oiL
åæom The Front eNd comparTmeNt oF the oIL pan and
deL³veRs IT To the maIN pRessure pUmp o²± comparTç
meNtè Úhe ma²n pressure o²± pump section p²cks Up
oiL f¶om iTs ¶espective compa¶tment and suppLies
oIL to the engINe oiL gaLLeries, beaRIngs, and To the
pIsTon oi± spraYer NozZ±esé Úhe ±eve± in The pressure
pump comparTmeNt is maiNTained By a dUaL In±eT
LeveLiNg pUmp Which reTuês aNY eXcess oiº to the
reseëve compartment: ìiL Is pumped f¶om the Re-
serve compartmenT by Two maKe up pUmps IN a
sINgLe pump sectIoNí Úhese pumps p²ck up o²L From
¹º¹»
ChaNge 2
opposiTe coîNeîs of the reserve compaRTmenT and
d²scharge ²t INTo The pîessUre pump compartmenTï
»he dua± pUmp design Insures ¶etURn oð oi± ñrom
the Rese¶ve compa¶tment undeR aLº operaTIng coná
dItIoNs, co±d oILò s±ope opeRaT²oN, eTcï
d¼ O½L F¾ltErs A¿d co¿ÀRÁl VÂlvÃSÄ
»he eng²Ne oi±
Fiºte¶s óÇôgõ
ÅÆÇÈ
aNd The bypass vaLve are ±ocated IN
The cRaNKshaFt damper and oIö ðI÷TeR hous²ng aT The
føoNT of The eNgine. ALL engiNe oiL passes thRoUgh
the oIL fILteRsù ãhe o²L ÇúûTer bypass vaLve opeNs at a
difFeReNtIaL pRessURe of
ÉÊË6
psIÖ ãhe bypass vaLve
permIts oI± To bYpass The Fi±Ters In The event thaT
they become cLoggedÍ
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