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 38 of 532
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TM 9-2815-220±34
²³²7.
Manifold Air Induct±oN aNd HeateR
SystEm
a. TmbosuperchaRger ASsEMBlies±
Exhaust gAs
driven TuRbosupe±cha±g²± assemblIes (f³gs. 1-´ And
´µ¶),
one FoR each bAnk of cyl³ndeRs, a±e mounTed on
eAch sIde of The eng³ne, aT The ReARµ ¶he Tu±·
bosupeRcha±geRs Inc±ease The pRessuRe of The In¸
TAke a³R The±eby del³ve±³ng a hIgheR dens³Ty A³± to
the cyL³nde±s as compA±ed w³Th a nonsupe±chA±Ged
eng³ne¹ ¶h³s h³ghe± dens³Ty a³Rº W»Th A pRope± ¼Ue½
¼¾owº ³nc±eAses en¿ÀNe powe±.
²³ IntC´ke µ¶N·fOld HeateR
(ÁÂÃ
·¸¹º»¼
(½»
¶he ³nTake mAnIfO½d (¼iÂsÄ
´µ¾
and
´µ¶¿À
wh³ch d³st±Ibutes ³nducT³on a³± to eAch bank o¼
cy½³ndeRs, ³s equ³pped
\
Th An e½ecTÅÆcal½y ope±ated
Ǿame Type ³nTake mAn³fȽd heaTe±. Éhe heAte± Is
p±ov³ded Ês an a³d fO± co½d weaThe± sta±T³n And
co½d weathe± ope±atIonsË Ìpe±aTIon o¼ The heAtͱ
sÎÏtch (³n The VehIc½e ope±Ato±'s compA±Tment)
ene±Âizes The mAnI¼o½d heaTeR fuel so½eno³d Va½Ve
'
The heAte± ³gn³tIon un³t, and spARk p½ug ¼È± each
heaTe± s³multaneously. Ðue½ Is hand pumped
ThRough the manI¼o½d heaTeR fueÑ fÒ½TeR and ¼ue½
solenoId valve and spRayed ³nTo the ³nTAke mAnÓ
³Fold. ¶he fuel Is IÔÕ³Ted by The spaRk pLug And
bu±ns ³n The ³nTake manIfold as The en³ne Is
cRAnk³ngº and The ÇÖame heaTs The IncomIn A³R×
ØhIs ÇÙAmeÚheaTed aIR and the p±oducTs o¼ combusÛ
T³on A±e fed d³±ecTly ³nTo The cylIndeRs \ÜÝTh ½³Tt½e
heaT ½oss. ¶hIs ±esulTs ³n an ³mmedIaTe enÂÞne ±eß
spoàSeº and AssuRes compleTe combust³on at ½ow
engÝne ±pm And at noÚ½oad ope±aT³ng cond³t³ons
áâTh ½ow Amb³ent TempeRAtu±eµ
ÁÂÃ
Éhe man³fO½d heAte± fue½ ³n½et so½enoId
va½ve p±events ¼uel pumped by The ¼ue½ pump asÛ
sembly ¼±om enTe±³ng The A³R ³nTake man³¼o½d hea¸
teR un½ess The heaTe± sysTem Is ene±g³zedã ä manÛ
I¼o½d heateR åæe½ ±eTuRn check Valve and so½eno³d
vA½ve a±e ½ocated aT The ±eA± o¼ The engÝneç ¶he
soleno³d va½ve ³s a½so ene±èÝzed éopened) when The
³GnItIon un³T And heaTeêë spA±k p½ugs A±e ene±gìzed
íî pïðm³í
excess
fuñ½
to be reTuREd To
íh
e
fuïl
I
í
a
nk
s
× òhó
main
f
u
e
l baCKôîw
vAlVE preveNTs bACk
õöw
öf
íh÷
fu÷l
whEn
íh÷ puøù÷ pump ³n
tHe
drIVEr's
úömpûüím÷ní ³ý aúíuþíódÿ
²Ä²ÅÆ
²xhaUst System and Turbosuper-
c³aRger
a¸
¶he exhausT system consIsTs of fouR manIfolds,
one Fo± each G±oup of th±ee adjacenT cy½IndeRs. Øhe
Two exhAusT man³fO½ds on each cy½IndeR bAnk aRe
connected to the Tu±bosupeRchaRgeR on The³R ±e¸
spect³ve s³de o¼ The engIne.
bÇ
ĀxhAusT gases ¼±om each sIde of the engIne
ente± A tu±bosupe±chA±ÂeR and ARe ¼oRced a±ound a
Tu±b³ne hous³ngº ±Ad³A½½y ³nwa±d, And ThRouÂh a
ÈÉÊË
āHĂnăe
3
nozz½e rÒng towA±d the tu±b³ne whee½Ą Éhe exhaust
gAses dR³ve The Tu±b³ne whee½º whIch In TuRn d±Òves
The compRessoR wheel sInce both whee½s ARe on a
common shafTµ ąnTAke manIfoLd a³± enTeRs AT The
cenTeR of The compRessoR wheel And f½ows Rad³ALly
ouTwA±d Th±ough a d³ffuse± secTIon ³nTo The comĆ
p±esso± hous³ngÿ Øhe aIR at IncReased Ve½oćITy then
½eaves Th±ough a Tang²nT³A½ outĈeT on The oĉTs³de of
The compResso± housIng And enTeRs The ³nTake
man³fO½dĊ
c.
Éhe exhAusT gases a±e expe½½ed ¼±om the Tu±ċ
bosupe± ½Čč±ge±s ³nto The veh³cle exhaust systemĎ
ÌÍÌÎÏ
COOL´nG µY¶t·¸
NOtE
±hE
kďY
²Umb³´s sµoWn
BĐ½îđ
.n pa¶En-
B
I
hďĒďĒ
r
ï
F
r
To
ÐigÑ ÒÓÔÕ
aÖ ×ansØ
¶he Top of The enÂÝne ³s sh±ēuded To
house Two coo½Ing ¼A
n
s
ÁÙÚ
And
ÙÛÜ
wh³ch dRaw coo½
aIR ¼Rom the undeRsIde o¼ The enÂìne, th±ough The
cyl³ndeR ¼Ins, and d³schA±Ge The hoT AI± VeêĔT³caĕ½y
f±om The Top sh±oudÄ ¶he ¼ans a±e AttAched To
AdApTeRs
ÁÝÞÃ
and aRĖ mounTed on shafTs whIch aRe
d±IVen Th±ough a ¼An d±³ve cluTch Assembly
ÁÝÚÃß
¶he ReaR fan c½uTch Is dėĘven by The ReAR fAn d±Ive
shaft
ÁÝàÃá
fan d±IVe beVel geA±shafT
âããäå
and fAn
dęĚi ven gea±shAfT
ÁÝæÃç
¶he åěonT ¼an cluTch ³s dR³ven
by the ¼Ront fAn d±³ve sha¼t
èÝÂÃ
And AnoTheR ¼An
d±Iven ÂeaRshĜ¼t
ÁÝæÃé
B¹ Faº DRive
aêd
»Lu¼½¾
ĝ¼ÒgĞ
ëìëãíî
¶he ¼an c½uTch
³s oI½ coo½edµ Éhe ¼an clutch dRÒVe and d±³ven d³sks
a±e ½oaded by the cenTR³fuGa½ AcT³on o¼ c½utch bA½ls
and sp±ÝnGs housed ³n The clutch assemb½yğ ¶he
ba½½s And spĠġìngs A±e ³n The dĢÆven membe± and
app½y upđaRd ¼oRce To The cluTch d³sksµ Éhe c½utch
o³½ enTe±s the fan d±³ve ve±T³cal shA¼t ¼±om the fan
dģĘve hous³ng thRough an annula± g±oove ³n The
sha¼tË Éhe oIl ÇÙows Th±oĤuÂh A cenTRA½ hole ³n The
shaft To a dIst±³buTo± wheRe ³t ³s d³speRsed to The
bal½ beAR³nGý and to The c½utch d³sksĄ Éhe o³½ moves
beTween The c½utch d³sks by cenT±I¼ugal acTIon And
d±A³ns back Th±ough The fAn dR³Ve hous³nG ³nTo The
enGìne o³l panĊ
C±
eïGðêñ
a1d TRa¿sÀissiÁ¿ ÂiL ÃooÄeRs
(ÇĥgÄ
´ò´óô
ä½½ TRAnsmIssIon and enGIne oIl cool³ng ³s acÓ
complIshed by exTeĦal oI½ cooleRsÄ Øhe o³½ coo½eRs
aRe ½ocaTed on The sIdes of The eng³ne Above the
cy½³ndeRs. ä³± ³s dRAwn Th±ough the o³½ coo½eRs by
the coo½³ng fansÄ ä TheRmosTaT³c conTRo¾ vA½ve ³n
each oI½ coo½e± cont±o½s the tempe±aTuRe of the o³l
¼±om the coole± by pe±m³Tt³ng cold oIl to bypass the
coo½e±sĎ ¶h³s vA½ve a½so pe±m³Ts o³l To byPAss the
coole± ³n The event ThAT The coole± becomes c½oÂgedħ
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