DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 25 of 1422
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(Cont)
DMWR 928152±
caNpArTmenT±
²he du³l pUmp desig´ I´sUres RetUµ of oIL fRa¶ The Rese·ve compARt-
M´t U´der A¸¸ opeRA¹´g co´ditIo´s, co¸d oº¸» s¼ope opeRATio½, etc¾
¿d)
OIÀ fi¼tEs A½d co½Tro¸ vA¸ves±
ÁHe e´gI´e oI¸ fi¼TeRs A´d tHe by-
pAss vAÀve Are ÂocAtÃÄÃ Å´ the cRA´ksÆAFT DAmper A´d oI¼ Çi¸TeR HoUsIng AT tÈe
front oÇ The e´gI´eÉ jʼ¼ e´gIne oI¼ pAsses tHroUgH tÈe oI¸ ÇI¸Ters¾
²he oI¸
fIËTer byPAss vA¼ve
e´s At A dIÇÇere´TIA¼ PRessURe of
3±²6
PsiÌ
ÍHe bypAss
vA¸ve peÎÏIts oIË ToÐypAss the ÇI¼TeRs I´ tHe eve´t thAT tHey Become c¸oggedÉ
¿eÑ
Òi¸ sAmÓ¼ÔnG s
t
sTemÕ
ÍHe oÖ¼ sAmP¼I´g sysTem consIsTs oÇ two togg¼e
vA¼ves con´ec×eØ ×o Ùe
01
cooÚI´g sysTem PeÛITTIng eAsI¼y AccessIb¼e sAmP¼Ü´g
oÇ THe engI´e A´d tRÝsmIssIo´ oI¼ To deteRmIne tHe ´eed Çor oI¼ chAngesÉ
ÍhIs
peÞNITs A more pRecIS metÈod of deteßàInIng THe ÇreqUe´cy of oi¼ cHA´ges±
O´ tÈe
áde¼s
AVDS³1790³2C, ´VOSµ¶790-2cA· AVdS ¸7¹Q-º_
A´d
AVdS»¶790¼2DA
±
t½
¾re
tWo
âã
ä
åoUnted TogeTæR o´ Top
oÇ THe rIght BA´K
!
oi¼ coo¼ersç o´e
Õ
èoR e´gi´e
oI¸ Aéd êJe foR TrAnëIssIo´ oI¼±
ìngI´e mode¼
AVDS-¶790³2DR
HAsíî
ï
²
P
1±
³
¸ocATed
6
tHe fi¼terðhoUsI´g coveR on tHe fro´T of tÈe e´gine±
A S±.c²i Jja
± ²
(9)
ñUe¸ sYsTeò
ÁÈe fUe¸ systems Used o½ tHe
AVDS³1790-2¿À AVDSÁ1790³2ÂAÃ
AVdSÁ¶790-Ä
A´
ó
avÅÆ1790³2DA
e½gines Are Ide´TIcA¸É
ôIgURe
¶Ç8(È/È4ÉÊË
Is A
schemATIc dIAgRAm of õHe mAIn fUe¸ system Used o´ tHese e´gI´esö
ÍHe ÇUe¼ system
Used o´ THe
AVDSÌ179Í2DR
e´gi´e Is sImI¼Ar except for tHe dIfferences in The fue¸
sUpP¼y pUmp AssemB¸y ÷RIve A´d RoUTI´g oÇ fUe¸ i´øectIo½ pUmp overf¸oW ÇUe¸ö
ùIgUre
¶-9 (Î/1±
)
is
úû
A schemAtIc diAgrAm of THe mAÜ´ ÇUe¼ sysTem Used on tÈü
AVdS¼¶790-2DÏ
e´gI´e±ý
¿AÑ
þÿe¸ sÿ
j
AVdS³¶790-2Ð
AVDS-1790-2ÐA
AVdSѶ790³2Ò
And
AVDSǶ790³2DA
ö
³
he engi´e drive´ vA´e Type fUe¼ sUpP¸y pUmp AssemB¼y Is Used
to sUppĀy fUe¸ U´der āressUre to tHe ÇUe¸ I´ĂectIo´ pUmp±
ăHe fUe¸ pUmp Is
crAnĄsHAąT drIve½ by ;He fU
e
¸
.
pUmp drIve AdAPteR
(4²,
ÇIgÉ
1-6Ë (¶/8
) And The
dRive coUP¸ing
(²3³
¸VcATed AT tHe ÇronT oÇ The e´gIneö
¿BÑ
ĆUe¼ sU
J
Um
AssemB¼
ćode¸
AVOS³1790¼2dR Ó
A
righT A´g¸e dRIve
Is provIded o´ tHe dĈIve
oUsIng ÇoR tHe vA´e type
fUe¸ sUPp¸y pĉP Assemb¸y¾
ÁÈe
PlLP
is sImI¼AR to TĊ o´e Used
o½ the oTHer mode¼s eXcept tHAt iT RotAtes coU´Terċ
cÀocKWIseÉ
²he drIve hoUsI´g Is ¼UBrIcATed WiTh oI¼ exter´A¼Čy roUTed Çrom The
engIne mAIn oܼ gA˼ečy o´ THe rIght sIde oÇ TĎe cRA´ĄcAseÉ
(c)
ôue¸ I´ďectio´ meTerI´Đ đUmĒö
ÁHe fUe¼ I´øecTIo½ meteRi½g PUmē is
¸ocATed I½ tÈe
²V"
oĔ THe e´gi´e BeTWee´ THe fA´ dRIve HoUsI´gsĕ A½d sUppÀies
fĖe¸ U´deR HIgH pressėre To eAch cy¸i½deR¾
ÁHe pUmp is drive½ At e´gI´e speed
Çrom the fAn dRĘve hoΜsI´g ÀocATed At The reAr oÇ THe e´gIneÉ
A
fUeę I´ĚecToR
PUmp AdvAnce Assemě¸Ĝ
Ô9Õ
fIgĝ
1³6Ë (¶³ÖË
Is i´corpoRAted In tHe AccessoRy
drIve HoUsi´g to AĞtoğATicA¸¸y provide A grAdUA¸ degRee AdvA½ce oÇ i½øectio´
tIĠI´g dUri½g THe e½ġi½e speed rA½Ģe fRģĤ Id¼e toĥ Rpm ¾
³
c²
1;1×
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