DMWR-9-2815-220
AVDS-1790 ENGINE OVERHAUL STANDARD
DEPOT MAINTENANCE WORK REQUIREMENT
DMWR-9-2815-220 - Page 26 of 1422
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DMWR 9-2815220
(d)
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Fuel in
1
ector nozzLes and tUbs.
TweLve fUeL injector nozzLes (fIgs±
1-8
and
1-9)
²;14³,
and
{
1/15´µ one peR cyLinderµ are Used to inject fueL into
the cOBustion chamers³
¶weLve fueL injector tuBes of eqUaL Length carry the f·e¸
¹ frºM the fUeL injection p»Np to the nozz¼es±
½he noZ¾Les on each cylinder Bank
are interconnected By fuel retU¿
±
to provide a path for the retÀrÁ of
excess fUe
²³
'.<
s
(e)
ÂueL PurGe sYsteó
A
ÃanUaÄLy operated ÅUrge ÅuÃp is ÆrovIded in the
vehicLe oÅerator's coÃÅartÇnt and Ès Used to clear the engine Éain fUel systeM
and flAÊ heater systeË of airµ and filL theM with fueL³
Ìost of the Åurged air
is reÉoved throUgh BLeeder vaLves located in the top of the priÉary ÍueL filter
and the fueL/water separator fiLter.
Îhe rest of the aIr is forced throUgh the
Ïain fUeÐ tUBes into the fUeÑ retUrn Lines and on to the vehicLe fueL tanks
ÌÍ
Water is reÃoved froÏ the systeÏ By a constant BLeed orifice in the ÆriÃary fUeL
filter and an aUtÒatic water drain In the fUeL/water seÅarator fiLter³
Ó/1Ô
)
±
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