DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 32 of 1422
DMWR 92815220
1-5.
(.mt)
·
the H
e
r switch ±In tHe veHIcle operator's coMPart²ent) eNergIzes the ³anIfold
heater´µel soLenoId vaLve, tHe Heater IgNItioN uNIt¶ and spark P·ug foR each
Heater:S¸²uLtaNeously¹
FueL Is HaNd Pu²Ped tHrougH tHe ²anº»oLd Heater fuel
fILter¼Ad fueL solenoId vaLve aNd sprayed Into tHe Intake
anºfoLd¹
The »uel
Is ºgn½¾d by tHe spark PLug aNd burns In tHe iNtaKe ³anI»old as tHe eNgIne
Is cra¿ÀNgÁ and tHe »La³e heats tHe iNco³INg airÂ
ThIs »la³e-Heated aIr
aNd tHe Ãroducts o» c0bustIoN are fed dIrectly iNto tHe cylINders wItH LIttLe
Heat LOÄÂ
ÅhÆs results In an IÇedºate engIne response and assures coÈplete
cÉbustIDn at Low engine rPM and at noÊLoad operatINg conditIons wItH Low
a²bIeNt ËEPerature¹
ÌcÍ
ÎoLeNoId vaLveÏ
ÐHe ²aNI»oLd Heater fueL ºNLet soleNoid vaLve
PreveNts fueÑ Pu²peÒ By the fueL Pu³p assÓbLy »ro² eNtering tHe aIr IntaKe
²anºfold heater uNLess tHe Heater syste³ is energiZedÂ
A
³anifoLd heater fueL
returN cÔÕeck vaÖve and soLenoºd valve are located at tHe rear of the eNgINeÏ
ÐHe soL×ØoId vaLve Is aÙso energIZed ÚoPenedÛ WHen the ignitIoN unIt and Heater
sPÜrK PLÝgs are eNergºZed to peÞIt excess »ueL to be returNed to tHe »ueL
tanksÏ
7He ³aIn fuel backfLow
valve prevents bacK fLow of tHe »uel wHeN the
Purge P1ßP iN tHe drIver's co²Paràáent ºs actuatedÏ
)
±
_(l²L³
âMoKe GeneratInã sYstEÏ
ÅHe sMoKe generatºng systEä åIg¹
1´10µ1
¶·/18¸2¹
uses tHe eNgIne fueæ pu²P to suPpLy dIeseL fueLç »rÉ tHe vehºcLe »ueL
è
ta
é
N
k
s¶
t
two soLeNoId valves ²ounted at tHe rear of tHe eNgºNe¹
êHen the solë
eNoºd vìíves are energIzed Ìopened) tHey aLlow dºesel »uel to be sprayed Into
tHe eNgÆîïe eXhaust systÓÏ
Åhe »ueL vaporIZes aNd eXIts togetHer wItH the
engIne ðHaust gases¹
Ðhe fuel vapor cools on contact wItH the a²bIent aIr and
coNdeNsñ to foò a dense HóogeNeous s²oke screen¹
ÅHe electricaL poWer to
energiZe tHe soLeNoid vaLves Is suPPlied by tHe air cLeaner blower ³otor circuºtÏ
ôHIs PreVents accIdeNtal actºvatõon of tHe s²oöe generatIng systE wHen tHe
eNgINe
is
Not runnIN÷¹
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